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Beta2 Updates

Browse Source 
Now 14 Days
Accuracy Indicators
Sunrise/Sunset
Moon Cycles
Early Pro Limitations
New Code Formatting
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fraxle
2026-05-11 11:42:32 +01:00
parent 2e1f3b7c48
commit cce78feea7
8 changed files with 1961 additions and 877 deletions
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assets/index-cxJ3Sbx3.js
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assets/sunscope.css
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/* ════════════════════════════════════════════════════════════════════════
SUNSCOPE · styles
════════════════════════════════════════════════════════════════════════
QUICK MAP — where to find and change common things
──────────────────────────────────────────────────────────────────────
Page background body { background }
Body text colour .utci-app { color }
Brand "brass" colour search file for #c8922a
Headline font .utci-title { font-family }
Body text font .utci-app { font-family }
Max page width .utci-shell { max-width }
Mobile breakpoint @media (max-width: 800px) at the bottom
Big UTCI dial size .scope-ring { width / height }
COLOUR PALETTE (the "warm parchment & brass" theme)
──────────────────────────────────────────────────────────────────────
#f5edd6 parchment page background
#fffcf2 soft cream cards, search box, table
#fdf8ee warm cream toolbars, legend, about block
#f0e4c4 pale honey table heading row
#fef3dc warm hover buttons on hover
#fef8ea row hover table row on hover
#fff8e4 "now" row the currently-active hour
#1e1208 espresso headings + emphasis
#4a3420 warm dark body text in the table
#6b4f2a muted bronze subtle emphasis
#7a5c2a tagline brown italic intro line
#9a7d5a soft brown column toggle text
#b09870 warm grey muted labels
#c0a880 pale dust night-row text, footer
#c8922a BRASS brand accent (links, dial, focus)
#a06e18 deep brass hover state for some links
#c9b08a warm border panel borders
#d4c0a0 soft border toolbar/legend borders
#ede4cc line table row dividers
FONTS
──────────────────────────────────────────────────────────────────────
Fraunces serif display titles, day labels, hour cell
Manrope body sans-serif paragraphs
JetBrains Mono numeric monospace table data, small labels
FILE STRUCTURE (in order below)
──────────────────────────────────────────────────────────────────────
1. Fonts + reset
2. Page background & shell
3. Top navigation
4. Header (title + dial + search)
5. Day tabs
6. Column toggles
7. Hourly table
8. Now-row + night-row decorations
9. Status & error banners
10. Legend
11. About + footer
12. Responsive (mobile)
════════════════════════════════════════════════════════════════════════ */
/* ── 1. FONTS + RESET ───────────────────────────────────────────────── */
@import "https://fonts.bunny.net/css2?family=Fraunces:opsz,wght@9..144,300;9..144,500;9..144,700;9..144,900&family=JetBrains+Mono:wght@400;600&family=Manrope:wght@400;500;600;700&display=swap";
*,
*:before,
*:after {
box-sizing: border-box;
margin: 0;
padding: 0;
}
/* ── 2. PAGE BACKGROUND & SHELL ─────────────────────────────────────── */
body {
background: #f5edd6; /* parchment */
}
.utci-app {
font-family: Manrope, sans-serif;
color: #1e1208;
background: #f5edd6;
min-height: 100vh;
padding: 52px 28px 32px;
position: relative;
overflow-x: hidden;
}
/* Two big soft glows in the corners — pure decoration.
Comment one out to remove that side's glow. */
.lens-bloom-a {
position: fixed;
top: -200px;
left: -200px;
width: 700px;
height: 700px;
border-radius: 50%;
background: radial-gradient(ellipse, rgba(255, 210, 60, 0.18) 0%, transparent 65%);
pointer-events: none;
z-index: 0;
}
.lens-bloom-b {
position: fixed;
top: -80px;
right: -140px;
width: 520px;
height: 420px;
background: radial-gradient(ellipse, rgba(200, 146, 42, 0.13) 0%, transparent 68%);
pointer-events: none;
z-index: 0;
}
/* The centred container that holds everything. */
.utci-shell {
position: relative;
z-index: 1;
max-width: 1400px;
margin: 0 auto;
}
/* ── 3. TOP NAVIGATION (Home / About links in the corner) ──────────── */
.utci-topnav {
position: absolute;
top: 0;
left: 0;
right: 0;
z-index: 10;
display: flex;
align-items: center;
justify-content: flex-end;
padding: 18px 32px;
gap: 28px;
}
.utci-topnav a {
font-family: JetBrains Mono, monospace;
font-size: 16px;
letter-spacing: 0.1em;
text-transform: uppercase;
color: #b09870;
text-decoration: none;
border-bottom: 1px solid transparent;
padding-bottom: 2px;
transition: color 0.2s, border-color 0.2s;
}
.utci-topnav a:hover {
color: #c8922a; /* brass on hover */
border-bottom-color: #c8922a80; /* faint underline */
}
/* ── 4. HEADER (title + dial + search, three-column grid) ──────────── */
.utci-header {
display: grid;
grid-template-columns: 1fr auto 1fr; /* title | dial | search */
gap: 32px;
align-items: center;
padding-bottom: 32px;
border-bottom: 2px solid #c9b08a;
margin-bottom: 32px;
}
.header-right {
display: flex;
flex-direction: column;
align-items: flex-end;
justify-content: center;
}
/* The big "SUNScope" wordmark */
.utci-title {
font-family: Fraunces, serif;
font-weight: 900;
font-variation-settings: "opsz" 144;
font-size: clamp(48px, 6vw, 80px); /* responsive — scales with viewport */
line-height: 0.9;
letter-spacing: -0.03em;
color: #1e1208;
}
.utci-title .title-sun { /* "SUN" — bold + brass */
color: #c8922a;
font-weight: 900;
font-style: normal;
}
.utci-title .title-scope { /* "Scope" — italic */
font-style: italic;
font-weight: 900;
color: #1e1208;
}
.utci-title .title-beta { /* the small "beta" subscript */
font-size: 0.38em;
text-transform: none;
font-weight: 400;
letter-spacing: 0.05em;
vertical-align: super;
color: #b09870;
}
/* "See the sun the way..." */
.utci-tagline {
font-family: Fraunces, serif;
font-style: italic;
font-size: 17px;
color: #7a5c2a;
margin-top: 14px;
}
/* The credits line under the tagline */
.utci-subtitle {
font-family: JetBrains Mono, monospace;
font-size: 11px;
text-transform: uppercase;
letter-spacing: 0.18em;
margin-top: 10px;
color: #b09870;
}
.utci-subtitle-link { /* The "UTCI" link in the credits */
color: #c8922a;
text-decoration: none;
border-bottom: 1px solid rgba(200, 146, 42, 0.4);
transition: border-color 0.2s, color 0.2s;
}
.utci-subtitle-link:hover {
color: #a06e18;
border-bottom-color: #a06e18;
}
/* "↳ Pangbourne, Berkshire" */
.utci-current-loc {
font-family: Fraunces, serif;
font-style: italic;
font-size: 18px;
margin-top: 12px;
color: #1e1208;
}
/* The lat/lon next to the location */
.utci-loc-coords {
font-family: JetBrains Mono, monospace;
font-style: normal;
font-size: 11px;
color: #b09870;
margin-left: 10px;
letter-spacing: 0.08em;
}
/* The big UTCI dial in the middle of the header.
