Forecast Details for Leesburg, VA

Recent Locations: Leesburg, VA  
Tonight: Scattered showers and thunderstorms after 2am. Increasing clouds, with a low around 63. West wind 8 to 13 mph becoming light northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.
Thursday: Scattered showers and thunderstorms, then showers likely and possibly a thunderstorm after 8am. Mostly cloudy, with a high near 73. Light and variable wind becoming east 5 to 9 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 57. East wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 50%.
Friday: A chance of showers, mainly after 8am. Mostly cloudy, with a high near 66. Northwest wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 30%.
Friday Night: Mostly cloudy, with a low around 48. Northwest wind 10 to 14 mph, with gusts as high as 20 mph.
Saturday: A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 66. Chance of precipitation is 40%.
Saturday Night: A chance of showers before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 49. Chance of precipitation is 40%.
Sunday: A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 68. Chance of precipitation is 30%.
Sunday Night: A chance of thunderstorms before 8pm. Mostly clear, with a low around 48. Chance of precipitation is 30%.
Monday: Mostly sunny, with a high near 73.
Monday Night: Partly cloudy, with a low around 53.
Tuesday: A chance of showers. Mostly sunny, with a high near 77. Chance of precipitation is 30%.
Tuesday Night: A chance of showers. Mostly cloudy, with a low around 57. Chance of precipitation is 40%.
Wednesday: A chance of showers. Partly sunny, with a high near 75. Chance of precipitation is 50%.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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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

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