Forecast Details for Chicago, IL

Your Recent Locations:  Chicago, IL  
Today: A chance of showers and thunderstorms. Areas of fog. Otherwise, cloudy, with a high near 46. North northeast wind 5 to 10 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 50%.
Tonight: Rain showers likely before 2am, then snow showers likely, possibly mixed with rain between 2am and 3am, then snow showers likely after 3am. Cloudy, with a low around 28. Blustery, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday: A 50 percent chance of snow showers before noon. Mostly cloudy, with a high near 30. Blustery, with a west northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Saturday Night: Partly cloudy, with a low around 24. West northwest wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 25 mph.
Sunday: Partly sunny, with a high near 44. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 30 mph.
Sunday Night: Mostly cloudy, with a low around 32.
Monday: Partly sunny, with a high near 46.
Monday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 39.
Tuesday: Rain likely, mainly after noon. Cloudy, with a high near 54.
Tuesday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 38.
Wednesday: A chance of rain. Mostly cloudy, with a high near 44.
Wednesday Night: Mostly cloudy, with a low around 28.
Thursday: A chance of rain and snow. Mostly sunny, with a high near 39.

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Weather Topic: What are Hole Punch Clouds?

Home - Education - Cloud Types - Hole Punch Clouds

hole punch clouds Next Topic: Mammatus Clouds

A hole punch cloud is an unusual occurrence when a disk-shaped hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.

When part of the cloud forms ice crystals, water droplets in the surrounding area of the cloud evaporate. The effect of this process produces a large elliptical gap in the cloud. The hole punch cloud formation is rare, but it is not specific to any geographic area.

Other names which have been used to describe this phenomena include fallstreak hole, skypunch, and cloud hole.

Next Topic: Mammatus Clouds

Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

shelf clouds Next Topic: Wall Clouds

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: Wall Clouds