Forecast Details for Reston, VA

Recent Locations: Reston, VA  
Today: Sunny, with a high near 77. South wind 5 to 9 mph.
Tonight: Partly cloudy, with a low around 60. South wind around 8 mph.
Tuesday: Showers likely, then showers and possibly a thunderstorm after 2pm. High near 69. South wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 63. Southeast wind 5 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday: Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 70. Northeast wind 5 to 8 mph. Chance of precipitation is 70%.
Wednesday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 40%.
Thursday: A chance of showers after 2pm. Mostly sunny, with a high near 75. Chance of precipitation is 30%.
Thursday Night: A chance of showers before 8pm. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Friday: A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 40%.
Friday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Saturday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.
Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Sunday: A chance of showers. Mostly sunny, with a high near 77. Chance of precipitation is 30%.

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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 Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Cumulus Clouds Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle

Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Evaporation Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog