app.js

@@ -1043,6 +1043,34 @@ function animate() {
     rune.sprite.material.opacity = 0.65 + Math.sin(elapsed * 1.2 + rune.floatPhase) * 0.2;
   }
 
+  // === WEATHER PARTICLE ANIMATION ===
+  if (rainParticles.visible) {
+    const rpos = rainGeo.attributes.position.array;
+    for (let i = 0; i < PRECIP_COUNT; i++) {
+      rpos[i * 3 + 1] -= rainVelocities[i];
+      if (rpos[i * 3 + 1] < PRECIP_FLOOR) {
+        rpos[i * 3 + 1] = PRECIP_HEIGHT;
+        rpos[i * 3]     = (Math.random() - 0.5) * PRECIP_AREA * 2;
+        rpos[i * 3 + 2] = (Math.random() - 0.5) * PRECIP_AREA * 2;
+      }
+    }
+    rainGeo.attributes.position.needsUpdate = true;
+  }
+
+  if (snowParticles.visible) {
+    const spos = snowGeo.attributes.position.array;
+    for (let i = 0; i < PRECIP_COUNT; i++) {
+      spos[i * 3 + 1] -= 0.025 + Math.sin(snowDrift[i]) * 0.005;
+      spos[i * 3]     += Math.sin(elapsed * 0.4 + snowDrift[i]) * 0.008;
+      if (spos[i * 3 + 1] < PRECIP_FLOOR) {
+        spos[i * 3 + 1] = PRECIP_HEIGHT;
+        spos[i * 3]     = (Math.random() - 0.5) * PRECIP_AREA * 2;
+        spos[i * 3 + 2] = (Math.random() - 0.5) * PRECIP_AREA * 2;
+      }
+    }
+    snowGeo.attributes.position.needsUpdate = true;
+  }
+
   // Portal collision detection
   forwardVector.set(0, 0, -1).applyQuaternion(camera.quaternion);
   raycaster.set(camera.position, forwardVector);
@@ -2300,6 +2328,161 @@ loadLoRAStatus();
 // Refresh every 60 s so live updates propagate
 setInterval(loadLoRAStatus, 60000);
 