Change width/height to resize it. */
.scope-ring {
width: 220px;
height: 220px;
display: block;
}
/* The search box on the right of the header */
.utci-search-wrap {
position: relative;
width: 300px;
}
.utci-search-label {
font-family: JetBrains Mono, monospace;
font-size: 10px;
text-transform: uppercase;
letter-spacing: 0.18em;
color: #b09870;
display: block;
margin-bottom: 7px;
}
.utci-search {
width: 100%;
padding: 12px 16px;
border: 1.5px solid #c9b08a;
background: #fffcf2;
font-family: Manrope, sans-serif;
font-size: 14px;
color: #1e1208;
outline: none;
transition: border-color 0.2s, box-shadow 0.2s;
}
.utci-search::placeholder {
color: #c0a880;
}
.utci-search:focus {
border-color: #c8922a;
box-shadow: 0 0 0 3px #c8922a24; /* brass glow when focused */
}
/* The dropdown list of city results */
.utci-results {
position: absolute;
top: 100%;
left: 0;
right: 0;
background: #fffcf2;
border: 1.5px solid #c9b08a;
border-top: none;
max-height: 260px;
overflow-y: auto;
z-index: 50;
box-shadow: 0 8px 24px #6446141f;
}
.utci-result {
padding: 11px 16px;
cursor: pointer;
border-bottom: 1px solid #ede4cc;
font-size: 14px;
transition: background 0.12s;
border-left: 3px solid transparent;
}
.utci-result:hover {
background: #fef3dc;
border-left-color: #c8922a; /* brass marker on hover */
}
/* The "GB · 51.48°, -1.07°" line under each city */
.utci-result-meta {
font-size: 11px;
color: #b09870;
font-family: JetBrains Mono, monospace;
margin-top: 3px;
letter-spacing: 0.06em;
}
.utci-searching {
margin-top: 7px;
font-size: 10px;
color: #b09870;
font-family: JetBrains Mono, monospace;
letter-spacing: 0.14em;
text-transform: uppercase;
}
/* ── 5. DAY TABS (today / tomorrow / etc.) ─────────────────────────── */
/* Note: each tab's background colour comes from inline styles in
sunscope.js (the confidence bands). This file only handles spacing,
typography, and the active-tab underline. */
.utci-day-tabs {
display: flex;
margin-bottom: 18px;
border-bottom: 2px solid #d4c0a0;
}
.utci-day-tab {
padding: 12px 24px;
cursor: pointer;
font-family: JetBrains Mono, monospace;
font-size: 10px;
text-transform: uppercase;
letter-spacing: 0.14em;
background: transparent;
border: none;
color: #b09870;
border-bottom: 2px solid transparent;
margin-bottom: -2px;
transition: color 0.2s, border-color 0.2s;
}
.utci-day-tab:hover {
color: #6b4f2a;
}
.utci-day-tab.active {
color: #c8922a;
border-bottom-color: #c8922a;
}
/* The "Mon 12 May" date underneath each tab name */
.utci-day-date {
font-family: Fraunces, serif;
font-style: italic;
font-size: 13px;
text-transform: none;
letter-spacing: 0;
display: block;
margin-top: 3px;
color: inherit;
}
/* ── 6. COLUMN TOGGLES (the "Columns: Hour Air RH ..." bar) ────────── */
.col-toggles {
display: flex;
flex-wrap: wrap;
gap: 6px;
align-items: center;
margin-bottom: 10px;
padding: 10px 14px;
background: #fdf8ee;
border: 1.5px solid #d4c0a0;
}
.col-toggles-label {
font-family: JetBrains Mono, monospace;
font-size: 9px;
text-transform: uppercase;
letter-spacing: 0.18em;
color: #b09870;
margin-right: 4px;
white-space: nowrap;
}
/* The little pill buttons */
.col-toggle {
padding: 4px 11px;
cursor: pointer;
border: 1.5px solid #c9b08a;
background: #f5edd6;
color: #9a7d5a;
font-family: JetBrains Mono, monospace;
font-size: 9px;
text-transform: uppercase;
letter-spacing: 0.1em;
transition: all 0.15s;
-webkit-user-select: none;
user-select: none;
}
.col-toggle:hover {
border-color: #c8922a;
color: #6b4f2a;
background: #fef3dc;
}
/* The "pressed-in" active look */
.col-toggle.on {
background: #c8922a;
border-color: #c8922a;
color: #fff;
}
/* ── 7. HOURLY TABLE ────────────────────────────────────────────────── */
.utci-table-wrap {
overflow-x: auto;
border: 1.5px solid #c9b08a;
background: #fffcf2;
}
.utci-table {
width: 100%;
border-collapse: collapse;
font-size: 14px;
}
/* Column headings (Hour, Air, RH, Wind...) */
.utci-table th {
background: #f0e4c4;
color: #6b4f2a;
font-family: JetBrains Mono, monospace;
font-size: 10px;
text-transform: uppercase;
letter-spacing: 0.14em;
font-weight: 600;
padding: 14px 12px;
text-align: right;
white-space: nowrap;
position: sticky;
top: 0; /* sticks to the top while scrolling */
border-bottom: 2px solid #c9b08a;
}
/* The Hour column aligns left, the rest align right */
.utci-table th:first-child,
.utci-table td:first-child {
text-align: left;
}
/* The "°C" / "m/s" etc. unit underneath each heading */
.utci-table th .col-unit {
display: block;
color: #c8922a;
font-size: 9px;
margin-top: 2px;
}
.utci-table tbody tr {
border-bottom: 1px solid #ede4cc;
transition: background 0.1s;
}
.utci-table tbody tr:hover {
background: #fef8ea;
}
.utci-table td {
padding: 10px 12px;
text-align: right;
font-family: JetBrains Mono, monospace;
font-variant-numeric: tabular-nums; /* stops digits jiggling between rows */
white-space: nowrap;
color: #4a3420;
}
/* ── 8. NOW-ROW & NIGHT-ROW DECORATIONS ─────────────────────────────── */
/* "Currently this hour" — the highlighted row */
.utci-table tbody tr.is-now {
background: #fff8e4 !important;
box-shadow: inset 3px 0 #c8922a; /* brass stripe down the left */
}
.utci-table tbody tr.is-now td {
color: #1e1208;
}
/* The little brass pip in the time cell of the current hour */
.now-pip {
display: inline-block;
width: 6px;
height: 6px;
border-radius: 50%;
background: #c8922a;
margin-right: 7px;
vertical-align: middle;
box-shadow: 0 0 8px #c8922a73;
}
/* Night-time hours get a slightly muted text colour */
.utci-table tbody tr.is-night td {
color: #c0a880;
}
/* The time cell — uses the display serif instead of monospace */
.utci-time {
font-family: Fraunces, serif !important;
font-weight: 500;
font-size: 16px;
color: #1e1208 !important;
}
/* The coloured pill inside UTCI / UTCI+P cells.
