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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North America Water Vapor (Moisture)
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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
Weather Topic: What are Cirrostratus Clouds?
Home - Education - Cloud Types - Cirrostratus Clouds
Next Topic: Cirrus Clouds
Cirrostratus clouds are high, thin clouds that form above
20,000 feet and are made mostly of ice crystals. They sometimes look like giant
feathers, horse tails, or curls of hair in the sky.
These clouds are pushed by the jet stream and can move at high speeds reaching
100 mph.
What do they indicate?
They indicate that a precipitation is likely within 24 hours.
Next Topic: Cirrus Clouds
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