Weather Alert in Iowa
Flood Watch issued June 26 at 5:21PM CDT until June 30 at 11:30PM CDT by NWS Des Moines IA
AREAS AFFECTED: Black Hawk
DESCRIPTION: ...The Flood Watch continues for the following rivers in Iowa... Cedar River at Cedar Falls affecting Black Hawk county. Cedar River at Waterloo affecting Black Hawk county. Winnebago River at Mason City affecting Cerro Gordo, Worth and Floyd counties. Raccoon River at Des Moines Fleur Dr affecting Polk County. North Raccoon River near Perry affecting Dallas County. * WHAT...Flooding is possible. * WHERE...The Cedar River at Waterloo, or from the Waterloo-Cedar Falls city limits to Spring Creek near La Porte City. * WHEN...From Sunday morning to late Monday evening. * IMPACTS...At 13.0 feet, Many storm sewers are closed along Black Hawk Creek and the Cedar River. The Fletcher Ave levee gates are closed. * ADDITIONAL DETAILS... - At 5:00 PM CDT Thursday the stage was 8.6 feet. - Forecast...Flood stage may be reached Sunday morning. - Flood stage is 13.0 feet.
INSTRUCTION: For the latest waterway observations and forecasts refer to weather.gov/desmoines/water. River forecasts include observed precipitation plus forecast precipitation over the next 24 hours.
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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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