Weather Alert in Iowa
Winter Weather Advisory issued February 19 at 3:15PM CST until February 20 at 9:00AM CST by NWS La Crosse WI
AREAS AFFECTED: Howard; Winneshiek; Floyd; Chickasaw; Houston; La Crosse; Vernon
DESCRIPTION: ...BAND OF MODERATE TO HEAVY SNOW EXPECTED TONIGHT... .A band of snow develops across northeast Iowa into southwest Wisconsin this evening and lasts through the overnight, departing between sunrise and mid-morning. The snow will be heavy at times with rates exceeding 1" per hour, quickly leading to snow-covered and slippery roads. The heaviest snow is forecast to fall in a relatively narrow band with amounts quickly decreasing on either side of the band. Any small changes to the placement of the snow band could change forecast snow amounts at a given location very quickly. Confidence in heavy amounts is highest in far southwest Wisconsin into Juneau and Adams Counties and adjacent areas of northeast Iowa. Areas to the northwest from Charles City to Tomah may see a few inches of accumulation, but amounts will drop off quickly in some cases within a few miles. * WHAT...Snow expected. Total snow accumulations between 2 and 5 inches. Winds gusting as high as 35 mph. * WHERE...In northeast Iowa, Floyd, Chickasaw, Howard, and Winneshiek Counties. In southeast Minnesota, Houston County. In west central Wisconsin, La Crosse and Vernon Counties. * WHEN...From 8 PM this evening to 9 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. 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 Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Contrails
Condensation is the process which creates clouds, and therefore
it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid,
and it happens because water molecules release heat into the atmosphere and
become organized into a more closely packed structure, what we might see as
water droplets.
Water is always present in the air around us as a vapor, but it's too small for
us to see. When water undergoes the process of condensation it becomes organized
into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Contrails
Weather Topic: What are Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
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