Winter Storm Watch, Winter Weather Advisory  Statement as of 8:47 PM PST on November 20, 2009

... Winter Weather Advisory remains in effect until 4 PM PST
Saturday...
... Winter Storm Watch now in effect from Saturday afternoon
through Sunday afternoon...

The Winter Storm Watch for snow in effect from Saturday afternoon
through Sunday afternoon. A Winter Weather Advisory for snow
remains in effect until 4 PM PST Saturday.

A cold air mass has spread over the forecast area... allowing snow
levels to fall to 2500 feet in South Washington Cascades... and to
3000 feet in the north Oregon Cascades. New accumulations of snow
for through early Saturday are expected to total 8 to 12 inches.

Another front will arrive later Saturday. This will bring another
round of significant snow to the Cascades as snow levels remain
low. On Saturday... snow levels will rise briefly to 3500 feet in
South Washington and to 4000 feet in Oregon... but fall back to
2000 to 2500 feet Saturday night. New accumulations of snow of 12
to 18 inches are likely Saturday afternoon through Sunday.

Precautionary/preparedness actions...

A Winter Weather Advisory for snow means that periods of snow
will cause primarily travel difficulties. Be prepared for snow
covered roads and limited visibilities... and 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.