Weather Alert in Iowa
Winter Weather Advisory issued February 20 at 5:17AM CST until February 20 at 9:00AM CST by NWS La Crosse WI
AREAS AFFECTED: Mitchell; Winona; Fillmore; Clark; Trempealeau; Jackson
DESCRIPTION: ...MODERATE TO HEAVY SNOW EARLY THIS MORNING... .A winter storm is impacting the region early this morning and gradually winds down later this morning. The band of heaviest snow amounts is expected to be 30 to 40 miles wide at most. There will be a very sharp cutoff in amounts on the northwest side of the snow band with impacts varying greatly in the span of just a few miles. Travel will be hazardous in the areas that see the heaviest snow!. * WHAT...Snow with accumulations of 3 to 5 inches. Winds gusting as high as 35 mph. * WHERE...Portions of north central Iowa, southeast Minnesota, and central and west central Wisconsin. * WHEN...Until 9 AM CST this morning. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Friday morning commute.
INSTRUCTION: Slow down and use caution while traveling. In Iowa, visit 511ia.org for road conditions. In Minnesota, visit 511mn.org for road conditions. In Wisconsin, visit 511wi.gov for road conditions.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - 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
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