The pill's BACKGROUND comes from inline styles in sunscope.js
(the utciCategory() function decides which thermal-stress colour
to apply). This rule just handles the pill shape. */
.utci-cell {
display: inline-block;
padding: 4px 12px;
border-radius: 3px;
font-weight: 600;
min-width: 60px;
text-align: center;
font-size: 14px;
}
.utci-band-label {
font-family: JetBrains Mono, monospace;
font-size: 10px;
text-transform: uppercase;
letter-spacing: 0.08em;
}
/* ── 9. STATUS & ERROR BANNERS ("Acquiring forecast data…") ────────── */
.utci-status {
padding: 14px 18px;
background: #f0e4c4;
color: #7a5c2a;
font-family: JetBrains Mono, monospace;
font-size: 11px;
text-align: center;
letter-spacing: 0.12em;
text-transform: uppercase;
border: 1.5px solid #c9b08a;
margin-bottom: 18px;
}
/* ── 10. LEGEND (thermal-stress band colours at the bottom) ────────── */
.utci-legend {
margin-top: 22px;
padding: 18px 20px;
background: #fdf8ee;
border: 1.5px solid #c9b08a;
}
.utci-legend-label {
font-family: JetBrains Mono, monospace;
font-size: 10px;
text-transform: uppercase;
letter-spacing: 0.18em;
color: #b09870;
margin-bottom: 12px;
display: block;
font-weight: 600;
}
.utci-legend-row {
display: flex;
flex-wrap: wrap;
gap: 4px;
}
.utci-legend-item {
padding: 6px 12px;
font-family: JetBrains Mono, monospace;
font-size: 10px;
text-transform: uppercase;
letter-spacing: 0.06em;
flex: 1;
min-width: 110px;
text-align: center;
opacity: 0.9;
}
/* ── 11. ABOUT + FOOTER ─────────────────────────────────────────────── */
.utci-about {
margin-top: 28px;
padding: 24px 28px;
background: #fdf8ee;
border: 1.5px solid #c9b08a;
}
.utci-about-heading {
font-family: Fraunces, serif;
font-size: 18px;
font-weight: 700;
color: #1e1208;
margin-bottom: 14px;
letter-spacing: -0.01em;
}
.utci-about-text {
font-family: Manrope, sans-serif;
font-size: 14px;
line-height: 1.75;
color: #4a3420;
margin-bottom: 12px;
max-width: 860px; /* keeps line length readable */
}
.utci-about-text:last-child {
margin-bottom: 0;
}
.utci-about-text strong {
color: #1e1208;
font-weight: 600;
}
.utci-about-text em {
font-style: italic;
color: #6b4f2a;
}
.utci-footer {
margin-top: 36px;
padding-top: 20px;
border-top: 1px solid #d4c0a0;
font-family: JetBrains Mono, monospace;
font-size: 10px;
text-transform: uppercase;
letter-spacing: 0.12em;
color: #c0a880;
line-height: 2.2;
}
/* The "Reading the table." intro snippet */
.utci-footer em {
font-family: Fraunces, serif;
font-style: italic;
text-transform: none;
letter-spacing: 0;
font-size: 14px;
color: #7a5c2a;
}
/* ── 12. RESPONSIVE (mobile) ───────────────────────────────────────── */
/* On screens narrower than 800px, stack the header vertically and
shrink the dial. Add more rules in this block to tweak mobile
layout further. */
@media (max-width: 800px) {
.utci-header {
grid-template-columns: 1fr; /* stack the 3 header columns */
text-align: center;
}
.header-right {
align-items: center;
}
.utci-search-wrap {
width: 100%;
}
.scope-ring {
width: 180px; /* smaller dial on mobile */
height: 180px;
margin: 0 auto;
}
}
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import{options as n}from"./preact.js";var t,r,u,i,o=0,f=[],c=[],e=n,a=e.__b,v=e.__r,l=e.diffed,m=e.__c,s=e.unmount,d=e.__;function h(n,t){e.__h&&e.__h(r,n,o||t),o=0;var u=r.__H||(r.__H={__:[],__h:[]});return n>=u.__.length&&u.__.push({__V:c}),u.__[n]}function p(n){return o=1,y(D,n)}function y(n,u,i){var o=h(t++,2);if(o.t=n,!o.__c&&(o.__=[i?i(u):D(void 0,u),function(n){var t=o.__N?o.__N[0]:o.__[0],r=o.t(t,n);t!==r&&(o.__N=[r,o.__[1]],o.__c.setState({}))}],o.__c=r,!r.u)){var f=function(n,t,r){if(!o.__c.__H)return!0;var u=o.__c.__H.__.filter(function(n){return!!n.__c});if(u.every(function(n){return!n.__N}))return!c||c.call(this,n,t,r);var i=!1;return u.forEach(function(n){if(n.__N){var t=n.__[0];n.__=n.__N,n.__N=void 0,t!==n.__[0]&&(i=!0)}}),!(!i&&o.__c.props===n)&&(!c||c.call(this,n,t,r))};r.u=!0;var c=r.shouldComponentUpdate,e=r.componentWillUpdate;r.componentWillUpdate=function(n,t,r){if(this.__e){var u=c;c=void 0,f(n,t,r),c=u}e&&e.call(this,n,t,r)},r.shouldComponentUpdate=f}return o.__N||o.__}function _(n,u){var i=h(t++,3);!e.__s&&C(i.__H,u)&&(i.__=n,i.i=u,r.__H.__h.push(i))}function A(n,u){var i=h(t++,4);!e.__s&&C(i.__H,u)&&(i.__=n,i.i=u,r.__h.push(i))}function F(n){return o=5,q(function(){return{current:n}},[])}function T(n,t,r){o=6,A(function(){return"function"==typeof n?(n(t()),function(){return n(null)}):n?(n.current=t(),function(){return n.current=null}):void 0},null==r?r:r.concat(n))}function q(n,r){var u=h(t++,7);return C(u.__H,r)?(u.__V=n(),u.i=r,u.__h=n,u.__V):u.__}function x(n,t){return o=8,q(function(){return n},t)}function P(n){var u=r.context[n.__c],i=h(t++,9);return i.c=n,u?(null==i.__&&(i.__=!0,u.sub(r)),u.props.value):n.__}function V(n,t){e.useDebugValue&&e.useDebugValue(t?t(n):n)}function b(n){var u=h(t++,10),i=p();return u.__=n,r.componentDidCatch||(r.componentDidCatch=function(n,t){u.__&&u.__(n,t),i[1](n)}),[i[0],function(){i[1](void 0)}]}function g(){var n=h(t++,11);if(!n.__){for(var u=r.__v;null!==u&&!u.__m&&null!==u.__;)u=u.__;var i=u.__m||(u.__m=[0,0]);n.__="P"+i[0]+"-"+i[1]++}return n.__}function j(){for(var n;n=f.shift();)if(n.__P&&n.__H)try{n.__H.__h.forEach(z),n.__H.__h.forEach(B),n.__H.__h=[]}catch(t){n.__H.__h=[],e.__e(t,n.__v)}}e.__b=function(n){r=null,a&&a(n)},e.__=function(n,t){n&&t.__k&&t.__k.__m&&(n.__m=t.__k.__m),d&&d(n,t)},e.__r=function(n){v&&v(n),t=0;var i=(r=n.__c).__H;i&&(u===r?(i.__h=[],r.__h=[],i.__.forEach(function(n){n.__N&&(n.__=n.__N),n.__V=c,n.__N=n.i=void 0})):(i.__h.forEach(z),i.__h.forEach(B),i.__h=[],t=0)),u=r},e.diffed=function(n){l&&l(n);var t=n.__c;t&&t.__H&&(t.__H.__h.length&&(1!==f.push(t)&&i===e.requestAnimationFrame||((i=e.requestAnimationFrame)||w)(j)),t.__H.__.forEach(function(n){n.i&&(n.__H=n.i),n.__V!==c&&(n.__=n.__V),n.i=void 0,n.__V=c})),u=r=null},e.__c=function(n,t){t.some(function(n){try{n.__h.forEach(z),n.