Weather Alert in Alaska
Winter Weather Advisory issued August 26 at 3:38AM AKDT until August 28 at 7:00AM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Central Beaufort Sea Coast
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations up to two inches. * WHERE...Central Arctic Plains, Central Beaufort Sea Coast, and Central Brooks Range. * WHEN...From 10 PM this evening to 7 AM AKDT Thursday. * IMPACTS...Plan on slippery road conditions. Any accumulating snow and freezing rain could create difficult travel conditions. * ADDITIONAL DETAILS...There is very high uncertainty in exact accumulations. Freezing rain is possible everywhere, especially in the Brooks Range and along the Dalton Highway south of Prudhoe Bay. Temperatures will hover around 32 degrees, especially Tuesday night and Wednesday night which will make things difficult to accumulate unless precipitation rates are heavy enough to overcome warm ground temperatures. The greatest risk for accumulating snow will be north of the Brooks Range and towards the coast, while the greatest risk for freezing rain accumulations resides in the Brooks Range. The Dalton Highway in between has equal chances for both.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
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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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