Weather Alert in Wisconsin
Special Weather Statement issued April 3 at 9:15PM CDT by NWS Milwaukee/Sullivan WI
AREAS AFFECTED: Jefferson; Waukesha; Rock; Walworth
DESCRIPTION: At 914 PM CDT, Doppler radar was tracking strong thunderstorms along a line extending from near Lake Koshkonong to 6 miles east of Milton to near Delavan to near Elkhorn. Movement was northeast at 40 mph. HAZARD...Penny size hail. SOURCE...Radar indicated. IMPACT...Minor hail damage to vegetation is possible. Locations impacted include... Waukesha, New Berlin, Watertown, Whitewater, Pewaukee, Fort Atkinson, Elkhorn, Hartland, Jefferson, Mukwonago, Delafield, Milton, East Troy, Wales, Okauchee Lake, Oconomowoc, Vernon, Ottawa, Johnson Creek, and Dousman. This includes the following highways... U.S. Highway 12 between mile markers 320 and 321. Interstate 39/90 near mile marker 163. Interstate 94 between mile markers 267 and 294, and between mile markers 297 and 300. Wisconsin Highway 26 between mile markers 9 and 37. Interstate 43 between mile markers 28 and 50.
INSTRUCTION: If outdoors, consider seeking shelter inside a building.
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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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