Weather Alert in Oregon
Special Weather Statement issued February 5 at 12:28PM PST by NWS Pendleton OR
AREAS AFFECTED: Northern Blue Mountains of Oregon; Foothills of the Northern Blue Mountains of Oregon; Foothills of the Southern Blue Mountains of Oregon; North Central Oregon; Central Oregon; Lower Columbia Basin of Washington; Foothills of the Blue Mountains of Washington
DESCRIPTION: Areas of dense fog reducing visibility as low as one quarter mile will persist across many areas especially above about 2000 ft through the duration of the afternoon and into the evening. By the evening and overnight, many of these areas of dense fog will expand to lower elevations, becoming more widespread, especially for areas along the foothills of the Blue Mountains. Motorists should be prepared for dense fog expanding overnight, potentially creating a travel hazard well into the late morning on Friday.
INSTRUCTION: N/A
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Weather Topic: What is Fog?
Home - Education - Cloud Types - Fog
Next Topic: Fractus Clouds
Fog is technically a type of stratus cloud, which lies along the
ground and obscures visibility.
It is usually created when humidity in the air condenses into tiny water droplets.
Because of this, some places are more prone to foggy weather, such as regions
close to a body of water.
Fog is similar to mist; both are the appearance of water droplets suspended in
the air, but fog is the term applied to the condition when visibility is less than 1 km.
Next Topic: Fractus Clouds
Weather Topic: What is Freezing Rain?
Home - Education - Precipitation - Freezing Rain
Next Topic: Graupel
Freezing rain is a condition where precipitation which has fallen in the form of
water droplets reaches temperatures which are below freezing and freezes upon
coming into contact
with surface objects. The result of this precipitation is a glaze of ice which
can be damaging to plants and man-made structures. A severe onset of freezing
rain which results in a very thick glaze of ice is known as an ice storm.
Next Topic: Graupel
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