textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 320 PM PDT Mon Jun 8 2026

- Chance for coastal drizzle this evening into early Tuesday

- Warmer and dry weather expected Wednesday - Saturday

- Moderate risk of heat-related illnesses for interior locations on Wednesday and Thursday

- Elevated fire weather concerns for the interior North Bay and the East Bay and Santa Clara Hills late Wednesday and Thursday

UPDATE

Issued at 824 PM PDT Mon Jun 8 2026

The band of showers that currently extends from the Santa Cruz Mountains over to the East Bay has been overperforming so far this evening, with public reports of drizzle across the Bay Area, centered mainly on favored locations in the foothills. As a result, have added a chance for drizzle along the coastal and higher elevation locations across the Bay Area into Santa Cruz County through the night, but note that accumulations are still very light with rain totals generally a few hundredths of an inch outside the move favored locations.

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SHORT TERM

Issued at 320 PM PDT Mon Jun 8 2026 (This evening through Tuesday)

A disturbance will continue to track through the PacNW through tomorrow morning. So far, this has spread high clouds across the region with radar showing light returns over the North Bay. Looking at sounding data, profiles have moistened some, but favor a drier air mass. As the system progresses and a front approaches, we could see this interact with the marine layer later this evening and into Tuesday morning. This would result in coastal drizzle and perhaps even some light rain/coastal drizzle for the northwestern portion of Sonoma County. The front is expected to pass across the region Tuesday morning, with drier air working in behind it. Skies will begin will clear behind the front, which will kick off the warming trend for the week. Highs for Tuesday will be in the mid 70s to mid 80s for interior valley locations and for the interior mountains. Along the coast, temperatures will range from the upper 50s to low 70s.

AVIATION

(18Z TAFS) Issued at 1155 AM PDT Mon Jun 8 2026

VFR through the afternoon as high level clouds begin to move across the region as the low pressure system to our northwest moves onshore. MVFR ceilings begin to fill in at terminals beginning as early as 5pm PDT today and will be widespread by sunset. Moderate westerly winds (10+ kts) prevail through the afternoon and early evening with embedded gusts in excess of 20kts. Medium to high confidence that most terminals will develop IFR ceilings overnight, except for LVK and SJC where it will remain MVFR through Tuesday morning. Winds ease overnight and may become variable at times at some sites, but will predominantly come from the west unless otherwise stated in TAF. North Bay and coastal terminals have a 20- 30% chance of experiencing some drizzle (up to 0.01 inches) this evening through the overnight hours from the approaching upper-level trough, though confidence is currently too low to include in the TAF.

Vicinity of SFO...VFR and strong gusts prevail through the day into the evening. MVFR ceilings will settle over the Bay around 5pm as westerly winds begin to ease. Ceilings will become borderline IFR- MVFR around sunset time and eventually get pushed to IFR through the overnight hours. Conditions improve back to VFR by late Tuesday morning due to mixing. High confidence in forecast.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR through the afternoon as westerly winds increase to moderate breezes (10-15kts). Winds diminish slightly early evening (~5pm PDT) with developing MVFR ceilings that eventually become IFR through the overnight hours. Expecting conditions to transition back to VFR by Tuesday morning.

AVIATION

(18Z TAFS) Issued at 1155 AM PDT Mon Jun 8 2026

VFR through the afternoon as high level clouds begin to move across the region as the low pressure system to our northwest moves onshore. MVFR ceilings begin to fill in at terminals beginning as early as 5pm PDT today and will be widespread by sunset. Moderate westerly winds (10+ kts) prevail through the afternoon and early evening with embedded gusts in excess of 20kts. Medium to high confidence that most terminals will develop IFR ceilings overnight, except for LVK and SJC where it will remain MVFR through Tuesday morning. Winds ease overnight and may become variable at times at some sites, but will predominantly come from the west unless otherwise stated in TAF. North Bay and coastal terminals have a 20- 30% chance of experiencing some drizzle (up to 0.01 inches) this evening through the overnight hours from the approaching upper-level trough, though confidence is currently too low to include in the TAF.

Vicinity of SFO...VFR and strong gusts prevail through the day into the evening. MVFR ceilings will settle over the Bay around 5pm as westerly winds begin to ease. Ceilings will become borderline IFR- MVFR around sunset time and eventually get pushed to IFR through the overnight hours. Conditions improve back to VFR by late Tuesday morning due to mixing. High confidence in forecast.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR through the afternoon as westerly winds increase to moderate breezes (10-15kts). Winds diminish slightly early evening (~5pm PDT) with developing MVFR ceilings that eventually become IFR through the overnight hours. Expecting conditions to transition back to VFR by Tuesday morning.

MARINE

(Tonight through next Saturday) Issued at 320 PM PDT Mon Jun 8 2026

Gale force winds continue to affect the inner waters sound of point sure, with the southern outer waters still seeing gusty winds while the rest of the area is seeing winds and seas ease. Expect winds to ease across the waters overnight, but northwesterly wind and seas will begin to build again Tuesday morning, Hazardous conditions for small craft develop by mid- morning across the coastal waters. Gale force wind gusts are possible by early Wednesday morning over the outer waters. Winds and seas begin to ease again into Thursday, and stay light through the weekend.

FIRE WEATHER

Issued at 545 PM PDT Mon Jun 8 2026

Hot temperatures, gusty north winds, and low humidities across the North Bay interior mountains will raise the fire weather threats late on Wednesday into Thursday, with a particular emphasis on the interior mountains of Napa County. Although the strongest winds will remain within the Sacramento Valley, gusts of 25 to 35 mph are expected to spread into Napa County, with stronger gusts of 40-50 mph possible along the Vaca Mountains along the county's eastern edge. Meanwhile, daytime humidity retention will be very poor with relative humidity values as low as 10-15%, while overnight recoveries are likewise poor as RH values top out at 20-30%. Thus, fuels are expected to dry rapidly, leading to the elevated fire weather concerns. It's a little too early to put out fire weather products at this stage, but this will be re-evaluated today and Tuesday as the dry conditions approach. Elsewhere across the district, conditions remain hot and dry, but we're not expecting winds to be as strong as they are across the interior North Bay.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...Small Craft Advisory from 9 AM to 9 PM PDT Tuesday for Mry Bay.

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

Small Craft Advisory from 9 AM Tuesday to 3 AM PDT Wednesday for Pt Arena to Pt Reyes 10-60 NM.

Gale Warning from 3 AM to 9 PM PDT Wednesday for Pt Arena to Pt Reyes 10-60 NM.