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

Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Current conditions at

Washington/Reagan National Airport, DC (KDCA)

Lat: 38.85°NLon: 77.03°WElev: 13ft.

A Few Clouds

80°F

27°C

Humidity 51%
Wind Speed NE 8 mph
Barometer 29.98 in (1015.2 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 6 Sep 11:52 am EDT
Extended Forecast for

McLean VA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 84. Northeast wind around 8 mph.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.

    Low: 64 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Mostly sunny, with a high near 83. North wind 3 to 5 mph.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 62. Light southeast wind.

    Low: 62 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 40%.

    High: 89 °F

    Sunny then
    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 84. Northeast wind around 8 mph.
Tonight
Partly cloudy, with a low around 64. Northeast wind around 5 mph becoming calm in the evening.
Labor Day
Mostly sunny, with a high near 83. North wind 3 to 5 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 62. Light southeast wind.
Tuesday
Mostly sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
Mostly sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 63.
Saturday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
McLean VA
 38.93°N 77.19°W (Elev. 299 ft)
Last Update:
10:53 am EDT Sep 6, 2026
Forecast Valid:
12pm EDT Sep 6, 2026-6pm EDT Sep 12, 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