Forecast Details for Joliet, IL

Recent Locations: Round Rock, TX McAllen, TX Joliet, IL

Current Alerts for Joliet, IL: Special Weather Statement

Tonight: A slight chance of snow between 2am and 3am, then snow and freezing rain likely. Cloudy, with a low around 27. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. Little or no ice accumulation expected. Total nighttime snow accumulation of less than a half inch possible.

Friday: Drizzle, snow, and freezing rain likely before 9am, then a slight chance of snow showers after 3pm. Cloudy, with a high near 39. Breezy, with a north northwest wind 10 to 15 mph increasing to 15 to 20 mph in the morning. Winds could gust as high as 35 mph. Chance of precipitation is 60%. Little or no ice accumulation expected. Little or no snow accumulation expected.

Friday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 10. Wind chill values as low as -1. North wind 10 to 15 mph, with gusts as high as 25 mph.

Saturday: Mostly sunny, with a high near 25. Wind chill values as low as -1. North wind around 5 mph becoming south southeast in the afternoon. Winds could gust as high as 15 mph.

Saturday Night: Mostly cloudy, with a low around 18. South southeast wind around 5 mph, with gusts as high as 15 mph.

Sunday: Partly sunny, with a high near 34.

Sunday Night: Mostly cloudy, with a low around 21.

Monday: Partly sunny, with a high near 43.

Monday Night: Partly cloudy, with a low around 30.

Tuesday: Mostly sunny, with a high near 53.

Tuesday Night: A chance of rain. Mostly cloudy, with a low around 36.

Wednesday: A chance of rain. Cloudy, with a high near 44.

Wednesday Night: A chance of rain. Cloudy, with a low around 29.

Thursday: A chance of rain and snow. Mostly cloudy, with a high near 40.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails

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