__h=n.__h.filter(function(n){return!n.__||B(n)})}catch(r){t.some(function(n){n.__h&&(n.__h=[])}),t=[],e.__e(r,n.__v)}}),m&&m(n,t)},e.unmount=function(n){s&&s(n);var t,r=n.__c;r&&r.__H&&(r.__H.__.forEach(function(n){try{z(n)}catch(n){t=n}}),r.__H=void 0,t&&e.__e(t,r.__v))};var k="function"==typeof requestAnimationFrame;function w(n){var t,r=function(){clearTimeout(u),k&&cancelAnimationFrame(t),setTimeout(n)},u=setTimeout(r,100);k&&(t=requestAnimationFrame(r))}function z(n){var t=r,u=n.__c;"function"==typeof u&&(n.__c=void 0,u()),r=t}function B(n){var t=r;n.__c=n.__(),r=t}function C(n,t){return!n||n.length!==t.length||t.some(function(t,r){return t!==n[r]})}function D(n,t){return"function"==typeof t?t(n):t}export{x as useCallback,P as useContext,V as useDebugValue,_ as useEffect,b as useErrorBoundary,g as useId,T as useImperativeHandle,A as useLayoutEffect,q as useMemo,y as useReducer,F as useRef,p as useState};
//# sourceMappingURL=hooks.module.js.map
assets/vendor/preact.js
Vendored
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index.html
+2 -2
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<meta name="description" content="SunScope - UTCI weather forecast showing real thermal comfort, not just air temperature." />
<title>SunScope · The True Temperature</title>
<link rel="icon" type="image/svg+xml" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='.9em' font-size='90'>☀️</text></svg>" />
<link rel="stylesheet" crossorigin href="./assets/index-CD_5RYSA.css">
<script type="module" crossorigin src="./assets/index-cxJ3Sbx3.js"></script>
<link rel="stylesheet" href="./assets/sunscope.css?v=14d-local9">
</head>
<body>
<div id="root"></div>
<script type="module" src="./assets/sunscope.js?v=14d-local9"></script>
</body>
</html>
utci-forecast.jsx
-874
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@@ -1,874 +0,0 @@
import { useState, useEffect, useRef } from 'preact/hooks';
import './styles.css';
// ═══════════════════════════════════════════════════════════════════
// PHYSICAL CONSTANTS
// ═══════════════════════════════════════════════════════════════════
const SIGMA = 5.670374419e-8;
const EPSILON_P = 0.97;
const A_K = 0.7;
const ALBEDO_GRASS = 0.23;
// ═══════════════════════════════════════════════════════════════════
// VAPOR PRESSURE (Magnus formula → hPa)
// ═══════════════════════════════════════════════════════════════════
function vaporPressureHpa(Ta, RH) {
const es = 6.105 * Math.exp((17.27 * Ta) / (237.7 + Ta));
return es * (RH / 100);
}
// ═══════════════════════════════════════════════════════════════════
// SOLAR POSITION (NOAA simplified; returns elevation in degrees)
// ═══════════════════════════════════════════════════════════════════
function solarElevationDeg(lat, lon, dateUTC) {
const start = Date.UTC(dateUTC.getUTCFullYear(), 0, 0);
const diff = dateUTC - start;
const DOY = Math.floor(diff / 86400000);
const hourUTC =
dateUTC.getUTCHours() +
dateUTC.getUTCMinutes() / 60 +
dateUTC.getUTCSeconds() / 3600;
const gamma = ((2 * Math.PI) / 365) * (DOY - 1 + (hourUTC - 12) / 24);
const eqtime =
229.18 *
(0.000075 +
0.001868 * Math.cos(gamma) -
0.032077 * Math.sin(gamma) -
0.014615 * Math.cos(2 * gamma) -
0.040849 * Math.sin(2 * gamma));
const decl =
0.006918 -
0.399912 * Math.cos(gamma) +
0.070257 * Math.sin(gamma) -
0.006758 * Math.cos(2 * gamma) +
0.000907 * Math.sin(2 * gamma) -
0.002697 * Math.cos(3 * gamma) +
0.00148 * Math.sin(3 * gamma);
const timeOffset = eqtime + 4 * lon;
const tst = hourUTC * 60 + timeOffset;
const ha = (((tst / 4) - 180) * Math.PI) / 180;
const latRad = (lat * Math.PI) / 180;
const cosZenith =
Math.sin(latRad) * Math.sin(decl) +
Math.cos(latRad) * Math.cos(decl) * Math.cos(ha);
const zenith = Math.acos(Math.max(-1, Math.min(1, cosZenith)));
return (Math.PI / 2 - zenith) * (180 / Math.PI);
}
// ═══════════════════════════════════════════════════════════════════
// MEAN RADIANT TEMPERATURE
// ═══════════════════════════════════════════════════════════════════
function calcTmrt(Ta, dirRad, diffRad, globalRad, solElev) {
const TaK = Ta + 273.15;
let fp = 0;
if (solElev > 0) {
const h = solElev;
fp = 0.308 * Math.cos((Math.PI / 180) * h * (0.998 - (h * h) / 50000));
}
let DNI = 0;
if (solElev > 1) {
DNI = dirRad / Math.sin((solElev * Math.PI) / 180);
DNI = Math.min(DNI, 1100);
}
const Sshort = A_K * (fp * DNI + 0.5 * diffRad + 0.5 * ALBEDO_GRASS * globalRad);
const Slong = EPSILON_P * SIGMA * Math.pow(TaK, 4);
const TmrtK = Math.pow((Sshort + Slong) / (EPSILON_P * SIGMA), 0.25);
return TmrtK - 273.15;
}
// ═══════════════════════════════════════════════════════════════════
// UTCI POLYNOMIAL APPROXIMATION (Bröde et al. 2012, 210 terms)
// ═══════════════════════════════════════════════════════════════════
function utciApprox(Ta, Tmrt, va10, ehPa) {
const va = Math.max(0.5, Math.min(17, va10));
const D_Tmrt = Tmrt - Ta;
const Pa = ehPa / 10;
const T = Ta, V = va, D = D_Tmrt, P = Pa;
const T2=T*T, T3=T2*T, T4=T3*T, T5=T4*T, T6=T5*T;
const V2=V*V, V3=V2*V, V4=V3*V, V5=V4*V, V6=V5*V;
const D2=D*D, D3=D2*D, D4=D3*D, D5=D4*D, D6=D5*D;
const P2=P*P, P3=P2*P, P4=P3*P, P5=P4*P, P6=P5*P;
return T +
6.07562052e-1 +
-2.27712343e-2 * T +
8.06470249e-4 * T2 +
-1.54271372e-4 * T3 +
-3.24651735e-6 * T4 +
7.32602852e-8 * T5 +
1.35959073e-9 * T6 +
-2.25836520e0 * V +
8.80326035e-2 * T*V +
2.16844454e-3 * T2*V +
-1.53347087e-5 * T3*V +
-5.72983704e-7 * T4*V +
-2.55090145e-9 * T5*V +
-7.51269505e-1 * V2 +
-4.08350271e-3 * T*V2 +
-5.21670675e-5 * T2*V2 +
1.94544667e-6 * T3*V2 +
1.14099531e-8 * T4*V2 +
1.58137256e-1 * V3 +
-6.57263143e-5 * T*V3 +
2.22697524e-7 * T2*V3 +
-4.16117031e-8 * T3*V3 +
-1.27762753e-2 * V4 +
9.66891875e-6 * T*V4 +
2.52785852e-9 * T2*V4 +
4.56306672e-4 * V5 +
-1.74202546e-7 * T*V5 +
-5.91491269e-6 * V6 +
3.98374029e-1 * D +
1.83945314e-4 * T*D +
-1.73754510e-4 * T2*D +
-7.60781159e-7 * T3*D +
3.77830287e-8 * T4*D +
5.43079673e-10* T5*D +
-2.00518269e-2 * V*D +
