Weather Alert in Alaska
Flood Advisory issued August 28 at 10:07PM AKDT until August 29 at 4:00AM AKDT by NWS Anchorage AK
AREAS AFFECTED: Anchorage
DESCRIPTION: * WHAT...Urban and small stream flooding caused by excessive rainfall is expected. * WHERE...Anchorage bowl. * WHEN...Until 400 AM AKDT. * IMPACTS...Ponding of water over roadways is leading to minor flooding in low-lying and poor drainage areas. Chester Creek is approaching bankfull and water levels along other small streams in the area are also rising. * ADDITIONAL DETAILS... - At 1002 PM AKDT, reports of heavy rain is occurring the advisory area. This is causing urban and small stream flooding in addition to overflowing of poor drainage areas. - http://www.weather.gov/safety/flood
INSTRUCTION: 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 is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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