Weather Alert in Iowa
Winter Weather Advisory issued February 18 at 2:43PM CST until February 20 at 6:00AM CST by NWS Des Moines IA
AREAS AFFECTED: Winnebago; Worth; Hancock; Cerro Gordo; Wright; Franklin; Hamilton
DESCRIPTION: ...ACCUMULATING SNOWFALL WILL IMPACT TRAVEL FROM LATE THURSDAY INTO FRIDAY... .Precipitation will spread from western into northern and parts of central Iowa on Thursday afternoon and evening. Initially, it may begin as rain or a mix before changing to snow. Generally light to moderate snow accumulations are expected by Friday morning, but a narrow band of heavy snowfall may be possible. * WHAT...Snow expected. Total snow accumulations between 2 and 5 inches. * WHERE...Portions of north central Iowa. * WHEN...From 6 PM Thursday to 6 AM CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Friday morning commute.
INSTRUCTION: Slow down and use caution while traveling. For the latest travel conditions, check the Iowa 511 app, www.511ia.org, or dial 511.
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Current U.S. National Radar--Current
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National Weather Forecast--Current
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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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