Weather Alert in Washington
Flood Warning issued March 18 at 7:59PM PDT until March 21 at 3:59AM PDT by NWS Seattle WA
AREAS AFFECTED: King, WA
DESCRIPTION: ...The Flood Warning is extended for the following rivers in Washington... Tolt River Above Carnation affecting King County. * WHAT...Minor flooding is forecast. * WHERE...Tolt River above Carnation. * WHEN...Until early Saturday morning. * IMPACTS...At 5,000.0 cfs, the Tolt River will flood Tolt River Rd NE and many driveways. Some homes in the San Souci area could be inaccessible due to deep and quick flood waters. This river level on the Tolt corresponds to a phase 3 flood in the King County flood system. * ADDITIONAL DETAILS... - At 6:15 PM PDT Wednesday the flow was 4,230.0 cfs. - Flood flow is 5,000.0 cfs. - Forecast...The river will continue to fall, reaching its lowest flow at 3,343.7 cfs late tonight. It expected to begin rising again by early Thursday afternoon, achieving flood stage by late Friday morning and reaching a secondary crest at 5,447.4 cfs by late Friday afternoon. It will fall below flood stage again Friday night. - 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 400 AM 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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