Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 241611
AFDSTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
911 AM PDT Sun May 24 2015

.Synopsis...
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)...

Today the region will be between high pressure out over the
pacific and low pressure the Rockies. Shower and thunderstorm
chances will continue over the mountains for the afternoon but
they should be located more towards the crest. Skies will be a lot
clearer today and temperatures will warm up to around normal for
most areas. A number of areas are already running 3 to 5 degrees
warmer at this time when compared to yesterday.

On Monday another low pressure area 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.

On Tuesday 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. The low does not moves that far from Tuesday into
Wednesday so expect similar chances for thunderstorms over the
mountains. Temperatures will also be warming up into the 80s to
lower 90s by midweek.
&&


.Extended Discussion (Thursday through Sunday)

Temperatures forecast to return to above normal levels across the
interior of NorCal for the first time in awhile late in the week
as upper ridging develops along the west coast. The building ridge
will also result in less diurnal shower and thunderstorm activity
over the mountains. Some cooling is expected next weekend as
another trough approaches the west coast and nudges the ridge east
into the Rockies.

&&

.Aviation...

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 Coast Range and
northern Sierra Nevada 22Z-02Z. Local southwesterly wind gusts to
30 kts through the Delta aft 23z.

&&

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

$$






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