Weather Alert in Alaska
Flood Warning issued August 31 at 9:26PM AKDT until September 2 at 4:00PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Lower Koyukuk Valley
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Koyukuk River near Hughes. * WHEN...Until 400 PM AKDT Tuesday. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. * ADDITIONAL DETAILS... - As of 923 PM AKDT, the Koyukuk River at Hughes was observed to be in minor flood stage by the KRHA2 river gauge. - The gauge at Hughes reported a stage of 64.49 feet, minor flood stage is 64.0 feet and a crest of 64.72 feet is expected by 4 AM AKDT Monday. The river is forecasted to remain in minor flood stage until Monday morning when it should drop to action stage. There will be additional rainfall of 0.5 to 1.5 inches through the holiday weekend, so while the river will be dropping on Monday, there may be another crest on Tuesday or Wednesday this upcoming week. - http://www.weather.gov/aprfc
INSTRUCTION: Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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