Nelson, California

... Snow expected in the mountains Wednesday into Thursday...

A cold low pressure system over the Gulf of Alaska will approach
California Wednesday and Wednesday night. As the cold front moves
through interior northern California Wednesday into early
Thursday... moderate to occasionally heavy precipitation is
possible over the mountains.

In the mountains... rain and snow will begin in the Lassen park area
and Shasta County mountains by Wednesday afternoon... and shift
into the west slopes of the Sierra Wednesday evening. Occasional heavy
showers are possible near the cold front as it moves south across
the region Wednesday afternoon into early Thursday morning. Snow levels
could drop down to around 3500 feet in the Shasta County mountains
and down to around 5000 feet over the Sierra by Thursday morning
behind the cold front. Showers are expected to linger over the
Sierra during the day Thursday. Snowfall accumulations of several
inches are possible above 6000 feet between Wednesday and
Thursday. Southwest wind gusts up to 50 mph are also possible
over the higher terrain with this system. The snowfall and the
gusty winds will bring winter driving conditions to the mountains
which may impact travel over the higher mountain passes on
Wednesday and Thursday.

If your plans call for travel into the Sierra or Lassen park area
Wednesday afternoon into Thursday... be prepared for winter driving
conditions. Monitor the latest National Weather Service forecasts
and statements for updates about this storm.

413 PM PST Mon Nov 9 2009

... A colder storm could affect the region Wednesday into Thursday...

A weak weather system will move through the Shasta County mountains
and Lassen park area tonight with scattered showers. Impacts from
this system are expected to be minimal as snow levels will remain
near 7000 feet tonight.

A colder low pressure system over the Gulf of Alaska will
approach California Wednesday and Wednesday night. This storm
could drive a cold front with moderate to occasionally heavy
showers from Sacramento to Modesto Wednesday night into Thursday
morning.

In the mountains... rain and snow may return to the Lassen park
area and Shasta County mountains Wednesday afternoon... and shift
into the west slopes of the Sierra Wednesday night. Occasionally
heavy showers are possible near the cold front as it moves south
across the region Wednesday night into early Thursday morning.
Snow levels could drop below 6000 feet Wednesday night. This storm
has the potential to have an impact on travel in the mountains.

There is some uncertainty about how much snow will fall in the
mountains because some of the energy from this storm may remain
offshore. There is a possibility of snowfall down to 5500 feet
Wednesday night and Thursday morning. Occasional moderate to heavy
snow showers and gusty winds could make travel difficult over
higher mountain passes during this time.

If your plans call for travel into the Sierra or Lassen park area
Wednesday night and Thursday... be prepared for winter driving
conditions. Monitor the latest National Weather Service forecasts
for updates and future statements about this developing storm.