, Issued at 109 PM PDT Sat Apr 11 2026 (This evening through Monday)
Rain showers and isolated thunderstorms remain in the forecast through early afternoon. Then, as a surface low approaches the northern California coast, a narrow cold-frontal rainband (NCFR) is forecast to approach the North Bay between 2 PM - 5 PM, 4 PM - 7 PM across the Bay Area, and 6 PM - 9 PM across the Central Coast. Along and ahead of the NCFR is when we have the greatest potential for damaging wind gusts exceeding 40 kt out over the ocean and bays. This will also be when we have the greatest potential for rotating cells that may produce waterspouts and/or weak tornadoes. Wind gusts are also expected to reach up to or exceed 50 mph along the coast and in the higher terrain during the aforementioned timeframes. Any stronger convection will be capable of producing stronger wind gusts. Again, much of our region remains under a Marginal Risk for sever weather today.
The aforementioned low pressure system is forecast push into northern California later tonight and become quasi-stationary through Sunday. Thus, scattered to numerous rain showers and isolated thunderstorms will prevail through Sunday and into early Monday morning as a colder/unsettled air mass moves into the region. This colder air mass will result in a low end potential for the region's highest peaks to see snowfall through Monday morning. However, little to no snow accumulations are forecast at this time.
..issued at 109 PM PDT Sat Apr 11 2026 (Monday night through next Friday)
The colder air mass will result in chilly temperatures across the interior both Monday and Tuesday mornings especially over the North Bay Valleys and interior Central Coast. Temperatures are currently forecast to be in the low-to-upper 30s in these areas with low 40s to near 50 degrees F elsewhere across the region. There is the potential for frost each morning across these interior regions, especially in the wind sheltered areas. Temperatures rebound to near seasonal averages by Thursday and Friday as ridging builds in from the eastern Pacific.
(00z TAFS) Issued at 434 PM PDT Sat Apr 11 2026
The forecast remains challenging for the TAF period with a frontal rain band currently coming into the region. Within the North Bay and San Mateo Peninsula, MVFR-IFR conditions are in place with steady rainfall through the band. Ahead of the rainband, across the interior East Bay and South Bays and the Central Coast, a mixed band of VFR to MVFR conditions prevails as isolated to scattered showers persist. Expect increasing southerly winds through the next few hours as the most intense rain approaches the region through 06Z, with IFR conditions and gusts to 30-40 kt expected. Behind the frontal rain band, gradual improvement is expected, although winds remain gusty and scattered showers continue through the end of the TAF period. Overall forecast confidence remains low to moderate.
Vicinity of SFO, Gusty southeast to south winds in addition to wet runways will make for challenging conditions at the terminal this evening into Sunday. Low-end VFR to MVFR conditions at present as the terminal sits in the frontal rain band. The most intense conditions are expected within the next couple of hours as the frontal rain band approaches, with gusts of 30-35 kt expected as it passes through. Will also need to monitor chances for lightning as well. Steady rain will transition to more scattered showers through the overnight hours into Sunday.
SFO Bridge Approach, Similar to SFO.
Monterey Bay Terminals, VFR-MVFR conditions through the next few hours with the approaching rain band coming into the region. Most intense rain is expected to arrive around 03-04Z, accompanied by MVFR-IFR conditions and the gustiest south to southwest winds of around 20-25 kt. Overnight, steady rain will transition to scattered showers through the end of the TAF period. Winds will generally be rather gusty from the southwest through the night, with some LLWS concerns at SNS as surface winds decouple from the flow aloft.
(tonight through next Thursday) Issued at 434 PM PDT Sat Apr 11 2026
Dangerous conditions will exist over the coastal waters through this evening as a potent line of storm moves through. Stronger developed storms will be capable of producing gusty winds, lightning, brief heavy rain, and a waterspout. Conditions will gradually improve overnight, but scattered showers and locally gusty winds remain through Sunday. High pressure builds behind the system with fresh northwest winds developing early next week, as seas abate to become moderate through mid week.
Ca, None. PZ, Small Craft Advisory until 3 PM PDT Sunday for Mry Bay-Pt Reyes to Pigeon Pt 0-10 nm-SF Bay N of Bay Bridge.
Small Craft Advisory until 9 PM PDT this evening for Pt Arena to Pt Reyes 0-10 nm-Pt Arena to Pt Reyes 10-60 NM.
Small Craft Advisory until 9 AM PDT Sunday for 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.
