Weather Alert in Iowa
Winter Weather Advisory issued February 19 at 3:24AM CST until February 20 at 6:00AM CST by NWS Des Moines IA
AREAS AFFECTED: Poweshiek
DESCRIPTION: ...ACCUMULATING SNOWFALL WILL IMPACT TRAVEL FROM LATE THURSDAY INTO FRIDAY... .Precipitation will spread from western into central Iowa on Thursday afternoon and evening. Initially, it may begin as rain or a rain/snow mix before changing to snow. Light to moderate snow accumulations are expected by Friday morning, but a narrow band of heavier snowfall is expected with amounts quickly decreasing on either side of the band. Snow rates may near or exceed 1" per hour at times leading to quickly accumulating snow on roads and slick travel conditions. A small change in the location of the band could alter forecast snow amounts. * WHAT...Snow expected. Total snow accumulations between 2 and 4 inches. * WHERE...Poweshiek County. * WHEN...From 6 PM this evening to 6 AM CST Friday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Thursday evening commute. * ADDITIONAL DETAILS...Snow amounts may vary significantly within any one county.
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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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
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
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