Forecast Details for River Forest, IL

Recent Locations: River Forest, IL  
Tonight: Mostly clear, with a low around 33. North northeast wind around 5 mph.
Friday: Mostly sunny, with a high near 53. North northeast wind 5 to 10 mph becoming east in the afternoon.
Friday Night: A chance of showers before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Low around 44. East northeast wind around 10 mph becoming south southwest after midnight. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday: A chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 10am. Mostly cloudy, with a high near 60. West southwest wind 5 to 15 mph becoming northwest in the afternoon. Chance of precipitation is 30%.
Saturday Night: Mostly cloudy, with a low around 39. North wind 5 to 10 mph.
Sunday: A 50 percent chance of showers, mainly after 1pm. Mostly cloudy, with a high near 49.
Sunday Night: Showers and possibly a thunderstorm. Low around 42. Chance of precipitation is 90%.
Monday: Showers. Mostly cloudy, with a high near 52.
Monday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 40.
Tuesday: A chance of showers before 1pm. Mostly cloudy, with a high near 50.
Tuesday Night: A chance of showers. Mostly cloudy, with a low around 35.
Wednesday: Mostly sunny, with a high near 49.
Wednesday Night: Partly cloudy, with a low around 34.
Thursday: Sunny, with a high near 55.

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

Want to Receive our Free Daily Forecast Emails in your inbox by 5 a.m.?
There are no ads! Learn More
We respect your privacy and will not share or sell your email with anyone.

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 Precipitation?

Home - Education - Precipitation - 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