Forecast Details for Glen Carbon, IL

Recent Locations: Glen Carbon, IL

Tonight: Mostly cloudy, with a low around 55. Northwest wind around 8 mph.

Sunday: Partly sunny, with a high near 73. North wind 5 to 7 mph.

Sunday Night: Showers likely before 1am, then showers likely and possibly a thunderstorm between 1am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 62. East wind 5 to 7 mph. Chance of precipitation is 70%.

Monday: A chance of showers before 7am, then a chance of rain between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 78. Southeast wind 7 to 10 mph. Chance of precipitation is 50%.

Monday Night: Showers and thunderstorms likely, mainly after 1am. Partly cloudy, with a low around 67. Southeast wind 9 to 11 mph. Chance of precipitation is 60%.

Tuesday: Showers and thunderstorms likely. Partly sunny, with a high near 83. Breezy. Chance of precipitation is 70%.

Tuesday Night: Showers and thunderstorms likely, mainly before 1am. Partly cloudy, with a low around 62. Chance of precipitation is 60%.

Wednesday: Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 83. Chance of precipitation is 70%.

Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.

Thursday: A 20 percent chance of showers after 1pm. Sunny, with a high near 77.

Thursday Night: A 20 percent chance of showers. Partly cloudy, with a low around 55.

Friday: A 20 percent chance of showers. Sunny, with a high near 69.

Friday Night: Mostly clear, with a low around 51.

Saturday: A 20 percent chance of showers. Mostly sunny, with a high near 69.

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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 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

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds