Forecast Details for Percy, IL

Recent Locations: Spring Park, MN Howe, TX Percy, IL

Today: A slight chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 81. South wind 10 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4am. Some of the storms could produce heavy rainfall. Low around 60. South wind 11 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

Saturday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. Some of the storms could produce heavy rainfall. Temperature falling to around 58 by 5pm. West wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.

Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 39. Northwest wind 6 to 11 mph, with gusts as high as 21 mph.

Sunday: Sunny, with a high near 59. Northwest wind 6 to 10 mph.

Sunday Night: Clear, with a low around 39.

Monday: Sunny, with a high near 62.

Monday Night: Partly cloudy, with a low around 35.

Tuesday: Mostly sunny, with a high near 55.

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

Wednesday: Mostly sunny, with a high near 68.

Wednesday Night: Mostly clear, with a low around 51.

Thursday: 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 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

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle