Weather Alert in Oregon
Air Quality Alert issued August 22 at 4:03PM PDT by NWS Portland OR
AREAS AFFECTED: Lane County Cascade Foothills; Cascades of Lane County
DESCRIPTION: The Oregon Department of Environmental Quality and the Lane Regional Air Protection Agency have issued an Air Quality Advisory, which is IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY. An Air Quality Advisory for Smoke has been issued. Wildfires burning in the region combined with forecasted conditions will cause air quality to reach unhealthy levels due to smoke and ozone at times through Monday. Pollutants in smoke can cause burning eyes, runny nose, aggravate heart and lung diseases, and aggravate other serious health problems. Limit outdoor activities and keep children indoors if it is smoky. Please follow medical advice if you have a heart or lung condition. More information about air quality can be found at: www.orcaa.org www.swcleanair.gov www.oregon.gov/DEQ www.lrapa.org
INSTRUCTION: N/A
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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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