FXUS66 KMTR 270943
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
143 AM PST Fri Feb 27 2026

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

.KEY MESSAGES...
Updated at 142 AM PST Fri Feb 27 2026

- Well above normal temperatures through Saturday

- Brief, slight cooling trend Sunday and Monday

- Near to slightly above normal temperatures Tuesday through Thursday

&&

.SHORT TERM...
Issued at 142 AM PST Fri Feb 27 2026
(Today and tonight)

The 00Z sounding observed an 850 mb temperature of 13.00 degrees 
Celsius which is above the 90th percentile (12.8 degrees Celsius) 
for the date and time. Upper-level shortwave ridging will get pushed 
into the region today by an upper-level cutoff low on its heels. At 
the surface, high pressure across the Intermountain West and a 
coastal trough off the California Coast will generate light offshore 
flow. All of the above will be contributing factors to temperatures 
climbing to 15 degrees above normal. Today will be the warmest day 
of the week and the warmest day of the forecast period. To limit 
heat-realted impacts, people should increase water intake, reduce 
time spent outdoors or stay in the shade when the sun is the 
strongest, and open windows at night and use fans to bring cooler 
air inside buildings. To put this heat into context, SJC maximum 
temperature is forecast to be 78 degrees (previous record 79 degrees 
set in 1932, 1972, and 2020).

&&

.LONG TERM...
Issued at 142 AM PST Fri Feb 27 2026
(Saturday through Thursday)

Heights begin to fall Saturday as the upper-level cutoff low comes 
into the periphery. This will kickoff a brief, slight cooling trend; 
however, temperatures on Saturday will still be ten degrees above 
normal. Slight (15%) chances for precipitation remain Sunday into 
Monday with the passage of the upper-level shortwave trough - 
chances will be greater the farther north the location. Global 
ensemble clusters generally keep us dry with less than 0.10" for the 
wettest solutions. Even if it doesn't rain, an increase in cloud 
cover is expected with coastal drizzle possible. Conditions will be 
noticeably cooler with the return of near normal temperatures and 
onshore flow. Upper-level shortwave ridging will nose in from the 
Eastern Pacific Ocean on Tuesday before quickly getting shoved 
eastward by a following upper-level shortwave trough that will dig 
into the Great Basin. Sensible weather wise this will translate to 
near to slightly above normal temperatures for the end of the 
forecast period.

&&

.AVIATION...
(06Z TAFS)
Issued at 855 PM PST Thu Feb 26 2026

Widespread VFR lasts into the night with high clouds building once 
again. Light to moderate winds become lighter into the night with 
directions at most sites going variable. Pockets of inconsistent fog 
will be possible in some of the more interior sites into Friday 
morning but look to erode into the late morning, leading to 
widespread VFR. Winds build slightly into Friday afternoon but 
become weak again that evening and night.

Vicinity of SFO...Expect light to moderate northwest winds well into 
the night before winds become light and variable. As the winds 
weaken, some pockets of mist will affect visibilities. VFR returns 
in the late morning as moderate northwest winds return. Winds reduce 
again and become light and variable into the night.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...Winds become light and variable into the 
night with some slight reductions in visibilities possible, 
particularly in the Salinas Valley. Visibilities improve into Friday 
afternoon as light to moderate north to northeast winds build. These 
winds become light again into that evening.

&&

.MARINE...
(Tonight through next Wednesday)
Issued at 841 PM PST Thu Feb 26 2026

Mostly light to moderate winds are expected across the waters
through the weekend and into the next work week. Localized fresh
gusts will affect the southern waters on Friday but look to
dissipate into the weekend. Low to moderate seas continue into
next week. Drizzle to light rain will be possible across the
northernmost waters this weekend.

&&

.CLIMATE...
Issued at 1113 PM PST Thu Feb 26 2026

The following are the record high temperatures at the long term 
sites for Friday, Feb 27th and Saturday, Feb 28th.

Location         Feb 27th Record High       Feb 28th Record High 

Santa Rosa       90 in 1923                 93 in 1923
San Rafael       74 in 1954                 78 in 2025
Kentfield        79 in 1932, 1923           78 in 1929, 1923
Napa             80 in 1932                 81 in 1929
Richmond         78 in 2020                 77 in 1986
Livermore        79 in 1932                 82 in 2022
San Francisco    78 in 2002, 1992, 1986     76 in 1992, 1986
SFO Airport      76 in 2020                 73 in 1959
Redwood City     79 in 2025, 1932           77 in 2025
Half Moon Bay    78 in 1986                 74 in 1954
Oakland Museum   78 in 2002                 75 in 2025
San Jose         79 in 2020, 1992, 1932     77 in 2025, 1926
Salinas Airport  84 in 2025                 81 in 2022

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...None.
&&

$$

SHORT TERM...Sarment
LONG TERM....Sarment
AVIATION...Murdock
MARINE...Murdock

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Prepared by Boulder-Creek.com Weather at: Fri Feb 27 02:30:03 PST 2026