Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 241027

327 AM PDT Sun May 24 2015

Warmer temperatures with showers and thunderstorms expected this
weekend into mid next week, mainly over mountains. High pressure
dries things out by late in the week.


.Discussion (Today through Wednesday)...
Our region will be between high pressure over the eastern Pacific
and our exited low pressure now over the Rockies. The threat of
shower and thunderstorm still continues toward the crest of the
Coastal Range and Sierra. Skies will be a lot clearer today with
warmer temperatures. The wave passage means a reprieve from the
marine stratus threat into the valley this morning, as the
coastal profilers at Ft Ord and Bodega Bay show the marine layer
mixed out.

On Monday another reinforcing wave will move over the Pacific
Northwest with the tail end of the trough dipping down into the
far northern part of the state. This will continue the shower and
thunderstorm activity over the mountains and bring a slight chance
for some activity to the far northern end of the central valley.
This will also act as a catalyst for a thicker marine layer, and
greater potential for it`s formation past Cordelia and Travis.

On Tuesday and Wednesday the low over the Pacific Northwest will
move slightly eastward. This should result in less precipitation
over the interior but still some isolated activity remaining over
the mountains. Afternoon temperatures will be near or just above
normal.     JClapp


.Extended Discussion (Thursday through Sunday)
Temperatures forecast finally return to above normal levels late in
the week across interior NorCal as upper ridging develops along
the west coast. The building ridge will also result in less
diurnal mountain shower and thunderstorm activity. Some cooling
is expected next weekend as another trough approaches the west
coast and nudges the ridge east into the Rockies.


General VFR conditions expected next 24 hours except areas of
MVFR across the higher elevations of the northern Sierra Nevada.
Scattered showers and thunderstorms over the Coastal Range and
northern Sierra Nevada 22Z-02Z. Local southwesterly wind gusts to
30 kts continue through the Delta.


.STO Watches/Warnings/Advisories...

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