Area Forecast Discussion
Issued by NWS Sacramento, CA

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000
FXUS66 KSTO 221533
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
833 AM 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 trough over the Pacific Northwest and dipping into
Northern California this morning. This is bringing a few clouds
across the far north and has increased the onshore flow and
deepened the marine layer a little (around 1600 ft on the Fort Ord
Profiler) for low clouds in the Delta region this morning to
around Rio Vista and Fairfield. A little cooler temperature this
afternoon compared to yesterday with highs in the mid 80s to low
90s in the Valley and 60s and 70s in the mountains. Breezy
southwest winds through the Delta and over ridgetops and around
the Burney Basin today. The trough digs into the Great Basin on
Saturday leaving Northern California in dry Northwest flow aloft.
Temperatures will warm up a little on Saturday to near to a little
below normal for this time of year and will remain similar 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
but will not mention thunderstorms at this time. High pressure
starts to build in from the Eastern Pacific and the trough shifts
east on Monday. This will bring the start of a warming trend that
may continue into mid week.

.Extended Discussion (Tuesday through Friday)

Ridge of high pressure will slide over the western U.S bringing
warmer temperatures into mid-week. Ridge axis over the west coast
will bring the warmest temperatures around Wednesday with daytime
highs coming in just a bit above normal. Ridge weakens towards the
end of 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.

&&

.Aviation...

NWly flow alf ovr Intr NorCal with VFR conds nxt 24 hrs exc isold
MVFR/IFR conds poss in ST vcnty Delta til arnd 18z Fri. Lcl SWly
sfc wnd gsts to 30 kts poss ovr hyr mtn trrn and thru Delta into
this evening.


&&

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

$$






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