Weather Alert in Washington
Flood Warning issued March 14 at 1:02PM PDT until March 16 at 9:24PM PDT by NWS Seattle WA
AREAS AFFECTED: Grays Harbor, WA
DESCRIPTION: ...The Flood Warning continues for the following rivers in Washington... Chehalis River Above Grand Mound affecting Thurston and Grays Harbor Counties. Chehalis River At Porter affecting Grays Harbor County. * WHAT...Minor flooding is forecast. * WHERE...Chehalis River at Porter. * WHEN...Until late Monday evening. * IMPACTS...At 48.0 feet, the Chehalis River in Grays Harbor will flood low pasture lands and some roads. High tidal levels at Aberdeen will worsen flooding along the lower reaches. * ADDITIONAL DETAILS... - At 12:45 PM PDT Saturday the stage was 47.8 feet. - Flood stage is 48.0 feet. - Forecast...The river is expected to rise above flood stage late this afternoon to a crest of 48.7 feet late tomorrow morning. It will then fall below flood stage early Monday afternoon. - 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 this evening at 915 PM PDT.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
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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