Millbrae, California 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

897
FXUS66 KMTR 120127
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
627 PM PDT Fri Apr 11 2025

...New AVIATION, MARINE...

.SYNOPSIS...
Issued at 105 PM PDT Fri Apr 11 2025

Gradual cooling tonight into tomorrow before more widespread
minor HeatRisk returns on Sunday into the beginning of next week.

&&

.SHORT TERM...
(This evening through Saturday)
Issued at 105 PM PDT Fri Apr 11 2025

The upper level trough continues to move through the Pacific
Northwest, which will continue to lower temperatures going into
Saturday. Tonight, temperatures will be noticeably colder with
temperatures in the mid to low 40s. Max temperatures for Saturday
will be 5-7 degrees lower compared to today, with inland areas
seeing low to mid 70s and coastal areas seeing mid 50s. Although
there will be a gradual cool down from the surface cold front,
temperatures will still remain slightly above seasonal temperatures.
HiRes models shows the amplified upper level flow dipping a bit
lower into our area tonight, which will help facilitate some strong
and gusty northwesterly winds over our coastal areas tonight into
Saturday evening. There is a chance for patchy fog and coastal
drizzle overnight, but chances are lower tonight compared to this
morning. With the chance for some occasional light offshore winds
inland, expect the shallow marine layer to remain confined to the
coast for the most part. There is a slightly higher chance for low
clouds/fog developing near Monterey Bay and the East Bay Hills, but
otherwise, conditions trend a bit clearer tonight. After the low
clouds clear in the morning, expect a beautiful clear sky Saturday
with the occasional high clouds funneling through the area.

&&

.LONG TERM...
(Saturday night through next Thursday)
Issued at 105 PM PDT Fri Apr 11 2025

Both the GFS and ECMWF, continues to show agreement with a weak
upper level ridging pattern building late Saturday night into
Sunday, allowing for a return of warmer temperatures and dry
weather. Max temperatures Sunday through Monday will be 5-15
degrees above average, with inland areas seeing upper 70s to low
80s and coastal areas in the 60s low 70s. There is minor HeatRisk
associated with this warm up for some of the inland areas for
those who are extremely sensitive to heat. Tuesday through
Thursday will remain warm and dry but temperatures will see a
gradual down-tick towards low to mid 70s inland as the ridge
continues to weaken and an upper level low develops off the coast
of CA.

Looking ahead..the trend for drier conditions and warmer
temperatures are expected to continue as Climate Prediction Center 6-
10 Day Outlook highlights our area with a 40-60% chance for above
normal temperatures and 33-40% chance for below normal
precipitation.

&&

.AVIATION...
(00Z TAFS)
Issued at 627 PM PDT Fri Apr 11 2025


Winds stay moderate to gusty before easing in the late evening and
early night. IFR CIGs build along the coast and the Monterey Bay in
the mid evening. Some scattered clouds will form in the more
interior areas, but do not look to form consistent CIGs. Cloud cover
erodes in the interior through the mid morning, but coastal and
Monterey Bay CIGs linger into the late morning and early afternoon.
Breezy west winds return for Saturday afternoon with some gustier
conditions for the SF Bay.

Vicinity of SFO...VFR through the TAF period. Expect the evening`s
gusty winds to reduce into the early night but still remain breezy.
Winds reduce further into the night, becoming moderate for early
Saturday. Gusty west winds arrive in the mid afternoon and look to
reduce again into early Saturday night.


SFO Bridge Approach...Similar to SFO

Monterey Bay Terminals...IFR CIGS build into the evening as winds
become light. Mist and drizzle look to affect the Monterey Bay into
the early morning, leading to some reductions in visibility. VFR
returns in the late morning and early afternoon and moderate west
winds build.



&&

.MARINE...
(Tonight through next Thursday)
Issued at 627 PM PDT Fri Apr 11 2025

Hazardous conditions persist over the coastal waters due to gusty
northerly winds. Winds will be strongest north of Point Reyes
over the outer waters. The stronger northerly winds will result
in steeper wind waves and fresh swell. Northwesterly swell will
build 10 to 12 feet at 10 to 11 seconds by Saturday morning.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory until 9 PM PDT this evening for Mry Bay-SF
     Bay N of Bay Bridge.

     Small Craft Advisory until 3 AM PDT Sunday for Pigeon Pt to Pt
     Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt
     Reyes 0-10 nm-Pt Pinos to Pt Piedras Blancas 0-10 nm-Pt
     Reyes to Pigeon Pt 0-10 nm.

     Gale Warning until 3 PM PDT Saturday for Pt Arena to Pt Reyes 10-
     60 NM.

&&

$$

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

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, X, and YouTube at:
www.facebook.com/nwsbayarea
x.com/nwsbayarea
www.youtube.com/nwsbayarea