Weather Alert in New York
Winter Weather Advisory issued February 19 at 12:46PM EST until February 21 at 10:00AM EST by NWS Burlington VT
AREAS AFFECTED: Northern St. Lawrence; Northern Franklin; Southeastern St. Lawrence; Southern Franklin; Southwestern St. Lawrence; Grand Isle; Western Franklin; Orleans; Essex; Western Chittenden; Lamoille; Caledonia; Washington; Western Addison; Orange; Western Rutland; Eastern Franklin; Eastern Chittenden
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 4 and 7 inches. * WHERE...Portions of northern New York and Vermont. * WHEN...From 10 AM Friday to 10 AM EST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions will likely impact the Friday evening commute. * ADDITIONAL DETAILS...Snow will expand from southwest to northeast during the day. Precipitation may begin as mixed rain and snow in localized areas, especially in the southern St. Lawrence and Champlain Valleys. Snowfall rates will likely exceed 1 inch per hour at times soon after precipitation begins. Snow will trend lighter and become increasingly dry Friday night into Saturday.
INSTRUCTION: Slow down and use caution while traveling. For the latest on road conditions in Vermont, visit https://newengland511.org and for New York, visit https://511ny.org.
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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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