Forecast Details for Sullivan, IL

Recent Locations: Addison, IL Clark, SD Sullivan, IL

Current Alerts for Sullivan, IL: Wind Advisory

Today: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. High near 74. Breezy, with a south wind 24 to 28 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely before 1am, then a chance of showers between 1am and 4am. Mostly cloudy, with a low around 57. Breezy, with a south wind 18 to 23 mph decreasing to 9 to 14 mph after midnight. Winds could gust as high as 38 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Friday: A 40 percent chance of showers and thunderstorms, mainly between 2pm and 4pm. Mostly cloudy, with a high near 76. South wind 7 to 15 mph, with gusts as high as 24 mph.

Friday Night: Showers and possibly a thunderstorm, mainly after 7pm. Low around 56. South wind 13 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Saturday: Showers and possibly a thunderstorm. High near 65. West wind 14 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. West northwest wind 11 to 15 mph, with gusts as high as 23 mph.

Sunday: Mostly sunny, with a high near 53. West northwest wind 11 to 15 mph, with gusts as high as 23 mph.

Sunday Night: Mostly clear, with a low around 37.

Monday: Sunny, with a high near 56.

Monday Night: Mostly clear, with a low around 32.

Tuesday: Sunny, with a high near 50.

Tuesday Night: Partly cloudy, with a low around 34.

Wednesday: Mostly sunny, with a high near 63.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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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.

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds

Weather Topic: What is Drizzle?

Home - Education - Precipitation - Drizzle

Drizzle Next Topic: Evaporation

Drizzle is precipitation in the form of water droplets which are smaller than raindrops.

Drizzle is characterized by fine, gently falling droplets and typically does not impact human habitation in a negative way. The exception to this is freezing drizzle, a condition where drizzle freezes immediately upon reaching earth's surface. Freezing drizzle is still less dangerous than freezing rain, but can potentially result in hazardous road conditions.

Next Topic: Evaporation