Weather Alert in Illinois

Recent Locations: Filion, MI   Highland, IL   Watson, IL  

Severe Thunderstorm Warning issued April 2 at 7:50PM CDT until April 2 at 8:15PM CDT by NWS Lincoln IL

AREAS AFFECTED: Tazewell, IL

DESCRIPTION: At 749 PM CDT, a severe thunderstorm was located over Morton, moving northeast at 50 mph. HAZARD...Ping pong ball size hail and 60 mph wind gusts. SOURCE...Radar indicated. IMPACT...People and animals outdoors will be injured. Expect hail damage to roofs, siding, windows, and vehicles. Expect wind damage to roofs, siding, and trees. This severe storm will be near... East Peoria, Morton, and Washington around 755 PM CDT. Other locations impacted by this severe thunderstorm include Groveland and North Pekin. This includes the following highways... Interstate 155 between mile markers 27 and 31. Interstate 474 between mile markers 11 and 14. Interstate 74 between mile markers 95 and 109.

INSTRUCTION: A Tornado Watch remains in effect until 1100 PM CDT for central Illinois. For your protection move to an interior room on the lowest floor of a building.

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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

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

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