8.92859837e-4 * T*V*D +
3.45433048e-6 * T2*V*D +
-3.77925774e-7 * T3*V*D +
-1.69699377e-9 * T4*V*D +
1.69992415e-4 * V2*D +
-4.99204314e-5 * T*V2*D +
2.47417178e-7 * T2*V2*D +
1.07596466e-8 * T3*V2*D +
8.49242932e-5 * V3*D +
1.35191328e-6 * T*V3*D +
-6.21531254e-9 * T2*V3*D +
-4.99410301e-6 * V4*D +
-1.89489258e-8 * T*V4*D +
8.15300114e-8 * V5*D +
7.55043090e-4 * D2 +
-5.65095215e-5 * T*D2 +
-4.52166564e-7 * T2*D2 +
2.46688878e-8 * T3*D2 +
2.42674348e-10* T4*D2 +
1.54547250e-4 * V*D2 +
5.24110970e-6 * T*V*D2 +
-8.75874982e-8 * T2*V*D2 +
-1.50743064e-9 * T3*V*D2 +
-1.56236307e-5 * V2*D2 +
-1.33895614e-7 * T*V2*D2 +
2.49709824e-9 * T2*V2*D2 +
6.51711721e-7 * V3*D2 +
1.94960053e-9 * T*V3*D2 +
-1.00361113e-8 * V4*D2 +
-1.21206673e-5 * D3 +
-2.18203660e-7 * T*D3 +
7.51269482e-9 * T2*D3 +
9.79063848e-11* T3*D3 +
1.25006734e-6 * V*D3 +
-1.81584736e-9 * T*V*D3 +
-3.52197671e-10* T2*V*D3 +
-3.36514630e-8 * V2*D3 +
1.35908359e-10* T*V2*D3 +
4.17032620e-10* V3*D3 +
-1.30369025e-9 * D4 +
4.13908461e-10* T*D4 +
9.22652254e-12* T2*D4 +
-5.08220384e-9 * V*D4 +
-2.24730961e-11* T*V*D4 +
1.17139133e-10* V2*D4 +
6.62154879e-10* D5 +
4.03863260e-13* T*D5 +
1.95087203e-12* V*D5 +
-4.73602469e-12* D6 +
5.12733497e0 * P +
-3.12788561e-1 * T*P +
-1.96701861e-2 * T2*P +
9.99690870e-4 * T3*P +
9.51738512e-6 * T4*P +
-4.66426341e-7 * T5*P +
5.48050612e-1 * V*P +
-3.30552823e-3 * T*V*P +
-1.64119440e-3 * T2*V*P +
-5.16670694e-6 * T3*V*P +
9.52692432e-7 * T4*V*P +
-4.29223622e-2 * V2*P +
5.00845667e-3 * T*V2*P +
1.00601257e-6 * T2*V2*P +
-1.81748644e-6 * T3*V2*P +
-1.25813502e-3 * V3*P +
-1.79330391e-4 * T*V3*P +
2.34994441e-6 * T2*V3*P +
1.29735808e-4 * V4*P +
1.29064870e-6 * T*V4*P +
-2.28558686e-6 * V5*P +
-3.69476348e-2 * D*P +
1.62325322e-3 * T*D*P +
-3.14279680e-5 * T2*D*P +
2.59835559e-6 * T3*D*P +
-4.77136523e-8 * T4*D*P +
8.64203390e-3 * V*D*P +
-6.87405181e-4 * T*V*D*P +
-9.13863872e-6 * T2*V*D*P +
5.15916806e-7 * T3*V*D*P +
-3.59217476e-5 * V2*D*P +
3.28696511e-5 * T*V2*D*P +
-7.10542454e-7 * T2*V2*D*P +
-1.24382300e-5 * V3*D*P +
-7.38584400e-9 * T*V3*D*P +
2.20609296e-7 * V4*D*P +
-7.32469180e-4 * D2*P +
-1.87381964e-5 * T*D2*P +
4.80925239e-6 * T2*D2*P +
-8.75492040e-8 * T3*D2*P +
2.77862930e-5 * V*D2*P +
-5.06004592e-6 * T*V*D2*P +
1.14325367e-7 * T2*V*D2*P +
2.53016723e-6 * V2*D2*P +
-1.72857035e-8 * T*V2*D2*P +
-3.95079398e-8 * V3*D2*P +
-3.59413173e-7 * D3*P +
7.04388046e-7 * T*D3*P +
-1.89309167e-8 * T2*D3*P +
-4.79768731e-7 * V*D3*P +
7.96079978e-9 * T*V*D3*P +
1.62897058e-9 * V2*D3*P +
3.94367674e-8 * D4*P +
-1.18566247e-9 * T*D4*P +
3.34678041e-10* V*D4*P +
-1.15606447e-10* D5*P +
-2.80626406e0 * P2 +
5.48712484e-1 * T*P2 +
-3.99428410e-3 * T2*P2 +
-9.54009191e-4 * T3*P2 +
1.93090978e-5 * T4*P2 +
-3.08806365e-1 * V*P2 +
1.16952364e-2 * T*V*P2 +
4.95271903e-4 * T2*V*P2 +
-1.90710882e-5 * T3*V*P2 +
2.10787756e-3 * V2*P2 +
-6.98445738e-4 * T*V2*P2 +
2.30109073e-5 * T2*V2*P2 +
4.17856590e-4 * V3*P2 +
-1.27043871e-5 * T*V3*P2 +
-3.04620472e-6 * V4*P2 +
5.14507424e-2 * D*P2 +
-4.32510997e-3 * T*D*P2 +
8.99281156e-5 * T2*D*P2 +
-7.14663943e-7 * T3*D*P2 +
-2.66016305e-4 * V*D*P2 +
2.63789586e-4 * T*V*D*P2 +
-7.01199003e-6 * T2*V*D*P2 +
-1.06823306e-4 * V2*D*P2 +
3.61341136e-6 * T*V2*D*P2 +
2.29748967e-7 * V3*D*P2 +
3.04788893e-4 * D2*P2 +
-6.42070836e-5 * T*D2*P2 +
1.16257971e-6 * T2*D2*P2 +
7.68023384e-6 * V*D2*P2 +
-5.47446896e-7 * T*V*D2*P2 +
-3.59937910e-8 * V2*D2*P2 +
-4.36497725e-6 * D3*P2 +
1.68737969e-7 * T*D3*P2 +
2.67489271e-8 * V*D3*P2 +
3.23926897e-9 * D4*P2 +
-3.53874123e-2 * P3 +
-2.21201190e-1 * T*P3 +
1.55126038e-2 * T2*P3 +
-2.63917279e-4 * T3*P3 +
4.53433455e-2 * V*P3 +
-4.32943862e-3 * T*V*P3 +
1.45389826e-4 * T2*V*P3 +
2.17508610e-4 * V2*P3 +
-6.66724702e-5 * T*V2*P3 +
3.33217140e-5 * V3*P3 +
-2.26921615e-3 * D*P3 +
3.80261982e-4 * T*D*P3 +
-5.45314314e-9 * T2*D*P3 +
-7.96355448e-4 * V*D*P3 +
2.53458034e-5 * T*V*D*P3 +
-6.31223658e-6 * V2*D*P3 +
3.02122035e-4 * D2*P3 +
-4.77403547e-6 * T*D2*P3 +
1.73825715e-6 * V*D2*P3 +
-4.09087898e-7 * D3*P3 +
6.14155345e-1 * P4 +
-6.16755931e-2 * T*P4 +
1.33374846e-3 * T2*P4 +
3.55375387e-3 * V*P4 +
-5.13027851e-4 * T*V*P4 +
1.02449757e-4 * V2*P4 +
-1.48526421e-3 * D*P4 +
-4.11469183e-5 * T*D*P4 +
-6.80434415e-6 * V*D*P4 +
-9.77675906e-6 * D2*P4 +
8.82773108e-2 * P5 +
-3.01859306e-3 * T*P5 +
1.04452989e-3 * V*P5 +
2.47090539e-4 * D*P5 +
1.48348065e-3 * P6;
}
// ═══════════════════════════════════════════════════════════════════
// UTCI STRESS BANDS
// ═══════════════════════════════════════════════════════════════════
function utciCategory(u) {
if (u < -40) return { label: 'Extreme cold', bg: '#1a1438', fg: '#fff' };
if (u < -27) return { label: 'Very strong cold', bg: '#23408f', fg: '#fff' };
if (u < -13) return { label: 'Arctic', bg: '#3f73c4', fg: '#fff' };
if (u < 0) return { label: 'Freezing', bg: '#7eb0e0', fg: '#1a1612' };
if (u < 9) return { label: 'Cold', bg: '#bcd9ec', fg: '#1a1612' };
if (u < 18) return { label: 'Chilled', bg: '#c8dcc0', fg: '#1a1612' };
if (u < 26) return { label: 'Comfortable', bg: '#6ab05a', fg: '#fff' };
if (u < 32) return { label: 'Moderate heat', bg: '#e8c547', fg: '#1a1612' };
if (u < 38) return { label: 'Strong heat', bg: '#dc8a3a', fg: '#1a1612' };
if (u < 46) return { label: 'Very strong heat', bg: '#c44a3a', fg: '#fff' };
return { label: 'Extreme heat', bg: '#7a1a1a', fg: '#fff' };
}
// ═══════════════════════════════════════════════════════════════════
// SCOPE RETICLE — shows current UTCI like a precision instrument
// (uses only basic SVG primitives for maximum compatibility)
// ═══════════════════════════════════════════════════════════════════
function ScopeReticle({ value, cat, loading }) {
const cx = 100, cy = 100, R = 86;
// 36 tick marks around the ring
const ticks = Array.from({ length: 36 }, (_, i) => {
const deg = i * 10 - 90;
const rad = (deg * Math.PI) / 180;
const major = i % 9 === 0;
const medium = i % 3 === 0;
