Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Hazardous Weather Conditions

Special Marine Warning in effect from May 19, 05:31 PM EDT until May 19, 07:00 PM EDT

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

97°F

36°C

Humidity	29%
Wind Speed	S 7 mph
Barometer	30.01 in (1016.5 mb)
Dewpoint	59°F (15°C)
Visibility	10.00 mi
Heat Index	97°F (36°C)
Last update	19 May 4:55 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Mount Vernon VA

This Afternoon
High: 97 °F
Hot
Tonight
Low: 74 °F
Scattered
T-storms then
Mostly Clear
Wednesday
High: 96 °F
Sunny then
Showers
Likely
Wednesday Night
Low: 60 °F
Showers
Likely
Thursday
High: 68 °F
Showers
Thursday Night
Low: 53 °F
Chance
Showers then
Showers
Likely
Friday
High: 64 °F
Showers
Friday Night
Low: 53 °F
Showers
Saturday
High: 68 °F
Showers

Detailed Forecast

This Afternoon

Mostly sunny and hot, with a high near 97. Southwest wind around 10 mph.

Tonight

Scattered showers and thunderstorms, mainly before 7pm. Mostly cloudy, then gradually becoming clear, with a low around 74. South wind around 6 mph. Chance of precipitation is 30%.

Wednesday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 96. Southwest wind 5 to 10 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 thunderstorms likely before 2am, then a chance of showers between 2am and 4am. Cloudy, with a low around 60. North wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

Showers, with thunderstorms also possible after 5pm. High near 68. Northeast wind 8 to 11 mph. Chance of precipitation is 80%.

Thursday Night

A chance of showers and thunderstorms, then showers likely after 8pm. Cloudy, with a low around 53. Chance of precipitation is 70%.

Friday

Showers. High near 64. Chance of precipitation is 80%.

Friday Night

Showers. Low around 53. Chance of precipitation is 80%.

Saturday

Showers. High near 68. Chance of precipitation is 80%.

Saturday Night

Showers likely, mainly before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.