Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 021030
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
330 AM PDT WED SEP 2 2015
Temperatures will cool to below average the remainder of the week
as a weather system moves into the region. Most showers associated
with the system are expected to remain across the far northern
portion of the state Friday into early Saturday. Milder conditions
return for the latter portion of the Labor Day weekend.
A trough of low pressure is centered along the coast of British
Columbia. The trough will continue to deepen along the west coast
today through Friday bringing cooler temperatures along with
breezy to locally windy conditions. The region will see some
cooling today as onshore flow increases ahead of the approaching
The initial cold front, presently over Oregon, will drop southward
into NorCal on Thursday. This, along with another wave on Friday,
will bring a much cooler airmass into the region for late this
This system does not look like it will bring widespread showers to
most of the area at this time, however, sufficient moisture and
strong dynamics will likely squeeze out some showers and perhaps a
few thunderstorms over the northern third of the forecast area
mainly on Friday and Friday night. Some of the higher peaks in the
southern Cascade Range and far northern Sierra Nevada may see
their first dusting of snow for this season.
The system moves east by early Saturday with showers ending and a
little warmer temperatures returning.
.Extended Discussion (Sunday thru Wednesday)...
Dry weather, generally light winds, and seasonable temperatures
expected Sunday into middle of next week. GFS attempting to
generate weak low off SoCal coast by next Tuesday/Wednesday with
an increase in moisture from SE. ECMWF on the other hand has weak
ridging and continued dry weather. Something to watch for the
VFR conditions expected through the period. Possible stratus
intrusion spreading through Carquinez Straight into Sacramento
area thru 17Z with brief period of MVFR conditions possible but
confidence remains low. Winds generally under 15 kts expect for
Delta region where gusts to 25 kts possible.