Weather Alert in Iowa
Winter Weather Advisory issued February 19 at 2:41AM CST until February 20 at 6:00AM CST by NWS La Crosse WI
AREAS AFFECTED: Allamakee; Fayette; Clayton; Monroe; Juneau; Adams; Vernon; Crawford; Richland; Grant
DESCRIPTION: ...A QUICK HITTING BAND OF HEAVY SNOW TONIGHT WILL LEAD TO SLIPPERY TRAVEL CONDITIONS... .A band of snow develops across northeast Iowa into southwest Wisconsin this evening and lasts through the overnight, departing around sunrise. The snow will be heavy at times with rates exceeding 1" per hour and quickly lead 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, making this snowfall forecast on the challenging side. Any small changes to the placement of the snow band could change forecast snow amounts at a given location very quickly. * WHAT...Snow with total accumulations between 2 and 5 inches. A narrow corridor of 6 inches is possible within the advisory, but confidence in its placement is low at this time. * WHERE...Portions of northeast Iowa and central, southwest, and west central Wisconsin. * WHEN...From 8 PM this evening to 6 AM CST Friday. * IMPACTS...Plan on slippery road conditions.
INSTRUCTION: Slow down and use caution while traveling. In Iowa, visit 511ia.org for road conditions. In Wisconsin, visit 511wi.gov for road conditions.
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North America Water Vapor (Moisture)
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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
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
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