textproduct: San Francisco Bay Area

KEY MESSAGES

Updated at 102 AM PDT Wed Apr 1 2026

- Cooler conditions continue through Thursday.

- Light rain today through early Thursday morning.

- A warming trend begins on Friday and continues into the weekend.

- Offshore flow returns Friday, with 40-50mph wind gusts expected for interior North Bay mountains.

SHORT TERM

Issued at 102 AM PDT Wed Apr 1 2026 (Today and tonight)

The next round of beneficial rain will move into the North Bay during the morning hours and will gradually spread south the Central Coast by the late afternoon and evening hours. Amounts have come up since the last forecast, with the North Bay mountains having the potential to see up to 0.25-0.75", up to 1.0" for the interior ranges, and around 0.10-.25" of rain for the valleys. The San Francisco Peninsula to Santa Cruz County is forecast to see around 0.1-.30" with up to 0.5" for the Santa Cruz Mountains. Interior East and South Bay valleys will be close to 0.05-0.15" of rain, while the Diablo Range and the Berkeley and San Leandro Hills may see up to 0.5". For interior Monterey and San Benito counties, amounts will be lower and in the 0.0-0.15" range while along the coast and into the Santa Lucias amounts from 0.10-0.30". If traveling today, be mindful that the roadways may be slick.

In addition to the rain, southwesterly winds will gradually pick up and become breezy with gusts up to 20-30 mph, up to 40 mph in areas of higher terrain. Winds are expected to become west-northwest winds expected by late Wednesday into early Thursday morning.

LONG TERM

Issued at 102 AM PDT Wed Apr 1 2026 (Thursday through Tuesday)

Conditions begin to dry up on Thursday, as cold front exits the region and the parent upper low moves into the Intermountain West. High pressure builds into the eastern Pacific which will bing drier into the region. The pressure gradient between these two system will tighten on Friday, bringing warming temperatures and gusty offshore winds. The strongest winds will be across the North Bay interior mountains and East and South Bay mountains with 40-50mph wind gusts expected for interior North Bay mountains. Warmer weather continues

AVIATION

(12Z TAFS) Issued at 503 AM PDT Wed Apr 1 2026

Lower confidence forecast given pre-frontal conditions through this afternoon - hit or miss showers - followed by a fropa tonight. A few VCSH early this morning around SF Bay then a brief break. Another pre-frontal wave will bring a few scattered showers and lower cigs this afternoon. Those fade with the sunset and the a fropa will bring more widespread precip initially N Bay 03-05Z then SF Bay 04-07Z and terminals south 08-10Z. Latest timing suggest some minor impacts to this AM/PM rush, but Thurs AM rush less likely.

Vicinity of SFO...MVFR VCSH lingering into the AM rush(around 14Z). VCSH return early this afternoon with -shra for evening rush. Steadier precip 04-08Z. Onshore winds ramp up after 20Z.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR through this evening. MVFR after 06Z with precip returning.

MARINE

(Today through Monday) Issued at 503 AM PDT Wed Apr 1 2026

A passing cold front today and tonight will bring unsettled weather and stronger winds. A fresh to moderate breeze will develop through the day north of Pigeon Point initially before spread south tonight. Strong northerly breezes will develop by Thursday afternoon and persist through Friday with moderate seas building to become rough with widespread hazardous conditions. Winds and seas ease Friday night and over the weekend.

MTR WATCHES/WARNINGS/ADVISORIES

CA...None. PZ...Small Craft Advisory from 3 PM this afternoon to 3 AM PDT Friday for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM-Pt Reyes to Pigeon Pt 0-10 nm-SF Bay N of Bay Bridge.

Small Craft Advisory from 3 AM Thursday to 3 AM PDT Friday for Mry Bay-Pigeon Pt to Pt Pinos 0-10 nm-Pigeon Pt to Pt Pinos 10-60 NM-Pt Pinos to Pt Piedras Blancas 0-10 nm.