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

Tropical Storm and Storm Surge Warnings for the North Carolina Outer Banks; Hot in the Mississippi Valley

Tropical Storm conditions and coastal flooding are possible in the North Carolina Outer Banks beginning late Wednesday. Tropical Storm and Storm Surge Warnings are in effect. Hurricane Erin is expected to bring life threatening surf and rip currents along the East Coast beaches this week. Hot to extremely hot temperatures continue across parts of the Southern Plains and Mississippi Valley today. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

68°F

20°C

Humidity NA
Wind Speed Vrbl 3 mph
Barometer 30.11 in (1020.6 mb)
Dewpoint N/A
Visibility 10.00 mi
Last update 19 Aug 7:56 pm EDT
Extended Forecast for

Potomac MD

  • Tonight

    Tonight: Patchy drizzle before midnight, then patchy drizzle after 2am. Mostly cloudy, with a low around 68. East wind 5 to 7 mph.

    Low: 68 °F

    Patchy
    Drizzle

  • Wednesday

    Wednesday: Patchy showers, with thunderstorms also possible after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 84. Southeast wind 3 to 6 mph. Chance of precipitation is 30%.

    High: 84 °F

    Patchy
    Drizzle then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms between 7pm and 2am, then a slight chance of showers. Mostly cloudy, with a low around 69. Northeast wind around 8 mph. Chance of precipitation is 40%.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 77. Northeast wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 77 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 8pm. Partly cloudy, with a low around 62. North wind 7 to 10 mph. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy drizzle before midnight, then patchy drizzle after 2am. Mostly cloudy, with a low around 68. East wind 5 to 7 mph.
Wednesday
Patchy showers, with thunderstorms also possible after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 84. Southeast wind 3 to 6 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms between 7pm and 2am, then a slight chance of showers. Mostly cloudy, with a low around 69. Northeast wind around 8 mph. Chance of precipitation is 40%.
Thursday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 77. Northeast wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Thursday Night
A chance of showers before 8pm. Partly cloudy, with a low around 62. North wind 7 to 10 mph. Chance of precipitation is 30%.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 61.
Saturday
Mostly sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 60.
Tuesday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac MD
 39.02°N 77.2°W (Elev. 381 ft)
Last Update:
7:29 pm EDT Aug 19, 2025
Forecast Valid:
8pm EDT Aug 19, 2025-6pm EDT Aug 26, 2025
 
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