Forecast Details for Sterling, VA

Recent Locations: Sterling, VA  
Today: Showers, with thunderstorms also possible after 2pm. High near 58. East wind 7 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight: Showers. Low around 54. East wind around 9 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday: Showers, with thunderstorms also possible after 2pm. High near 72. South wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 63. South wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 81. Southwest wind around 5 mph. Chance of precipitation is 60%.
Monday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Tuesday: Showers likely, mainly after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Tuesday Night: Showers likely before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Wednesday: A chance of showers after 2pm. Partly sunny, with a high near 87. Chance of precipitation is 40%.
Wednesday Night: A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 82. Chance of precipitation is 70%.
Thursday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 77. Chance of precipitation is 60%.

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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

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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