Forecast Details for Granite City, IL

Recent Locations: Granite City, IL  
Tonight: Mostly clear, with a low around 44. East wind 6 to 8 mph.
Thursday: Increasing clouds, with a high near 68. East wind 6 to 10 mph.
Thursday Night: Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 54. Southeast wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Friday: Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. High near 76. Breezy, with a southeast wind 16 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 80%.
Friday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 67. Breezy, with a south wind 21 to 25 mph, with gusts as high as 39 mph. Chance of precipitation is 70%.
Saturday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 81. Breezy.
Saturday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Breezy.
Sunday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. Breezy.
Sunday Night: Showers and thunderstorms. Low around 64. Breezy. Chance of precipitation is 80%.
Monday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77.
Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Tuesday: Sunny, with a high near 79.
Tuesday Night: Mostly clear, with a low around 58.
Wednesday: Sunny, with a high near 85.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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Tomorrows National Weather Map

North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

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

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