Forecast Details for Chicago, IL

Recent Locations: Chicago, IL  
Overnight: Mostly clear, with a low around 50. West northwest wind around 5 mph.
Saturday: Sunny, with a high near 71. Light south wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 63. South wind around 10 mph, with gusts as high as 20 mph.
Sunday: A slight chance of sprinkles after noon. Mostly sunny, with a high near 86. Breezy, with a south wind 15 to 25 mph, with gusts as high as 35 mph.
Sunday Night: Partly cloudy, with a low around 71. Breezy, with a south wind 15 to 20 mph, with gusts as high as 30 mph.
Memorial Day: Mostly sunny, with a high near 90. Breezy.
Monday Night: Mostly clear, with a low around 71. Breezy.
Tuesday: Mostly sunny, with a high near 89.
Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Wednesday: A chance of showers after 1pm. Partly sunny, with a high near 74.
Wednesday Night: A chance of showers. Mostly cloudy, with a low around 59.
Thursday: Mostly sunny, with a high near 70.
Thursday Night: Mostly clear, with a low around 57.
Friday: Sunny, with a high near 70.

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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.

Today's 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

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Condensation Next Topic: Contrails

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: Contrails

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