Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 082310

Area Forecast Discussion
National Weather Service Sacramento CA
310 PM PST Fri Dec 8 2017

Little change with dry weather into next week with chilly nights
and mild days.


Omega blocking pattern continues along the West Coast with dry
weather expected through next week. Some high cloudiness continues
to stream over Interior NorCal as baroclinic cirrus pushes
through the ridge. This likely to continue over the next severals
days as upper high weakens and begins to slowly progress.
Cloudiness is causing temperatures this afternoon to be running
upwards of 8 degrees cooler than 24 hours ago.

Little change in the synoptic pattern through the weekend as
strong upper high remains quasistationary over NorCal. Some patchy
morning frost possible in the colder valleys. Max temps remain
similar tomorrow with a few degrees lower Sunday. Upper high
weakens slightly and shifts over the Intermountain West Mon. High
temperatures lower slightly early next week, but remain above



Strong upper level ridging will continue to remain anchored
overhead through late next week. As a result, stable conditions
will persist with highs above seasonal averages and cool nights.
Some patchy valley fog will continue to be possible nights and
mornings. Although timing differences are evident, model guidance
indicates an upper disturbance moving into the Pacific Northwest
that might weaken the ridge temporarily sometime Friday into the
weekend. At this point, precipitation appears to remain north of
the forecast area, leaving interior NorCal dry.


VFR conditions over interior NorCal next 24 hours, though areas
of MVFR visibility are possible for the northern San Joaquin and
southern Sacramento valleys 12z-18Z Saturday. Surface winds
generally below 10 kts.



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