Forecast Details for Chicago O'Hare International Airport, IL

Today: Partly sunny, with a high near 53. North wind 5 to 10 mph becoming east in the afternoon.
Tonight: Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Low around 43. East wind around 10 mph becoming south after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday: A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly cloudy, with a high near 57. Southwest wind 10 to 15 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Saturday Night: Mostly cloudy, with a low around 39. North wind 5 to 10 mph becoming east northeast after midnight.
Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 49. East wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.
Sunday Night: Showers and possibly a thunderstorm. Low around 43. Chance of precipitation is 80%.
Monday: Showers and possibly a thunderstorm. High near 51. Chance of precipitation is 90%.
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: Mostly cloudy, with a low around 34.
Wednesday: Partly sunny, with a high near 49.
Wednesday Night: Partly cloudy, with a low around 34.
Thursday: Sunny, with a high near 55.

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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

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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 Evaporation?

Home - Education - Precipitation - Evaporation

Evaporation Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog

Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain