Forecast Details for Greenfield, IL

Recent Locations: Belgrade Lakes, ME Waconia, MN Greenfield, IL

This Afternoon: Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms after 3pm. Cloudy, with a high near 51. East wind around 11 mph. Chance of precipitation is 70%.

Tonight: Showers and thunderstorms before 4am, then a chance of showers. Temperature falling to near 50 by 8pm, then rising to around 59 during the remainder of the night. East wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.

Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 74. Breezy, with a south wind 18 to 25 mph, with gusts as high as 39 mph. Chance of precipitation is 50%.

Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 58. Breezy, with a southwest wind 15 to 20 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 60%.

Friday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 80. South wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

Friday Night: Showers and possibly a thunderstorm. Low around 50. Chance of precipitation is 90%.

Saturday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 60. Chance of precipitation is 60%.

Saturday Night: Partly cloudy, with a low around 36.

Sunday: Sunny, with a high near 55.

Sunday Night: Clear, with a low around 35.

Monday: Sunny, with a high near 62.

Monday Night: Partly cloudy, with a low around 36.

Tuesday: Mostly sunny, with a high near 56.

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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 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