Weather Alert in Iowa
Winter Weather Advisory issued February 19 at 9:59AM CST until February 20 at 6:00AM CST by NWS Quad Cities IA IL
AREAS AFFECTED: Buchanan; Delaware; Dubuque; Benton; Linn; Jones
DESCRIPTION: * WHAT...Snow, blowing snow and some drifting is expected. Total snow accumulations between 3 and 5 inches. Localized totals up to 6 inches are possible. Winds gusting as high as 35 mph. * WHERE...Portions of east central and northeast Iowa. * WHEN...From 6 PM this evening to 6 AM CST Friday. * IMPACTS...Plan on slippery road conditions, blowing snow and minor drifting of snow. * ADDITIONAL DETAILS...There remains the potential for higher snowfall totals in this advisory. Uncertainty in where the snow band may set up remains and a last minute upgrade to a Winter Storm Warning cannot be ruled out. Snow will initially melt on area roadways before accumulating. The highest snowfall totals will be on grassy surfaces.
INSTRUCTION: Slow down and use caution while traveling. the latest road conditions are available at 511ia.org or by calling 511.
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North America Water Vapor (Moisture)
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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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