Weather Alert in Washington
Flood Warning issued March 18 at 4:31PM PDT until March 19 at 4:20PM PDT by NWS Seattle WA
AREAS AFFECTED: Snohomish, WA
DESCRIPTION: ...The Flood Warning is extended for the following rivers in Washington... Skykomish River Near Gold Bar affecting Snohomish County. * WHAT...Minor flooding is forecast. * WHERE...Skykomish River near Gold Bar. * WHEN...Until tomorrow afternoon. * IMPACTS...At 15.0 feet, the Skykomish River will cause minor flooding of low pasture lands and low lying roads...including Index-Galena Rd and Tualco Loop Rd. A stage of 15 feet on the Skykomish River corresponds to a Phase 2 in the Snohomish County flood program. * ADDITIONAL DETAILS... - At 3:30 PM PDT Wednesday the stage was 15.0 feet. - Flood stage is 15.0 feet. - Forecast...The river will rise to near 15.5 feet late this evening. It will then fall below flood stage tonight into early Thursday morning. The river will then remain elevated near flood stage through Friday night before receding over the weekend. - Flood History...This crest compares to a previous crest of 15.5 feet on 02/19/1995. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Additional information is available at www.weather.gov. The next statement will be issued by late tonight at 1245 AM PDT.
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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
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
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