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

Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

64°F

18°C

Humidity 93%
Wind Speed Calm
Barometer 30.09 in (1019.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 19 May 5:55 am EDT
Extended Forecast for

Potomac Heights MD

  • Today

    Today: Sunny, with a high near 88. Southwest wind 5 to 8 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 70. South wind around 8 mph.

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 88. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Sunny then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 59. Northwest wind 5 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Showers

  • Thursday

    Thursday: Showers and thunderstorms likely. Mostly cloudy, with a high near 65. Northeast wind 7 to 10 mph. Chance of precipitation is 70%.

    High: 65 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 70%.

    Low: 55 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers. High near 61. Chance of precipitation is 80%.

    High: 61 °F

    Showers

  • Friday Night

    Friday Night: Showers likely. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.

    Low: 54 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.

    High: 69 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 88. Southwest wind 5 to 8 mph.
Tonight
Partly cloudy, with a low around 70. South wind around 8 mph.
Wednesday
A slight chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 88. Southwest wind 5 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm. Low around 59. Northwest wind 5 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and thunderstorms likely. Mostly cloudy, with a high near 65. Northeast wind 7 to 10 mph. Chance of precipitation is 70%.
Thursday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 55. Chance of precipitation is 70%.
Friday
Showers. High near 61. Chance of precipitation is 80%.
Friday Night
Showers likely. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
Saturday
Showers likely. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Saturday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Memorial Day
A chance of showers and thunderstorms. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Potomac Heights MD
 38.61°N 77.13°W (Elev. 49 ft)
Last Update:
4:53 am EDT May 19, 2026
Forecast Valid:
6am EDT May 19, 2026-6pm EDT May 25, 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