Weather Alert in Maine
Cold Weather Advisory issued February 6 at 12:48PM EST until February 8 at 10:00AM EST by NWS Gray ME
AREAS AFFECTED: Northern Oxford; Northern Franklin; Central Somerset; Northern Coos; Southern Coos; Northern Grafton
DESCRIPTION: * WHAT...Very cold wind chills as low as 28 below expected. * WHERE...In Maine, Central Somerset, Northern Franklin, and Northern Oxford Counties. In New Hampshire, Northern Coos, Northern Grafton, and Southern Coos Counties. * WHEN...From 6 PM Saturday to 10 AM EST Sunday. * IMPACTS...Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. * ADDITIONAL DETAILS...Wind chill values will be even colder, approaching 30 to 40 below, at higher elevations where wind will be strongest. Wind chills will again fall well below zero Sunday night.
INSTRUCTION: Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.
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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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