textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 1136 PM PDT Sun Apr 12 2026

- Slightly cooler to near normal temperatures through Thursday

- Periods of gusty winds, especially at higher elevations Wednesday through Friday

- Warmer temperatures return Friday into the weekend

SHORT TERM

Issued at 1136 PM PDT Sun Apr 12 2026 (Tonight through Tuesday)

The coverage in light shower activity continues to gradually shift south late tonight into early Monday morning. Earlier this evening the KOAK sounding reported a 23.0C temperature at H50 which is in the 10th percentile for this time of the year. That cold core aloft helped support continued light shower activity after sunset from the SF peninsula south to Monterey Bay. The upper low will become more unorganized as it moves farther inland, evolving into a positively tilted upper trough extending from the Great Basin southwest into SoCal today. Lingering offshore scattered light showers will occasionally drift into the Big Sur coastline through mid-morning today with maybe a trace to a few hundredths of rain. Mondays highs at lower elevations will run around 5F-10F degrees below normal, with higher elevations 10F-20F degrees below normal. Cooler than normal temperatures persist tonight into early Tuesday, especially farther inland with cooler than normal air aloft persisting much of the work week.

LONG TERM

Issued at 1136 PM PDT Sun Apr 12 2026 (Tuesday night through next Sunday)

A progressive shortwave pattern sets in Tuesday through Thursday behind the exiting trough defining the term 'gradual warming' with most locations seeing an increase of 1 or 2 degrees each day through the middle of the week. A developing trough shifts south from the Pacific Northwest on Wednesday. There is a slight chance for rainfall across the North Bay Wednesday afternoon as the trough axis pivots east and south, but any rainfall will be measured in hundredths of inches with no impacts. Gusty winds will develop on the backside of the exiting trough later Wednesday through Thursday and into the early morning hours of Friday. However, updated deterministic guidance has shifted the disturbance farther east than this time last night with less of an 'inside slider' signal. Winds will still be gusty at times especially at higher elevations but impacts seem low. There is also a signal for the potential of another round of rainfall toward the end of next weekend into the beginning of next week.

AVIATION

(18Z TAFS) Issued at 1052 AM PDT Mon Apr 13 2026

Fair weather CU will be the name of the game today with mostly VFR and an occasional MVFR cloud drifting over the terminals. VFR through early this evening. Lower confidence on CIGS tonight, but enough residual moisture and offshore clouds will bring MVFR cigs back late tonight and early Tuesday.

Vicinity of SFO...VFR. MVFR cigs return during the Tuesday AM rush around 13-15Z. VFR returns by Tuesday afternoon.

SFO Bridge Approach...Less clouds over the Bay today.

Monterey Bay Terminals...VFR and onshore flow. MVFR cigs return tonight.

MARINE

(Today through Saturday) Issued at 1052 AM PDT Mon Apr 13 2026

Rain showers linger through the morning before diminishing into the afternoon. Winds stay light through early afternoon, increasing to a moderate to fresh northwesterly breeze through Wednesday. Winds build again on Thursday leading to near gale force gusts into the end of the work week. Moderate seas continue through Wednesday before rough seas arrive on Thursday.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Wednesday for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.

Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Tuesday for Pt Reyes to Pigeon Pt 0-10 nm.

Small Craft Advisory from 3 PM this afternoon to 9 PM PDT this evening for Pt Pinos to Pt Piedras Blancas 0-10 nm.

Small Craft Advisory from 3 PM Tuesday to 3 AM PDT Wednesday for Pt Pinos to Pt Piedras Blancas 0-10 nm.