Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 222224
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
324 PM PDT Fri Aug 22 2014

.Synopsis...
A weak trough over the west coast with northwest flow aloft will
bring dry conditions and daytime temperatures a few degrees below
normal through early next week. High pressure moving inland over
the west coast will bring warming to near or a little above normal
Tuesday through Friday.

&&

.Discussion...
Upper level low over the Pacific Northwest with associated trough
down into northeastern California and Nevada today. This is
bringing a few clouds across the Northeastern portion of the area
from Shasta county through Western Plumas County along with
increasing onshore flow along with breezy southwest winds through
the Delta and over the ridges and around the Burney Basin. Low
clouds around the Delta dissipated by 11 am this morning but
should return again Saturday morning with some patches possible in
the Southern Sacramento Valley Saturday morning. The trough digs
over the Western U.S. on Saturday leaving Northern California in
dry Northwest flow aloft. High temperatures will be in the mid 80s
to mid 90s in the Valley and low 60s to low 80s in the mountains
on Saturday which is near to a little below normal for this time
of year. Similar temperatures are expected on Sunday with the
trough remaining over the Western U.S. The NAM is showing a weak
wave moving through on Sunday which may bringing a little
instability for some cumulus development over the Sierra crest but will
not mention thunderstorms at this time. High pressure starts to
build in from the Eastern Pacific and the trough gradually shifts
east on Monday.

.Extended Discussion (Tuesday through Friday)

Upper trough progresses east and an upper ridge dominates the
western U.S bringing warmer temperatures Tue to Thu. Ridge will
bring the warmest temperatures around Wed with daytime highs
coming in a bit above normal. Ridge weakens towards Fri next week
allowing for a slight cooling especially near the delta but
extended models differ on details. All solutions keep forecast
area dry through the extended period.    JClapp


&&

.Aviation...

NW flow aloft over NorCal with VFR conditions next 24 hrs except
potential Stratus MVFR/IFR ceiling west of I-680 and Cordelia til
around 18z Saturday. Locally NW to SW surface gusts 25 to 30 kts
over higher mountain terrain and thru Delta this aftn into eve.
JClapp


&&

.STO Watches/Warnings/Advisories...
None.
&&

$$






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