Weather Alert in Alaska
Flood Watch issued July 19 at 10:56PM AKDT until July 22 at 4:00PM AKDT by NWS Juneau AK
AREAS AFFECTED: Haines Borough and Klukwan
DESCRIPTION: Warm temperatures are expected in the Chilkat Valley Sunday through Tuesday that will increase melt water runoff from area glaciers in to the Chilkat River system. * WHAT...Flooding caused by snowmelt continues to be possible. * WHERE...The following areas, Chilkat, Klehini, and Tsirku Rivers Near Haines * WHEN...From late Sunday night through Tuesday afternoon. * IMPACTS...Rivers may rise out of their banks possibly causing minor flooding of low lying areas near the rivers, especially near Klukwan. * ADDITIONAL DETAILS... - Warm temperatures are expected to occur in the northern panhandle starting Sunday and last into early next week. This is expected to increase runoff from the melting of glacier ice and any remaining snow in higher elevations possibly raising area rivers to minor flood stage as early as late Sunday night. Area rivers could then remain above minor flood stage into early next week.
INSTRUCTION: Stay tuned to further developments by listening to your local radio, television, or NOAA Weather Radio for further information. If you live near or along Chilkat River stay alert and be prepared to take action.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
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