Weather Alert in Alaska
Flood Watch issued August 28 at 3:01PM AKDT until August 29 at 12:00PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: South Slopes of the Western Brooks Range; Noatak Valley; Upper Kobuk Valleys; Lower Koyukuk Valley; Upper Koyukuk Valley
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Including the following areas, Lower Koyukuk Valley, Noatak Valley, South Slopes of the Western Brooks Range, Upper Kobuk Valleys and Upper Koyukuk Valley. This includes the cities of Walker Lake, Noatak, Red Dog Mine, Ambler, Shungnak, Kobuk, Huslia, Hughes, Allakaket, Bettles, Evansville, And Alatna. * WHEN...Through Friday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Area creeks and streams are running high and could flood with more heavy rain. Flooding may occur in poor drainage areas. * ADDITIONAL DETAILS... - Heavy rainfall that caused rapid rises in headwater streams will continue to cause high water levels on main stem rivers through the weekend. The Koyukuk River has likely crested at Allakaket this afternoon with minor flooding. It is expected to crest in minor flood stage downstream at hughes tomorrow evening. The Kobuk River is cresting at Kobuk today and may stay high or have another rise through the end of the week due to continued rainfall. - Http://www.weather.gov/aprfc
INSTRUCTION: Persons living along streams should stay alert and be prepared to take action if a warning or advisory is issued, or flooding is observed. You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop. 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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