Severe Thunderstorms in the Ohio Valley and Mid-Atlantic; Heat Continuing in the Central U.S.

Widespread strong to severe thunderstorms are expected from the Upper Ohio Valley into the Mid-Atlantic through Friday, with damaging winds as the primary threat. Dangerous heat will continue from the South-Central U.S. to the Midwest, Ohio/Tennessee valleys, and Mid-Atlantic. Widespread Major to Extreme Heat Risk is forecast into the weekend and will confine to the South-Central U.S. by Labor Day Read More >

Current conditions at

Frederick Municipal Airport (KFDK)

Lat: 39.42°NLon: 77.37°WElev: 269ft.

Light Rain Fog/Mist

73°F

23°C

Humidity 92%
Wind Speed E 6 mph
Barometer 30.00 in
Dewpoint 70°F (21°C)
Visibility 6.00 mi
Last update 3 Sep 11:55 pm EDT
Extended Forecast for

Green Valley MD

Severe T-storm Watch until September 4, 02:00am
Click here for hazard details and duration
...
  •  
    Severe T-storm Watch until September 4, 02:00am

    NOW until 2:00am Fri

    Severe T-storm Watch

  • Overnight

    Low: 71 °F

    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: A chance of showers and thunderstorms, mainly after 3pm.  Patchy fog before 8am.  Otherwise, increasing clouds, with a high near 87. Calm wind becoming northwest 5 to 9 mph in the morning.  Chance of precipitation is 30%.

    High: 87 °F

    Patchy Fog
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am.  Mostly cloudy, with a low around 68. Light west wind.  Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers after 8am.  Partly sunny, with a high near 80. North wind 3 to 6 mph.  Chance of precipitation is 20%.

    High: 80 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60. Calm wind becoming north around 5 mph after midnight.

    Low: 60 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Patchy fog after 5am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 71. West wind around 5 mph becoming calm. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms, mainly after 3pm. Patchy fog before 8am. Otherwise, increasing clouds, with a high near 87. Calm wind becoming northwest 5 to 9 mph in the morning. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Mostly cloudy, with a low around 68. Light west wind. Chance of precipitation is 50%.
Saturday
A slight chance of showers after 8am. Partly sunny, with a high near 80. North wind 3 to 6 mph. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 60. Calm wind becoming north around 5 mph after midnight.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 58.
Labor Day
Sunny, with a high near 78.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Thursday
A slight chance of showers. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Green Valley MD
 39.31°N 77.24°W (Elev. 548 ft)
10:55 pm EDT Sep 3, 2026
12am EDT Sep 4, 2026-6pm EDT Sep 10, 2026
 
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Additional Resources

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