Forecast Details for Marion, IL

Recent Locations: Evinston, FL Iselin, NJ Marion, IL

Current Alerts for Marion, IL: Special Weather Statement

Today: Increasing clouds, with a high near 50. Breezy, with a south southwest wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 36 mph.

Tonight: Mostly cloudy, with a low around 40. South southwest wind 13 to 18 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 29 mph.

Wednesday: Mostly cloudy, with a high near 57. Light and variable wind becoming northwest around 5 mph.

Wednesday Night: A 50 percent chance of showers, mainly after midnight. Mostly cloudy, with a low around 40. East southeast wind 3 to 6 mph.

Thursday: A 40 percent chance of showers before noon. Partly sunny, with a high near 54. East northeast wind 6 to 9 mph becoming north in the afternoon.

Thursday Night: Partly cloudy, with a low around 31. North wind around 5 mph becoming calm in the evening.

Friday: Sunny, with a high near 62. Calm wind becoming south southwest 5 to 7 mph in the morning.

Friday Night: Mostly clear, with a low around 40. South wind around 6 mph.

Saturday: Sunny, with a high near 67. South southwest wind 5 to 9 mph.

Saturday Night: Partly cloudy, with a low around 35. South southwest wind 7 to 9 mph becoming north northeast after midnight.

Sunday: A slight chance of showers. Partly sunny, with a high near 50. Northeast wind around 10 mph, with gusts as high as 18 mph.

Sunday Night: A chance of showers. Mostly cloudy, with a low around 35. East northeast wind around 9 mph.

Monday: A chance of showers. Mostly cloudy, with a high near 54. East wind 8 to 10 mph, with gusts as high as 18 mph.

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

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 Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - 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