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

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

63°F

17°C

Humidity 86%
Wind Speed Calm
Barometer 29.77 in (1008.3 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 17 Jun 1:55 am EDT
Extended Forecast for

Potomac Heights MD

  • Overnight

    Overnight: Scattered showers, mainly after 3am. Mostly cloudy, with a low around 63. Light southeast wind. Chance of precipitation is 30%.

    Low: 63 °F

    Scattered
    Showers

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 88 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 71. South wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 95. Heat index values as high as 100. Southwest wind 13 to 16 mph, with gusts as high as 28 mph.

    High: 95 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Mostly cloudy, with a low around 69. Southwest wind 5 to 8 mph. Chance of precipitation is 40%.

    Low: 69 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: A chance of showers before 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 62.

    Low: 62 °F

    Clear

Detailed Forecast

Overnight
Scattered showers, mainly after 3am. Mostly cloudy, with a low around 63. Light southeast wind. Chance of precipitation is 30%.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 88. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 71. South wind 6 to 9 mph, with gusts as high as 18 mph.
Thursday
Mostly sunny, with a high near 95. Heat index values as high as 100. Southwest wind 13 to 16 mph, with gusts as high as 28 mph.
Thursday Night
A slight chance of showers and thunderstorms, then a chance of showers after 11pm. Mostly cloudy, with a low around 69. Southwest wind 5 to 8 mph. Chance of precipitation is 40%.
Juneteenth
A chance of showers before 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Friday Night
Mostly clear, with a low around 63.
Saturday
Sunny, with a high near 85.
Saturday Night
Clear, with a low around 62.
Sunday
Sunny, with a high near 89.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 89. Chance of precipitation is 70%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac Heights MD
 38.58°N 77.11°W (Elev. 49 ft)
Last Update:
2:23 am EDT Jun 17, 2026
Forecast Valid:
2am EDT Jun 17, 2026-6pm EDT Jun 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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