Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

MAMMOTH AT YELLOWSTONE NATIONAL PARK (YLAW4)

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

NA

52°F

11°C

Humidity 72%
Wind Speed S 2 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 19 Aug 03:15 AM MDT
Extended Forecast for

Mammoth WY

  • Today

    Today: Sunny, with a high near 83. Calm wind becoming west northwest 5 to 8 mph in the afternoon.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Northwest wind 5 to 8 mph becoming light and variable.

    Low: 50 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55. West northwest wind around 6 mph becoming light and variable.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 91. Southeast wind around 5 mph becoming calm.

    High: 91 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 57. North wind around 6 mph becoming south southeast after midnight.

    Low: 57 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Mostly cloudy, with a high near 83. South wind around 7 mph, with gusts as high as 20 mph.  Chance of precipitation is 50%.

    High: 83 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 80. Chance of precipitation is 40%.

    High: 80 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 83. Calm wind becoming west northwest 5 to 8 mph in the afternoon.
Tonight
Mostly clear, with a low around 50. Northwest wind 5 to 8 mph becoming light and variable.
Thursday
Sunny, with a high near 89. Calm wind becoming west 5 to 7 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 55. West northwest wind around 6 mph becoming light and variable.
Friday
Mostly sunny, with a high near 91. Southeast wind around 5 mph becoming calm.
Friday Night
Mostly cloudy, with a low around 57. North wind around 6 mph becoming south southeast after midnight.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 83. South wind around 7 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Saturday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80. Chance of precipitation is 40%.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 51.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Mammoth WY
 44.98°N 110.69°W (Elev. 5745 ft)
2:46 am MDT Aug 19, 2026
4am MDT Aug 19, 2026-6pm MDT Aug 25, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database