const r2 = major ? R - 14 : medium ? R - 8 : R - 4;
return {
x1: cx + R * Math.cos(rad), y1: cy + R * Math.sin(rad),
x2: cx + r2 * Math.cos(rad), y2: cy + r2 * Math.sin(rad),
major, medium,
};
});
// Stress band arc segments: UTCI -40..50 → 135°..405° (270° sweep)
const stressBands = [
{ min: -40, max: -27, color: '#23408f' },
{ min: -27, max: -13, color: '#3f73c4' },
{ min: -13, max: 0, color: '#7eb0e0' },
{ min: 0, max: 9, color: '#bcd9ec' },
{ min: 9, max: 18, color: '#c8dcc0' },
{ min: 18, max: 26, color: '#6ab05a' },
{ min: 26, max: 32, color: '#e8c547' },
{ min: 32, max: 38, color: '#dc8a3a' },
{ min: 38, max: 46, color: '#c44a3a' },
{ min: 46, max: 50, color: '#7a1a1a' },
];
function fracToXY(frac, r) {
const deg = 135 + frac * 270;
const rad = (deg * Math.PI) / 180;
return [cx + r * Math.cos(rad), cy + r * Math.sin(rad)];
}
function bandArcPath(band) {
const f1 = Math.min(1, Math.max(0, (band.min + 10) / 60));
const f2 = Math.min(1, Math.max(0, (band.max + 10) / 60));
const arcR = R - 18;
const [x1, y1] = fracToXY(f1, arcR);
const [x2, y2] = fracToXY(f2, arcR);
const large = (f2 - f1) * 270 > 180 ? 1 : 0;
return `M ${x1} ${y1} A ${arcR} ${arcR} 0 ${large} 1 ${x2} ${y2}`;
}
// Needle position
let needleX = cx, needleY = cy + 54;
if (value != null) {
const frac = Math.min(1, Math.max(0, (value + 10) / 60));
const deg = 135 + frac * 270;
const rad = (deg * Math.PI) / 180;
needleX = cx + 54 * Math.cos(rad);
needleY = cy + 54 * Math.sin(rad);
}
const glowColor = cat ? cat.bg : '#c8922a';
return (
<svg viewBox="0 0 200 200" className="scope-ring" aria-label="Current UTCI scope readout">
<defs>
<radialGradient id="scope-bg-glow" cx="50%" cy="50%" r="50%">
<stop offset="0%" stop-color={glowColor} stop-opacity="0.12" />
<stop offset="100%" stop-color={glowColor} stop-opacity="0" />
</radialGradient>
</defs>
{/* Ambient glow */}
<circle cx={cx} cy={cy} r="96" fill="url(#scope-bg-glow)" />
{/* Stress band arcs */}
{stressBands.map((b, i) => (
<path key={i} d={bandArcPath(b)} fill="none"
stroke={b.color} stroke-width="4" opacity="0.4" stroke-linecap="butt" />
))}
{/* Outer ring */}
<circle cx={cx} cy={cy} r={R} fill="none" stroke="#c9b08a" stroke-width="1.5" />
{/* Tick marks */}
{ticks.map((t, i) => (
<line key={i} x1={t.x1} y1={t.y1} x2={t.x2} y2={t.y2}
stroke={t.major ? '#c8922a' : t.medium ? '#c9b08a' : '#e0d0b0'}
stroke-width={t.major ? 1.5 : 0.75}
/>
))}
{/* Crosshair lines */}
<line x1={cx - R + 3} y1={cy} x2={cx - 32} y2={cy} stroke="#d4b896" stroke-width="0.75" />
<line x1={cx + 32} y1={cy} x2={cx + R - 3} y2={cy} stroke="#d4b896" stroke-width="0.75" />
<line x1={cx} y1={cy - R + 3} x2={cx} y2={cy - 32} stroke="#d4b896" stroke-width="0.75" />
<line x1={cx} y1={cy + 32} x2={cx} y2={cy + R - 3} stroke="#d4b896" stroke-width="0.75" />
{/* Inner rings */}
<circle cx={cx} cy={cy} r="58" fill="none" stroke="#e8d8c0" stroke-width="0.75" />
<circle cx={cx} cy={cy} r="32" fill="none" stroke="#e8d8c0" stroke-width="0.5" />
{/* Corner bracket markers */}
{[[-1,-1],[1,-1],[-1,1],[1,1]].map(([sx, sy], i) => (
<g key={i}>
<line x1={cx + sx*72} y1={cy + sy*72} x2={cx + sx*60} y2={cy + sy*72}
stroke="#c9b08a" stroke-width="1" />
<line x1={cx + sx*72} y1={cy + sy*72} x2={cx + sx*72} y2={cy + sy*60}
stroke="#c9b08a" stroke-width="1" />
</g>
))}
{/* Needle */}
{value != null && (
<>
<line x1={cx} y1={cy} x2={needleX} y2={needleY}
stroke="#c8922a" stroke-width="3" stroke-linecap="round" opacity="0.18" />
<line x1={cx} y1={cy} x2={needleX} y2={needleY}
stroke="#c8922a" stroke-width="1.5" stroke-linecap="round" opacity="0.95" />
</>
)}
{/* Centre pivot */}
<circle cx={cx} cy={cy} r="5.5" fill="#f5edd6" stroke="#c8922a" stroke-width="1.5" />
<circle cx={cx} cy={cy} r="2.5" fill="#c8922a" />
{/* Readout text */}
{loading ? (
<text x={cx} y={cy + 5} text-anchor="middle"
fill="#b09870" font-size="11" font-family="monospace">· · ·</text>
) : value != null ? (
<>
<text x={cx} y={cy - 8} text-anchor="middle"
fill="#1e1208" font-size="26"
font-family="Fraunces, serif" font-weight="700">
{value.toFixed(1)}°
</text>
<text x={cx} y={cy + 7} text-anchor="middle"
fill="#9a7d5a" font-size="6.5"
font-family="JetBrains Mono, monospace" letter-spacing="2">
UTCI NOW
</text>
<text x={cx} y={cy + 19} text-anchor="middle"
fill={glowColor} font-size="7"
font-family="JetBrains Mono, monospace" letter-spacing="0.8">
{cat.label.toUpperCase()}
</text>
</>
) : (
<text x={cx} y={cy + 5} text-anchor="middle"
fill="#b09870" font-size="8"
font-family="JetBrains Mono, monospace" letter-spacing="1.2">
AWAITING
</text>
)}
</svg>
);
}
// ═══════════════════════════════════════════════════════════════════
// MAIN COMPONENT
// ═══════════════════════════════════════════════════════════════════
// ═══════════════════════════════════════════════════════════════════
// PRECIPITATION PENALTY (applied on top of UTCI)
// Rain → evaporative + wet-clothing cooling, amplified by wind
// Snow → heavier conductive penalty on top of any rain
// ═══════════════════════════════════════════════════════════════════
function precipPenalty(precipMm, snowCmH, windMs) {
let penalty = 0;
if (precipMm > 0) {
// Scales: drizzle 0.1mm→-1.2°, moderate 2mm→-3.8°, heavy 8mm→-6.5°
const base = Math.min(7, 1.4 * Math.pow(precipMm, 0.55) + precipMm * 0.28);
// Wind amplifies wet chill (up to +35% at gale force)
const windMult = 1 + Math.min(0.35, windMs * 0.025);
penalty += base * windMult;
}
if (snowCmH > 0) {
// Snow adds extra penalty on top (wet snow especially brutal)
penalty += Math.min(6, 2.2 + snowCmH * 1.6);
}
return -Math.round(penalty * 10) / 10;
}
export default function UTCIForecast() {
const [location, setLocation] = useState({
name: 'Pangbourne, Berkshire',
lat: 51.4839,
lon: -1.0725,
country: 'GB',
});
const [forecast, setForecast] = useState(null);
const [loading, setLoading] = useState(false);
const [error, setError] = useState(null);
const [searchQuery, setSearchQuery] = useState('');
