Weather Alert in Washington
Winter Weather Advisory issued March 9 at 5:35AM PDT until March 10 at 5:00PM PDT by NWS Seattle WA
AREAS AFFECTED: Cascades of Southern King County; Cascades of Pierce and Lewis Counties
DESCRIPTION: * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations between 4 and 8 inches. Winds gusting as high as 35 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 2 and 4 ft possible. Winds could gust as high as 45 mph on Wednesday. * WHERE...Cascades of Pierce and Lewis Counties and Cascades of Southern King County. * WHEN...For the Winter Weather Advisory, until 5 PM PDT Tuesday. For the Winter Storm Watch, from late Tuesday night through Friday morning. * IMPACTS...Snow-covered roads may make travel conditions difficult to impossible at times through the mountains and cause delays. Temporary road closures possible. Gusty winds may limit visibility at times and down tree branches. * ADDITIONAL DETAILS...Lower elevations up to and including Snoqualmie Pass may transition over to rain late Wednesday as snow levels briefly rise before lowering again Thursday.
INSTRUCTION: Slow down and use caution while traveling. Prepare for possible power outages. Monitor the latest forecasts for updates on this situation.
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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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