Forecast Details for Grantsburg, IL

Recent Locations: Dingle, ID Grantsburg, IL

This Afternoon: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 79. Southwest wind around 10 mph, with gusts as high as 20 mph.

Tonight: A slight chance of thunderstorms before 7pm. Mostly cloudy, with a low around 67. South wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 10%.

Thursday: A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly cloudy, with a high near 81. South wind 10 to 17 mph, with gusts as high as 31 mph.

Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 65. South southwest wind 6 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

Friday: Showers likely before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 82. South wind 6 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

Friday Night: Showers likely, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 63. South wind around 7 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

Saturday: Showers and possibly a thunderstorm. High near 72. South southwest wind 7 to 10 mph becoming west in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%.

Saturday Night: A chance of showers before 1am. Mostly cloudy, with a low around 42. Northwest wind around 6 mph.

Sunday: Sunny, with a high near 61. Northwest wind 3 to 8 mph.

Sunday Night: Clear, with a low around 37. North northwest wind around 5 mph becoming calm in the evening.

Monday: Sunny, with a high near 67. Calm wind becoming northwest around 5 mph.

Monday Night: Partly cloudy, with a low around 43. Calm wind.

Tuesday: Mostly sunny, with a high near 61. North northeast wind 3 to 6 mph.

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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 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