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

Risks of Severe Thunderstorms and Excessive Rainfall in the Central U.S.; Fire Weather Concerns in Alaska and Southwest

An expansive storm system will bring widespread storms with a threat for flash flooding and severe weather to much of the central to eastern U.S. into early this week. Critical fire weather conditions are expected across interior Alaska this weekend. Elevated fire conditions also expected in the Southwest U.S.. Conditions will remain uncomfortably hot across the southern Plains and the Southeast. Read More >

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Overcast

66°F

19°C

Humidity 68%
Wind Speed Calm
Barometer 29.85 in (1011.0 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 Jun 12:55 am EDT
Extended Forecast for

2 Miles WNW Accokeek MD

  • Overnight

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

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. West wind 3 to 8 mph.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 69. Light and variable wind.

    Low: 69 °F

    Increasing
    Clouds

  • Monday

    Monday: Showers and possibly a thunderstorm after 2pm. High near 93. Southeast wind 6 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 93 °F

    Mostly Sunny
    then Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 70. Southwest wind 5 to 7 mph. Chance of precipitation is 80%.

    Low: 70 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 66. Calm wind.
Sunday
Sunny, with a high near 89. West wind 3 to 8 mph.
Sunday Night
Increasing clouds, with a low around 69. Light and variable wind.
Monday
Showers and possibly a thunderstorm after 2pm. High near 93. Southeast wind 6 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and possibly a thunderstorm before 11pm, then showers likely. Low around 70. Southwest wind 5 to 7 mph. Chance of precipitation is 80%.
Tuesday
A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 87.
Wednesday Night
A slight chance of showers and thunderstorms after 2am. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms, mainly after 8am. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WNW Accokeek MD
 38.69°N 77.06°W (Elev. 144 ft)
Last Update:
10:52 pm EDT Jun 20, 2026
Forecast Valid:
1am EDT Jun 21, 2026-6pm EDT Jun 27, 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