Weather Alert in Alaska
Special Weather Statement issued August 28 at 10:58PM AKDT by NWS Anchorage AK
AREAS AFFECTED: Northern Copper Valley; Western Copper Valley; Central Copper Valley; Ernestine; Southern Copper Valley
DESCRIPTION: The strongest wind gusts will range between 35 and 50 mph, with the strongest gusts focused along the Copper River Valley north of Kenny Lake and along the Richardson and Glenn Highways north and west of Glennallen. Persistent gusty winds tonight will continue into Friday morning as the front pushes to the east. Winds are then expected to diminish in intensity by Friday evening. People are urged to secure loose objects that could be blown around by the strong winds and use caution while traveling. Winds could coincide with periods of moderate rain, potentially making driving difficult at times. Trees are still fully leafed and will be unusually vulnerable to damage from the strong winds. Localized power outages will be possible due the potential for strong winds to bring down tree branches onto power lines.
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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