Forecast Details for Creve Coeur, IL

Recent Locations: Olpe, KS Roxbury, PA Creve Coeur, IL

Overnight: Showers and possibly a thunderstorm. Low around 42. East northeast wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday: Showers and possibly a thunderstorm before 9am, then a chance of showers between 9am and 4pm, then a chance of showers and thunderstorms after 4pm. High near 51. East northeast wind 11 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: Showers and possibly a thunderstorm, mainly before 3am, then a chance of showers and thunderstorms after 3am. Temperature falling to near 47 by 8pm, then rising to around 54 during the remainder of the night. East northeast wind around 11 mph becoming southeast after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7am. High near 74. Breezy, with a south wind 14 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night: Showers likely and possibly a thunderstorm before 10pm, then showers likely between 10pm and 1am. Partly cloudy, with a low around 53. Southwest wind 12 to 17 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: A chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Partly sunny, with a high near 78. Light south wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 50%.

Friday Night: Showers, with thunderstorms also possible after 7pm. Low around 52. South wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.

Saturday Night: Mostly cloudy, with a low around 35.

Sunday: Mostly sunny, with a high near 53.

Sunday Night: Mostly clear, with a low around 34.

Monday: Mostly sunny, with a high near 61.

Monday Night: Partly cloudy, with a low around 37.

Tuesday: Mostly sunny, with a high near 55.

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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