Weather Alert in Oregon
Winter Storm Watch issued March 13 at 4:01AM PDT until March 15 at 5:00PM PDT by NWS Pendleton OR
AREAS AFFECTED: East Slopes of the Oregon Cascades
DESCRIPTION: * WHAT...For the Winter Storm Warning, heavy snow expected above 4000 feet; total snow accumulations of 6 to 12 inches. For the Winter Storm Watch, heavy snow possible; total snow accumulations of 8 to 16 inches possible above 4000 feet and 2 to 4 inches below 4000 feet. * WHERE...East Slopes of the Oregon Cascades. * WHEN...For the Winter Storm Warning, until 11 PM PDT this evening. For the Winter Storm Watch, from late tonight through Saturday afternoon. * IMPACTS...Significant snowfall with periods of heavy snowfall rates will combine with low visibility to create very difficult driving conditions, especially along US-20 over Santiam Pass.
INSTRUCTION: Persons should consider delaying travel if possible. If travel is absolutely necessary, drive with extreme caution and be prepared for sudden changes in visibility. Leave plenty of room between you and the motorist ahead of you, and allow extra time to reach your destination. Avoid sudden braking or acceleration, and be especially cautious on hills or when making turns. Make sure your car is winterized and in good working order.
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Weather Topic: What is Hail?
Home - Education - Precipitation - Hail
Next Topic: Hole Punch Clouds
Hail is a form of precipitation which is recognized by large solid balls or
clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind.
As the hailstones remain in the updraft, ice is deposited onto them until their
weight becomes heavy enough for them to fall to the earth's surface.
Hail storms can cause significant damage to crops, aircrafts, and man-made structures,
despite the fact that the duration is usually less than ten minutes.
Next Topic: Hole Punch Clouds
Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
