FXUS66 KMTR 221836
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
1136 AM PDT Wed Apr 22 2026

...New AVIATION, MARINE...

.KEY MESSAGES...
Updated at 1004 PM PDT Tue Apr 21 2026

 - Cool conditions Wednesday with lingering showers through the
   morning

 - Seasonal temperatures and dry conditions arrive Thursday

 - Monitoring potential rain and drizzle this weekend into the
   early part of next week

&&

.SHORT TERM...
Issued at 1004 PM PDT Tue Apr 21 2026
(Tonight through Thursday)

It was a pretty active day on Tuesday with quite a bit of lightning 
reported across the Bay Area and Central Coast, and a funnel cloud 
reported near Fremont. The chances for convection have basically 
shut down as with the lack of solar heating, and while lingering 
isolated showers are possible through the rest of the morning, not 
expecting convection to be an issue through Wednesday. Beyond the 
lingering showers, skies will be generally clearing Wednesday 
morning with mostly sunny conditions and a gentle onshore breeze 
developing by the afternoon hours. Low temperatures this morning 
range from the upper 30s to the middle 40s in the inland valleys, to 
the upper 40s and lower 50s near the coast and the Bays. High 
temperatures on Wednesday are close to the upper 50s to the middle 
60s in the lower elevations, with a slight warming gradient towards 
the inland valleys, and the upper 40s to middle 50s at the higher 
elevations. 

&&

.LONG TERM...
Issued at 1004 PM PDT Tue Apr 21 2026
(Thursday night through next Tuesday)

Temperatures will warm slightly for Thursday and Friday as a barely 
noticeable ridge sets up over the region, with highs in the lower 
elevations range from the lower 60s to lower 70s, close to or 
slightly below the seasonal averages. Into the weekend, another 
trough will come into the region and cause temperatures to dip 
again, introducing slight chances for light rain and drizzle that 
are expected to continue through the middle of next week. The latest 
CPC outlook leans towards precipitation totals above the seasonal 
averages heading into the first week of May, with the note that this 
late into the spring, the daily seasonal average rainfall at 
downtown San Francisco falls around two or three hundredths of an 
inch.

&&

.AVIATION...
(18Z TAFS)
Issued at 1136 AM PDT Wed Apr 22 2026


Vicinity of SFO...

SFO Bridge Approach...

Monterey Bay Terminals... 

&&

.MARINE...
(Today through Monday)
Issued at 1136 AM PDT Wed Apr 22 2026

Scattered light showers continue to drift to the southeast
through the southern waters this morning and will exit the region
this afternoon. A moderate northwest breeze will develop this
afternoon, then increase on Thursday to a fresh northwest breeze.
Wind and seas will begin to gradually subside on Friday,
continuing into the weekend.

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
CA...None.
PZ...Small Craft Advisory from 3 PM to 9 PM PDT Thursday for Pigeon 
     Pt to Pt Pinos 0-10 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.

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

     Small Craft Advisory from 3 PM Thursday to 3 AM PDT Friday for 
     Pigeon Pt to Pt Pinos 10-60 NM.

&&

$$

SHORT TERM...DialH
LONG TERM....DialH
AVIATION...KR
MARINE...KR

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Prepared by Boulder-Creek.com Weather at: Wed Apr 22 12:30:02 PDT 2026