Forecast Details for Chicago, IL

Your Recent Locations:  Chicago, IL  
Overnight: Clear, with a low around 30. Calm wind.
Sunday: Sunny, with a high near 48. Light and variable wind becoming east 5 to 10 mph in the afternoon. Winds could gust as high as 15 mph.
Sunday Night: Mostly clear, with a low around 34. Northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Monday: Partly sunny, with a high near 39. Breezy, with an east northeast wind 15 to 20 mph, with gusts as high as 30 mph.
Monday Night: Partly cloudy, with a low around 28. Blustery, with a northeast wind around 20 mph, with gusts as high as 30 mph.
Tuesday: Mostly sunny, with a high near 37.
Tuesday Night: Mostly cloudy, with a low around 27.
Wednesday: Partly sunny, with a high near 37.
Wednesday Night: Partly cloudy, with a low around 28.
Thursday: Mostly sunny, with a high near 39.
Thursday Night: Mostly clear, with a low around 31.
Friday: A chance of rain. Mostly sunny, with a high near 40.
Friday Night: A chance of rain and snow. Mostly cloudy, with a low around 33.
Saturday: Rain and snow likely. Mostly cloudy, with a high near 38.

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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

The Current National Weather Forecast and National Weather Map are shown below.

Todays 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

Amazing Weather Videos (updated daily)

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Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

shelf clouds Next Topic: Wall Clouds

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: Wall Clouds

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

condensation Next Topic: Drizzle

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Drizzle