Weather Service Report


219 
FXUS66 KMTR 290539
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco Bay Area
1039 PM PDT Fri Apr 28 2017

.SYNOPSIS...Winds will ease by Saturday morning, giving way to a 
clear and warm weekend. Another round of offshore winds possible 
Monday morning otherwise continued seasonably warm and dry through
Wednesday. Cooling trend may start by the end of next week.

&&

.DISCUSSION...as of 8:50 PM PDT Friday...Clear skies and breezy 
conditions prevail this evening under the continued influence of 
high pressure across the region. Temperatures finished off the day
under clear skies and temperatures in the 60s along the coast and
70s inland with moderate north to northwesterly winds around 10 
to 20 mph. 

A thermal trough situated along the California coast coupled with 
high pressure ridging across the Pacific Northwest will result in
a tighter pressure gradient across Northern and Central California
tonight. The northerly gradient from ACV to SFO is currently at 7
mb and expected to strengthen overnight. While not as strong as 
yesterday northerly winds are forecast to increase to around 15 to
25 mph tonight into Saturday morning with gusts to around 35 mph.
Strongest winds will be over the elevated terrain of the North 
and East Bays. 

Winds should taper by midday Saturday but remain mainly offshore
as high pressure fills in over the Great Basin. The gradual 
warming trend that we have seen over the last couple of day will 
kick into high gear Saturday and continue through early next week.
Temperatures will warm anywhere from 3 to 6 degrees Saturday with
an increase of 2 to 3 degrees each day thereafter. High in the 
70s and 80s are expected across the region this weekend with some
lower 90s expected in the warmest inland valleys early next week.
Warmest days are expected to be Tuesday and Wednesday. 

Winds will remain mostly offshore through midweek with some 
period of gusty winds possible as the combination of the thermal 
trough and strengthening high pressure over the Eastern Pacific 
tighten the gradient over the region once again. 

Clear skies and warm temperatures will prevail through midweek
before the ridge of high pressure begins to break down over the
west coast. By Thursday temperatures will begin to cool back down
to seasonal norms with widespread 60s and 70s. Until then please 
use caution when outdoor and protect young children, the elderly
and pets from dehydration, sunburns and heat exhaustion while 
never leaving children or pets unattended in vehicles.

&&

.AVIATION...As of 10:35 PM PDT Friday...For 06z Tafs. VFR through
the forecast period. West to northwest winds will veer more to 
the north and decrease overnight. Winds on Saturday afternoon will
not be as strong as on Friday afternoon.

Vicinity of KSFO...VFR with mostly clear skies through the
forecast period. W-NW winds gradually diminishing overnight and
veering to the north. Winds will then shift back to the west on
Saturday afternoon and increase, but will not be as strong as
Friday afternoon.

SFO Bridge Approach...Similar to KSFO.

Monterey Bay Terminals...VFR. Light and variable winds, becoming
light to moderate westerly winds on Saturday afternoon.

&&

.MARINE...As of 9:09 PM PDT Friday...Northwest winds will remain 
strong and gusty through the weekend as strong high pressure 
remains offshore. Occasional gale force gusts are possible across 
the coastal waters. In addition to gusty winds, steep fresh swells
with relatively short periods will make seas hazardous this 
weekend.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
     .Tngt...SCA...Pt Arena to Pt Reyes 0-10 nm
             SCA...Pt Reyes to Pigeon Pt 0-10 nm
             SCA...Pigeon Pt to Pt Pinos 0-10 nm
             SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm
             SCA...Pt Arena to Pigeon Pt 10-60 nm
             SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm
             SCA...Mry Bay until 3 AM

&&

$$

PUBLIC FORECAST: CW
AVIATION: Dykema
MARINE: Dykema


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