Weather Alert in Michigan
Special Weather Statement issued August 23 at 7:06PM EDT by NWS Detroit/Pontiac MI
AREAS AFFECTED: Washtenaw
DESCRIPTION: At 706 PM EDT, Doppler radar was tracking strong thunderstorms along a line extending from 7 miles south of Stockbridge to near Grass Lake to near Cement City. Movement was east at 40 mph. HAZARD...Winds in excess of 40 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Strong thunderstorms will be near... Chelsea around 715 PM EDT. Manchester around 720 PM EDT. Dexter around 725 PM EDT. Ann Arbor around 735 PM EDT. Saline and Whitmore Lake around 740 PM EDT. Dixboro around 745 PM EDT. Ypsilanti around 750 PM EDT. Other locations impacted by these storms include Hudson Mills, Pittsfield Township, Whittaker, Lyndon Township, Hudson Mills Metropark, Bridgewater, Delhi Mills, Pleasant Lake, and Barton Hills. People attending Chelsea Community Fair should seek safe shelter immediately!
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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