Weather Alert in Oregon
Dense Fog Advisory issued August 13 at 1:30AM PDT until August 13 at 11:00AM PDT by NWS Portland OR
AREAS AFFECTED: Clatsop County Coast; Tillamook County Coast; Central Coast of Oregon; South Washington Coast
DESCRIPTION: * WHAT...Visibility one quarter mile or less in dense fog. Beaches, headlands, and coastal areas will be most impacted. * WHERE...South Washington and North and Central Oregon Coast. * WHEN...Until 11 AM PDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Fog and low stratus will be patchy along the north Oregon and south Washington Coast, but when it does form, it will be dense. Highest concentration of dense fog will be from Lincoln City south towards Florence. Areas from Cannon Beach north will see fog burn off the quickest in the morning.
INSTRUCTION: If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
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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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