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

OLD FAITHFUL RANGER STATION (OFAW4)

Lat: 44.456667°NLon: 110.849444°WElev: 7332.0ft.

NA

78°F

26°C

Humidity 26%
Wind Speed W 3 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Heat Index78°F (26°C)
Last update 19 Aug 05:15 PM MDT
Extended Forecast for

5 Miles SSW Lewis Lake WY

  • Tonight

    Tonight: Clear, with a low around 44. West wind 5 to 8 mph becoming calm  in the evening.

    Low: 44 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 76. Calm wind becoming west southwest 5 to 9 mph in the morning.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48. West southwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 80. Calm wind becoming west around 5 mph.

    High: 80 °F

    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50. Light and variable wind.

    Low: 50 °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 71. Calm wind becoming south southwest around 5 mph in the afternoon.  Chance of precipitation is 50%.

    High: 71 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 46. Light south southeast wind.

    Low: 46 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 67.

    High: 67 °F

    Partly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 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

Tonight
Clear, with a low around 44. West wind 5 to 8 mph becoming calm in the evening.
Thursday
Sunny, with a high near 76. Calm wind becoming west southwest 5 to 9 mph in the morning.
Thursday Night
Partly cloudy, with a low around 48. West southwest wind 5 to 8 mph becoming calm in the evening.
Friday
Sunny, with a high near 80. Calm wind becoming west around 5 mph.
Friday Night
Mostly cloudy, with a low around 50. Light and variable wind.
Saturday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 71. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 50%.
Saturday Night
A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 46. Light south southeast wind.
Sunday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 67.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 43.
Monday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 67.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 43.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 68.
Tuesday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 44.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 69.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Lewis Lake WY
 44.23°N 110.66°W (Elev. 8150 ft)
5:47 pm MDT Aug 19, 2026
5pm MDT Aug 19, 2026-6pm MDT Aug 26, 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