Weather Alert in Washington
Blizzard Warning issued March 9 at 1:42PM PDT until March 11 at 11:00PM 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, continued snow. Additional snow accumulations between 6 and 10 inches. For the Blizzard Warning, blizzard conditions expected. Winds gusting as high as 40 mph Wednesday evening into late Wednesday night. Total snow accumulations up to 2 feet. For the Winter Storm Watch, continuing heavy snow possible. Total snow accumulations up to 4 feet possible. * 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 Blizzard Warning, from 5 PM Tuesday to 11 PM PDT Wednesday with the strongest winds peaking late Wednesday night. For the Winter Storm Watch, from Wednesday evening through Friday morning. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Travel could be very difficult to impossible. Gusty winds could bring 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. The strongest winds will peak Wednesday evening into late Wednesday night.
INSTRUCTION: Travel should be restricted to emergencies only. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle. Prepare for possible power outages. Monitor the latest forecasts for updates on this situation. Slow down and use caution while traveling. Prepare for possible power outages.
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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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