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Heavy Snow and Disruptive Ice in the Upper Midwest; Severe Thunderstorms in the Southern Plains

A late season winter storm will produce a combination of heavy snow and disruptive ice starting this evening in the Northern Plains and moving into the Upper Midwest and Great Lakes by tonight continuing through Thursday. Severe thunderstorms will likely produce severe wind gusts, large hail, a few tornadoes, and heavy rainfall across the southern and central Plains today. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

37°F

3°C

Humidity 93%
Wind Speed NE 1 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 01 Apr 09:15 AM MDT
Extended Forecast for

Mammoth WY

Winter Storm Watch April 1, 11:00pm until April 3, 06:00pm
Click here for hazard details and duration
Winter Storm Watch

  • Today

    Today: Scattered showers and thunderstorms, mainly between 1pm and 5pm. Partly sunny, with a high near 54. South southwest wind 5 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    High: 54 °F

    Partly Sunny
    then
    Scattered
    T-storms

  • Tonight

    Tonight: Rain and snow showers. Some thunder is also possible. Snow level 7800 feet lowering to 6700 feet after midnight . Low around 39. Southeast wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    Low: 39 °F

    Scattered
    Rain/Snow
    then
    Rain/Snow

  • Thursday

    Thursday: Rain and snow showers likely before 1pm, then snow showers. Some thunder is also possible. High near 45. Breezy, with a south wind 10 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 45 °F

    Rain/Snow
    Likely then
    Snow Showers
    and Breezy

  • Thursday Night

    Thursday Night: Snow showers. Low around 29. West northwest wind 8 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 29 °F

    Snow Showers

  • Friday

    Friday: Snow showers likely, mainly before noon. Mostly cloudy, with a high near 44. Northwest wind around 9 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Snow Showers
    Likely then
    Chance Snow
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25. West northwest wind 5 to 8 mph becoming light and variable. Winds could gust as high as 21 mph.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 53. South southwest wind 5 to 7 mph.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 30.

    Low: 30 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

Detailed Forecast

Today
Scattered showers and thunderstorms, mainly between 1pm and 5pm. Partly sunny, with a high near 54. South southwest wind 5 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Tonight
Rain and snow showers. Some thunder is also possible. Snow level 7800 feet lowering to 6700 feet after midnight . Low around 39. Southeast wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday
Rain and snow showers likely before 1pm, then snow showers. Some thunder is also possible. High near 45. Breezy, with a south wind 10 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday Night
Snow showers. Low around 29. West northwest wind 8 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Friday
Snow showers likely, mainly before noon. Mostly cloudy, with a high near 44. Northwest wind around 9 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
Partly cloudy, with a low around 25. West northwest wind 5 to 8 mph becoming light and variable. Winds could gust as high as 21 mph.
Saturday
Sunny, with a high near 53. South southwest wind 5 to 7 mph.
Saturday Night
Clear, with a low around 30.
Sunday
Sunny, with a high near 59.
Sunday Night
Partly cloudy, with a low around 34.
Monday
Mostly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Mostly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
Last Update:
9:47 am MDT Apr 1, 2026
Forecast Valid:
10am MDT Apr 1, 2026-6pm MDT Apr 7, 2026
 
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