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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

Lat: 44.977222°NLon: 110.695278°WElev: 6138.0ft.

NA

78°F

26°C

Humidity 22%
Wind Speed SW 6 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Heat Index78°F (26°C)
Last update 17 Aug 05:15 PM MDT
Extended Forecast for

Gardiner MT

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Partly sunny, with a steady temperature around 76. West northwest wind around 8 mph.

    High: 76 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 54. Northwest wind 5 to 8 mph becoming calm.

    Low: 54 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 87. East southeast wind 7 to 11 mph becoming west southwest in the afternoon.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. West southwest wind 6 to 10 mph becoming southeast after midnight.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 94. Southeast wind 6 to 8 mph becoming southwest in the afternoon.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. South southeast wind 6 to 9 mph.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 92. South southeast wind 7 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 92 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Partly sunny, with a steady temperature around 76. West northwest wind around 8 mph.
Tonight
A 50 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 54. Northwest wind 5 to 8 mph becoming calm.
Monday
Sunny, with a high near 87. East southeast wind 7 to 11 mph becoming west southwest in the afternoon.
Monday Night
Mostly clear, with a low around 54. West southwest wind 6 to 10 mph becoming southeast after midnight.
Tuesday
Sunny, with a high near 94. Southeast wind 6 to 8 mph becoming southwest in the afternoon.
Tuesday Night
Mostly clear, with a low around 56. South southeast wind 6 to 9 mph.
Wednesday
Mostly sunny, with a high near 92. South southeast wind 7 to 13 mph becoming southwest in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 49.
Saturday
A slight chance of showers and thunderstorms. Sunny, with a high near 89.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Gardiner MT
 45.04°N 110.73°W (Elev. 5440 ft)
Last Update:
5:13 pm MDT Aug 17, 2025
Forecast Valid:
5pm MDT Aug 17, 2025-6pm MDT Aug 24, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation