Forecast Details for Geff, IL

Recent Locations: Pennington, AL Topping, VA Geff, IL

This Afternoon: Showers and possibly a thunderstorm, mainly before 5pm, then a chance of showers and thunderstorms after 5pm. High near 73. North wind around 7 mph. Chance of precipitation is 90%.

Tonight: A chance of showers and thunderstorms before 1am, then a slight chance of showers between 1am and 2am. Mostly cloudy, with a low around 62. East wind 5 to 11 mph becoming south after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 40%.

Thursday: A chance of showers between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 78. Breezy, with a south wind 14 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 40%.

Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Partly cloudy, with a low around 63. South wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.

Friday: Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. South southwest wind 10 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 59. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 70%.

Saturday: Showers and possibly a thunderstorm. High near 69. South southwest wind 11 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 90%.

Saturday Night: A slight chance of showers before 1am. Partly cloudy, with a low around 39. West northwest wind 9 to 11 mph, with gusts as high as 18 mph.

Sunday: Sunny, with a high near 57. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.

Sunday Night: Clear, with a low around 36. Northwest wind 3 to 7 mph.

Monday: Sunny, with a high near 63. Calm wind becoming west northwest 5 to 7 mph in the morning.

Monday Night: Partly cloudy, with a low around 40. North wind 3 to 6 mph.

Tuesday: Mostly sunny, with a high near 56. North northeast wind 6 to 9 mph.

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North America Water Vapor (Moisture)

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Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds