Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 230514
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
1014 PM PDT THU SEP 22 2016


.SYNOPSIS...
Dry with north winds through the weekend. Slightly below normal
temperatures Friday, then well above normal over the weekend and
into next week.

&&

.Discussion...
A cool upper low is shifting eastward across Nevada. Scattered
Sierra showers this afternoon have dissipated and now skies have
mostly cleared and dry weather expected overnight.

Mountain peaks and mountain basins will again drop below freezing
tonight, and some spots may be even cooler than this morning. This
taste of Autumn will be brief, a upper level ridging brings dry and
increasingly warmer temperatures to near normal levels Friday, and
well above normal for the weekend. Sunday afternoon could see triple
digits return to the northern Sacramento Valley.

Some high level cloudiness may be spilling over the ridge and into
Norcal on Fri. We may need to up the cloud cover some in our CWA for
the Fri SKY grids in the upcoming early morning forecast. Then
sunnier wx/clearer skies for the weekend as upper ridging
strengthens.   EK/JHM


.EXTENDED DISCUSSION (Monday THROUGH Thursday)

Strong high pressure from EPAC forecast to impact Interior NorCal
through early part of extended forecast period. High temperatures
expected to be 5 to 10 degrees above normal into Monday. Upper
high shifts into the Great Basin Tuesday as offshore frontal
system moves into Pacific Northwest, lingering into Wednesday.
Deeper troughing pushes into the West Coast towards the end of the
week. Dry weather expected with main impact for Interior NorCal
being a gradual cooling trend with increasing onshore flow. High
temperatures expected to return to near normal by Thursday.
&&

.AVIATION...

Nly flow alf as upr low movs E and EPAC upr rdg blds inld. VFR conds
ovr Intr NorCal nxt 24 hrs.

&&

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

$$


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