Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 291043
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
343 AM PDT SAT AUG 29 2015
Pacific system moving across region Saturday bringing chance of
precipitation north of I-80. Cooler and drier conditions with
below normal temperatures next week.
Pacific frontal system is approaching the west coast causing a rain
band to move through the area this morning with some isolated
thunderstorms north of Chico. Rain chances will diminish through
Saturday morning and afternoon as the system moves out of the
region. Rain totals expected to be less than 0.10 inch across the
northern valley, mainly north of I-80. Highest amounts expected
over the Coastal Range and western Shasta Mountains. After front
passes the northern valley, expect increased cloud cover,
especially over Shasta and Tehama counties. This increased cloud
cover will result in high temperatures 10 to 15 degrees below
yesterday. Highs in the valley in mid to high 80s, with the
foothills reaching mid to high 70s.
Showers from this frontal system may linger over the eastern
mountains this evening, but will quickly dry out after sunset.
Sunday will be drier with clearer skies. Temperatures will warm
slightly, but remain below normal through early next week.
.EXTENDED DISCUSSION (Wednesday THROUGH Saturday)
Northern California will remain under the influence of a large
scale trough pattern through the extended period. This will likely
keep temperatures below normal through the end of next week. The
GFS continues to hint at a deeper trough bringing precipitation to
far northern CA late next week. The consensus suite of models
leaves things dry however, and our forecast hedges toward the
VFR conditions continue. Weather system currently moving through
the area, with scattered showers and a few thunderstorms possible
through early afternoon north of I80. Southwest winds 10-15 kt
with local gusts up to 30 kt will begin to subside this evening.