Weather Alert in Oregon
Red Flag Warning issued August 12 at 10:33PM PDT until August 13 at 9:00PM PDT by NWS Pendleton OR
AREAS AFFECTED: Lower Columbia Basin of Oregon; Canyon Grassland of Wallowa County; Eastern Columbia River Gorge of Oregon; East Slopes of Mount Hood National Forest; Kittitas Valley; Lower Columbia Basin; Blue Mountains of Washington; Southeast Washington Grande Ronde Valley; Yakama Alpine District
DESCRIPTION: ...BREEZY WINDS WITH LOW RELATIVE HUMIDITY THROUGH WEDNESDAY... .An approaching weather system will result in breezy winds accompanied by low relative humidity across south-central to southeast Washington and central to northeast Oregon. * AFFECTED AREA...Fire Weather Zones 690 Kittitas Valley, 691 Lower Columbia Basin of Oregon, 691 Lower Columbia Basin of Washington, 692 Blue Mountains of Washington, 693 Canyon Grasslands of Wallowa County, 693 Southeast Washington Grande Ronde Valley, 694 Yakama Alpine District, 701 Eastern Columbia River Gorge of Oregon and 702 East Slopes of the Mt. Hood National Forest. * TIMING...From noon to 9 PM PDT Wednesday. * WINDS...West 15 to 25 mph with gusts of 25 to 40 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended.
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 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
Weather Topic: What is Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Contrails
Condensation is the process which creates clouds, and therefore
it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid,
and it happens because water molecules release heat into the atmosphere and
become organized into a more closely packed structure, what we might see as
water droplets.
Water is always present in the air around us as a vapor, but it's too small for
us to see. When water undergoes the process of condensation it becomes organized
into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Contrails
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