Weather Alert in Washington
Winter Weather Advisory issued March 4 at 8:30AM PST until March 5 at 10:00AM PST by NWS Seattle WA
AREAS AFFECTED: Cascades of Snohomish and Northern King Counties; Cascades of Southern King County; Cascades of Pierce and Lewis Counties
DESCRIPTION: * WHAT...Snow is expected across the Central and Southern Washington Cascades. Accumulations of 7-9 inches are possible for elevations between 3500-4500 feet, with locally higher amounts at higher elevation locations. * WHERE...Cascades of Snohomish and Northern King Counties, Cascades of Pierce and Lewis Counties, and Cascades of Southern King County. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Snowfall will be heaviest Wednesday afternoon into Thursday night across Stevens, Snoqualmie, and White Pass.
INSTRUCTION: Slow down and use caution while traveling. Prepare for possible power outages.
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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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