Weather Alert in Alaska
Flood Advisory issued September 2 at 5:19AM AKDT until September 4 at 9:15AM AKDT by NWS Anchorage AK
AREAS AFFECTED: Western Susitna Valley; Central Susitna Valley; Northern Susitna Valley
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall continues. * WHERE...Northern Susitna Valley in the Petersville area * WHEN...Until 915 AM AKDT Thursday. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams. Some low-water crossings may become impassable. River or stream flows are elevated. * ADDITIONAL DETAILS... - 1 to 2 inches of rainfall has fallen overnight and may exacerbate ongoing flooding issues along the headwaters of Peters Creek and Cache Creek. After a lull in rain on Tuesday, another round of rain set to occur on Wednesday is expected to bring another inch of rainfall. - Area creeks and streams are already running higher than normal after the rainfall from last week. While waters have been receding, additional rainfall may result in rises again this week. - Streams that may be affected include Peters Creek, Cache Creek, Moose Creek, Kroto Creek, and other nearby streams and their tributaries. Larger rivers such as that Yentna and Susitna are NOT expected to rise into flood stage again. - 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. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks.
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Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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