const [searchResults, setSearchResults] = useState([]);
const [searching, setSearching] = useState(false);
const [selectedDay, setSelectedDay] = useState(0);
const [visibleCols, setVisibleCols] = useState({
hour: true, air: true, rh: true, wind: true,
cloud: false, sun: false, direct: false, diffuse: false,
tmrt: false, delta: false, utci: false, utciP: true,
precip: true,
});
const toggleCol = (col) => setVisibleCols(prev => ({ ...prev, [col]: !prev[col] }));
const searchTimeout = useRef(null);
// Geocoding search
useEffect(() => {
if (searchQuery.length < 2) { setSearchResults([]); return; }
if (searchTimeout.current) clearTimeout(searchTimeout.current);
searchTimeout.current = setTimeout(async () => {
setSearching(true);
try {
const r = await fetch(
`https://geocoding-api.open-meteo.com/v1/search?name=${encodeURIComponent(searchQuery)}&count=6&language=en&format=json`
);
const j = await r.json();
setSearchResults(j.results || []);
} catch { setSearchResults([]); }
finally { setSearching(false); }
}, 300);
}, [searchQuery]);
// Forecast fetch
useEffect(() => {
async function load() {
setLoading(true); setError(null);
try {
const url =
`https://api.open-meteo.com/v1/forecast` +
`?latitude=${location.lat}&longitude=${location.lon}` +
`&hourly=temperature_2m,relative_humidity_2m,wind_speed_10m,` +
`direct_radiation,diffuse_radiation,shortwave_radiation,cloud_cover,` +
`precipitation,snowfall` +
`&wind_speed_unit=ms&timezone=auto&forecast_days=3`;
const r = await fetch(url);
if (!r.ok) throw new Error(`Open-Meteo HTTP ${r.status}`);
setForecast(await r.json());
} catch (e) { setError(e.message); }
finally { setLoading(false); }
}
load();
}, [location]);
// Compute hourly rows
const hourlyRows = forecast ? forecast.hourly.time.map((iso, i) => {
const Ta = forecast.hourly.temperature_2m[i];
const RH = forecast.hourly.relative_humidity_2m[i];
const va = forecast.hourly.wind_speed_10m[i];
const dir = forecast.hourly.direct_radiation[i] || 0;
const dif = forecast.hourly.diffuse_radiation[i] || 0;
const glob = forecast.hourly.shortwave_radiation[i] || 0;
const cc = forecast.hourly.cloud_cover[i];
const precip = forecast.hourly.precipitation[i] || 0;
const snow = forecast.hourly.snowfall[i] || 0;
const dt = new Date(iso);
const elev = solarElevationDeg(location.lat, location.lon, dt);
const eh = vaporPressureHpa(Ta, RH);
const Tmrt = calcTmrt(Ta, dir, dif, glob, elev);
const utci = utciApprox(Ta, Tmrt, va, eh);
const utciAdj = utci + precipPenalty(precip, snow, va);
return { iso, dt, Ta, RH, va, dir, dif, glob, cc, precip, snow, elev, Tmrt, utci, utciAdj, eh };
}) : [];
// Group by day
const days = [];
hourlyRows.forEach(row => {
const key = row.iso.slice(0, 10);
let day = days.find(d => d.key === key);
if (!day) { day = { key, date: new Date(row.iso), rows: [] }; days.push(day); }
day.rows.push(row);
});
const visible = days[selectedDay]?.rows || [];
// Current moment — for reticle + row highlight
const now = new Date();
const currentRow = hourlyRows.length > 0
? (hourlyRows.find(row =>
now.toDateString() === row.dt.toDateString() &&
now.getHours() === row.dt.getHours()
) ?? hourlyRows.reduce((best, row) =>
Math.abs(row.dt - now) < Math.abs(best.dt - now) ? row : best))
: null;
const currentCat = currentRow
? utciCategory(currentRow.utciAdj)
: { bg: '#4a4228', fg: '#ede4cc', label: 'No data' };
return (
<div className="utci-app">
<nav className="utci-topnav">
<a href="./index.html">Home</a>
<a href="./about.html">About</a>
</nav>
<div className="lens-bloom-a" />
<div className="lens-bloom-b" />
<div className="utci-shell">
<div className="utci-header">
<div>
<h1 className="utci-title"><span className="title-sun">SUN</span><span className="title-scope">Scope</span> <sub className="title-beta">beta</sub></h1>
<div className="utci-tagline">See the sun the way your body does.</div>
<div className="utci-subtitle"><a href="https://utci.org/" target="_blank" rel="noopener noreferrer" className="utci-subtitle-link">Universal Thermal Climate Index</a> · Bröde 2012 · Open-Meteo · SunScope soak-factor</div>
<div className="utci-current-loc">
↳ {location.name}
<span className="utci-loc-coords">
{location.lat.toFixed(3)}°, {location.lon.toFixed(3)}°
</span>
</div>
</div>
<div>
<ScopeReticle
value={currentRow?.utciAdj ?? null}
cat={currentCat}
loading={loading}
/>
</div>
<div className="header-right">
<div className="utci-search-wrap">
<label className="utci-search-label">Change location</label>
<input
className="utci-search"
type="text"
placeholder="Search any town or city…"
value={searchQuery}
onChange={(e) => setSearchQuery(e.target.value)}
/>
{searchResults.length > 0 && (
<div className="utci-results">
{searchResults.map((r) => (
<div
key={`${r.id}-${r.latitude}`}
className="utci-result"
onClick={() => {
setLocation({
name: `${r.name}${r.admin1 ? ', ' + r.admin1 : ''}`,
lat: r.latitude,
lon: r.longitude,
country: r.country_code,
});
setSearchQuery('');
setSearchResults([]);
setSelectedDay(0);
}}
>
<div>{r.name}{r.admin1 ? `, ${r.admin1}` : ''}</div>
<div className="utci-result-meta">
{r.country} · {r.latitude.toFixed(2)}°, {r.longitude.toFixed(2)}°
</div>
</div>
))}
</div>
)}
{searching && <div className="utci-searching">Searching…</div>}
</div>
</div>
</div>
{error && (
<div className="utci-status" style={{ borderColor: '#3a1010', color: '#c44a3a' }}>
⚠ {error}
</div>
)}
{loading && !error && (
<div className="utci-status">Acquiring forecast data…</div>
)}
{forecast && days.length > 0 && (
<>
<div className="utci-day-tabs">
{days.map((d, i) => (
<button
key={d.key}
className={`utci-day-tab ${i === selectedDay ? 'active' : ''}`}
onClick={() => setSelectedDay(i)}
>
{i === 0 ? 'Today' : i === 1 ? 'Tomorrow' : 'Day after'}
<span className="utci-day-date">
{d.date.toLocaleDateString('en-GB', { weekday: 'long', day: 'numeric', month: 'short' })}
</span>
</button>
))}
</div>
<div className="col-toggles">
<span className="col-toggles-label">Columns:</span>
