Forecast Details for Salem, IL

Recent Locations: Salem, IL

Current Alerts for Salem, IL: Flood Warning

Today: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Cloudy, with a high near 81. Southwest wind 14 to 16 mph, with gusts as high as 23 mph.

Tonight: Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Low around 64. Southwest wind around 10 mph. Chance of precipitation is 90%.

Thursday: A chance of showers and thunderstorms before 7am, then showers likely between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Cloudy through mid morning, then gradual clearing, with a high near 80. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

Thursday Night: Mostly clear, with a low around 59. Southwest wind around 6 mph becoming calm in the evening.

Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 20 mph.

Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 70%.

Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 70. Chance of precipitation is 60%.

Saturday Night: A chance of rain showers before 4am, then a slight chance of rain and snow showers. Partly cloudy, with a low around 40. Chance of precipitation is 30%.

Sunday: Sunny, with a high near 61.

Sunday Night: Clear, with a low around 39.

Monday: Sunny, with a high near 67.

Monday Night: Mostly clear, with a low around 48.

Tuesday: Mostly sunny, with a high near 74.

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 is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds