Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 190946

246 AM PDT Sat Apr 19 2014

A weak system well to the north will bring slightly cooler
temperatures today. Building high pressure on Sunday will result
in northerly winds and warmer temperatures. A stronger Pacific
trough will approach the coast Monday bringing increasing clouds
and a chance of rain and higher elevation snow on Monday night and
Tuesday. Some areas may also see a chance of thunderstorms. Weak
high pressure will dry things out over the interior by Thursday
but a threat of precipitation will continue across the far
northern sections of the state.


.Short Term Discussion...
A weak shortwave well to the north will produce zonal flow over
the region today and help to bring slightly cooler temperatures.
Weak high pressure will build behind the shortwave to the north to
help produce northerly winds for Sunday and warmer temperatures.
On Monday a stronger shortwave will approach the interior and may
be able to produce a few mountains showers for the afternoon over
the northern sections but at this time the system looks to start
to move inland Monday evening. Have added a slight chance of
thunderstorms for the north end of the valley Monday evening as
better dynamics move over interior.

The system will still be impacting the interior on Tuesday with
showers and thunderstorms expected over most of the interior. Snow
levels will remain above pass level through Monday but lower
Monday night and Tuesday below major pass levels in the Sierra
Nevada. Not a lot of snow or precipitation is forecast at this
time but a couple of inches of snow near pass level look

.Extended Discussion (Wednesday through Saturday)

Slight warming trend begins on Wednesday as the upper low from
Monday and Tuesday moves east of our region and ridging re-
develops along the west coast. This ridge is not forecast to be
strong so lingering light showers are possible over the northern mountains.
Additional warming on Thursday as valley highs return to the mid-
upper 70s. However, by Friday and into the weekend, another upper
trough will move across our CWA bringing a return of more
widespread precipitation and cooler temperatures. JBB



VFR conditions will continue next 24 hours for Central Valley TAF sites.
Generally light winds up to 12 knots expected at TAF sites today.
Breezy winds in the Delta region with 15-25 knot SW winds.


.STO Watches/Warnings/Advisories...

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