Forecast Details for Chicago Heights, IL

Recent Locations: Creston, WA Surfside, CA Chicago Heights, IL

Current Alerts for Chicago Heights, IL: Dense Fog Advisory Flood Warning

Overnight: Widespread dense fog. Otherwise, mostly cloudy, with a low around 52. East southeast wind around 5 mph.

Friday: Widespread dense fog, mainly before 8am. Otherwise, mostly sunny, with a high near 81. Breezy, with a south southeast wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph.

Friday Night: Showers and thunderstorms before 3am, then showers likely. Some of the storms could produce heavy rainfall. Low around 46. Breezy, with a south wind 15 to 20 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

Saturday: A 30 percent chance of showers, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a high near 51. West northwest wind around 15 mph, with gusts as high as 25 mph.

Saturday Night: Areas of frost after 5am. Otherwise, mostly clear, with a low around 35. West northwest wind 5 to 15 mph, with gusts as high as 25 mph.

Sunday: Areas of frost before 7am. Otherwise, mostly sunny, with a high near 51.

Sunday Night: Areas of frost after 2am. Otherwise, mostly clear, with a low around 34.

Monday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 56.

Monday Night: Partly cloudy, with a low around 46.

Tuesday: Mostly sunny, with a high near 73.

Tuesday Night: Partly cloudy, with a low around 53.

Wednesday: Mostly sunny, with a high near 74.

Wednesday Night: Partly cloudy, with a low around 53.

Thursday: Mostly sunny, with a high near 79.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

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).

National Weather Forecast--Current

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

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 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