Weather Alert in Iowa
Severe Thunderstorm Warning issued March 30 at 9:11PM CDT until March 30 at 10:00PM CDT by NWS Des Moines IA
AREAS AFFECTED: Boone, IA; Dallas, IA; Greene, IA; Guthrie, IA; Polk, IA
DESCRIPTION: SVRDMX The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Western Polk County in central Iowa... Southeastern Greene County in west central Iowa... Eastern Guthrie County in west central Iowa... Southwestern Boone County in central Iowa... Dallas County in central Iowa... * Until 1000 PM CDT. * At 911 PM CDT, a severe thunderstorm was located over Linden, or 11 miles east of Guthrie Center, moving east at 40 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Des Moines, West Des Moines, Urbandale, Johnston, Clive, Waukee, Grimes, Perry, Adel, Windsor Heights, Madrid, Stuart, Dallas Center, Earlham, Granger, Panora, De Soto, Woodward, Van Meter, and Jordan Creek Town Center. This includes the following highways... Interstate 35 between mile markers 68 and 72. Interstate 80 between mile markers 99 and 130. Interstate 235 between mile markers 1 and 4.
INSTRUCTION: For your protection move to an interior room on the lowest floor of a building. Large hail, damaging wind, and continuous cloud to ground lightning are occurring with this storm. Move indoors immediately. Lightning is one of nature's leading killers. Remember, if you can hear thunder, you are close enough to be struck by lightning.
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Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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