Weather Alert in Oregon
Special Weather Statement issued August 22 at 1:26AM PDT by NWS Portland OR
AREAS AFFECTED: 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
DESCRIPTION: Breezy easterly winds are expected through Friday night for the Columbia River Gorge and adjacent Cascade ridgetops and late Friday morning through Friday evening for the eastern Portland/Vancouver metro. Winds will be strongest on exposed ridgetops where wind gusts will most likely peak between 25-35 mph. Elsewhere, expect wind gusts between 15-20 mph, except up to 30 mph in the western Columbia River Gorge. The breezy east winds will occur simultaneously with low relative humidity values of 20-30% or less, resulting in near critical fire weather conditions. Due to recent rains in the area, larger fuels (such as trees and shrubs) are not dry enough to cause rapid fire spread, but the hot weather will allow fine fuels (such as grasses) to dry out quickly, allowing for potential rapid spread. Use extra caution with potential ignition sources, especially in grassy areas. Outdoor burning is not recommended.
INSTRUCTION: N/A
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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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