Weather Alert in Alaska
Flood Warning issued August 28 at 6:08PM AKDT until August 31 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 continues. * WHERE...the Yentna River and tributaries at and above Lake Creek. * WHEN...Until 1000 AM AKDT Sunday. * IMPACTS...At 20.5 feet, water begins to inundate several low-lying cabins. At 22.0 feet, more extensive flooding of cabins, resorts, and private property. * ADDITIONAL DETAILS... - At 545 PM AKDT, Between 1 and 2 inches of rain have fallen. The river gage at Lake Creek and other gages across the Susitna Valley show considerable rises across area rivers. Additional rainfall amounts of around an inch are expected. For Yentna River at Lake Creek: At 5:00pm the stage was 20.9 feet and rising. Flood Stage is 20.5 feet. Forecast: A crest around 23 feet is expected around Friday night into early Saturday morning with an estimated crest time at 4 am Saturday. The river will then begin to fall and is expected to go below flood stage Sunday. This may equal or exceed the August 2024 crest of 22.4 feet. - 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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
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Weather Topic: What is Precipitation?
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Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
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