Weather Alert in Washington
Red Flag Warning issued September 3 at 1:52PM PDT until September 4 at 9:00PM PDT by NWS Spokane WA
AREAS AFFECTED: Okanogan Highlands & Kettle Mountains; Selkirk Mountains of Northeast Washington; Foothills of Northeast Washington; Colville Reservation
DESCRIPTION: * Affected Area: Okanogan Highlands and Kettle Mountains (Zone 699), Selkirk Mountains of Northeast Washington (Zone 700), Foothills of Northeast Washington (Zone 701) and Colville Reservation (Zone 702). * Winds: Terrain driven winds 2 to 5 mph becoming northwest to north overnight 3 to 7 mph. * Relative Humidities: Minimum 10 to 18 percent. Humidity recoveries on midslopes within thermal belts of 25 to 35 percent. * Temperatures: 97 to 103 valleys. 85 to 90 mountains. * Impacts: Hot, dry, unstable conditions will lead to the potential for rapid fire growth on new or existing fires.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.
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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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