Area Forecast Discussion
Issued by NWS Sacramento, CA

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000
FXUS66 KSTO 282215
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
315 PM PDT TUE JUN 28 2016

.SYNOPSIS...
Hot and mainly dry weather this week. Isolated late day
thunderstorms possible over the mountains.

&&

.DISCUSSION...
24 hr temp trends at 20z were running close to yesterday...albeit
there was less of a N/NWly zephyr at the surface than yesterday. Max
temps still expected to trend similar to yesterday...although the
Carquinez Strait and portions of the west Delta may be a degree or
two cooler. Still can`t rule out the potential for a record tying
max temp for DTS this afternoon...given the late "run-for-glory"
with a SW wind and minimal marine layer as air from the hot
pavement of US-50 wafts over the DTS sensor late in the day. The
table below shows the records for the rest of the month and
illustrates that only DTS has a chance/potential for a record
tying max temp today.

    June 28th       June 29th       June 30th

RDD  108 (2013)     108 (2013)      113 (2015)
City 111 (1918)     111 (1974)      112 (1950)
RBL  112 (1977)     114 (1950)      113 (2015)
DTS  108 (2009)     107 (2013)      112 (1934)
SAC  108 (2009)     107 (2013)      109 (1950)
MYV  111 (2009)     109 (2013)      111 (1934)
SCK  110 (2009)     106 (2013)      110 (1972)
MOD  111 (2009)     109 (2009)      108 (1950)

An upper trof approaching the Pac NW coast will nudge the Wrn
portion of the 4-Corners High Ewd on Wed with a weak "baggy" trof
establishing itself over the region Thu/Fri. The short-wave along
the SErn CA/Srn NV border will work its way Nwd tonight and Wed
bringing some monsoonal moisture with it and the chance of
T-storms mainly S of Tahoe. Some of the moisture may result in
some patchy cloudiness over the Nrn SJV zone...and Srn portions of
the Motherlode/Sierra Nevada zones later tonite and Wed...however
most of the T-storm activity should be E of the Sierra Crest. Late
Wed...Thu...Fri the aforementioned upper trof is expected to
weaken the ridge enough Norcal to initiate minor cooling. The
small chance of T-storms over portions of the mtns will continue
on Thu although moisture will be lacking as the monsoonal moisture
will be shunted Ewd by the upper trof. Some moisture could remain
along the Sierra Crest for some afternoon CU/TCU on Fri.   JHM

&&


.EXTENDED DISCUSSION (Saturday THROUGH Tuesday)

Upper troughing regime will persist along the Pacific Northwest during
this forecast period. This pattern should result in near-normal temperatures
across interior northern California this weekend into early next
week. Dry conditions are expected, with daytime highs in the 90s
across the Valley, and 70s-80s over higher elevations.


&&

.AVIATION...


VFR conditions next 24 hour period across TAF sites. Light winds
generally less than 10 knots, except for occasional gusts near
the Delta region.
&&

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

$$


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