Weather Alert in Alaska
High Surf Advisory issued August 11 at 3:48PM 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...Until 10 PM AKDT Tuesday. * IMPACTS...Localized coastal erosion may occur. * ADDITIONAL DETAILS...There will be two peaks of high water, one with high tide this afternoon and another with high tide Tuesday afternoon. The strongest push of southerly winds along the coast, with gusts of 35 to 50 mph, will be this afternoon into Tuesday morning.
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 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.
Next Topic: Nimbostratus Clouds
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
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