Forecast Details for Chicago Heights, IL

Recent Locations: Chicago Heights, IL

Current Alerts for Chicago Heights, IL: Flood Warning Freeze Warning

Overnight: Areas of frost after 3am. Otherwise, clear, with a low around 35. Southwest wind around 5 mph.

Sunday: A 30 percent chance of showers, mainly after 2pm. Areas of frost before 8am. Otherwise, increasing clouds, with a high near 50. Breezy, with a southwest wind 5 to 10 mph becoming west northwest 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

Sunday Night: A 20 percent chance of showers before 8pm. Widespread frost, mainly after 5am. Otherwise, mostly clear, with a low around 32. North northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 15 mph.

Monday: Widespread frost before 8am. Otherwise, sunny, with a high near 52. Calm wind becoming south southwest around 5 mph in the afternoon.

Monday Night: Partly cloudy, with a low around 43. South wind 5 to 10 mph, with gusts as high as 20 mph.

Tuesday: Mostly sunny, with a high near 73.

Tuesday Night: Partly cloudy, with a low around 52.

Wednesday: Sunny, with a high near 74.

Wednesday Night: Mostly clear, with a low around 56.

Thursday: Mostly sunny, with a high near 81.

Thursday Night: A chance of showers. Mostly cloudy, with a low around 62.

Friday: Showers likely. Mostly cloudy, with a high near 74.

Friday Night: A chance of showers. Mostly cloudy, with a low around 48.

Saturday: 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

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

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 is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

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