Marine Weather Net

Point Arena to Pigeon Point between 150 and 250 NM Offshore Forecast


TODAY

N
WINDS
10 - 20
KNOTS

TONIGHT

N
WINDS
10 - 15
KNOTS

SAT

N
WINDS
5 - 15
KNOTS

SAT NIGHT

NW
WINDS
5 - 10
KNOTS

The Marine Weather Forecast In Detail:
PZZ925 Forecast Issued: 224 AM PDT Fri Sep 24 2021

Today...N Winds 10 To 20 Kt. Seas 7 To 9 Ft.
Tonight...N Winds 10 To 15 Kt. Seas 6 To 8 Ft.
Sat...N Winds 5 To 15 Kt, Becoming Nw 5 To 10 Kt. Seas 6 To 7 Ft.
Sat Night...Nw Winds 5 To 10 Kt. Seas 6 To 7 Ft.
Sun...W Winds 5 To 10 Kt, Becoming Sw 5 To 15 Kt. Seas 6 To 7 Ft.
Sun Night...Sw Winds 5 To 15 Kt, Diminishing To Less Than 10 Kt. Seas 6 To 7 Ft.
Mon...W To Sw Winds 5 To 15 Kt. Seas 6 To 9 Ft.
Mon Night...N To Nw Winds 10 To 20 Kt. Seas 8 To 14 Ft.
Tue...N Winds 10 To 20 Kt, Becoming 10 To 15 Kt. Seas 12 To 14 Ft.
Tue Night...N Winds 15 To 25 Kt. Seas 10 To 12 Ft.
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804 AM PDT Mon Sep 27 2021
Synopsis for the Central California Coast and Bays Including the Monterey Bay, Greater Farallones and Cordell Bank National Marine Sanctuaries - PZZ500
Winds will briefly shift out of the south to southwest this morning as a weak cold front moves through the region. Northwest winds will then quickly return by this evening in the wake of the front. Locally stronger winds are expected along the Big Sur coast south of Point Sur. Winds will then gradually strengthen later on Tuesday. Mixed seas continue with a moderate period northwest swell and a longer period southerly swell. An additional larger northwest swell will arrive tonight with seas quickly building into Tuesday. The combination of stronger winds and building swell will result in hazardous seas conditions, particularly for smaller vessels. Seas will begin to subside on Wednesday.
Area Forecast Discussion
National Weather Service San Francisco Bay Area
922am PDT Monday September 27 2021

Synopsis
Light rain has already been measured along the coastal areas of North Bay and we expect additional light rain this afternoon as a weak front moves across the region. Breezy to locally gusty onshore winds during the front are expected today followed by a brief period of breezy to locally gusty offshore winds on Tuesday. Temperatures will be below seasonal averages through Tuesday. A gradual warming and drying trend is then expected for the latter half of the week with lighter winds.

As of 09:02am PDT Monday...Raindrops are falling on our heads! Or at least for some of us. Rain gauges along the SF Peninsula, Marin and Sonoma county coastlines have measured between 0.02-0.06" so far this morning along with some reports of drizzle with pre-frontal precipitation. There have even been 0.01-0.02" reported in the East Bay Hills and down to Fremont/Union City area. We expect additional light rain to fall this afternoon and tonight when the actual front tracks across our CWA. Models have been consistent on showing light rain amounts so no change in that trend. Looks like we could still see up to a tenth of an inch in higher elevations with less than a tenth of an inch at lower elevations. Hi-res models continue to show that spotty, light showers may drift as far south as Southern Monterey Bay.

Don't forget to secure any loose outdoor objects. As the front moves through this afternoon, onshore winds will get breezy in the valleys and along the coast with locally gusty conditions at higher elevations. Then on Tuesday, we'll have another round of breezy to locally conditions, but the winds will switch to more Northerly.

As of 02:55am PDT Monday...Low clouds have spread back inland across the region early this morning as the marine layer holds steady at around 2,000 feet in depth. However, we are seeing some mixing within the boundary layer ahead of an approaching frontal boundary that will push across the region later in the day. This has resulted in some breaks in the stratus over places such as the Monterey Bay and along the Big Sur Coast. Meanwhile, patchy coastal drizzle appears possible from the San Mateo coastline northward along the North Bay coast through this morning within the deep marine layer.

The core of the mid/upper level low off of the British Columbia coast is forecast to shift inland today and drive a cold front into the Pacific Northwest. The tail end of this system will push through the Bay Area later this afternoon with the potential for light rainfall to develop over the North Bay. Despite the modest plume of moisture forecast to advect inland, the best dynamics remain well to the north. Thus, only expecting a few hundredths of an inch of rainfall for areas north of the Golden Gate. To the south, the frontal passage will occur with little fanfare other than an increase in onshore winds. Breezy northwest winds are then anticipated on Tuesday in wake of the frontal passage. Also expecting afternoon temperatures to remain slight below seasonal averages through midweek.

As the aforementioned system shifts inland away from the region, expecting a brief period of north to northeast winds to develop in the region's higher elevations Tuesday night into Wednesday. Given the very dry fuels, this will likely result in elevated fire weather concerns. However, widespread critical conditions are not anticipated as the stronger winds will not coincide with the driest air likely to settle into the region Wednesday afternoon. A warming trend is then expected for the latter half of the week as high pressure builds over the eastern Pacific and into southern/central California.

Marine
as of 09:02am PDT Monday...Winds will briefly shift out of the south to southwest this morning as a weak cold front moves through the region. Northwest winds will then quickly return by this evening in the wake of the front. Locally stronger winds are expected along the Big Sur coast south of Point Sur. Winds will then gradually strengthen later on Tuesday. Mixed seas continue with a moderate period northwest swell and a longer period southerly swell. An additional larger northwest swell will arrive tonight with seas quickly building into Tuesday. The combination of stronger winds and building swell will result in hazardous seas conditions, particularly for smaller vessels. Seas will begin to subside on Wednesday.

NOAA San Francisco Bay Area Office: Watches - Warnings - Advisories
Today:
Small Craft Advisory...Point Pinos to Point Piedras Blancas 0-10 nm
Small Craft Advisory...Monterey Bay from 3pm