Weather Alert in Illinois

Recent Locations: Gorham, IL

Current Alerts for Gorham, IL: High Wind Warning Tornado Watch

Tornado Watch issued March 15 at 2:42PM CDT until March 15 at 8:00PM CDT by NWS St Louis MO

AREAS AFFECTED: Bond, IL; Calhoun, IL; Clinton, IL; Fayette, IL; Greene, IL; Jersey, IL; Macoupin, IL; Madison, IL; Marion, IL; Monroe, IL; Montgomery, IL; Pike, IL; Randolph, IL; St. Clair, IL; Washington, IL; Crawford, MO; Franklin, MO; Gasconade, MO; Iron, MO; Jefferson, MO; Lincoln, MO; Madison, MO; Montgomery, MO; Osage, MO; Pike, MO; Reynolds, MO; St. Charles, MO; Ste. Genevieve, MO; St. Francois, MO; St. Louis, MO; Warren, MO; Washington, MO; St. Louis City, MO

DESCRIPTION: TORNADO WATCH 52 REMAINS VALID UNTIL 8 PM CDT THIS EVENING FOR THE FOLLOWING AREAS IN ILLINOIS THIS WATCH INCLUDES 15 COUNTIES IN SOUTH CENTRAL ILLINOIS BOND CLINTON FAYETTE MARION MONTGOMERY WASHINGTON IN SOUTHWEST ILLINOIS CALHOUN GREENE JERSEY MACOUPIN MADISON MONROE RANDOLPH SAINT CLAIR IN WEST CENTRAL ILLINOIS PIKE IN MISSOURI THIS WATCH INCLUDES 18 COUNTIES IN CENTRAL MISSOURI OSAGE IN EAST CENTRAL MISSOURI CRAWFORD FRANKLIN GASCONADE JEFFERSON LINCOLN MONTGOMERY SAINT CHARLES SAINT LOUIS SAINT LOUIS CITY WARREN WASHINGTON IN NORTHEAST MISSOURI PIKE IN SOUTHEAST MISSOURI IRON MADISON REYNOLDS SAINT FRANCOIS SAINTE GENEVIEVE THIS INCLUDES THE CITIES OF ALTON, BELLEVILLE, BOWLING GREEN, CAHOKIA, CENTRALIA, CHESTER, EDWARDSVILLE, FARMINGTON, LITCHFIELD, PITTSFIELD, SAINT CHARLES, SAINT LOUIS, SALEM, SPARTA, SULLIVAN, UNION, VANDALIA, AND WASHINGTON.

INSTRUCTION: N/A

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Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

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