Winter Weather Advisory, Winter Storm Watch
4:15 AM PST
National Weather Service
... Winter Weather Advisory remains in effect until noon PST today...
... Winter Storm Watch remains in effect from 4 PM PST this afternoon
through late tonight...
* timing... snow showers will increase this morning between 4 am
and noon. Slightly warmer temperatures will change the snow to
mostly rain showers by afternoon. Colder air arrives this
evening with a convergence zone possibly producing snow showers
down to sea-level through late tonight.
* Snow amounts... a trace to two inches above about 500 feet this
morning. Tonight... locally up to four inches of additional snow
is possible from north Seattle to Everett and east to the
foothills including the Bellevue area. There is the potential
for even higher amounts if the convergence zone becomes
stationary. Little or no snow accumulation elsewhere around the
Metro region not affected by the convergence zone.
* Snow levels... mainly near 500 feet this morning with
considerable variation. Snow levels will rise this afternoon.
Snow levels will fall to sea level this evening through late
tonight as cold northerly Fraser River outflow develops.
* Impacts... slush on some roadways may cause slippery driving
conditions this morning. Temperatures falling into the 20s
tonight will cause any snow or recent moisture to become icy
during the commute Tuesday morning.
A Winter Weather Advisory for snow means that periods of snow could
cause travel difficulties. Use caution while driving.
A Winter Storm Watch means there is a potential for significant
snow... sleet... or ice accumulations that may impact travel. Continue
to monitor the latest forecasts.