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.

A Few Clouds

81°F

27°C

Humidity 97%
Wind Speed S 5 mph
Barometer 29.92 in (1013.9 mb)
Dewpoint 80°F (27°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 18 Jun 7:56 pm EDT
Extended Forecast for

Ashton-Sandy Spring MD

  • Tonight

    Tonight: Mostly clear, with a low around 72. Southwest wind around 5 mph becoming calm  in the evening.

    Low: 72 °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 23 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: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am.  Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Southwest wind 7 to 9 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    T-storms
    Likely then
    Slight Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 83. Northwest wind around 8 mph.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 66. Calm wind.

    Low: 66 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 89.

    High: 89 °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 93.

    High: 93 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 72. 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 90. Southwest wind 6 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Southwest wind 7 to 9 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
Sunny, with a high near 83. Northwest wind around 8 mph.
Friday Night
Partly cloudy, with a low around 66. Calm wind.
Saturday
Sunny, with a high near 89.
Saturday Night
Partly cloudy, with a low around 70.
Sunday
Mostly sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny, with a high near 96.
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:
Ashton-Sandy Spring MD
 39.15°N 77.01°W (Elev. 449 ft)
7:30 pm EDT Jun 18, 2025
8pm EDT Jun 18, 2025-6pm EDT Jun 25, 2025
 
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Additional Resources

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