Weather Alerts for Oregon
1. Freeze Warning for: Foothills of the Northern Blue Mountains of Oregon; Kittitas Valley; Yakima Valley
2. Freeze Warning for: Upper Hood River Valley
3. Freeze Watch for: Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills
4. Freeze Watch for: Upper Hood River Valley
5. Frost Advisory for: Cascade Foothills of Marion and Linn Counties; Lane County Cascade Foothills
6. Frost Advisory for: Jackson County
7. Frost Advisory for: Lower Columbia River; West Hills and Chehalem Mountains; Willapa Hills
8. 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
9. Winter Storm Warning for: East Slopes of the Oregon Cascades
10. Winter Storm Warning for: North Oregon Cascades; Cascades of Marion and Linn Counties; Cascades of Lane County; South Washington Cascades
11. Winter Weather Advisory for: Northern Blue Mountains of Oregon; Northwest Blue Mountains
12. 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 Stratus Clouds?
Home - Education - Cloud Types - Stratus Clouds
Next Topic: Wall Clouds
Stratus clouds are similar to altostratus clouds, but form at a
lower altitude and are identified by their fog-like appearance, lacking the
distinguishing features of most clouds.
Stratus clouds are wider than most clouds, and their base has a smooth, uniform
look which is lighter in color than a nimbostratus cloud.
The presence of a stratus cloud indicates the possibility of minor precipitation,
such as drizzle, but heavier precipitation does not typically arrive in the form
of a stratus cloud.
Next Topic: Wall Clouds
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
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