Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

WY28 - South Pass (KSOU)

Lat: 42.47752°NLon: 108.8444°WElev: 8196.0ft.

NA

30°F

-1°C

Humidity 67%
Wind Speed WNW 8 MPH
Barometer NA
Dewpoint 20°F (-7°C)
Visibility NA
Wind Chill22°F (-6°C)
Last update 20 May 02:12 AM MDT
Extended Forecast for

21 Miles ESE Boulder WY

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 30. North northeast wind 3 to 5 mph.

    Low: 30 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of rain and snow showers, mainly after 5pm. Some thunder is also possible.  Mostly sunny, with a high near 49. North northeast wind 5 to 13 mph becoming west in the morning.  Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 49 °F

    Sunny then
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A chance of rain showers before 3am, then snow showers likely.  Snow level 8600 feet lowering to 7900 feet after midnight . Mostly cloudy, with a low around 33. West northwest wind 5 to 7 mph becoming calm  after midnight.  Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 33 °F

    Chance
    Showers then
    Snow Showers
    Likely

  • Thursday

    Thursday: Snow showers likely before 9am, then rain and snow showers. Some thunder is also possible.  Snow level rising to 8700 feet in the afternoon. High near 44. Calm wind becoming south southwest 5 to 9 mph in the morning.  Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of rain and snow showers before 9pm, then a chance of snow showers between 9pm and midnight. Some thunder is also possible.  Mostly cloudy, with a low around 27. East northeast wind 5 to 8 mph becoming calm  after midnight.  Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 27 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 50. Calm wind becoming west 5 to 9 mph in the morning.

    High: 50 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32. West wind 5 to 8 mph becoming calm  in the evening.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 30. North northeast wind 3 to 5 mph.
Wednesday
A chance of rain and snow showers, mainly after 5pm. Some thunder is also possible. Mostly sunny, with a high near 49. North northeast wind 5 to 13 mph becoming west in the morning. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday Night
A chance of rain showers before 3am, then snow showers likely. Snow level 8600 feet lowering to 7900 feet after midnight . Mostly cloudy, with a low around 33. West northwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
Snow showers likely before 9am, then rain and snow showers. Some thunder is also possible. Snow level rising to 8700 feet in the afternoon. High near 44. Calm wind becoming south southwest 5 to 9 mph in the morning. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of rain and snow showers before 9pm, then a chance of snow showers between 9pm and midnight. Some thunder is also possible. Mostly cloudy, with a low around 27. East northeast wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 50%. Little or no snow accumulation expected.
Friday
Mostly sunny, with a high near 50. Calm wind becoming west 5 to 9 mph in the morning.
Friday Night
Partly cloudy, with a low around 32. West wind 5 to 8 mph becoming calm in the evening.
Saturday
Sunny, with a high near 58.
Saturday Night
Mostly clear, with a low around 38.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63.
Sunday Night
Mostly clear, with a low around 42.
Memorial Day
Sunny, with a high near 66. Breezy.
Monday Night
Partly cloudy, with a low around 45. Breezy.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 64. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
21 Miles ESE Boulder WY
 42.58°N 109.27°W (Elev. 7936 ft)
1:32 am MDT May 20, 2026
2am MDT May 20, 2026-6pm MDT May 26, 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