Weather Alert in Washington
Flood Watch issued August 27 at 1:49PM PDT until August 28 at 9:00PM PDT by NWS Spokane WA
AREAS AFFECTED: Chelan, WA; Okanogan, WA
DESCRIPTION: Thunderstorms with heavy rain are expected to develop late Thursday morning through Thursday evening in the Cascades. Heavy rainfall in steep terrain and burn scars may lead to flash flooding or debris flows on Thursday. * WHAT...Flash flooding and debris flows caused by excessive rainfall from thunderstorms is possible. * WHERE...A portion of North Central Washington, including the following counties, Chelan and Okanogan. This will include, but not limited to burn scar locations: Pioneer and 25 Mile burn scars in Chelan County, and Cedar Creek, Cub Creek, Muckamuck, Walker Creek, and Eagle Bluff burn scars in Okanogan County. * WHEN...From Thursday morning through Thursday evening. * IMPACTS...Heavy rainfall may result in flash flooding or debris flows in steep terrain, particularly near burn scar locations. Rain rates of up to an inch per hour will be possible with thunderstorms. * ADDITIONAL DETAILS... - Those within canyons or near burn scars should monitor for updated information from local authorities. - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
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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
Weather Topic: What are Cirrostratus Clouds?
Home - Education - Cloud Types - Cirrostratus Clouds
Next Topic: Cirrus Clouds
Cirrostratus clouds are high, thin clouds that form above
20,000 feet and are made mostly of ice crystals. They sometimes look like giant
feathers, horse tails, or curls of hair in the sky.
These clouds are pushed by the jet stream and can move at high speeds reaching
100 mph.
What do they indicate?
They indicate that a precipitation is likely within 24 hours.
Next Topic: Cirrus Clouds
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