Weather Alert in Washington
Flood Advisory issued March 20 at 2:56PM PDT until March 21 at 5:00AM PDT by NWS Spokane WA
AREAS AFFECTED: Chelan, WA
DESCRIPTION: * WHAT...Small stream flooding caused by snowmelt is forecast. * WHERE...A portion of North Central Washington, including the following county, Chelan. * WHEN...Until 500 AM PDT Saturday. * IMPACTS...Minor flooding in low-lying and poor drainage areas is expected due to small stream flooding. * ADDITIONAL DETAILS... - At 253 PM PDT, Snow melt along with areas of rain near the Cascade crest is leading to sharp rises on rivers and streams in Chelan county. Small streams are expected to crest Friday evening and then fall overnight. - Some locations that will experience flooding include... Wenatchee, Chelan, Cashmere, Leavenworth, Chumstick, Merrit, Holden Village, Stehekin, Sunnyslope, Plain, Winton - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
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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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