Forecast Details for Pontiac, IL

Recent Locations: Manchester, MI Corte Madera, CA Pontiac, IL

Current Alerts for Pontiac, IL: Wind Advisory

Today: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1pm. Patchy fog before 10am. High near 73. Windy, with a south wind 15 to 20 mph increasing to 25 to 30 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely, mainly before midnight. Partly cloudy, with a low around 50. Windy, with a south southwest wind 20 to 30 mph decreasing to 10 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: Showers likely and possibly a thunderstorm, mainly after 4pm. Partly sunny, with a high near 73. West wind 5 to 10 mph becoming east in the morning. Winds could gust 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.

Friday Night: Showers and possibly a thunderstorm. Low around 52. East southeast wind 10 to 15 mph becoming south southwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%.

Saturday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 63. Breezy, with a west wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

Saturday Night: Partly cloudy, with a low around 34.

Sunday: Mostly sunny, with a high near 52.

Sunday Night: Mostly clear, with a low around 35.

Monday: Mostly sunny, with a high near 57.

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

Tuesday: Mostly sunny, with a high near 52.

Tuesday Night: Mostly cloudy, with a low around 34.

Wednesday: Mostly sunny, with a high near 65. Breezy.

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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

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds