Marine Weather Net

Pigeon Point to Point Piedras Blancas between 150 and 250 NM Offshore Forecast


TONIGHT

NW
WINDS
20 - 25
KNOTS

WED

NW
WINDS
15 - 25
KNOTS

WED NIGHT

NNW
WINDS
10 - 20
KNOTS

THU

N
WINDS
10 - 20
KNOTS

The Marine Weather Forecast In Detail:
PZZ930 Forecast Issued: 852 PM PDT Tue Apr 13 2021

Tonight...Nw Winds 20 To 25 Kt. Seas 9 To 11 Ft.
Wed...Nw Winds 15 To 25 Kt. Seas 9 To 11 Ft.
Wed Night...N To Nw Winds 10 To 20 Kt. Seas 7 To 9 Ft.
Thu...N Winds 10 To 20 Kt, Becoming 10 To 15 Kt. Seas 6 To 8 Ft.
Thu Night...N Winds 10 To 15 Kt. Seas 6 To 7 Ft.
Fri...N To Nw Winds 10 To 15 Kt. Seas 5 To 6 Ft.
Fri Night...Nw Winds 5 To 15 Kt. Seas 5 To 6 Ft.
Sat...Nw Winds 5 To 15 Kt, Increasing To 10 To 20 Kt. Seas 5 To 6 Ft.
Sat Night...Nw Winds 10 To 20 Kt. Seas 5 To 7 Ft.
Sun...Nw Winds 10 To 20 Kt, Becoming N. Seas 5 To 8 Ft.
Sun Night...N To Nw Winds 10 To 20 Kt. Seas 4 To 7 Ft.
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908 PM PDT Tue Apr 13 2021 .Synopsis for the Central California Coast and Bays Including the Monterey Bay...Greater Farallones...and Cordell Bank National Marine Sanctuaries... Buoy observations are showing diminishing winds over the northern coastal waters this evening. Moderate winds still exist in the northern outer waters tonight. Gale force gusts will persist in the northern outer waters, and will start to diminish early Wednesday morning. A moderate northwest swell is also moving through the waters and will be for the remainder of the week. Steep wind waves could be combined at times with the moderate swell to produce hazardous seas for small crafts in the northern outer waters. After winds diminish early Wednesday morning, weaker winds are forecasted for the remainder of the week.
Area Forecast Discussion
National Weather Service San Francisco Bay Area
952pm PDT Tuesday April 13 2021

Synopsis
Seasonable conditions and weaker winds are forecast for Wednesday with a gradual warming trend through late week. Temperatures warm to above seasonal averages for this upcoming weekend, peaking Sunday and possibly into Monday.

as of 09:51pm PDT Tuesday...It was a cool and breezy day across the area with some strong gusty winds on peaks and through passes. Notable max wind gusts include 52 mph on Mt Diablo, 48 mph at Byron Airport (downwind of East Bay Hills) and 47 mph at Altamont Raws (elevation 1436 ft). These elevated and terrain-driven winds were linked to a relatively strong northerly LLJ that set up off the northern CA coast. Low elevation areas along the coast and the Bay Shoreline had max gusts in the 20-30 mph range, so more like a typical breezy summer day. Most sites also experienced a good amount of cooling compared to yesterday, between 1 and 15 degrees at our climate sites. But in fact, elevated areas experienced the most cooling, as there was strong Cold Air Advection throughout the boundary layer. The biggest decline, Las Trampas RAWS (elevation 1760) reported a 21 degree drop from yesterday. This brought temp's 2-7 degrees below the daily normal for most sites. These will be the coldest temp's overall for the remainder of the week.

Cold Air Advection has disrupted the marine layer but patchy stratus is still developing around Monterey Bay, the SF Peninsula, East Bay, and southern Santa Clara County. Ensembles indicate stratus developing overnight from areas of SF Bay southward through the Central Coast. Skies should clear by mid-morning around SF Bay but late morning around Monterey Bay and the Central Coast. It will be another seasonably cool day, as the upper low remains anchored over the Great Basin, but winds will be less gusty. Temp's will warm a few degrees, meaning low to mid 60s near the coast and low 70s inland.

By Thursday, the upper low moves east as ridging tries to build from the west. This will allow for gradual warming each day through the end of the week. By Saturday, we may 70s at the coast and 80s inland. An upper ridge will dominate by Sunday, resulting in temp's well above normal, with 80s likely reaching the SF Bay Shoreline, and 90s in the warmest inland spots. Whether downtown SF and areas along the coast see 80s is questionable at this point, but as of now, less likely, with onshore breezes kicking in. Another question is whether the warm to hot temp's linger into Monday. GFS ensembles indicate some cooling on Monday but more drastic cooling on Tuesday, whereas ECMWF (European Centre for Medium-Range Weather Forecasts) ensembles suggest stronger cooling on Monday. Since this looks to be a relatively short heat event, potential impacts appear to be low at this time. Will be monitored as the week progresses.

Marine
as of 09:08pm PDT Tuesday...Buoy observations are showing diminishing winds over the northern coastal waters this evening. Moderate winds still exist in the northern outer waters tonight. Gale force gusts will persist in the northern outer waters, and will start to diminish early Wednesday morning. A moderate northwest swell is also moving through the waters and will be for the remainder of the week. Steep wind waves could be combined at times with the moderate swell to produce hazardous seas for small crafts in the northern outer waters. After winds diminish early Wednesday morning, weaker winds are forecasted for the remainder of the week.

.MTR WATCHES/WARNINGS/ADVISORIES... .Tngt...GLW...Pt Arena to Pigeon Pt 10-60 nm until 3 AM SCA...SF Bay until 9 PM SCA...Mry Bay until 9 PM SCA...Pt Arena to Pt Reyes 0-10 nm until 9 PM SCA...Pt Reyes to Pigeon Pt 0-10 nm until 9 PM SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm until 9 PM

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