Severe Thunderstorms and Heavy Rainfall Across the Midwest into the Great Lakes Region; Significant Heat in the Southwest

Strong to severe storms may produce damaging winds, isolated hail, and a few tornadoes from the Midwest into the lower Great Lakes. These storms may also produce areas of heavy rain and flash flooding. Significant heat will continue across parts of the Desert Southwest into western Texas and north Alaska. Dangerous heat will also build into the Eastern and Central U.S. and continue into next week. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

82°F

28°C

Humidity 90%
Wind Speed Vrbl 5 mph
Barometer 29.91 in (1013.7 mb)
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 18 Jun 6:56 pm EDT
Extended Forecast for

Brookeville MD

Flash Flood Warning until June 18, 09:30pm
Click here for hazard details and duration
...
  •  
    Flash Flood Warning until June 18, 09:30pm

    NOW until 9:30pm Wed

    Flash Flood Warning

  • Tonight

    Low: 71 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: A slight chance of showers, then showers and thunderstorms likely after 2pm. Some of the storms could produce heavy rainfall.  Increasing clouds, with a high near 90. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.  Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 90 °F

    Sunny then
    Heavy Rain

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am.  Mostly cloudy, then gradually becoming mostly clear, with a low around 64. Southwest wind 7 to 9 mph.  Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 83. Northwest wind 7 to 9 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 71. West wind around 6 mph becoming calm in the evening.
Juneteenth
A slight chance of showers, then showers and thunderstorms likely after 2pm. Some of the storms could produce heavy rainfall. Increasing clouds, with a high near 90. Southwest wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 64. Southwest wind 7 to 9 mph. Chance of precipitation is 30%.
Friday
Sunny, with a high near 83. Northwest wind 7 to 9 mph.
Friday Night
Partly cloudy, with a low around 65. Calm wind.
Saturday
Sunny, with a high near 89.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Mostly sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 75.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Sunny, with a high near 96.
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ABOUT THIS FORECAST

 
Point Forecast:
Brookeville MD
 39.18°N 77.06°W (Elev. 446 ft)
4:30 pm EDT Jun 18, 2025
7pm EDT Jun 18, 2025-6pm EDT Jun 25, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database