Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Frederick Municipal Airport (KFDK)

Lat: 39.42°NLon: 77.37°WElev: 269ft.

Fair

82°F

28°C

Humidity 70%
Wind Speed Vrbl 6 mph
Barometer 29.99 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 27 Aug 11:47 am EDT
Extended Forecast for

Green Valley MD

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms, mainly after 3pm. Some of the storms could be severe.  Partly sunny, with a high near 86. South wind around 8 mph.  Chance of precipitation is 40%.

    High: 86 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before midnight. Some of the storms could be severe.  Patchy fog after midnight.  Otherwise, mostly cloudy, with a low around 67. Southwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Friday

    Friday: A slight chance of showers and thunderstorms after 2pm.  Patchy fog before 9am.  Otherwise, partly sunny, with a high near 83. Calm wind becoming north around 5 mph.  Chance of precipitation is 20%.

    High: 83 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 65. Light north wind.

    Low: 65 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 84. North wind 3 to 5 mph.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms, mainly after 3pm. Some of the storms could be severe. Partly sunny, with a high near 86. South wind around 8 mph. Chance of precipitation is 40%.
Tonight
Showers and thunderstorms likely, mainly before midnight. Some of the storms could be severe. Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 67. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 83. Calm wind becoming north around 5 mph. Chance of precipitation is 20%.
Friday Night
Mostly cloudy, with a low around 65. Light north wind.
Saturday
Sunny, with a high near 84. North wind 3 to 5 mph.
Saturday Night
Mostly clear, with a low around 67.
Sunday
Sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 71.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Green Valley MD
 39.33°N 77.24°W (Elev. 607 ft)
10:53 am EDT Aug 27, 2026
12pm EDT Aug 27, 2026-6pm EDT Sep 2, 2026
 
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Additional Resources

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