diff --git a/templates/imdroid_radar.html b/templates/imdroid_radar.html
index d12bc8f..7ca5a4b 100644
--- a/templates/imdroid_radar.html
+++ b/templates/imdroid_radar.html
@@ -90,7 +90,13 @@
     async function loadLatestTile(z, y, x) {
       const status = document.getElementById('tile_status');
       const res = await fetch(`/api/radar/latest?z=${z}&y=${y}&x=${x}`);
-      if (!res.ok) { status.textContent = '未找到瓦片'; return; }
+      if (!res.ok) {
+        status.textContent = '未找到瓦片';
+        // 当没有瓦片可用时，清空附近降雨提示，避免遗留旧提示
+        const nb = document.getElementById('nearbyStatus');
+        if (nb) { nb.textContent=''; nb.classList.remove('text-red-700'); nb.classList.add('text-gray-700'); }
+        return;
+      }
       const t = await res.json();
       const fmt = (n, d=5)=> Number(n).toFixed(d);
       document.getElementById('tile_dt').textContent = t.dt;
@@ -127,7 +133,13 @@
     async function loadTileAt(z, y, x, dtStr) {
       const status = document.getElementById('tile_status');
       const res = await fetch(`/api/radar/at?z=${z}&y=${y}&x=${x}&dt=${encodeURIComponent(dtStr)}`);
-      if (!res.ok) { status.textContent = '未找到瓦片'; return; }
+      if (!res.ok) {
+        status.textContent = '未找到瓦片';
+        // 清空附近降雨提示，避免遗留
+        const nb = document.getElementById('nearbyStatus');
+        if (nb) { nb.textContent=''; nb.classList.remove('text-red-700'); nb.classList.add('text-gray-700'); }
+        return;
+      }
       const t = await res.json();
       const fmt = (n, d=5)=> Number(n).toFixed(d);
       document.getElementById('tile_dt').textContent = t.dt;
@@ -393,7 +405,13 @@
     function maybeCalcNearbyRain(){
       try{
         const el = document.getElementById('nearbyStatus'); if(!el) return;
-        if(!gTileValues || !gXs || !gYs || gStLat===null || gStLon===null){ el.textContent=''; return; }
+        if(!gTileValues || !gXs || !gYs || gStLat===null || gStLon===null){
+          // 数据不足时清空提示并恢复默认样式
+          el.textContent='';
+          el.classList.remove('text-red-700');
+          el.classList.add('text-gray-700');
+          return;
+        }
         const radiusM = 8000; // 8km
         const h=gTileValues.length, w=gTileValues[0].length;
         let hit=false, maxDBZ=null;
@@ -405,7 +423,16 @@
             if(dist <= radiusM){ hit=true; maxDBZ = maxDBZ==null?dbz:Math.max(maxDBZ, dbz); break; }
           }
         }
-        if(hit){ el.textContent = `附近8公里内检测到大于等于 40dBz 的雷达反射率，短时间内可能会下雨`; el.classList.remove('text-gray-700'); el.classList.add('text-red-700'); }
+        if(hit){
+          el.textContent = `附近8公里内检测到大于等于 40dBz 的雷达反射率，短时间内可能会下雨`;
+          el.classList.remove('text-gray-700');
+          el.classList.add('text-red-700');
+        } else {
+          // 未命中时清空并恢复默认样式，避免提示“停留不消失”
+          el.textContent = '';
+          el.classList.remove('text-red-700');
+          el.classList.add('text-gray-700');
+        }
       }catch(e){ /* ignore */ }
     }