Weather Alert in Iowa
Special Weather Statement issued April 28 at 10:01PM CDT by NWS Des Moines IA
AREAS AFFECTED: Clarke; Lucas; Monroe; Decatur; Wayne; Appanoose
DESCRIPTION: At 1000 PM CDT, Doppler radar was tracking the leading edge of gusty showers near Corydon, moving east at 65 mph. HAZARD...Wind gusts of 50 to 55 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Rathbun, Melrose, Mystic, Red Haw Lake State Park, Albia Municipal Airport, Pleasanton, Honey Creek State Park, Lamoni, Albia, Cincinnati, Udell, Promise City, Exline, Sharon Bluffs State Park, Clio, Centerville Municipal Airport, Decatur, Nine Eagles State Park, Lamoni Municipal Airport, and Humeston. This includes Interstate 35 between mile markers 1 and 27.
INSTRUCTION: If outdoors, consider seeking shelter inside a building. A Tornado Watch remains in effect until midnight CDT for south central Iowa.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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