+// === WEATHER SYSTEM — Lempster NH ===
+// Fetches real current weather from Open-Meteo (no API key required).
+// Lempster, NH coordinates: 43.2897° N, 72.1479° W
+// Drives particle rain/snow effects and ambient mood tinting.
+
+const WEATHER_LAT = 43.2897;
+const WEATHER_LON = -72.1479;
+const WEATHER_REFRESH_MS = 15 * 60 * 1000; // 15 minutes
+
+/** @type {{ code: number, temp: number, wind: number, condition: string, icon: string }|null} */
+let weatherState = null;
+
+// Particle constants
+const PRECIP_COUNT = 1200;
+const PRECIP_AREA = 18;  // half-width of spawn box (scene units)
+const PRECIP_HEIGHT = 20; // top spawn Y
+const PRECIP_FLOOR = -5;  // bottom Y before reset
+
+// Rain geometry & material
+const rainGeo = new THREE.BufferGeometry();
+const rainPositions = new Float32Array(PRECIP_COUNT * 3);
+const rainVelocities = new Float32Array(PRECIP_COUNT); // per-particle fall speed
+
+for (let i = 0; i < PRECIP_COUNT; i++) {
+  rainPositions[i * 3]     = (Math.random() - 0.5) * PRECIP_AREA * 2;
+  rainPositions[i * 3 + 1] = Math.random() * (PRECIP_HEIGHT - PRECIP_FLOOR) + PRECIP_FLOOR;
+  rainPositions[i * 3 + 2] = (Math.random() - 0.5) * PRECIP_AREA * 2;
+  rainVelocities[i] = 0.18 + Math.random() * 0.12;
+}
+rainGeo.setAttribute('position', new THREE.BufferAttribute(rainPositions, 3));
+
+const rainMat = new THREE.PointsMaterial({
+  color: 0x88aaff,
+  size: 0.05,
+  sizeAttenuation: true,
+  transparent: true,
+  opacity: 0.55,
+});
+
+const rainParticles = new THREE.Points(rainGeo, rainMat);
+rainParticles.visible = false;
+scene.add(rainParticles);
+
+// Snow geometry & material
+const snowGeo = new THREE.BufferGeometry();
+const snowPositions = new Float32Array(PRECIP_COUNT * 3);
+const snowDrift = new Float32Array(PRECIP_COUNT); // horizontal drift phase
+
+for (let i = 0; i < PRECIP_COUNT; i++) {
+  snowPositions[i * 3]     = (Math.random() - 0.5) * PRECIP_AREA * 2;
+  snowPositions[i * 3 + 1] = Math.random() * (PRECIP_HEIGHT - PRECIP_FLOOR) + PRECIP_FLOOR;
+  snowPositions[i * 3 + 2] = (Math.random() - 0.5) * PRECIP_AREA * 2;
+  snowDrift[i] = Math.random() * Math.PI * 2;
+}
+snowGeo.setAttribute('position', new THREE.BufferAttribute(snowPositions, 3));
+
+const snowMat = new THREE.PointsMaterial({
+  color: 0xddeeff,
+  size: 0.12,
+  sizeAttenuation: true,
+  transparent: true,
+  opacity: 0.75,
+});
+
+const snowParticles = new THREE.Points(snowGeo, snowMat);
+snowParticles.visible = false;
+scene.add(snowParticles);
+
+/**
+ * Maps a WMO weather code to a human-readable condition label and icon.
+ * @param {number} code
+ * @returns {{ condition: string, icon: string }}
+ */
+function weatherCodeToLabel(code) {
+  if (code === 0)                   return { condition: 'Clear',         icon: '☀️' };
+  if (code <= 2)                    return { condition: 'Partly Cloudy', icon: '⛅' };
+  if (code === 3)                   return { condition: 'Overcast',      icon: '☁️' };
+  if (code >= 45 && code <= 48)     return { condition: 'Fog',           icon: '🌫️' };
+  if (code >= 51 && code <= 57)     return { condition: 'Drizzle',       icon: '🌦️' };
+  if (code >= 61 && code <= 67)     return { condition: 'Rain',          icon: '🌧️' };
+  if (code >= 71 && code <= 77)     return { condition: 'Snow',          icon: '❄️' };
+  if (code >= 80 && code <= 82)     return { condition: 'Showers',       icon: '🌦️' };
+  if (code >= 85 && code <= 86)     return { condition: 'Snow Showers',  icon: '🌨️' };
+  if (code >= 95 && code <= 99)     return { condition: 'Thunderstorm',  icon: '⛈️' };
+  return { condition: 'Unknown', icon: '🌀' };
+}
+
+/**
+ * Applies weather state to scene — particle visibility and ambient tint.
+ * @param {{ code: number, temp: number, wind: number, condition: string, icon: string }} wx
+ */
+function applyWeatherToScene(wx) {
+  const code = wx.code;
+
+  // Precipitation
+  const isRain  = (code >= 51 && code <= 67) || (code >= 80 && code <= 82) || (code >= 95 && code <= 99);
+  const isSnow  = (code >= 71 && code <= 77) || (code >= 85 && code <= 86);
+
+  rainParticles.visible = isRain;
+  snowParticles.visible = isSnow;
+
+  // Ambient mood tint
+  if (isSnow) {
+    ambientLight.color.setHex(0x1a2a40);  // cold blue-white
+    ambientLight.intensity = 1.8;
+  } else if (isRain) {
+    ambientLight.color.setHex(0x0a1428);  // darker, bluer
+    ambientLight.intensity = 1.2;
+  } else if (code === 3 || (code >= 45 && code <= 48)) {
+    ambientLight.color.setHex(0x0c1220);  // overcast grey-blue
+    ambientLight.intensity = 1.1;
+  } else {
+    ambientLight.color.setHex(0x0a1428);  // default clear
+    ambientLight.intensity = 1.4;
+  }
+}
+
+/**
+ * Updates the weather HUD elements in the DOM.
+ * @param {{ temp: number, condition: string, icon: string }} wx
+ */
+function updateWeatherHUD(wx) {
+  const iconEl = document.getElementById('weather-icon');
+  const tempEl = document.getElementById('weather-temp');
+  const descEl = document.getElementById('weather-desc');
+  if (iconEl) iconEl.textContent = wx.icon;
+  if (tempEl) tempEl.textContent = `${Math.round(wx.temp)}°F`;
+  if (descEl) descEl.textContent = wx.condition;
+}
+
+/**
+ * Fetches current weather for Lempster NH from Open-Meteo and applies it.
+ */
+async function fetchWeather() {
+  try {
+    const url = `https://api.open-meteo.com/v1/forecast?latitude=${WEATHER_LAT}&longitude=${WEATHER_LON}&current=temperature_2m,weather_code,wind_speed_10m&temperature_unit=fahrenheit&wind_speed_unit=mph&forecast_days=1`;
+    const res = await fetch(url);
+    if (!res.ok) throw new Error('weather fetch failed');
+    const data = await res.json();
+    const cur = data.current;
+    const code = cur.weather_code;
+    const { condition, icon } = weatherCodeToLabel(code);
+    weatherState = { code, temp: cur.temperature_2m, wind: cur.wind_speed_10m, condition, icon };
+    applyWeatherToScene(weatherState);
+    updateWeatherHUD(weatherState);
+  } catch {
+    // Silently use defaults — no weather data available
+    const descEl = document.getElementById('weather-desc');
+    if (descEl) descEl.textContent = 'Lempster NH';
+  }
+}
+
+fetchWeather();
+setInterval(fetchWeather, WEATHER_REFRESH_MS);
+
 // === TIMMY SPEECH BUBBLE ===
 // When Timmy sends a chat message, a glowing floating text sprite appears near
 // his avatar position above the platform. Fades in quickly, holds for 5 s total,

index.html

@@ -56,6 +56,12 @@
     <span class="zoom-hint">[Esc] or double-click to exit</span>
   </div>
 
+  <div id="weather-hud">
+    <span id="weather-icon">⛅</span>
+    <span id="weather-temp">--°F</span>
+    <span id="weather-desc">Lempster NH</span>
+  </div>
+
   <script>
     if ('serviceWorker' in navigator) {
       navigator.serviceWorker.register('/sw.js').catch(() => {});

style.css

@@ -201,6 +201,41 @@ body.photo-mode #overview-indicator {
   font-size: 10px;
 }
 
+/* === WEATHER HUD === */
+#weather-hud {
+  position: fixed;
+  bottom: 14px;
+  left: 14px;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  background: rgba(0, 6, 20, 0.72);
+  border: 1px solid rgba(68, 136, 255, 0.35);
+  border-radius: 6px;
+  padding: 5px 10px;
+  font-family: var(--font-body);
+  font-size: 12px;
+  color: var(--color-text);
+  z-index: 10;
+  pointer-events: none;
+  transition: opacity 0.5s ease;
+}
+
+#weather-icon {
+  font-size: 16px;
+}
+
+#weather-temp {
+  color: var(--color-primary);
+  font-weight: bold;
+  min-width: 40px;
+}
+
+#weather-desc {
+  color: var(--color-text-muted);
+  font-size: 11px;
+}
+
 /* === SOVEREIGNTY EASTER EGG === */
 #sovereignty-msg {
   display: none;