Forecast Details for Rockford, IL

Recent Locations: Hayward, CA Tucson, AZ Rockford, IL

Today: Scattered snow showers between 9am and noon. Mostly cloudy, with a high near 33. South southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.

Tonight: A chance of freezing rain and sleet, mainly after 3am. Mostly cloudy, with a low around 29. West wind 5 to 10 mph. Chance of precipitation is 50%.

Friday: A slight chance of sleet, mixing with freezing rain after 8am, then gradually ending. Mostly cloudy, with a high near 37. Breezy, with a north northwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 20%.

Friday Night: Mostly clear, with a low around 7. Wind chill values as low as -3. North wind 5 to 15 mph, with gusts as high as 25 mph.

Saturday: Mostly sunny, with a high near 24. North northeast wind around 5 mph becoming calm.

Saturday Night: Mostly cloudy, with a low around 19.

Sunday: Mostly cloudy, with a high near 36.

Sunday Night: Partly cloudy, with a low around 23.

Monday: Partly sunny, with a high near 46.

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

Tuesday: Mostly sunny, with a high near 44.

Tuesday Night: A chance of rain. Mostly cloudy, with a low around 29.

Wednesday: A chance of rain. Mostly cloudy, with a high near 38.

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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