Forecast Details for Island Lake, IL

Recent Locations: Center Junction, IA Richmond, KY Island Lake, IL

Today: A slight chance of showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 53. Northeast wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: Rain showers before 5am, then rain likely, possibly mixed with snow showers. Some thunder is also possible. Low around 33. Breezy, with a northeast wind 10 to 20 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

Friday: Snow likely before noon. Mostly cloudy, with a high near 39. Breezy, with a west wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Friday Night: Mostly cloudy, with a low around 25. West wind 10 to 15 mph, with gusts as high as 20 mph.

Saturday: Mostly cloudy, with a high near 37. West northwest wind around 10 mph, with gusts as high as 20 mph.

Saturday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 24.

Sunday: A 20 percent chance of snow before noon. Mostly cloudy, with a high near 32.

Sunday Night: Mostly cloudy, with a low around 18.

Monday: Mostly sunny, with a high near 31.

Monday Night: Partly cloudy, with a low around 17.

Tuesday: Mostly sunny, with a high near 40.

Tuesday Night: Mostly cloudy, with a low around 31.

Wednesday: Mostly cloudy, with a high near 48.

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