Weather Alert in Alaska
Winter Weather Advisory issued February 28 at 5:59PM AKST until March 2 at 9:00AM AKST by NWS Juneau AK
AREAS AFFECTED: Western Kupreanof and Kuiu Island
DESCRIPTION: ...CENTRAL AND SOUTHERN PANHANDLE SNOW SATURDAY WITH POTENTIAL FOR MORE SNOW SUNDAY... Steady snowfall continues across a majority of the panhandle and will continue as the low moves into the eastern gulf through Saturday night before beginning to diminish. South to southwest winds are causing temperatures to warm over the southern outer coast with precipitation becoming a mix or changing to all rain. Through Saturday night, snow will end on the NW side of the low, from Sitka to Juneau and northward. Moisture will decrease overnight Saturday across the south, but then redevelop on Sunday as another system moves in. The rain/snow line will likely hover in vicinity of Sumner Strait Sunday into Monday with additional heavy snow expected for the Petersburg and Wrangell areas and lighter snow northward. A separate low pressure system looks to affect the region on Tuesday with potential for snow to push northward once again. * WHAT...For the first Winter Weather Advisory, snow. Additional snow accumulations of up to two inches. For the second Winter Weather Advisory, snow expected. Total snow accumulations of 4 to 6 inches. * WHERE...Western Kupreanof Island and Kuiu Island. * WHEN...For the first Winter Weather Advisory, until 9 PM AKST this evening. For the second Winter Weather Advisory, from noon Sunday to 9 AM AKST Monday. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...A break is expected overnight Saturday into Sunday morning before another band of snow develops and pushes northward Sunday afternoon.
INSTRUCTION: Slow down and use caution while traveling. People are urged to prepare their property before the onset of winter weather.
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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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