Weather Alert in Maine
Winter Storm Warning issued March 12 at 1:57AM EDT until March 12 at 10:00AM EDT by NWS Caribou ME
AREAS AFFECTED: Northwest Aroostook; Northeast Aroostook
DESCRIPTION: * WHAT...Heavy mixed precipitation. Ice accumulations between one tenth and two tenths of an inch and additional sleet accumulations around a tenth of an inch. * WHERE...Northeast Aroostook and Northwest Aroostook Counties. * WHEN...Until 10 AM EDT this morning. Temperatures rise above freezing after 10 AM and precipitation ends. * IMPACTS...Plan on slippery road conditions. The hazardous conditions will impact the Thursday morning commute.
INSTRUCTION: A Winter Storm Warning means significant amounts of snow, sleet, and ice will make travel extremely dangerous. The latest road conditions for Maine can be obtained by going to newengland511.org. Persons should delay all travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order.
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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
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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