Weather Alert in Alaska
Flood Watch issued September 2 at 7:41AM AKDT until September 7 at 10:00AM AKDT by NWS Anchorage AK
AREAS AFFECTED: NW Kenai Peninsula; Skilak Lake
DESCRIPTION: * WHAT...Flooding caused by the Skilak glacier-dammed lake release is possible. * WHERE...Skilak Lake and the Middle Kenai River near Skilak Lake and the Kenai River Downstream of Skilak Lake. * WHEN...Through Sunday morning. * IMPACTS...Kenai River level forecasts: Currently expecting the Kenai River to rise steadily at Skilak Lake outlet another 2 feet, cresting at moderate flood stage Friday or Saturday. At the Kenai Keys, expecting the Kenai River to rise another 2 to 2.5 feet, cresting just below moderate flood stage of 12 feet Friday or Saturday. Down river at Soldotna, expecting the Kenai River to rise steadily through week, cresting Saturday above bankfull levels near 12 feet. IMPACTS: Expect steady river level increases next 4 days on lower Kenai River. Flooding of low lying areas in the Kenai Keys area, boat dock issues and extended period of high water and bankfull conditions is likely. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Skilak Glacier Dam Lake is likely releasing. This combined with recent significant rain in the upper Kenai River basin will cause Kenai river levels to rise steadily from the outlet of Skilak Lake to the mouth through the end of this week. Some uncertainty exists due to recent rain as to when the Skilak Glacier Dam lake began releasing which could impact the crest timing and height. Planned aerial reconnaissance of Skilak Glacier Dam Lake will confirm whether a release has taken place and the extent of any release. - Http://www.weather.gov/safety/flood
INSTRUCTION: 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 Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
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A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
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Weather Topic: What is Snow?
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Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
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