Weather Alert in Washington
Flood Warning issued March 21 at 10:16PM PDT until March 22 at 11:15AM PDT by NWS Seattle WA
AREAS AFFECTED: Skagit, WA
DESCRIPTION: ...The Flood Warning is extended for the following rivers in Washington... Skagit River Near Mt. Vernon affecting Skagit County. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Skagit River near Mt. Vernon. * WHEN...Until late tomorrow morning. * IMPACTS...At 28.0 feet, the Skagit River will cause minor flooding from Sedro Woolley downstream through Mount Vernon to the mouth... with shallow flooding in low pasture lands and over a few low-lying roads near the river. This level for this location on the Skagit corresponds to a Phase 3 flood in the Skagit County flood system. * ADDITIONAL DETAILS... - At 9:15 PM PDT Saturday the stage was 28.8 feet. - Flood stage is 28.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 9:15 PM PDT Saturday was 30.4 feet. - Forecast...The river is expected to fall below flood stage late this evening and continue falling to 16.6 feet early Wednesday morning. - http://www.weather.gov/safety/flood
INSTRUCTION: Motorists should not attempt to drive around barricades or drive cars through flooded areas. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Additional information is available at www.weather.gov. The next statement will be issued by Sunday morning at 630 AM PDT.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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