Weather Alert in Alaska
Special Weather Statement issued September 7 at 1:33PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Northwest Arctic Coast; Northern Arctic Coast; Central Beaufort Sea Coast; Eastern Beaufort Sea Coast; Western Arctic Plains; Howard Pass and the Delong Mountains; Central Arctic Plains; Central Brooks Range; Romanzof Mountains
DESCRIPTION: Accumulating wet snow is expected to spread from southeast to northwest on Wednesday with accumulation starting Wednesday night. Several inches of wet snowfall combined with gusty northeast winds is increasingly likely across much of the North Slope. Snow chances diminish Thursday night into Friday. Hunters, recreators, and travelers are encouraged to prepare for wintry conditions Wednesday night through Thursday and monitor the latest forecast for updates.
INSTRUCTION: N/A
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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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