Forecast Details for Chicago Heights, IL

Recent Locations: Chicago Heights, IL

Today: Rain and thunderstorms before 4pm, then a chance of showers and thunderstorms, mainly after 5pm. High near 59. Southwest wind around 15 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 10pm. Mostly cloudy, with a low around 38. West southwest wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday: Partly sunny, with a high near 46. North wind around 15 mph, with gusts as high as 20 mph.

Wednesday Night: Widespread frost, mainly after midnight. Otherwise, increasing clouds, with a low around 33. North northeast wind 5 to 10 mph.

Thursday: Areas of frost before 8am. Otherwise, sunny, with a high near 61. Southeast wind 5 to 10 mph.

Thursday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 45.

Friday: Showers likely, then showers and possibly a thunderstorm after 1pm. High near 67. Breezy. Chance of precipitation is 80%.

Friday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 61. Breezy.

Saturday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 77. Breezy.

Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. Breezy.

Sunday: Showers likely. Mostly cloudy, with a high near 76. Breezy.

Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Breezy.

Monday: A chance of showers. Partly sunny, with a high near 68. Breezy.

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 Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds