Forecast Details for Reston, VA

Recent Locations: Reston, VA  
This Afternoon: Isolated showers. Partly sunny, with a high near 66. Northwest wind around 15 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Tonight: Partly cloudy, with a low around 48. North wind around 5 mph becoming calm in the evening.
Monday: Mostly sunny, with a high near 76. South wind 3 to 8 mph.
Monday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 58. South wind 7 to 9 mph. Chance of precipitation is 20%.
Tuesday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 71. South wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Tuesday Night: Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 90%.
Wednesday: Showers, with thunderstorms also possible after 5pm. High near 69. Chance of precipitation is 80%.
Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 60. Chance of precipitation is 40%.
Thursday: Partly sunny, with a high near 75.
Thursday Night: Partly cloudy, with a low around 59.
Friday: A chance of showers. Mostly cloudy, with a high near 75. Chance of precipitation is 30%.
Friday Night: Showers likely. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Saturday: A chance of showers. Mostly cloudy, with a high near 70. Chance of precipitation is 50%.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

North American Water Vapor Map

Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Cirrus Clouds Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Contrails Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds