Weather Alerts for Oregon
1. Air Quality Alert for: Crook, OR; Deschutes, OR; Jefferson, OR
2. Air Quality Alert for: Tualatin Valley; West Hills and Chehalem Mountains; Inner Portland Metro; East Portland Metro; West Central Willamette Valley; East Central Willamette Valley; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands
3. Extreme Heat Warning for: Eastern Columbia River Gorge of Oregon; Lower Columbia Basin of Oregon; Foothills of the Northern Blue Mountains of Oregon; Foothills of the Southern Blue Mountains of Oregon; North Central Oregon; Eastern Columbia River Gorge of Washington; Kittitas Valley; Yakima Valley; Lower Columbia Basin of Washington; Foothills of the Blue Mountains of Washington; Simcoe Highlands; Lower Slopes of the Eastern Washington Cascades Crest
4. Extreme Heat Warning for: Eastern Curry County and Josephine County; Jackson County
5. Extreme Heat Warning for: Lower Columbia River; Tualatin Valley; West Hills and Chehalem Mountains; Inner Portland Metro; East Portland Metro; Outer Southeast Portland Metro; West Central Willamette Valley; East Central Willamette Valley; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands; West Columbia River Gorge of Oregon above 500 ft; West Columbia River Gorge I-84 Corridor; Upper Hood River Valley; Central Columbia River Gorge I-84 Corridor; Clackamas County Cascade Foothills; Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills; Cowlitz County Lowlands; North Clark County Lowlands; Inner Vancouver Metro; East Clark County Lowlands; South Washington Cascade Foothills; West Columbia River Gorge - SR 14; Central Columbia River Gorge - SR 14
6. Heat Advisory for: Central Douglas County; Eastern Douglas County Foothills
7. Heat Advisory for: Grande Ronde Valley; John Day Basin; Central Oregon; Northwest Blue Mountains
8. Heat Advisory for: North Oregon Coast Range Lowlands; Central Oregon Coast Range Lowlands; North Oregon Cascades; Cascades of Marion and Linn Counties; Cascades of Lane County; Willapa and Wahkiakum Lowlands; South Washington Cascades
9. Heat Advisory for: North Oregon Coast Range; Central Oregon Coast Range; Willapa Hills
10. Heat Advisory for: Wallowa County; East Slopes of the Oregon Cascades
11. Red Flag Warning for: Warm Springs Reservation
12. Special Weather Statement for: East Portland Metro; West Columbia River Gorge of Oregon above 500 ft; West Columbia River Gorge I-84 Corridor; Central Columbia River Gorge I-84 Corridor; East Clark County Lowlands; West Columbia River Gorge - SR 14; Central Columbia River Gorge - SR 14; South Washington Cascades
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Weather Topic: What are Altocumulus Clouds?
Home - Education - Cloud Types - Altocumulus Clouds
Next Topic: Altostratus Clouds
Similar to cirrocumulus clouds, altocumulus clouds are
characterized by cloud patches. They are distinguished by larger cloudlets
than cirrocumulus clouds but are still smaller than stratocumulus clouds.
Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km)
and may resemble, at times, the shape of a flying saucer.
These uncommon formations, called altocumulus lenticularis, are created by uplift
in the atmosphere and are most often seen in close proximity to mountains.
Next Topic: Altostratus Clouds
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
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