Weather Alert in Oregon
Fire Weather Watch issued July 7 at 10:47PM PDT until July 9 at 10:00PM PDT by NWS Pendleton OR
AREAS AFFECTED: Lower Columbia Basin of Oregon; Lower Columbia Basin
DESCRIPTION: ...DRY THUNDERSTORMS EXPECTED TUESDAY OVER CENTRAL AND EASTERN OREGON, FOLLOWED BY DRY AND WINDY CONDITIONS ACROSS THE COLUMBIA BASIN WEDNESDAY... .The ridge of high pressure currently in place over the Pacific Northwest will break down Tuesday night through Wednesday as a pair of upper-level low-pressure systems pass over the region. This will lead to thunderstorm development across central and eastern Oregon Tuesday afternoon and evening. Widespread breezy to windy conditions will persist Tuesday evening through Wednesday, strongest through the Cascade gaps and Columbia Basin. * AFFECTED AREA...Fire Weather Zones 691 Lower Columbia Basin of Oregon and 691 Lower Columbia Basin of Washington. * TIMING...From Wednesday morning through Wednesday evening. * WINDS...West 20 to 30 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.
INSTRUCTION: A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
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Weather Topic: What are Cirrocumulus Clouds?
Home - Education - Cloud Types - Cirrocumulus Clouds
Next Topic: Cirrostratus Clouds
Cirrocumulus clouds form at high altitudes (usually around 5 km)
and have distinguishing characteristics displayed in a fine layer of
small cloud patches. These small cloud patches are sometimes referred to as
"cloudlets" in relation to the whole cloud formation.
Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the
water droplets in the cloud freeze into ice crystals and the cloud becomes a
cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud
formations generally pass rapidly.
Next Topic: Cirrostratus Clouds
Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
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