Area Forecast Discussion
Issued by NWS Sacramento, CA

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000
FXUS66 KSTO 130455
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
955 PM PDT Sat Apr 12 2014

.Synopsis...
High pressure and well above normal temperatures will continue into
early next week, followed by a series of weak troughs that move
through northern California by the middle of next week.

&&

.Short Term Discussion (Today through Tuesday)...
Strong Delta breeze continues this evening with KSFO-KSAC surface
pressure gradient at a little over 3 MB. Fort ORD profiler showing
an elevated marine layer with top around 3000 feet. Fog products
reveals stratus has worked its way into the Delta. Bufkit profiles
showing some low level moisture in the Southern Sac Valley tomorrow
morning, however extent of stratus intrusion into the Central Valley
should be limited as MOS guidance suggesting Delta breeze will trend
downward overnight.

Offshore upper ridge will slowly progress towards the coast through
the weekend as surface high pressure builds across the PacNW into
the Great Basin. Locally breezy N to E winds develop tomorrow
morning and continue into early Monday. Upper ridge axis shifts
inland over the area early Monday then weak short wave troughs
progged through Monday afternoon into evening with another on
Tuesday. As a result, expect slight cooling in temperatures early
next week with highs in the Central Valley trending from the lower
80s Sunday to mid 70s Tuesday.

PCH


.Extended Discussion (Wednesday through Saturday)

NorCal will remain in northwest flow on Wednesday as a trough
digs into the Intermountain West, east of the area. This will cool
off temperatures slightly and bring some dry northerly winds
across the area. Some brief ridging takes place late Wed into
Thursday boosting daytime temperatures a few degrees warmer,
before a disturbance swipes the PacNW Thursday night. This may
result in a slight chance of showers for far NorCal Thursday night
into Friday, though main energy and moisture remain farther north
keeping most of interior NorCal dry.

A Pacific trough is progged to approach the far Northern CA
coastline by the weekend, though model confidence metrics show
little predictability in this feature. Have kept a slight chance
of precip for the mountains and Shasta County mainly north of
Interstate 80. Shen


&&

.Aviation...

Offshr upr rdg sloly movs twds the Cal ovr the nxt svrl days. Mnly
VFR for Intr NorCal nxt 24 hrs exc lcl IFR in ST vcnty Delta and
poss into Srn Sac Vly til 19z Sun. Lcl SWly sfc wnd gsts to 35 kts
poss in Delta...dcrsg ovngt into Sun mrng.

&&

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

$$









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