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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

South Big Horn County Airport (KGEY)

Lat: 44.5174°NLon: 108.0752°WElev: 3934.0ft.

Clear

77°F

25°C

Humidity 33%
Wind Speed S 3 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Aug 11:05 AM MDT
Extended Forecast for

Manderson WY

  • Today

    Today: A 10 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 90. Calm wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 90 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 60. West wind 9 to 14 mph becoming light and variable. Winds could gust as high as 22 mph.

    Low: 60 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 90. South southeast wind 3 to 5 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 57. East southeast wind 3 to 6 mph.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 58. Southeast wind 5 to 10 mph.

    Low: 58 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98. Light and variable wind becoming west southwest 5 to 7 mph in the afternoon.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

Detailed Forecast

Today
A 10 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 90. Calm wind becoming west southwest 5 to 7 mph in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 60. West wind 9 to 14 mph becoming light and variable. Winds could gust as high as 22 mph.
Monday
Sunny, with a high near 90. South southeast wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 57. East southeast wind 3 to 6 mph.
Tuesday
Sunny, with a high near 96. Calm wind becoming east southeast around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 58. Southeast wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 98. Light and variable wind becoming west southwest 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 60.
Thursday
Sunny, with a high near 91.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 88.
Friday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 54.
Saturday
A slight chance of showers and thunderstorms. Sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Manderson WY
 44.26°N 107.95°W (Elev. 3999 ft)
Last Update:
9:43 am MDT Aug 17, 2025
Forecast Valid:
11am MDT Aug 17, 2025-6pm MDT Aug 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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