Weather Alert in Maine
Winter Weather Advisory issued March 6 at 12:34PM EST until March 7 at 1:00PM EST by NWS Caribou ME
AREAS AFFECTED: Northwest Aroostook; Northeast Aroostook; Northern Somerset; Northern Piscataquis; Northern Penobscot; Southeast Aroostook; Central Piscataquis; Central Penobscot; Southern Penobscot; Interior Hancock; Central Washington; Southern Piscataquis; Northern Washington
DESCRIPTION: * WHAT...Mixed precipitation expected. Ice accumulations up to one tenth of an inch, with little if any sleet accumulation expected. * WHERE...Portions of Central Highlands, Far Eastern, Far Northern, Interior DownEast, North Woods, and Penobscot Valley Maine * WHEN...From 6 AM to 1 PM EST Saturday. * IMPACTS...Plan on slippery road conditions.
INSTRUCTION: A Winter Weather Advisory means that periods of snow, sleet or freezing rain will cause travel difficulties. Expect slippery roads and limited visibilities, and use caution while driving. The latest road conditions for Maine can be obtained by going to newengland511.org.
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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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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