Initial commit: Sunscope UTCI forecast site
This commit is contained in:
fraxle
@@ -0,0 +1,874 @@
|
||||
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>
|
||||
);
|
||||
}
|
||||
Reference in New Issue
Block a user