National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms, Heavy Rainfall and Dangerous Heat

Severe thunderstorms are expected today and Friday from the upper Midwest, central Great Lakes into the Ohio and mid-Mississippi Valley's. In addition, heavy rainfall threat increases on Friday across the Ohio Valley. Meanwhile, early summer-like heat wave across portions of southern Texas with new daily records are forecast today and through the weekend; The heat spreads across the Gulf States. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NP (YLAW4)

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

NA

38°F

3°C

Humidity 84%
Wind Speed WSW 1 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 16 May 03:15 AM MDT
Extended Forecast for

Mammoth WY

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Snow level 6300 feet rising to 8200 feet in the afternoon. Partly sunny, with a high near 52. Light and variable wind becoming south southwest 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 52 °F

    Partly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 9pm, then a chance of showers. Mostly cloudy, with a low around 40. South wind 5 to 11 mph. Chance of precipitation is 60%.

    Low: 40 °F

    Showers
    Likely

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 62. South wind 5 to 9 mph.

    High: 62 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 43. South southeast wind around 6 mph. Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers, with thunderstorms also possible after noon. High near 50. South wind 5 to 9 mph becoming west in the afternoon. Chance of precipitation is 100%.

    High: 50 °F

    Showers

  • Sunday Night

    Sunday Night: Rain showers before 2am, then a chance of rain and snow showers. Snow level 7700 feet lowering to 6200 feet after midnight . Low around 35. Northwest wind 7 to 9 mph. Chance of precipitation is 80%.

    Low: 35 °F

    Showers then
    Chance
    Rain/Snow

  • Monday

    Monday: A chance of rain and snow showers before 11am, then a chance of rain showers. Snow level 6100 feet rising to 7800 feet in the afternoon. Partly sunny, with a high near 52. Northwest wind 7 to 11 mph. Chance of precipitation is 40%.

    High: 52 °F

    Chance
    Rain/Snow
    then Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers, mainly after noon. Mostly sunny, with a high near 60.

    High: 60 °F

    Slight Chance
    Showers then
    Chance
    Showers

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly after 2pm. Snow level 6300 feet rising to 8200 feet in the afternoon. Partly sunny, with a high near 52. Light and variable wind becoming south southwest 8 to 13 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Showers likely and possibly a thunderstorm before 9pm, then a chance of showers. Mostly cloudy, with a low around 40. South wind 5 to 11 mph. Chance of precipitation is 60%.
Saturday
A 40 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 62. South wind 5 to 9 mph.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 43. South southeast wind around 6 mph. Chance of precipitation is 70%.
Sunday
Showers, with thunderstorms also possible after noon. High near 50. South wind 5 to 9 mph becoming west in the afternoon. Chance of precipitation is 100%.
Sunday Night
Rain showers before 2am, then a chance of rain and snow showers. Snow level 7700 feet lowering to 6200 feet after midnight . Low around 35. Northwest wind 7 to 9 mph. Chance of precipitation is 80%.
Monday
A chance of rain and snow showers before 11am, then a chance of rain showers. Snow level 6100 feet rising to 7800 feet in the afternoon. Partly sunny, with a high near 52. Northwest wind 7 to 11 mph. Chance of precipitation is 40%.
Monday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 36.
Tuesday
A 50 percent chance of showers, mainly after noon. Mostly sunny, with a high near 60.
Tuesday Night
A 50 percent chance of showers, mainly before midnight. Partly cloudy, with a low around 38.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 62.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 39.
Thursday
A slight chance of showers. Mostly sunny, with a high near 65. Breezy.
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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:
4:14 am MDT May 16, 2025
Forecast Valid:
4am MDT May 16, 2025-6pm MDT May 22, 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