Weather Alert in Iowa
Winter Storm Warning issued February 19 at 10:58PM CST until February 20 at 9:00AM CST by NWS La Crosse WI
AREAS AFFECTED: Howard; Winneshiek; Allamakee; Floyd; Chickasaw; Fayette; Clayton; Houston; La Crosse; Vernon; Crawford; Richland; Grant
DESCRIPTION: ...MODERATE TO HEAVY SNOW TONIGHT INTO FRIDAY MORNING... .A winter storm lifts through the region tonight and exits Friday morning. The band of heaviest snow amounts is expected to be 30 to 40 miles at most and has shifted northwestward slightly over the last few hours. The winter storm warnings and advisories have been adjusted accordingly. 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. Road conditions will deteriorate quickly in the band of heavy snow with slippery to hazardous travel conditions expected. * WHAT...Heavy snow with accumulations between 5 and 9 inches. Winds gusting as high as 40 mph. * WHERE...Portions of north central and northeast Iowa, southeast Minnesota, and southwest and west central Wisconsin. * WHEN...Until 9 AM CST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Friday morning commute. * ADDITIONAL DETAILS...There will be a sharp cutoff in snow amounts on the northwest side of this warning with impacts varying quickly in the span of a few miles. The city of La Crosse will straddle this line with impacts possibly varying substantially between the north and south sides of the city.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. 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 is Hail?
Home - Education - Precipitation - Hail
Next Topic: Hole Punch Clouds
Hail is a form of precipitation which is recognized by large solid balls or
clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind.
As the hailstones remain in the updraft, ice is deposited onto them until their
weight becomes heavy enough for them to fall to the earth's surface.
Hail storms can cause significant damage to crops, aircrafts, and man-made structures,
despite the fact that the duration is usually less than ten minutes.
Next Topic: Hole Punch Clouds
Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
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