Weather Alert in Massachusetts
Winter Weather Advisory issued February 18 at 12:04PM EST until February 19 at 4:00AM EST by NWS Albany NY
AREAS AFFECTED: Northern Berkshire; Southern Berkshire; Southern Herkimer; Southern Fulton; Montgomery; Schoharie; Western Schenectady; Eastern Schenectady; Southern Saratoga; Western Albany; Eastern Albany; Western Rensselaer; Eastern Rensselaer; Western Greene; Eastern Greene; Western Columbia; Eastern Columbia; Western Ulster; Northern Fulton
DESCRIPTION: * WHAT...Mixed precipitation. Additional snow accumulations up to two inches and ice accumulations around a light glaze. * WHERE...Berkshire County in western Massachusetts and the Mohawk Valley, eastern Catskills, Helderbergs, northern and central Taconics and Capital District in eastern New York. * WHEN...Until 4 AM EST Thursday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact this evening's commute. * ADDITIONAL DETAILS...A mix of snow and rain this afternoon will become all snow this evening and continue into tonight before ending early Thursday morning. Localized pockets of freezing rain will be possible as well, especially along and south of Interstate 90 and in higher elevations, which may produce up to a light glaze. As temperatures fall below freezing tonight, any wet, untreated surfaces may become icy so use caution if traveling tonight.
INSTRUCTION: Slow down and use caution while traveling.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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