Area Forecast Discussion
Issued by NWS Sacramento, CA

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FXUS66 KSTO 290955

Area Forecast Discussion
National Weather Service Sacramento CA
255 AM PDT Thu Jun 29 2017

Slightly warmer temperatures today with warm conditions through
the weekend. Slightly cooler next week but remaining a Little
warmer than normal. No mountain thunderstorms expected through the
extended period.


Fair skies over the CWA this morning under high amplitude upper
level ridge over the eastern Pacific. Still have a fairly healthy
delta breeze blowing this morning with a moderate marine layer
hanging in at around 1600 feet. Some coastal stratus moving into
the Bay area and may see some patchy stratus this morning western
Solano county. Airmass warms a bit today as upper ridge axis
centers over the area so expecting high temperatures today a few
degrees over yesterday. Subsidence and stability over the region
under the ridge will keep any mountain thunderstorm threat
out of the forecast over the next several days. Upper ridge axis
crosses over the north state Friday bringing more warming with
daytime highs expected to reach up to about 10 degrees above
normal. A moderate delta breeze is expected to continue but high
pressure ridging will keep the marine layer and stratus intrusion
into the delta minimal. A weak upper trough passing through the
Pacific Northwest on Saturday will have minimal impact on CWA
weather with its main impact to keep daytime highs Saturday from
climbing. Upper ridging moves quickly back over the west coast
bringing a slight warming again on Sunday.



High pressure aloft will create warm and dry conditions across
northern California with temperatures near normal. A trough
pattern could develop for the middle of next week, but model
forecasts are still a bit uncertain and lack agreement. If a
trough does develop, temperatures could drop a few degrees but
will still remain near normal. Best lift dynamics appear to remain
well north of the forecast area, so any development for
precipitation looks very limited at the moment. However, a
mountain shower or thunderstorm cannot be ruled out Wednesday or
Thursday of next week.



VFR conditions the next 24 hours. Winds will remain south to west
today, generally below 10 kt across Valley TAF sites. Near the
Delta...SW wind gusts up to 30 kt possible.



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