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

Yellowstone Lake (KP60)

Lat: 44.54444°NLon: 110.42111°WElev: 7835.0ft.

NA

59°F

15°C

Humidity 62%
Wind Speed N 0 MPH
Barometer 30.34 in (1027.43 mb)
Dewpoint 46°F (8°C)
Visibility NA
Last update 18 Aug 06:56 PM MDT
Extended Forecast for

11 Miles SE Lewis Lake WY

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Some of the storms could be severe.  Partly cloudy, with a low around 44. West wind 5 to 7 mph becoming calm  in the evening.

    Low: 44 °F

    Severe
    Thunderstorms
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. Light south southwest wind becoming west southwest 8 to 13 mph in the morning.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46. West southwest wind 5 to 9 mph becoming calm  in the evening.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 78. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 51. West wind around 5 mph becoming calm  in the evening.

    Low: 51 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 80. Light and variable wind.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms, then a chance of showers after midnight.  Mostly cloudy, with a low around 52. Southeast wind 3 to 5 mph.  Chance of precipitation is 30%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after noon.  Mostly cloudy, with a high near 72. Chance of precipitation is 50%.

    High: 72 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 49.

    Low: 49 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Some of the storms could be severe. Partly cloudy, with a low around 44. West wind 5 to 7 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 72. Light south southwest wind becoming west southwest 8 to 13 mph in the morning.
Wednesday Night
Mostly clear, with a low around 46. West southwest wind 5 to 9 mph becoming calm in the evening.
Thursday
Sunny, with a high near 78. Calm wind becoming west southwest around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 51. West wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 80. Light and variable wind.
Friday Night
A slight chance of showers and thunderstorms, then a chance of showers after midnight. Mostly cloudy, with a low around 52. Southeast wind 3 to 5 mph. Chance of precipitation is 30%.
Saturday
A chance of showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 49.
Sunday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 47.
Monday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 71.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 48.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SE Lewis Lake WY
 44.21°N 110.44°W (Elev. 7536 ft)
6:01 pm MDT Aug 18, 2026
7pm MDT Aug 18, 2026-6pm MDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database