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

Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that 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

46°F

8°C

Humidity 79%
Wind Speed N 0 MPH
Barometer 30.39 in (1029.12 mb)
Dewpoint 40°F (4°C)
Visibility NA
Last update 19 Aug 11:56 PM MDT
Extended Forecast for

Lake WY

  • Overnight

    Overnight: Patchy smoke between 2am and 5am. Mostly clear, with a low around 42. Light and variable wind.

    Low: 42 °F

    Patchy Smoke

  • Thursday

    Thursday: Sunny, with a high near 80. Light and variable wind becoming west 5 to 10 mph in the morning.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 46. West wind 5 to 7 mph becoming calm after midnight.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 75. Calm wind becoming southwest around 5 mph.

    High: 75 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 45. Light and variable wind.

    Low: 45 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Patchy smoke between 2am and 5am. Mostly clear, with a low around 42. Light and variable wind.
Thursday
Sunny, with a high near 80. Light and variable wind becoming west 5 to 10 mph in the morning.
Thursday Night
Partly cloudy, with a low around 46. West wind 5 to 7 mph becoming calm after midnight.
Friday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. Light and variable wind.
Friday Night
A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 47. Calm wind.
Saturday
A 50 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 75. Calm wind becoming southwest around 5 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 45. Light and variable wind.
Sunday
A 50 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 71.
Sunday Night
A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43.
Monday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 70.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 42.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 71.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 42.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 71.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake WY
 44.56°N 110.38°W (Elev. 7730 ft)
Last Update:
12:47 am MDT Aug 20, 2026
Forecast Valid:
1am MDT Aug 20, 2026-6pm MDT Aug 26, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation