Weather Alert in Alaska
Special Weather Statement issued August 23 at 11:17PM AKDT by NWS Anchorage AK
AREAS AFFECTED: Kuskokwim Delta Coast and Nunivak Island
DESCRIPTION: A deepening low pressure system will move northeastward through the Bering Sea to between the Pribilof Islands and Saint Matthew Island through Monday morning and into the vicinity of Norton Sound by Monday afternoon/evening. Strong gusty southerly winds of 40 to 50 mph are likely along the northern Kuskokwim Delta Coast including the communities of Kongiganak, Kwigillingok, and Kipnuk. Peak winds will occur between mid-morning Monday and early Monday evening before slowly diminishing Monday night into Tuesday morning. High surf will accompany the strong winds with wave heights between 4 to 8 feet in the coastal waters along the Kuskokwim Delta Coast. Higher wave heights of 9 to 12 feet are likely at the southern end of Etolin Strait. Peak wave heights occur mid- Monday morning through Monday night before slowly subsiding through Tuesday morning. In addition, periods of heavy rain are also likely Sunday night through Tuesday with 2 to 3 inches of precipitation possible through the duration.
INSTRUCTION: N/A
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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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