National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Flash Flooding Continuing Along the Gulf Coast; Dry Thunderstorms in the West

Excessive rainfall continues to produce life-threatening, locally catastrophic flash flooding along the central Gulf Coast. Isolated to scattered dry thunderstorms may cause lightning-ignited fires and erratic behavior due to gusty winds across parts Oregon, California, and the Great Basin into the weekend. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Mostly Cloudy

77°F

25°C

Humidity 47%
Wind Speed NW 10 G 20 mph
Barometer 29.81 in (1010.3 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 19 Jun 2:56 pm EDT
Extended Forecast for

Potomac MD

  • Tonight

    Tonight: Clear, with a low around 62. West wind 5 to 14 mph, with gusts as high as 23 mph.

    Low: 62 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 84. West wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 84 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 63. Northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 63 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 86. West wind 3 to 7 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers between 2am and 5am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 68. Light and variable wind. Chance of precipitation is 20%.

    Low: 68 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 88. Chance of precipitation is 90%.

    High: 88 °F

    Showers
    Likely then
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a slight chance of showers. Low around 65. Chance of precipitation is 80%.

    Low: 65 °F

    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 62. West wind 5 to 14 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 84. West wind 6 to 13 mph, with gusts as high as 23 mph.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 63. Northwest wind 5 to 8 mph becoming calm in the evening.
Sunday
Sunny, with a high near 86. West wind 3 to 7 mph.
Sunday Night
A slight chance of showers between 2am and 5am, then a slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 68. Light and variable wind. Chance of precipitation is 20%.
Monday
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 11am. High near 88. Chance of precipitation is 90%.
Monday Night
Showers and possibly a thunderstorm before 2am, then a slight chance of showers. Low around 65. Chance of precipitation is 80%.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac MD
 39.04°N 77.2°W (Elev. 397 ft)
Last Update:
2:22 pm EDT Jun 19, 2026
Forecast Valid:
3pm EDT Jun 19, 2026-6pm EDT Jun 26, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation