Area Forecast Discussion
Issued by NWS Sacramento, CA

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344
FXUS66 KSTO 301030
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
330 AM PDT MON MAY 30 2016

.SYNOPSIS...
Very warm weather expected this week as high pressure strengthens.

&&

.DISCUSSION...
Clear skies across interior NorCal early this morning except for
some high clouds spilling over the ridge along 130W. The mountain
valleys are cool - mainly in the 30s and 40s under clear skies
while the valley and foothills are generally on the mild side with
current temps in the mid 60s to lower 70s, except in the mid 50s
to around 60 through the Delta and into the Sacramento and
Stockton region.

The main weather story for the region this week will be hot
weather as the ridge over the eastern Pacific shifts over NorCal
to kick off meteorological summer. Warmest temperatures will be
around the century mark in the Central Valley as 850 mb temps
climb into the lower to mid 20s C and subsidence increases. A
Delta trickle should persist through the week shaving a few
degrees off temps around Fairfield.

Little if any late day shower and thunderstorm activity is
expected over the northern Sierra.

&&

.EXTENDED DISCUSSION (FRIDAY THROUGH MONDAY)...
Strong high pressure will rule the area through the end of the
work week into the start of the weekend with well above normal
temperatures. Models continue to advertise a closed upper low
approaching the CA coast by late Saturday into Sunday. Differences
remain with track of low and how far south into CA it will move
before being ingested into larger scale trough. GFS paints more
widespread precip, mainly across higher elevations. ECMWF with
further south solution/less widespread precipitation. For now,
have included chance of showers and thunderstorms across higher
elevations for the end of the weekend, until discrepancies are
better resolved. Regardless, should lend itself to some relief
from the heat with temperatures on Sunday around 5 to 10 degrees
cooler than Saturday and increasing flow through the Delta. CEO

&&

.AVIATION...
VFR conditions for TAF sites with light winds. A few
thunderstorms near the Sierra crest, south of Lake Tahoe this
afternoon/evening.

&&

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

&&

$$



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