Cold Front to Bring Cooling and Heavy Rain in the East; Building Heat and Monsoon in the West

A slow moving cold front will bring temperatures back to near normal early this week in the East. Strong to severe storms ahead of the front may produce damaging winds and heavy rain that could cause flash flooding. Strengthening high pressure in the West will produce surging monsoon moisture with potential for flash flooding. Heat may become excessive in the Desert Southwest this week. Read More >

Hazardous Weather Conditions

En Español

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Mostly Cloudy

31°C

87°F

Humidity	61%
Wind Speed	SW 13 km/h
Barometer	1009.0 mb (29.79 in)
Dewpoint	22°C (72°F)
Visibility	16 km
Heat Index	34°C (93°F)
Last update	22 Jul 7:56 pm EDT

More Information:

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

Extended Forecast for

Mount Vernon VA

Flash Flood Watch until July 23, 06:00am

Severe T-storm Watch until July 22, 10:00pm

Click here for hazard details and duration

Flash Flood Watch

...

Flash Flood Watch until July 23, 06:00am
Severe T-storm Watch until July 22, 10:00pm

NOW: Multiple
hazards in effect

Click HERE for Details
Tonight

Severe
Thunderstorms
Low: 22 °C
Tuesday

Showers
Likely
High: 26 °C
Tuesday
Night

Chance
Showers
Low: 19 °C
Wednesday

Mostly Sunny
High: 29 °C
Wednesday
Night

Partly Cloudy
Low: 19 °C
Thursday

Sunny
High: 29 °C
Thursday
Night

Mostly Clear
Low: 18 °C
Friday

Sunny
High: 31 °C

Detailed Forecast

Tonight

Showers and thunderstorms, mainly before midnight, then showers and possibly a thunderstorm after midnight. Some storms could be severe, with damaging winds, heavy rain, and frequent lightning. Low around 22. Southwest wind 10 to 13 km/h. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 cm possible.

Tuesday

Showers likely and possibly a thunderstorm. Cloudy, with a high near 26. Northwest wind 5 to 10 km/h. Chance of precipitation is 70%. New precipitation amounts between 5 and 7.5 mm possible.

Tuesday Night

A chance of showers, mainly before 11pm. Mostly cloudy, with a low around 19. Calm wind. Chance of precipitation is 30%.

Wednesday

Mostly sunny, with a high near 29. North wind 8 to 11 km/h.

Wednesday Night

Partly cloudy, with a low around 19. Calm wind.

Thursday

Sunny, with a high near 29.

Thursday Night

Mostly clear, with a low around 18.

Friday

Sunny, with a high near 31.