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 >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

85°F

29°C

Humidity 77%
Wind Speed S 3 mph
Barometer 29.90 in (1013.3 mb)
Dewpoint 77°F (25°C)
Visibility 8.00 mi
Heat Index96°F (36°C)
Last update 18 Jun 4:56 pm EDT
Extended Forecast for

Derwood MD

  • This Afternoon

    This Afternoon: Scattered showers and thunderstorms. Some of the storms could be severe.  Partly sunny, with a high near 87. West wind around 8 mph.  Chance of precipitation is 50%.

    High: 87 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: Partly cloudy, with a low around 71. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 71 °F

    Partly Cloudy

  • 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 91. 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: 91 °F

    Sunny then
    Heavy Rain

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm.  Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Southwest wind 7 to 9 mph.  Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84. Northwest wind around 8 mph.

    High: 84 °F

    Sunny

  • Friday Night

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

    Low: 65 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 94.

    High: 94 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Scattered showers and thunderstorms. Some of the storms could be severe. Partly sunny, with a high near 87. West wind around 8 mph. Chance of precipitation is 50%.
Tonight
Partly cloudy, with a low around 71. Southwest wind around 5 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 91. 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 8pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Southwest wind 7 to 9 mph. Chance of precipitation is 30%.
Friday
Sunny, with a high near 84. Northwest wind around 8 mph.
Friday Night
Partly cloudy, with a low around 65.
Saturday
Sunny, with a high near 90.
Saturday Night
Partly cloudy, 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 98.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Sunny and hot, with a high near 97.
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ABOUT THIS FORECAST

 
Point Forecast:
Derwood MD
 39.14°N 77.12°W (Elev. 400 ft)
4:30 pm EDT Jun 18, 2025
5pm EDT Jun 18, 2025-6pm EDT Jun 25, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database