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Severe Thunderstorm Watch
Severe Thunderstorm Watch issued August 23 at 1:59PM MDT until August 23 at 7:00PM MDT by NWS Great Falls MT Expires Sun, 7:00 PM MDT.
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 Simms, Montana 59477. Forecasts and alerts update from NOAA and the National Weather Service.
85°Sunny3% rain86°Sunny2% rain84°Sunny2% rain
83°Clear0% rain81°Clear0% rain
75°Patchy Smoke0% rain
70°Mostly Clear0% rain66°Clear0% rainNext 24 hours
Rain Timeline
No meaningful precipitation is expected in the official hourly forecast.
3%None
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Official NWS outlook
7-Day Forecast
Today
! NWS88°52°
Sunny
- Precipitation
- 3%
- Wind
- WSW 23 mph
- Sunrise
- 6:35 AM
- Sunset
- 8:27 PM
Mon
82°52°
Sunny
- Precipitation
- 1%
- Wind
- WNW 5 to 8 mph
- Sunrise
- 6:37 AM
- Sunset
- 8:25 PM
Tue
83°54°
Sunny
- Precipitation
- 1%
- Wind
- NNE 2 to 7 mph
- Sunrise
- 6:38 AM
- Sunset
- 8:23 PM
Wed
90°56°
Mostly Sunny
- Precipitation
- 16%
- Wind
- S 1 to 7 mph
- Sunrise
- 6:39 AM
- Sunset
- 8:22 PM
Thu
92°55°
Mostly Sunny
- Precipitation
- 12%
- Wind
- SW 6 to 14 mph
- Sunrise
- 6:41 AM
- Sunset
- 8:20 PM
Fri
87°53°
Sunny
- Precipitation
- 9%
- Wind
- SSW 3 to 12 mph
- Sunrise
- 6:42 AM
- Sunset
- 8:18 PM
Sat
83°50°
Sunny
- Precipitation
- 19%
- Wind
- SW 5 to 13 mph
- Sunrise
- 6:43 AM
- Sunset
- 8:16 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 Feel86°F
Walking is not recommended now
Review the active Severe Thunderstorm Watch before going outside. MyUSA.us will not recommend this activity while an NWS watch, warning, or emergency is active.
WindSW12 mph
Best walk timeReview the active Severe Thunderstorm 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 qualitySimms, Montana 59477View AQI +
More weather details
Wind gusts20mph
Rain now3%next hour
Humidity25%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 chance3%
Dew point45°F
Active alerts1
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