3.8.5

Correct 'Shade' temps for night

assets/js/compute.js

@@ -14,7 +14,7 @@
 import {
   vaporPressureHpa, solarElevationDeg, calcTmrt, utciApprox,
   calcConcreteTempPass, calcVehicleInteriorTempPass,
-  calcIndoorTempPass, calcManagedIndoorTempPass, calcShadeAirTemp,
+  calcIndoorTempPass, calcManagedIndoorTempPass, calcShadeAirTemp, calcShadeFeltTemp,
   calcFurSurfaceTempPass,
 } from './physics.js';
 import { windCompass8, uvSplit, cloudCategory, precipPenalty, sunburnMinutes, burnLabel, FUR_COLORS } from './utils.js';
@@ -84,15 +84,22 @@ export function buildHourlyRows({ forecast, airQuality, location, vehicleType, v
     const difEnv  = dif  * env.difFactor;
     const globEnv = glob * env.globFactor;
     // concreteT is now stamped in the two-pass section below (thermal lag).
-    // Shade air temp: the air you'd feel in this Solar Model's typical shade
-    // (building shadow, beach umbrella, canopy...). Shares SunSoak's TaEnv
-    // baseline and env-reduced radiation, so the two columns stay consistent.
-    const shadeT = calcShadeAirTemp(TaEnv, dirEnv + difEnv * 0.2, va, elev, env.shade);
     // vehicleT is stamped in the two-pass section below (thermal lag).
     const eh       = vaporPressureHpa(Ta, RH);
     const Tmrt     = calcTmrt(TaEnv, dirEnv, difEnv, globEnv, elev);
     const utci     = utciApprox(TaEnv, Tmrt, va, eh);
     const utciAdj = utci + precipPenalty(precip, snow, va);
+    // Shade air temp: what a thermometer in this Solar Model's typical shade
+    // (building shadow, beach umbrella, canopy...) would read. Shares
+    // SunSoak's TaEnv baseline and env-reduced radiation, so the two stay
+    // consistent. Pet Shade reads this directly; the human Shade column
+    // below turns it into a felt temperature first.
+    const shadeAirT = calcShadeAirTemp(TaEnv, dirEnv + difEnv * 0.2, va, elev, env.shade);
+    // Shade (felt): SunSoak with the direct beam taken away — still outdoors,
+    // so the same wind, humidity and rain penalty apply. See
+    // calcShadeFeltTemp() for why this is a felt number and not the air temp.
+    const shadeT = calcShadeFeltTemp(shadeAirT, difEnv, va, eh, elev, env.shade)
+                 + precipPenalty(precip, snow, va);
     // Derived
     const compass = windCompass8(wd);
     const { uvA, uvB } = uvSplit(uv, elev);
@@ -154,10 +161,11 @@ export function buildHourlyRows({ forecast, airQuality, location, vehicleType, v
       uv, uvA, uvB,
       precip, precipProb, lightning, cape, snow,
       soilT0, soilT6, soilM, shadeT,
-      // Pet Shade reads the same hourly value as Shade but aggregates as a
-      // MEAN rather than a worst case, so it needs its own field to diverge
-      // from shadeT at 2h/3h/4h. Same for pawT vs concreteT below.
-      petShadeT: shadeT,
+      // Pet Shade stays on the shade AIR temperature: the human Shade column
+      // is a UTCI felt number on a human comfort scale, which says nothing
+      // useful about a cat. It also aggregates as a MEAN rather than a worst
+      // case, so it needs its own field either way (same for pawT/concreteT).
+      petShadeT: shadeAirT,
       effectiveRad,
       elev, Tmrt, utci, utciAdj, eh, compass,
       visKm, aqi,
@@ -723,7 +731,7 @@ export function computeGlanceSummary(todayRows, profile, variant, skinType, cols
   // ── Pets (cats / small dogs) ────────────────────────────────────────────
   if (profile === 'pets') {
     const peakFur    = peakRow('furSurfaceT');
-    const peakShade  = peakRow('shadeT');
+    const peakShade  = peakRow('petShadeT');
     const peakIndoor = peakRow('indoorT');
     const maxPollen  = Math.max(0, ...todayRows.map(r => r.grassPollen ?? 0));
     const peakAqi    = Math.max(0, ...todayRows.map(r => r.aqi ?? 0));
@@ -740,8 +748,8 @@ export function computeGlanceSummary(todayRows, profile, variant, skinType, cols
       ...(show('petShadeT') ? [{
         icon: '🌳',
         label: 'Shade for pet',
-        value: peakShade ? `${Math.round(peakShade.shadeT)}° at ${hhmm(peakShade.iso)}` : '-',
-        alert: !!(peakShade && peakShade.shadeT >= 26),
+        value: peakShade ? `${Math.round(peakShade.petShadeT)}° at ${hhmm(peakShade.iso)}` : '-',
+        alert: !!(peakShade && peakShade.petShadeT >= 26),
         grp: 'ambient',
       }] : []),
       ...(show('petHomeT') ? [{