Weather Alert in Alaska
Winter Storm Warning issued February 28 at 10:51PM AKST until March 2 at 9:00AM AKST by NWS Juneau AK
AREAS AFFECTED: Petersburg Borough
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...Heavy snow expected. Total snow accumulations of 10 to 13 inches. * WHERE...Petersburg Borough. * WHEN...From 9 AM Sunday to 9 AM AKST Monday. * IMPACTS...Travel will be very difficult and is discouraged unless it is an emergency. * ADDITIONAL DETAILS...Another surge of moisture will bring heavier snowfall rates by Sunday afternoon and last into Monday morning.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water with you in case of an emergency. People are urged to prepare their property before the onset of winter weather. For the latest road conditions, where available, call 5 1 1 or visit 511.alaska.gov.
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Weather Topic: What is Evaporation?
Home - Education - Precipitation - Evaporation
Next Topic: Fog
Evaporation is the process which returns water from the earth
back to the atmosphere, and is another crucial process in the water cycle.
Evaporation is the transformation of liquid into gas, and it happens because
molecules are excited by the application of energy and turn into vapor.
In order for water to evaporate it has to be on the surface of a body of water.
Next Topic: Fog
Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
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