Weather Alert in Washington
Flood Warning issued March 21 at 9:05AM PDT until March 22 at 12:07PM PDT by NWS Seattle WA
AREAS AFFECTED: Snohomish, WA
DESCRIPTION: ...The Flood Warning is extended for the following rivers in Washington... Snohomish River Near Monroe affecting Snohomish County. * WHAT...Major flooding is occurring and major flooding is forecast. * WHERE...Snohomish River near Monroe. * WHEN...Until early tomorrow afternoon. * IMPACTS...At 17.0 feet, the Snohomish River will cause major flooding...inundating farm land...roads...and some residential areas. Levees will likely suffer damage. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the Snohomish River Basin. A stage of 17 feet at this location corresponds to Phase 2 in the Snohomish County Flood Warning System. * ADDITIONAL DETAILS... - At 8:15 AM PDT Saturday the stage was 18.1 feet. - Flood stage is 15.0 feet. - Recent Activity...The maximum river stage in the 24 hours ending at 8:15 AM PDT Saturday was 18.5 feet. - Forecast...The river is expected to fall below flood stage just after midnight tonight and return to action stage by late Sunday night. It will continue falling to 5.8 feet Tuesday afternoon. - Flood History...This crest compares to a previous crest of 18.0 feet on 02/16/1982. - http://www.weather.gov/safety/flood
INSTRUCTION: Be especially cautious at night when it is harder to recognize the dangers of flooding. 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 this afternoon at 515 PM PDT.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
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A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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