Forecast Details for Chantilly, VA

Recent Locations: Chantilly, VA  
Overnight: Rain with areas of drizzle. Patchy fog. Low around 52. East wind around 7 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.
Sunday: Rain with areas of drizzle before 8am, then rain between 8am and 2pm, then a chance of showers after 2pm. Patchy fog before 8am. High near 69. South wind 5 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night: A chance of showers, mainly before 1am. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 63. Southeast wind around 7 mph. Chance of precipitation is 40%.
Monday: A chance of showers and thunderstorms after 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 81. West wind around 5 mph. Chance of precipitation is 40%.
Monday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 62. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.
Tuesday: A slight chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 50%.
Tuesday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Wednesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 50%.
Thursday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 79. Chance of precipitation is 80%.
Thursday Night: Showers and thunderstorms. Low around 60. Chance of precipitation is 80%.
Friday: A chance of showers. Mostly sunny, with a high near 76. Chance of precipitation is 50%.
Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 54. Chance of precipitation is 40%.
Saturday: A chance of showers. Mostly sunny, with a high near 69. Chance of precipitation is 40%.

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Current U.S. National Radar--Current

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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.

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Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds