Weather Alert in Iowa
Winter Storm Warning issued February 19 at 2:45PM CST until February 20 at 6:00AM CST by NWS Des Moines IA
AREAS AFFECTED: Webster; Crawford; Carroll; Greene; Boone; Audubon; Guthrie; Dallas; Cass
DESCRIPTION: Precipitation will spread from western into central Iowa this afternoon and evening. Initially, it may begin as a rain/snow mix across southern and western Iowa before changing to snow. A band of 5 to 8 inches of snow is expected by Friday morning from western through central to northeastern Iowa. There will be a sharp gradient of snowfall on either side of the heaviest band of snow. Snow rates may exceed 1" per hour at times this evening leading to rapid snow accumulations on roads and slick travel conditions. A small change in the location of the band could alter forecast snow amounts. * WHAT...Heavy snow expected. Total snow accumulations between 5 and 8 inches. * WHERE...Portions of western and central Iowa. * WHEN...Until 6 AM CST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday evening commute. Heavy snow with breezy winds could lead to isolated power outages.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. For the latest travel conditions, check the Iowa 511 app, www.511ia.org, or dial 511.
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Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
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