Weather Alert in Alaska
Flood Advisory issued September 10 at 4:06PM AKDT until September 13 at 10:00AM AKDT by NWS Anchorage AK
AREAS AFFECTED: Western Susitna Valley; Southern Susitna Valley; Central Susitna Valley
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...the Yentna River near Lake Creek. * WHEN...Until 1000 AM AKDT Saturday. * IMPACTS...At 20.5 feet, water begins to inundate several low-lying cabins. * ADDITIONAL DETAILS... - At 252 PM AKDT, the YLKA2 river gauge indicated rises in water levels from heavy rain across the advisory area. Water levels at the Yentna River near Lake Creek are near bankfull. Minor flooding in low lying areas is expected to begin late Thursday evening. - At 1:00 PM AKDT, Between 0.5 and 1 inch of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible. The river level is at Action Stage and is expected to reach Minor Flood stage at 10 PM AKDT Thursday. Forecast: A crest around 20.8 feet is expected late Friday morning with an estimated crest time at 10 AM AKDT Friday. The river will then begin to fall and is expected to go below flood stage by Saturday morning. - Http://www.weather.gov/safety/flood
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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