Area Forecast Discussion
Issued by NWS San Francisco Bay Area, CA
FXUS66 KMTR 272053
Area Forecast Discussion
National Weather Service San Francisco Bay Area
153 PM PDT SAT AUG 27 2016
.SYNOPSIS...Temperatures will remain near to slightly below
seasonal averages through early next week before further cooling
by midweek as an upper level trough pushes inland to our north.
This pattern will change little through late next week with
continue below average temperatures and widespread night/morning
.DISCUSSION...as of 01:52 PM PDT Saturday...The overall weather
pattern across the region will change very little through tonight.
This should give way to another night of low clouds spreading well
inland into most valley locations as the marine layer generally
remains above 2,500 feet in depth. With this, expecting a mostly
uniform cloud deck with very little in the way of fog development
over inland areas.
While high pressure builds slightly toward the southern and central
California coast from the southwest on Sunday, little change is
anticipated in regards to temperatures. Overall, temperatures will
remain near to slightly below seasonal averages, especially inland.
As the high pressure builds aloft, may see the marine layer compress
some during the day Sunday and into Monday morning. Again, this
should result in very little change in our weather conditions
through early next week.
Inland temperatures will trend downward on Tuesday and through
midweek as a mid/upper level trough pushes into northern
California. The forecast models (especially the GFS) show a slight
chance of precipitation over northern California as the system
pushes inland on Tuesday. However, moisture will be limited across
our region and chances for any measurable rainfall over the North
Bay appears low at this time. Thus, will hold off on adding a
mention into the forecast for now. However, will be worth keeping
an eye on in the coming days.
The larger scale trough over the West Coast will deepen slightly
Wednesday into Thursday and will keep temperatures below seasonal
averages through at least late next week. With this, do expected a
continued marine influence across the region with late night and
morning low clouds spreading well inland before giving way to mostly
sunny skies during the afternoon hours.
.AVIATION...as of 11:00 AM PDT Saturday...MVFR cigs across the
board with higher based marine stratus deck in place. Marine
stratus will retreat from inland valleys through the next 2 hours.
Generally light southerly/southwest winds this morning shifting to
onshore winds along the coast by the afternoon. The marine layer
will compress and result in lower ceilings for tonight as a result
of short wave ridging developing into Sunday.
Vicinity of KSFO...MVFR cigs through 1845Z.
SFO Bridge Approach...Similar to KSFO.
Monterey Bay Terminals...MVFR through 19-20Z. Southerly winds may
wrap stratus around the northern lip of the Monterey Bay into the
.MARINE...as of 01:52 PM PDT Saturday...Light wind and seas will
continue through the remainder of the weekend. Northwest winds
increase early into next week. A mixed short period northwest
swell and a smaller long period southerly swell will continue to
move through the coastal waters.
PUBLIC FORECAST: RGass
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