Weather Alert in Alaska
Winter Weather Advisory issued February 28 at 5:49AM AKST until February 28 at 6:00PM AKST by NWS Juneau AK
AREAS AFFECTED: City and Borough of Sitka
DESCRIPTION: ...CENTRAL AND SOUTHERN PANHANDLE SNOW SATURDAY WITH POTENTIAL FOR MORE SNOW SUNDAY... Snowfall has increased in intensity and coverage overnight as a low tracks eastward across the Gulf towards the central panhandle. An estimated 2 to 4 inches has fallen overnight, these accumulations are separate from the next system set to affect the area through Saturday. Steady snowfall will continue through Saturday morning with rates increasing through the afternoon. Heaviest snowfall rates are expected to start by mid day along the coast, spreading eastward towards Hyder through Saturday night. As the low center tracks eastward through Saturday afternoon and evening, south to southwest wind will cause temperatures to warm over the southern outer coast with a mix or change to rain. Snow will then end on the NW side of the low, from Sitka to Juneau 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 potential additional heavy snow 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 again. * WHAT...Snow expected. Total snow accumulations of 4 to 7 inches. Winds gusting as high as 35 mph. * WHERE...City and Borough of Sitka. * WHEN...Until 6 PM AKST Saturday. * IMPACTS...Travel could be difficult. * ADDITIONAL DETAILS...Heaviest snowfall rates expected Saturday mid day. Mixing with rain is likely in the afternoon.
INSTRUCTION: Slow down and use caution while traveling. 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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