Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 311115

Area Forecast Discussion
National Weather Service Sacramento CA
415 AM PDT WED AUG 31 2016

Dry weather with below average temperatures this week. Locally
breezy at times...mainly in the Delta and over ridgetops.



Temperatures are running a few degrees warmer early this morning
compared to 24 hours ago, as high cloudiness associated with a
weak disturbance moved across the area overnight. Marine layer is
very shallow this morning on the Ft. Ord profiler, and thus no
stratus intrusion is expected.

The primary weather feature this week is an upper-level trough of
low pressure along the West Coast, as indicated by water vapor
satellite imagery. Main impacts from this system will be synoptic
cooling, as well as locally breezy winds near the Delta-
influenced area and over mountain ridgetops. Dry weather is
expected across our area, as models keep precipitation well to
the north. Upper level trough is progged to shift inland Thursday
into Friday. High temperatures are expected to be near to below
normal during this period. Valley temperatures should remain in
the 80s to low 90s the rest of the week, with 60s-70s for the
foothills and mountains.


Longwave trough axis begins to shift east Sunday. However the
surface high pressure moving into Oregon will not be strong enough
to cut off the onshore gradient in the Delta region. Another
shortwave trough will dig into NorCal Tuesday keeping the offshore
winds battling the onshore winds. Any precipitation is expected
to remain north of the state. Temperatures will creep up in the
extended, but still remain near to just above normal.   JClapp



VFR conditions across TAF sites next 24 hours. SW flow aloft with
gusty ridge winds, especially over Sierra. Expect gusts 25 to 30
knots into Delta. Minimal marine stratus this morning, but should
thicken into Vallejo tonight and Thursday morning.   JClapp


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