Weather Alert in Washington

Recent Locations: Saint Paul, OR Deerfield, VA Seattle-Tacoma International Airport, WA

Current Alerts for Seattle-Tacoma International Airport, WA: Heat Advisory

High Wind Warning issued July 14 at 5:05AM PDT until July 14 at 11:00PM PDT by NWS Spokane WA

AREAS AFFECTED: Okanogan Valley

DESCRIPTION: * WHAT...North winds 30 to 40 mph with gusts up to 60 mph. * WHERE...Brewster, Tonasket, Okanogan, Disautel Pass, Oroville, Nespelem, Omak, and Bridgeport. * WHEN...From 1 PM this afternoon to 11 PM PDT this evening. * IMPACTS...Widespread power outages are possible on Monday. Damaging winds could blow down trees and power lines. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...High winds on Monday will be from the north funneling down the Okanogan Valley. The potential for damaging winds will come with the initial surge late in the afternoon. Winds may also pick up blowing dust reducing visibility for a brief period.

INSTRUCTION: Remain in the lower levels of your home during the windstorm, and avoid windows. Watch for falling debris and tree limbs. Use caution if you must drive.

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Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

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