209
FXUS66 KMTR 180823
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
123 AM PDT Tue Jun 18 2024

...New SYNOPSIS, SHORT TERM, LONG TERM...

.SYNOPSIS...
Issued at 123 AM PDT Tue Jun 18 2024

Breezy onshore winds and temperatures near seasonal averages
continue through Thursday, with another warming trend for the
weekend.

&&

.SHORT TERM...
(Today and tonight)
Issued at 123 AM PDT Tue Jun 18 2024

Winds are generally light this morning with the upper level trough
that drove the intense daytime winds progressing eastward across the
Intermountain West. Mid to high level clouds will flow over the
region today. Breezy onshore winds will develop this afternoon, but
they won`t be as intense as what we`ve seen this last weekend. Low
temperatures this morning will generally be in the low to mid 50s in
the lower elevations, to the upper 50s and around 60 in the higher
elevations. High temperatures today will range from the upper 50s to
mid 60s along the coast, to the mid to upper 70s along the Bayshore,
and the mid 80s to lower 90s in the inland valleys.

Smoke from the Point Fire in northwestern Sonoma County and the
Sites Fire in Colusa County is expected to travel towards the south
and southeast, impacting the Bay Area and Central Coast with haze
and moments of smoke. Although the Red Flag Warning for the North
Bay interior mountains was allowed to expire last night, elevated
fire danger remains across the interior regions. The air remains
very dry with daytime relative humidities in the 10-30 percent range
across the inland areas and the coastal ranges, with breezy onshore
winds gusting up to 20-30 miles per hour in the afternoon. Humidity
recoveries overnight are expected to progressively improve through
the week, but remain poor across the interior mountains and the
Santa Lucias.

&&

.LONG TERM...
(Wednesday through Monday)
Issued at 123 AM PDT Tue Jun 18 2024

A weak upper level trough develops over the state, continuing to
hover over the area for the next few days and promoting the
redevelopment of the marine layer and its associated stratus clouds.
Temperatures dip on Wednesday with highs in the upper 70s to mid 80s
in the inland valleys to the mid 50s to lower 60s along the coast,
before Thursday sees a few degrees of warming.

By Friday, the trough will erode as a ridge builds into the western
United States. The warmest temperatures are expected on Saturday,
where highs will range from the 90s to lower 100s for the inland
regions, the mid 70s to low 80s for the Bayshore, and the low to mid
60s for the coast.

&&

.AVIATION...
(06Z TAFS)
Issued at 1034 PM PDT Mon Jun 17 2024

VFR through the TAF period. Winds weaken into the late night
becoming light. Winds stay light into the late morning before
moderate to breezy winds arrive into Tuesday afternoon. Smoke from
fires to the north could cause some haze and smoke to filter into
the North Bay and around the SF Bay, but visibilities don`t look
to be greatly affected. Winds will reduce into Tuesday evening.

Vicinity of SFO...VFR through the TAF period. Winds reduce into
the night becoming light to moderate. Another round of breezy to gusty
winds starts building in the early afternoon with peak gusts
expected to be around 28 kts. These stronger gusts last into the
night. Gusts stop but moderate winds last into late Tuesday night.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR through the TAF period. Light to
moderate winds last through the late morning before more moderate
westerly winds arrive. Winds at the terminals reduce into Tuesday
night.

&&

.MARINE...
(Tonight through next Sunday)
Issued at 836 PM PDT Mon Jun 17 2024

Widespread strong northerly/northwesterly breezes with near gale-
force gusts will persist through Wednesday. Gusty winds will
diminish overall beginning Thursday with strong breezes remaining
exclusive to the outer waters through the weekend. Significant
wave heights will build to 9-11 feet today, abate through Friday,
and build back up to 10-12 feet towards the end of the the
weekend.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory from 3 PM this afternoon to 9 PM PDT this
     evening for SF Bay N of Bay Bridge.

     Small Craft Advisory from 9 AM to 3 PM PDT Wednesday for SF Bay
     N of Bay Bridge.

     Small Craft Advisory from 9 AM this morning to 9 PM PDT this
     evening for Mry Bay.

     Small Craft Advisory from 9 AM to 9 PM PDT Wednesday for Mry Bay.

     Small Craft Advisory until 9 PM PDT Wednesday for Pt Arena to Pt
     Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm.

     Small Craft Advisory until 9 AM PDT Wednesday for Pigeon Pt to
     Pt Pinos 10-60 NM-Pt Reyes to Pigeon Pt 0-10 nm.

     Small Craft Advisory until 3 AM PDT Wednesday for Pigeon Pt to
     Pt Pinos 0-10 nm.

     Small Craft Advisory until 9 AM PDT Wednesday for Pt Arena to Pt
     Reyes 10-60 NM.

     Small Craft Advisory from 9 PM Wednesday to 3 AM PDT Thursday
     for Pt Arena to Pt Reyes 10-60 NM.

&&

$$

SHORT TERM...DialH
LONG TERM....DialH
AVIATION...Murdock
MARINE...SO

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