Weather Alert in Alaska
Flood Advisory issued September 4 at 12:36PM AKDT until September 6 at 12:00PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Upper Koyukuk Valley
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Koyukuk River near Allakaket. * WHEN...Until noon AKDT Saturday. * IMPACTS...Minor flooding in low-lying and poorly drained areas. * ADDITIONAL DETAILS... - For the duration of this event there have been reports of some low lying roads being inundated. - The streamgage on the Koyukuk River below the John River shows water levels have been fluctuating less that a foot over the last 5 days and are not showing a rising or dropping trend. Though rain is still falling in areas on the south side of the Brooks Range, upstream locations (Slate Creek and the Middle and South Forks of the Koyukuk River) are not showing significant increases in response. Water levels are expected to remain steady at Allakaket for the next few days. - Http://www.weather.gov/aprfc
INSTRUCTION: N/A
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Weather Topic: What are Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
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Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
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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.
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