Heavy Rainfall Continues in Hawaii; Severe Thunderstorms and Heavy Rainfall in the Plains and Southern Appalachians

Areas of gusty winds, heavy rain leading to flash flooding, and high surf continue across portions of Hawaii as Tropical Storm Lala continues to move away from the islands. Severe thunderstorms and heavy rainfall will shift into the southern Appalachians today. Strong to severe thunderstorms may produce large hail, scattered wind gusts, and heavy rain today across the northern and central Plains. Read More >

Current conditions at

Gary Cooper Bridge I-15 MP 242 (MTYEP)

Lat: 47.13948°NLon: 111.85908°WElev: 3427.0ft.

unknown precip

79°F

26°C

Humidity 38%
Wind Speed NNW 1 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index79°F (26°C)
Last update 17 Aug 02:00 PM MDT
Extended Forecast for

12 Miles S Cascade MT

Severe T-storm Warning until August 17, 03:00pm
Click here for hazard details and duration
Severe T-storm Warning
  •  
    Severe T-storm Warning until August 17, 03:00pm

    NOW until 3:00pm Mon

    Severe T-storm Warning

  • This Afternoon

    High: 70 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly before 8pm.  Patchy smoke after midnight. Mostly cloudy, with a low around 55. Northwest wind 5 to 7 mph becoming southeast after midnight.

    Low: 55 °F

    Chance
    T-storms then
    Patchy Smoke

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm.  Patchy smoke before 8am, then patchy smoke after 4pm. Mostly sunny, with a high near 70. West northwest wind around 7 mph.

    High: 70 °F

    Patchy Smoke
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 9pm.  Patchy smoke before midnight. Partly cloudy, with a low around 56. West northwest wind 6 to 11 mph becoming south southwest after midnight.

    Low: 56 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. Southwest wind 8 to 13 mph.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. West wind around 8 mph becoming south southwest after midnight.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 72. South southwest wind 5 to 8 mph becoming north in the afternoon.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. North northeast wind 5 to 7 mph becoming calm  after midnight.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a high near 70. West northwest wind around 6 mph.
Tonight
A 50 percent chance of showers and thunderstorms, mainly before 8pm. Patchy smoke after midnight. Mostly cloudy, with a low around 55. Northwest wind 5 to 7 mph becoming southeast after midnight.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Patchy smoke before 8am, then patchy smoke after 4pm. Mostly sunny, with a high near 70. West northwest wind around 7 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 9pm. Patchy smoke before midnight. Partly cloudy, with a low around 56. West northwest wind 6 to 11 mph becoming south southwest after midnight.
Wednesday
Sunny, with a high near 72. Southwest wind 8 to 13 mph.
Wednesday Night
Mostly clear, with a low around 57. West wind around 8 mph becoming south southwest after midnight.
Thursday
Sunny, with a high near 72. South southwest wind 5 to 8 mph becoming north in the afternoon.
Thursday Night
Mostly clear, with a low around 56. North northeast wind 5 to 7 mph becoming calm after midnight.
Friday
Mostly sunny, with a high near 73.
Friday Night
A slight chance of showers before midnight. Mostly cloudy, with a low around 61.
Saturday
A chance of showers. Partly sunny, with a high near 74.
Saturday Night
A chance of showers. Partly cloudy, with a low around 58.
Sunday
Sunny, with a high near 69.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles S Cascade MT
 47.1°N 111.67°W (Elev. 6362 ft)
12:32 pm MDT Aug 17, 2026
2pm MDT Aug 17, 2026-6pm MDT Aug 23, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database