Weather Alert in Alaska
High Surf Advisory issued August 10 at 5:16AM AKDT until August 12 at 10:00PM AKDT by NWS Anchorage AK
AREAS AFFECTED: Kuskokwim Delta Coast and Nunivak Island
DESCRIPTION: * WHAT...Water levels 1 to 2 feet above the normal highest tide line. Wave heights between 4 to 8 feet along the coast. * WHERE...Along the Kuskokwim Delta Coast, including the communities of Kwigillingok, Kongiganak, and Kipnuk. * WHEN...From 10 AM AKDT Monday to 10 PM AKDT Tuesday. * IMPACTS...Localized coastal erosion may occur. * ADDITIONAL DETAILS...There will be 2 peaks of high water occurring around high tide. The first occurs Monday afternoon and the second on Tuesday afternoon. The strongest push of southerly winds into the coast, with gusts between 40 to 50 mph, will be Monday afternoon into Tuesday morning. However, southerly fetch and winds will linger through Tuesday evening causing wave heights to be slow to subside along the coast.
INSTRUCTION: A high surf advisory means that high surf will affect beaches in the advisory area, producing rip currents and localized beach erosion.
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Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
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.
Next Topic: Rain
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
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.
Next Topic: Sleet
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