Area Forecast Discussion
Issued by NWS Sacramento, CA

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396
FXUS66 KSTO 242151
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
251 PM PDT SAT SEP 24 2016

.SYNOPSIS...
Dry weather with above normal temperatures into next week. Breezy
north winds and low humidity expected this weekend.

&&

.DISCUSSION...
A strong ridge of high pressure will build over the region this
weekend and persist through early next week. Temperatures will be
warming into the upper 80s to mid 90s for the valley today with
continued warming for Sunday. Sundays high temperatures will warm
between 95 to 100 degrees. Very warm temperatures will continue
through early next week.

Locally breezy north winds mainly for the west side of the valley
and for some foothill and mountain locations will persist this
weekend. The winds in the mountains will increase this evening
with local gusts up to 35 mph and persist through Sunday morning
before tapering.

Temperatures at night should cool off nicely with the
exception of the thermal belt areas and tonight for the north end
of the valley since the north winds look like they may stay up
for most of the night to help keep temperatures much warmer than
the rest of the valley.

.EXTENDED DISCUSSION (Wednesday THROUGH Saturday)


Upper high pressure shifts east as a series of upper level
systems push into the Pacific Northwest sometime late next week.
Looks like main impacts should be a gradual cooling trend during
the extended period. High temperatures could be up to 10 below
normal for this time of the year. Model output keeps the forecast
area mainly dry, except for a slight chance of showers over the
Coastal Range and over far northern interior California. Have
added precipitation chances towards the end of the week given
model consistency.

&&

.AVIATION...

VFR conditions over interior NorCal next 24 hrs. Generally light
winds across TAF sites mainly after 00Z, except gusts to 30kts over
higher elevations after 04Z.

&&

.STO Watches/Warnings/Advisories...
Red Flag Warning until 6 PM PDT Sunday for Central Sacramento
Valley in Glenn, Colusa, Yuba, Northern Sutter, and Butte County
Below 1000 Ft-Eastern Mendocino NF-Eastern Portion of
Shasta/Trinity NF-Lake County Portion of Lake-Napa-Sonoma Unit-
Northern Sacramento Valley to Southern Tehama County Line Below
1000 Ft-Northern Sierra Foothills from 1000 to 3000 Ft. Includes
portions of Shasta-Trinity and Butte Units-Northern Sierra
Including Lassen NP and Plumas and Lassen NF/S West of the
Sierra Crest (West of Evans Peak-Grizzly Peak-Beckworth Peak)-
Southeast Edge Shasta-Trinity NF and Western Portions of Tehama-
Glenn Unit-Southern Sacramento Valley in Yolo-Sacramento Far
Western Placer, southern Sutter and Solano County Below 1000 Ft.

&&

$$



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