Area Forecast Discussion
Issued by NWS Sacramento, CA

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212
FXUS66 KSTO 160955
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
255 AM PDT Wed Aug 16 2017

.SYNOPSIS...
Temperatures warming back to near or slightly above average.
Slight chances for late-day mountain thunderstorms.

&&

.DISCUSSION...
Mostly clear skies across the region early this morning. Current
temperatures are pretty similar to 24 hours ago and generally
range from the lower 50s in the mountain valleys to around 70
across the warmest portions of the Central Valley.

Short-wave energy continues to drop down the front side of the
ridge building into NorCal from the eastern Pacific. Enough
lingering moisture/instability for another chance for afternoon
thunderstorms over the mountains again today. Otherwise, warmer
weather returns today with synoptic warming of the airmass and
slackening of onshore flow.

Temperatures max out Thursday and Friday as the upper ridge peaks,
then begin to taper a bit by the end of the week as weakness
redevelops along the West Coast and onshore flow strengthens.
Late-day thunderstorm chances continue over the mountains.

&&

.EXTENDED DISCUSSION (Sunday THROUGH Wednesday)
Gradually cooling temperatures along with an increase in diurnal
mountain thunderstorms possible early next week as weakness along
the West Coast morphs into a closed low off the central California
coast. Temperatures around average for mid-late August.

&&

.AVIATION...
VFR conditions through the TAF period. Gusts up to 30 kts through
the Delta. Isolated thunderstorms over the mountains after 22Z.

&&

.STO WATCHES/WARNINGS/ADVISORIES...None.

&&

$$



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