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

Atmospheric River to Impact the Northwest; Windy Conditions in the Northeast

A strong atmospheric river moving into northern California later today will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through Wednesday. Gusty winds and isolated showers are expected today in the Northeast U.S. behind a cold front. Wind Advisories have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

46°F

8°C

Humidity 66%
Wind Speed SE 9 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Wind Chill41°F (5°C)
Last update 04 Nov 01:15 PM MST
Extended Forecast for

Mammoth WY

  • This Afternoon

    This Afternoon: Isolated showers after 4pm. Mostly cloudy, with a high near 54. South wind around 10 mph. Chance of precipitation is 20%.

    High: 54 °F

    Isolated
    Showers

  • Tonight

    Tonight: Scattered showers, mainly between 9pm and 10pm. Mostly cloudy, with a low around 38. Southeast wind around 8 mph. Chance of precipitation is 30%.

    Low: 38 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Cloudy, then gradually becoming mostly sunny, with a high near 57. South wind 8 to 14 mph, with gusts as high as 21 mph.

    High: 57 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: A chance of rain showers before 5am, then snow showers likely, possibly mixed with rain. Mostly cloudy, with a low around 38. Breezy, with a southwest wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 38 °F

    Chance
    Showers and
    Breezy then
    Rain/Snow
    Likely

  • Thursday

    Thursday: Rain likely, possibly mixed with snow before 11am, then a chance of rain. Some thunder is also possible. Snow level 6700 feet. Mostly cloudy, with a high near 46. West southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 46 °F

    Rain/Snow
    Likely then
    Chance Rain

  • Thursday Night

    Thursday Night: A slight chance of rain and snow after 11pm. Snow level 6200 feet. Mostly cloudy, with a low around 33. South southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    Rain/Snow

  • Friday

    Friday: Rain, possibly mixed with snow. Snow level 6500 feet. High near 43. South southwest wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.

    High: 43 °F

    Rain/Snow

  • Friday Night

    Friday Night: A chance of rain and snow before 11pm. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.

    Low: 22 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Isolated showers after 4pm. Mostly cloudy, with a high near 54. South wind around 10 mph. Chance of precipitation is 20%.
Tonight
Scattered showers, mainly between 9pm and 10pm. Mostly cloudy, with a low around 38. Southeast wind around 8 mph. Chance of precipitation is 30%.
Wednesday
Cloudy, then gradually becoming mostly sunny, with a high near 57. South wind 8 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
A chance of rain showers before 5am, then snow showers likely, possibly mixed with rain. Mostly cloudy, with a low around 38. Breezy, with a southwest wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday
Rain likely, possibly mixed with snow before 11am, then a chance of rain. Some thunder is also possible. Snow level 6700 feet. Mostly cloudy, with a high near 46. West southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Thursday Night
A slight chance of rain and snow after 11pm. Snow level 6200 feet. Mostly cloudy, with a low around 33. South southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Friday
Rain, possibly mixed with snow. Snow level 6500 feet. High near 43. South southwest wind 10 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
Friday Night
A chance of rain and snow before 11pm. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.
Saturday
Mostly sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 20.
Sunday
Mostly sunny, with a high near 46.
Sunday Night
Mostly cloudy, with a low around 27.
Monday
Partly sunny, with a high near 52.
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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:
1:47 pm MST Nov 4, 2025
Forecast Valid:
2pm MST Nov 4, 2025-6pm MST Nov 10, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation