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

Flash Flooding Continuing Along the Gulf Coast; Dry Thunderstorms in the West

Excessive rainfall continues to produce life-threatening, locally catastrophic flash flooding along the central Gulf Coast. Isolated to scattered dry thunderstorms may cause lightning-ignited fires and erratic behavior due to gusty winds across parts Oregon, California, and the Great Basin into the weekend. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

71°F

22°C

Humidity 32%
Wind Speed NNE 8 MPH
Barometer NA
Dewpoint 39°F (4°C)
Visibility NA
Last update 19 Jun 04:15 PM MDT
Extended Forecast for

Mammoth WY

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 81. North wind 6 to 8 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 8pm and 9pm. Mostly cloudy, with a low around 50. Northwest wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 10%.

    Low: 50 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 74. Light and variable wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 3am, then a slight chance of showers between 3am and 5am. Low around 48. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Showers then
    Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 73. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 73 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45. West wind around 6 mph becoming calm in the evening.

    Low: 45 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 70. Calm wind becoming north northwest 5 to 9 mph in the morning. Winds could gust as high as 22 mph.

    High: 70 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Juneteenth
Mostly sunny, with a high near 81. North wind 6 to 8 mph.
Tonight
A slight chance of showers and thunderstorms between 8pm and 9pm. Mostly cloudy, with a low around 50. Northwest wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 10%.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 74. Light and variable wind becoming west around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before 3am, then a slight chance of showers between 3am and 5am. Low around 48. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 50 percent chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 73. Calm wind becoming west 5 to 7 mph in the afternoon.
Sunday Night
A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 45. West wind around 6 mph becoming calm in the evening.
Monday
A 10 percent chance of showers and thunderstorms after noon. Sunny, with a high near 70. Calm wind becoming north northwest 5 to 9 mph in the morning. Winds could gust as high as 22 mph.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 78.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 48.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 82.
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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:
4:17 pm MDT Jun 19, 2026
Forecast Valid:
4pm MDT Jun 19, 2026-6pm MDT Jun 25, 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