FXUS66 KMTR 250001
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
459 PM PDT Fri Apr 24 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1217 PM PDT Fri Apr 24 2026

 - Additional rounds of drizzle/light rain likely tonight through
   Sunday

 - Below normal temperatures this weekend before a warming trend
   kicks off early next week

&&

.SHORT TERM...
Issued at 1217 PM PDT Fri Apr 24 2026
(This evening through Sunday)

A mix of low (mainly over the Pacific), mid, and high level 
clouds are seen via satellite imagery early this afternoon. 
However, where low clouds were slower to clear late this morning, 
we could see temperatures not reach their forecast maximum 
temperatures. This is especially so over the North Bay. We are 
still forecasting mid 60s to lower 70s across the interior with 
upper 50s to mid 60s in coastal areas this afternoon as low clouds
continue to dissipate. 

A cut-off mid/upper level low pressure is forecast to develop off
of the Bay Area and northern Central Coast tonight and gradually 
shift inland across the Central Coast on Sunday. This will likely 
result in drizzle and/or light rain across much of the Bay Area 
and northern Central Coast through the weekend. Rainfall amounts 
are forecast to be light, generally a few hundredths of an inch or
so through Sunday afternoon. The greatest potential to see 
greater than 0.10" will be across the Santa Cruz Mountains and the
Santa Lucia Range due to orographic lift along the coastal 
slopes. While rainfall amounts are forecast to be light, slick 
roadways are anticipated this weekend. 

In addition to the drizzle/light rain potential, cooler 
temperatures are also forecast for the weekend with afternoon 
highs up to 10 degrees below seasonal averages. On the flip side, 
increased cloud cover will result in overnight/morning lows up to 
a few degrees above normal.

&&

.LONG TERM...
Issued at 1217 PM PDT Fri Apr 24 2026
(Sunday night through next Thursday)

Drier conditions are expected for Monday through next weekend 
with a gradual warming trend through the period. However, general 
troughing across the region will limit any type of significant 
warm up with interior areas warming into the mid 70s by Thursday 
afternoon. Meanwhile, coastal areas will remain in the upper 50s 
to 60s. The 6- 10 Day Temperature Outlook from the CPC indicates 
the warming trend. 

&&

.AVIATION...
(00Z TAFS)
Issued at 459 PM PDT Fri Apr 24 2026

VFR-MVFR conditions continue tonight and Saturday. A few areas of
light drizzle are possible tonight and Saturday morning. A low 
pressure system nearby on Saturday will produce showers. Showers 
over the north Central Coast may become moderate to heavy Saturday
afternoon and evening.

Vicinity of SFO...VFR. A few showers are possible Saturday
afternoon and evening. West wind diminishing to 5 to 12 knots 
tonight through Saturday.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR-MVFR. Light coastal drizzle is possible 
tonight and Saturday morning. Showers also developing Saturday with 
a low pressure system nearby. Showers may become moderate to heavy 
in the afternoon and evening. There could be enough instability for 
isolated lightning later Saturday with low pressure development 
nearby, but for now will wait on including VCTS in the current 00z 
KMRY and KSNS TAFs.

&&

.MARINE...
(Tonight through next Wednesday)
Issued at 443 PM PDT Fri Apr 24 2026

Expect mainly moderate west to northwest breezes for the weekend.
Drizzle and light rain remain in the forecast, favoring the
southern waters and areas along the coast this weekend.

&&

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

$$

SHORT TERM...RGass
LONG TERM....RGass
AVIATION...Canepa
MARINE...Canepa

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Prepared by Boulder-Creek.com Weather at: Fri Apr 24 20:30:03 PDT 2026