Weather Alerts for Oregon

Recent Locations: Santa Rosa, CA Saint Helena, CA Rainier, OR

Current Alerts for Rainier, OR: Extreme Heat Warning

1. Air Quality Alert for: Crook, OR; Deschutes, OR; Jefferson, OR

2. Air Quality Alert for: Lane County Cascade Foothills; Cascades of Lane County

3. 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

4. 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

5. 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

6. Extreme Heat Warning for: Eastern Curry County and Josephine County; Jackson County

7. 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

8. Heat Advisory for: Central Douglas County; Eastern Douglas County Foothills

9. Heat Advisory for: Grande Ronde Valley; John Day Basin; Central Oregon; Northwest Blue Mountains

10. 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

11. Heat Advisory for: North Oregon Coast Range; Central Oregon Coast Range; Willapa Hills

12. Heat Advisory for: Wallowa County; East Slopes of the Oregon Cascades

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds