Weather Alert in Alaska
Flood Advisory issued August 28 at 3:46PM AKDT until August 29 at 12:00PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Upper Koyukuk Valley
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Koyukuk River at Allakaket. * WHEN...Until noon AKDT Friday. * IMPACTS...Minor flooding in low-lying and poorly drained areas. Water over roadways may cut off access to the downtown area and possibly to the runway. * ADDITIONAL DETAILS... - As of Thursday morning the public has reported minor flooding in Allakaket with river levels cresting today (Thursday). Between 3 and 5 inches of rain fell early in the week and the current high water is a result of that heavy rain. Additional moderate rainfall has continued which will keep river levels high for several more days. - http://www.weather.gov/aprfc
INSTRUCTION: Monitory river levels and be prepared to take action to preserve life and property.
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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
Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
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