FXUS66 KMTR 011108
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
408 AM PDT Wed Jul 1 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1146 PM PDT Tue Jun 30 2026

 - Seasonally cool temperatures and breezy afternoon winds will 
   continue through Thursday. 

 - Gradual warming trend late this week and into the weekend,
   bringing pleasant conditions for the holiday weekend.

&&

.SHORT TERM...
Issued at 1146 PM PDT Tue Jun 30 2026
(Tonight through Thursday)

Longwave trough over the western CONUS will remain in place through 
Wednesday, with weak bouts of energy passing through the flow at 500 
hPa. This pattern has been persistent over the last week, which has 
allowed the marine layer to be locked in place and kept temperatures 
below seasonal norms along the coast. As has been seen over the last 
few days, temperatures will continue to be in the upper 50s to 60s  
along coastal communities, with those inland in the 70s to mid 
80s. Marine layer will slowly erode along coastal areas from north
to south by midday, especially for areas north of the Monterey 
Bay Area. Although, communities located along Monterey Bay should 
largely remain locked under the marine layer through much, if not 
all, of the day. Some breaks in the clouds may allow the sun to 
break through briefly at times. We will also continue to see 
breezy conditions through the afternoon as weak bouts of energy 
continue to pass through the broad upper trough. 

&&

.LONG TERM...
Issued at 1146 PM PDT Tue Jun 30 2026
(Thursday night through next Tuesday)

We will continue to fall under the influence of the long wave trough 
on Thursday, bringing another day of cool and breezy conditions 
under the marine layer along the coast. Warmer temperatures and 
mostly clear skies will remain inland. 

Friday onward, we will start to see this long wave pattern break 
down over the area. We will also start to see some weak ridging 
develop going into the weekend. Thus, we will start to see a 
gradual warming trend through the weekend. Temperatures for 
communities along the coast will largely remain in the mid 60s to 
near 70, with more notable warming noted for inland areas. This 
will be especially true for inland areas south and east of the 
Monterey Bay Area where temperatures in the upper 80s to low 90s 
will be seen. As a result, HeatRisk along the coastal communities 
will remain low (green), while inland areas will be minor 
(yellow). As was mentioned in the last forecast package, guidance 
is hinting at the potential for another long wave trough to 
develop over the western CONUS. Although, CPC continues to 
highlight the area under favorability for above normal 
temperatures into the middle of next week, potentially bringing 
more summer-like weather to the area.

&&

.AVIATION...
(12Z TAFS)
Issued at 408 AM PDT Wed Jul 1 2026

Stratus /MVFR-IFR/ continues to develop while onshore winds also 
continue. Stratus mixes out by late morning and early afternoon 
otherwise VFR prevails today. Coastal stratus redevelops tonight 
and Thursday morning.

Vicinity of SFO...VFR. West wind 5 to 15 knots.

SFO Bridge Approach...Similar to SFO.

Vicinity of SJC and OAK...San Jose Airport VFR, southeast wind
holding near 13 knots through morning, diminishing to light and 
variable wind 21z today. Northwest wind 5 to 10 knots in the
afternoon and evening then shifting to southeast at 10 to 12 knots
tonight and Thursday morning. Oakland Airport stratus /MVFR/ mixing
out to VFR by late morning. Southwest to west wind 5 to 12 knots.

Monterey Bay Terminals...Stratus /MVFR-IFR/ mixes out to VFR by 
late morning and/or afternoon. Stratus /MVFR-IFR/ redevelops and 
moves inland tonight and Thursday morning. West to northwest winds
5 to 15 knots with afternoon gusts to 20 knots in the Salinas
Valley.

&&

.MARINE...
(Today through Monday)
Issued at 355 AM PDT Wed Jul 1 2026

A gale warning continues for the northern outer waters while
weaker, yet still gusty winds affect the rest of the waters.  Gale
force gusts across the northern outer waters will ease by late
week. Moderate northwest breezes will prevail elsewhere.  Rough to
very rough seas will continue in the outer waters today  and
tonight before abating to become moderate to rough Thursday  into
Friday.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory until 3 AM PDT Thursday for Pigeon Pt to Pt 
     Pinos 10-60 NM-Pt Arena to Pt Reyes 0-10 nm.

     Small Craft Advisory until 9 AM PDT this morning for Pt Reyes to 
     Pigeon Pt 0-10 nm.

     Gale Warning until 3 AM PDT Thursday for Pt Arena to Pt Reyes 10-
     60 NM.

&&

$$

SHORT TERM...Gunkel
LONG TERM....Gunkel
AVIATION...Canepa
MARINE...Canepa

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Prepared by Boulder-Creek.com Weather at: Wed Jul 1 08:30:03 PDT 2026