Forecast Details for Salem, IL

Recent Locations: Sebree, KY Broadview, IL Salem, IL

Current Alerts for Salem, IL: Wind Advisory

Today: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then showers and thunderstorms likely after 4pm. Cloudy, with a high near 77. Breezy, with a south wind 20 to 26 mph, with gusts as high as 44 mph. Chance of precipitation is 70%.

Tonight: A chance of showers and thunderstorms before 10pm, then showers likely and possibly a thunderstorm between 10pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy during the early evening, then becoming mostly clear, with a low around 64. Breezy, with a south wind 16 to 21 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 60%.

Friday: A chance of showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80. South wind 8 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 61. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

Saturday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 66. Southwest wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 90%.

Saturday Night: Partly cloudy, with a low around 40.

Sunday: Sunny, with a high near 56.

Sunday Night: Clear, with a low around 37.

Monday: Sunny, with a high near 63.

Monday Night: Partly cloudy, with a low around 38.

Tuesday: Mostly sunny, with a high near 58.

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

Wednesday: Mostly sunny, with a high near 66.

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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 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

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