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Extreme Heat Watch
Extreme Heat Watch issued August 23 at 1:54PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA Expires Fri, 8:00 PM PDT.
Official NOAA / NWSWSR-88D DopplerUpdates every 5 minutes
Live Doppler radar
Animated Multi-Radar/Multi-Sensor reflectivity from the National Weather Service’s network of Doppler radars. Search a U.S. city, ZIP code, or street address to center the map on local weather, then zoom to neighborhood street detail.
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After loading, MyUSA.us shows the exact Doppler frame time, refresh controls, and an official NWS fallback if the map is unavailable.Doppler radar and warnings: NOAA/National Weather Service · Map: OpenFreeMap, OpenMapTiles and OpenStreetMap contributors. Radar can be delayed briefly during service updates.
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What’s next
Hourly forecast
Check the latest hourly conditions, seven-day outlook, rain timing, wind, sunrise and sunset for Lake Arrowhead, California 92352. Forecasts and alerts update from NOAA and the National Weather Service.
85°Sunny0% rain84°Sunny1% rain
80°Mostly Clear1% rain78°Mostly Clear1% rain75°Mostly Clear1% rain75°Mostly Clear1% rain75°Mostly Clear1% rain
74°Partly Cloudy1% rainNext 24 hours
Rain Timeline
No meaningful precipitation is expected in the official hourly forecast.
0%None
1%None
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1%None
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1%None
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1%None
1%None
1%None
1%None
1%None
1%None
0%None
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2%None
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Official NWS outlook
7-Day Forecast
Today
! NWS86°71°
Sunny
- Precipitation
- 1%
- Wind
- S 10 to 15 mph
- Sunrise
- 6:17 AM
- Sunset
- 7:28 PM
Mon
86°70°
Sunny
- Precipitation
- 2%
- Wind
- S 5 to 10 mph
- Sunrise
- 6:17 AM
- Sunset
- 7:27 PM
Tue
88°71°
Sunny
- Precipitation
- 3%
- Wind
- NW 0 to 5 mph
- Sunrise
- 6:18 AM
- Sunset
- 7:26 PM
Wed
88°72°
Sunny
- Precipitation
- 1%
- Wind
- SW 5 to 10 mph
- Sunrise
- 6:19 AM
- Sunset
- 7:24 PM
Thu
88°72°
Sunny
- Precipitation
- 2%
- Wind
- SW 5 to 10 mph
- Sunrise
- 6:20 AM
- Sunset
- 7:23 PM
Fri
87°70°
Sunny
- Precipitation
- 2%
- Wind
- S 0 to 10 mph
- Sunrise
- 6:20 AM
- Sunset
- 7:22 PM
Sat
86°69°
Sunny
- Precipitation
- 1%
- Wind
- S 5 to 10 mph
- Sunrise
- 6:21 AM
- Sunset
- 7:20 PM
Forecasts, icons, precipitation, wind, and alerts are from the National Weather Service. Sunrise and sunset are calculated locally for the selected coordinates.
Weather for a healthier day
Healthy Weather
Real Feel90°F
Walking is not recommended now
Review the active Extreme Heat Watch before going outside. MyUSA.us will not recommend this activity while an NWS watch, warning, or emergency is active.
WindS9 mph
Best walk timeReview the active Extreme Heat Watch before leaving
MyUSA.us will not recommend an outing window while an NWS watch, warning, or emergency is active. Follow the official alert and local instructions.
Official EPA AirNowLocal air qualityLake Arrowhead, California 92352View AQI +
More weather details
Wind gusts20mph
Rain now0%next hour
Humidity20%current
UV indexCheckingEPA forecast
Wind impact: Noticeable breeze with generally minor outdoor impact.
“Better weather window” is planning guidance based on official NWS data—not a promise of safe conditions. Review active alerts and radar before leaving.
Storm & DetailsGusts, pressure, visibility and official risk outlooksView details +
Wind gust20 mph
Pressure—
Visibility—
Peak rain chance2%
Dew point44°F
Active alerts2
Official risk outlooks
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Active NWS alerts
Severe · Future
Extreme Heat Watch
Applies to: San Bernardino County MountainsIssued by: NWS San Diego CAExtreme Heat Watch issued August 23 at 1:54PM PDT until August 28 at 8:00PM PDT by NWS San Diego CAAlert details
* WHAT...Temperatures in the mid to upper 90s below 5000 ft MSL. * WHERE...San Bernardino County Mountains. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses.Safety instructions
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.Moderate · Expected