{[
{ key: 'hour', label: 'Hour' },
{ key: 'air', label: 'Air' },
{ key: 'rh', label: 'RH' },
{ key: 'wind', label: 'Wind' },
{ key: 'cloud', label: 'Cloud' },
{ key: 'sun', label: 'Sun' },
{ key: 'direct', label: 'Direct' },
{ key: 'diffuse', label: 'Diffuse' },
{ key: 'tmrt', label: 'Tmrt' },
{ key: 'delta', label: 'Δ' },
{ key: 'utci', label: 'UTCI' },
{ key: 'precip', label: 'Precip' },
{ key: 'utciP', label: 'UTCI+P' },
].map(c => (
<button
key={c.key}
className={`col-toggle${visibleCols[c.key] ? ' on' : ''}`}
onClick={() => toggleCol(c.key)}
>
{c.label}
</button>
))}
</div>
<div className="utci-table-wrap">
<table className="utci-table">
<thead>
<tr>
{visibleCols.hour && <th>Hour</th>}
{visibleCols.air && <th>Air <span className="col-unit">°C</span></th>}
{visibleCols.rh && <th>RH <span className="col-unit">%</span></th>}
{visibleCols.wind && <th>Wind <span className="col-unit">m/s</span></th>}
{visibleCols.cloud && <th>Cloud <span className="col-unit">%</span></th>}
{visibleCols.sun && <th>Sun <span className="col-unit">elev°</span></th>}
{visibleCols.direct && <th>Direct <span className="col-unit">W/m²</span></th>}
{visibleCols.diffuse && <th>Diffuse <span className="col-unit">W/m²</span></th>}
{visibleCols.tmrt && <th>Tmrt <span className="col-unit">°C</span></th>}
{visibleCols.delta && <th>Δ <span className="col-unit">UTCI−Air</span></th>}
{visibleCols.utci && <th>UTCI <span className="col-unit">°C felt</span></th>}
{visibleCols.precip && <th>Precip <span className="col-unit">mm/h</span></th>}
{visibleCols.utciP && <th>UTCI+P <span className="col-unit">°C adj.</span></th>}
</tr>
</thead>
<tbody>
{visible.map((r) => {
const cat = utciCategory(r.utci);
const isNight = r.elev < 0;
const isNow =
now.toDateString() === r.dt.toDateString() &&
now.getHours() === r.dt.getHours();
const delta = r.utci - r.Ta;
return (
<tr key={r.iso}
className={[isNight ? 'is-night' : '', isNow ? 'is-now' : ''].join(' ')}>
{visibleCols.hour && <td className="utci-time">
{isNow && <span className="now-pip" />}
{r.dt.toLocaleTimeString('en-GB', { hour: '2-digit', minute: '2-digit' })}
</td>}
{visibleCols.air && <td>{r.Ta.toFixed(1)}</td>}
{visibleCols.rh && <td>{Math.round(r.RH)}</td>}
{visibleCols.wind && <td>{r.va.toFixed(1)}</td>}
{visibleCols.cloud && <td>{Math.round(r.cc)}</td>}
{visibleCols.sun && <td>{r.elev > 0 ? r.elev.toFixed(1) : '—'}</td>}
{visibleCols.direct && <td>{Math.round(r.dir)}</td>}
{visibleCols.diffuse && <td>{Math.round(r.dif)}</td>}
{visibleCols.tmrt && <td>{r.Tmrt.toFixed(1)}</td>}
{visibleCols.delta && <td style={{
color: delta > 3 ? '#c8601a' : delta < -3 ? '#3f73c4' : '#9a7d5a',
fontWeight: 600,
}}>
{delta > 0 ? '+' : ''}{delta.toFixed(1)}
</td>}
{visibleCols.utci && <td>
<span className="utci-cell" style={{ background: cat.bg, color: cat.fg }}>
{r.utci.toFixed(1)}
</span>
</td>}
{visibleCols.precip && <td style={{ color: r.snow > 0 ? '#6090c8' : r.precip > 0 ? '#5090b0' : '#c0a880' }}>
{r.snow > 0 ? '❅ ' + r.snow.toFixed(1) + 'cm' : r.precip > 0 ? r.precip.toFixed(1) : '—'}
</td>}
{visibleCols.utciP && (() => {
const adjCat = utciCategory(r.utciAdj);
return <td style={{ background: 'rgba(180,215,250,0.10)' }}>
<span className="utci-cell" style={{ background: adjCat.bg, color: adjCat.fg }}>
{r.utciAdj.toFixed(1)}
</span>
</td>;
})()}
</tr>
);
})}
</tbody>
</table>
</div>
<div className="utci-legend">
<span className="utci-legend-label">Thermal stress bands</span>
<div className="utci-legend-row">
{[
{ l: '-27 to -13 Arctic', bg: '#3f73c4', fg: '#fff' },
{ l: '-13 to 0 Freezing', bg: '#7eb0e0', fg: '#111' },
{ l: '0 to 9 Cold', bg: '#bcd9ec', fg: '#111' },
{ l: '9 to 18 Chilled', bg: '#c8dcc0', fg: '#111' },
{ l: '18 to 26 Comfortable', bg: '#6ab05a', fg: '#fff' },
{ l: '26 to 32 Mod heat', bg: '#e8c547', fg: '#111' },
{ l: '32 to 38 Strong heat', bg: '#dc8a3a', fg: '#111' },
{ l: '38 to 46 V. strong', bg: '#c44a3a', fg: '#fff' },
{ l: '> 46 Extreme heat', bg: '#7a1a1a', fg: '#fff' },
].map((b, i) => (
<span key={i} className="utci-legend-item" style={{ background: b.bg, color: b.fg }}>
{b.l}
</span>
))}
</div>
</div>
</>
)}
<div className="utci-about">
<h2 className="utci-about-heading">What is SunScope?</h2>
<p className="utci-about-text">
SunScope shows how the weather will actually <em>feel</em> on your body — not just the air
temperature. It uses the <strong>Universal Thermal Climate Index (UTCI)</strong>, a
peer-reviewed biometeorological standard developed by Bröde et al. (2012) that combines
air temperature, humidity, wind speed, and solar radiation into a single <em>felt
temperature</em>. On a calm, sunny winter day UTCI can read several degrees warmer than
the thermometer; on a grey, blustery day it can read far colder. Forecast data is
sourced in real time from <strong>Open-Meteo</strong>, a free and open-source weather API,
and solar radiation is used to calculate Mean Radiant Temperature — the heat your skin
absorbs from the sun — making SunScope one of the most complete outdoor comfort forecasts
available for free.
</p>
<p className="utci-about-text">
The <strong>UTCI+P</strong> column adds the <strong>SunScope soak-factor</strong>: an
original precipitation penalty that accounts for the extra chill of rain and snow on
exposed skin and wet clothing. Light drizzle reduces the felt temperature by around
1–2 °C; heavy rain combined with wind can push it down by 7–8 °C. Snow carries an
additional penalty on top. The result is a honest, real-world comfort score for any
location worldwide — simply search for your town or city and compare the three-day
hourly forecast.
</p>
</div>
<div className="utci-footer">
<em>Reading the table.</em> A large positive Δ means your body is absorbing
far more heat than the air temperature alone suggests — typically due to direct solar radiation.
On clear sunny days this gap can exceed 10°C even at modest air temperatures.
</div>
</div>
</div>
);
}