Weather Alerts for Oregon
1. Freeze Warning for: Foothills of the Northern Blue Mountains of Oregon; Kittitas Valley; Yakima Valley
2. Freeze Watch for: Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills
3. Freeze Watch for: Upper Hood River Valley
4. Frost Advisory for: Jackson County
5. Frost Advisory for: North Oregon Coast Range Lowlands; Central Oregon Coast Range Lowlands; North Oregon Coast Range; Central Oregon Coast Range; Tualatin Valley; West Central Willamette Valley; East Central Willamette Valley; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands; Clackamas County Cascade Foothills; Cowlitz County Lowlands; North Clark County Lowlands; South Washington Cascade Foothills
6. Winter Storm Warning for: East Slopes of the Oregon Cascades
7. Winter Storm Warning for: North Oregon Cascades; Cascades of Marion and Linn Counties; Cascades of Lane County; South Washington Cascades
8. Winter Weather Advisory for: Northern Blue Mountains of Oregon; Northwest Blue Mountains
9. Winter Weather Advisory for: South Central Oregon Cascades
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North America Water Vapor (Moisture)
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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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