FXUS66 KMTR 222347
AFDMTR
Area Forecast Discussion
National Weather Service San Francisco CA
447 PM PDT Mon Jun 22 2026
...New AVIATION...
.KEY MESSAGES...
Updated at 1215 AM PDT Mon Jun 22 2026
- Hazardous beach conditions along the Pacific Coast through
Wednesday
- Minor HeatRisk with below to near normal temperatures Monday
- Warming trend with pockets of moderate HeatRisk possible across
the Santa Clara Valley and East Bay Interior Valleys Tuesday
through Thursday, peaking Wednesday
&&
.SHORT TERM...
Issued at 303 PM PDT Mon Jun 22 2026
(This evening through Tuesday)
Status continues to erode for all, but the immediate coast and
through the Golden Gate. The west-northwest feed of stratus looks to
keep all but the Golden Gate stratus persistent through the
afternoon. Areas that started the day cloud-free are building into
the 70s and 80s, with temperatures there expected in the mid 80s to
low 90s. For the inland areas that started the day off with cloud
cover but cleared: temperatures will range from the 70s to 80s this
afternoon. Coastal areas that remain in the stratus look to stick to
the upper 50s and low 60s.
Cloud cover will build back inland slightly later this evening, but
will not reach as far inland due to the the marine layer compressing
into the night. Temperatures will remain cool overnight with most
areas staying in the mid 50s.
The reduction of marine influence from the compressed marine layer
will call for the inland areas to continue the warming trend on
Wednesday while the coast and near-coast areas remain cool. Inland
areas will build into the 80s while the far interior areas look to
peak in the mid to upper 90s.
&&
.LONG TERM...
Issued at 303 PM PDT Mon Jun 22 2026
(Tuesday night through next Sunday)
Wednesday looks to offer nearly identical temperatures to Tuesday,
with a few areas in the more inland portions of the region trending
a few degrees warmer. The pattern begins to change on Thursday after
another warm afternoon, leading into a breezy evening with better
onshore flow.
A trough deepens into the area at the end of the week, leading to a
resurgence of the marine layer and breezy to gusty winds. The
increased on shore flow will kick off a cooling trend on Friday,
with Saturday seeing the coolest high temperatures of the forecast
with mostly 60s and 70s.
&&
.AVIATION...
(00Z TAFS)
Issued at 447 PM PDT Mon Jun 22 2026
It's VFR except satellite and surface observations show stratus
/MVFR-IFR/ along the coastline and locally inland. Stratus /MVFR-
IFR/ moves inland tonight and Tuesday morning. Stratus mixes out
to the coastline with conditions improving to MVFR-VFR by late
Tuesday morning and afternoon. Coastal stratus redevelops Tuesday
night and Wednesday morning.
Vicinity of SFO...VFR then stratus /MVFR-IFR/ is forecast to
return to the terminal this evening. Stratus /MVFR-IFR/ prevails
tonight and Tuesday morning with mix out to VFR 18z Tuesday.
Stratus /MVFR/ returns mid Tuesday evening. West wind 15 to 25
knots, decreasing to near 10 knots tonight then increasing to 15
to 25 knots beginning 18z Tuesday, then easing to 12 knots mid
Tuesday evening.
SFO Bridge Approach...Similar to SFO.
Vicinity of SJC and OAK...For SJC Airport VFR for the evening,
then stratus /MVFR-IFR/ overnight then mixes out to VFR 17z
Tuesday. Northwest wind 10 to 20 knots, decreasing to light and
variable overnight and Tuesday morning then northwest near 10
knots Tuesday afternoon. For OAK Airport VFR until mid evening
stratus /MVFR-IFR/ arrives and prevails tonight and Tuesday
morning, mixing out to VFR 19z. West wind 5 to 15 knots.
Monterey Bay Terminals...Stratus /MVFR-IFR/ moves inland tonight
and Tuesday morning. Conditions improving to MVFR-VFR late Tuesday
morning and afternoon. Stratus /MVFR-IFR/ returns Tuesday evening
and night. Onshore winds 5 to 15 knots.
&&
.MARINE...
(Tonight through next Saturday)
Issued at 303 PM PDT Mon Jun 22 2026
Gentle to moderate winds will persist through the middle of the
week. Fresh to strong breezes resume over the northern waters
Wednesday and Thursday, expanding southwards towards the end of
the week. Seas remain moderate through Wednesday, with long period
southwest swell persisting through the extended forecast.
&&
.BEACHES...
Updated at 1215 AM PDT Mon Jun 22 2026
Long period southerly swell at around 14 to 16 seconds will
increase to 17 to 19 seconds by the middle of the week as
energetic storms in the Southern Hemisphere continue to affect the
California coast, especially for south and southwest facing
beaches. Hazardous beach conditions are advertised, specifically
for moderate to steeply sloped beaches along the Pacific Coast of
the North Bay, San Mateo, Santa Cruz counties. A Beach Hazards
Statement for Pacific Coast beaches continues through Wednesday
afternoon. Be sure to check beach conditions before you head out.
Sneaker waves will run up the beach much farther than other waves,
potentially catching beachgoers by surprise and resulting in
people being swept into the water. Rip currents are strong enough
to pull the strongest swimmers away from shore. Swim near a
lifeguard if possible. Stay back from the beach, and away from
jetties, piers, beachside rocks, and other infrastructure near the
water. Never turn your back to the ocean!
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
CA...Beach Hazards Statement through Wednesday afternoon for CAZ006-
505-509-529-530.
PZ...None.
&&
$$
SHORT TERM...Murdock
LONG TERM....Murdock
AVIATION...Canepa
MARINE...Manning
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Prepared by Boulder-Creek.com Weather at: Mon Jun 22 20:30:02 PDT 2026
From the National Weather Service
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