Forecast Details for Waukegan, IL

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Today: Scattered snow showers between 9am and 3pm. Cloudy, with a high near 30. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

Tonight: Snow showers likely, possibly mixed with freezing rain and sleet after 3am, becoming all snow after 5am. Mostly cloudy, with a low around 29. Southwest wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. Little or no ice accumulation expected. New snow and sleet accumulation of less than a half inch possible.

Friday: A chance of snow showers, freezing rain, and sleet before 9am, then scattered snow showers after noon. Mostly cloudy, with a high near 36. Breezy, with a north northwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 50%.

Friday Night: Mostly clear, with a low around 9. Wind chill values as low as -5. Blustery, with a north wind 15 to 20 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 30 mph.

Saturday: Mostly sunny, with a high near 23. North northwest wind 5 to 10 mph becoming light and variable.

Saturday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 18.

Sunday: Mostly cloudy, with a high near 32.

Sunday Night: Partly cloudy, with a low around 23.

Monday: Partly sunny, with a high near 41.

Monday Night: Mostly cloudy, with a low around 30.

Tuesday: Mostly sunny, with a high near 40.

Tuesday Night: A chance of rain. Mostly cloudy, with a low around 30.

Wednesday: A chance of rain. Mostly cloudy, with a high near 35.

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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)

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Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds