Weather Alert in Washington
Flood Warning issued March 18 at 5:58PM PDT until March 22 at 10:39AM PDT by NWS Seattle WA
AREAS AFFECTED: Snohomish, WA
DESCRIPTION: ...The Flood Warning continues for the following rivers in Washington... Snohomish River At Snohomish affecting Snohomish County. .Heavy rain over the Central Cascades combined with higher snow levels will push the Snohomish River at Snohomish above flood stage this evening. * WHAT...Moderate flooding is forecast. * WHERE...Snohomish River at Snohomish. * WHEN...Until late Sunday morning. * IMPACTS...At 27.0 feet, the Snohomish River will flood several roads...including the Snohomish-Monroe highway...and low areas of the lower Snohomish valley that are not protected by levees. A stage of 27 feet on the Snohomish River corresponds roughly to a Phase 2 in the Snohomish County flood program. * ADDITIONAL DETAILS... - At 5:00 PM PDT Wednesday the stage was 24.9 feet. - Flood stage is 25.0 feet. - Forecast...The river will rise above flood stage this evening and is expected to crest at 27.1 feet by early Thursday afternoon. It will fall below flood stage Friday morning to 24.4 feet Friday afternoon. It will then rise above flood stage again early Saturday morning, cresting at 26.0 feet by late Saturday morning. It will fall below flood stage again Saturday evening. - 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. Additional information is available at www.weather.gov. The next statement will be issued by late tonight at 200 AM PDT.
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Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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