Weather Alert in Alaska
Winter Weather Advisory issued February 16 at 6:30PM AKST until February 18 at 3:00PM AKST by NWS Fairbanks AK
AREAS AFFECTED: Lower Koyukuk Valley; Middle Yukon Valley
DESCRIPTION: * WHAT...Snow and blowing snow. Total snow accumulations between 4 and 7 inches possible. Winds could gust as high as 30 mph. * WHERE...Lower Koyukuk Valley, Lower Yukon and Innoko Valleys, Middle Yukon Valley, North Slopes of the Western Alaska Range, and Upper Kuskokwim Valley. * WHEN...From 3 AM Tuesday to 3 PM AKST Wednesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Some blowing snow is possible and visibility may approach one-half mile at times.
INSTRUCTION: Slow down and use caution while traveling.
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North America Water Vapor (Moisture)
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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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