Marine Weather Net

Point Arena to Point Reyes CA from 10 to 60 NM Marine Forecast


TODAY

N
WINDS
15 - 25
KNOTS

TONIGHT

N
WINDS
20 - 30
KNOTS

TUE

NE
WINDS
20 - 30
KNOTS

TUE NIGHT

NE
WINDS
5 - 15
KNOTS

The Marine Weather Forecast In Detail:
PZZ570 Forecast Issued: 821 AM PST Mon Jan 18 2021

SMALL CRAFT ADVISORY IN EFFECT THROUGH LATE TONIGHT ...GALE WARNING IN EFFECT FROM LATE TONIGHT THROUGH TUESDAY MORNING...
Today...N Winds 15 To 25 Kt With Gusts Up To 35 Kt. Wind Waves 9 To 11 Ft, Increasing To 11 To 13 Ft This Afternoon. W Swell 12 To 14 Ft At 18 Seconds.
Tonight...N Winds 20 To 30 Kt With Gusts Up To 45 Kt. Wind Waves 11 To 13 Ft. W Swell 8 To 10 Ft At 16 Seconds.
Tue...Ne Winds 20 To 30 Kt With Gusts Up To 45 Kt. Wind Waves 9 To 10 Ft. W Swell 5 To 7 Ft At 15 Seconds.
Tue Night...Ne Winds 5 To 15 Kt With Gusts Up To 25 Kt. Wind Waves 8 To 9 Ft. W Swell 4 To 5 Ft At 14 Seconds.
Wed...N Winds Up To 10 Kt. Wind Waves 8 To 9 Ft. W Swell 3 To 4 Ft At 15 Seconds.
Wed Night...Nw Winds 15 To 25 Kt With Gusts Up To 30 Kt. Wind Waves 8 To 9 Ft. W Swell Around 4 Ft At 15 Seconds.
Thu...Nw Winds 15 To 25 Kt With Gusts Up To 30 Kt. Wind Waves 9 To 10 Ft. Nw Swell 9 To 11 Ft.
Fri...N Winds 15 To 25 Kt With Gusts Up To 30 Kt. Wind Waves 8 To 9 Ft. Nw Swell 11 To 12 Ft.
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159 AM PST Mon Jan 18 2021
Synopsis for the Central California Coast and Bays Including the Monterey Bay, Greater Farallones and Cordell Bank National Marine Sanctuaries - PZZ500
Breezy north winds will prevail over the waters through Monday. The strongest winds are expected over the northern outer waters where occasional low end gale- force gusts will be possible. Locally breezy conditions will also be present along the Big Sur coast south of Point Sur. These winds will persist into tomorrow before a burst of offshore winds over land spills over into the waters starting late this evening through tonight. This will bring gale force conditions across the entire coastal waters and through portions of the San Francisco Bay into Tuesday resulting in widespread hazardous conditions. A large, very long period northwest swell will impact the waters through late tomorrow bringing additional hazards. The next long period northwest swell arrives mid-week.
Area Forecast Discussion
National Weather Service San Francisco Bay Area
407am PST Monday Jan 18 2021

Synopsis
Warm, dry weather will continue through Monday, along with gusty offshore winds in the hills of the San Francisco Bay Area. A strong, and much more widespread, offshore wind event is forecast from this evening through Tuesday morning. During this time, damaging winds are possible in the hills and locally in the valleys and near the coast. Winds will gradually diminish on Tuesday afternoon. A cooling trend is forecast from Wednesday through Friday and slight rain chances develop by the end of the week.

as of 02:45am PST Monday...A dry mid/upper level short-wave trough is currently dropping southward across the region with surface high pressure developing to the north and northeast. While there is an increase in high level clouds, surface conditions are beginning to dry out as offshore flow develops and strengthens in response to a tightening pressure gradient. Wind gusts of 40 to 60 mph are being reported in the higher elevations of the Bay Area with Mount Diablo seeing gusts in excess of 70 mph. Winds are forecast to increase region-wide today and become more widespread tonight into Tuesday resulting in strong, damaging winds in the region's higher elevations. While the the stronger winds look to be mostly confined to the higher elevations through the day today, stronger wind gusts may occasionally mix down to the lower elevations. This threat greatly increases late tonight into Tuesday morning as wind gusts increase to 60 to 80 mph in the peaks and ridges potentially mix down locally to the valleys and near the coast. All this said, a Wind Advisory is in effect for much of the Bay Area today and then expands to the Central Coast tonight. A High Wind Warning will go into effect this afternoon through Tuesday morning for the region's higher elevations. For additional details, please see NPWMTR for the latest wind products.

While conditions aloft begin to cool slightly in response to the mid/upper level trough, dry offshore flow will allow for unseasonably warm temperatures again this afternoon. Additionally, moderate to high fire weather concerns are expected over portions of our region through Tuesday in response to the strong offshore winds and low relative humidity. While precipitation totals so far this winter season remain well below normal, there has been enough rainfall across the San Francisco Bay Area
, particularly in the North Bay, to moisten fuels and limit the threat critical fire weather concerns. That said, fuels remain drier over the Central Coast, enough so to warrant a Fire Weather Watch for elevations above 1,000 feet across Monterey and San Benito Counties. To allow for the coordination with our fire partners later this morning, will hold off on upgrading this watch to a Red Flag Warning at this time. For additional details, please see the Fire Weather Discussion below.

Winds will begin to diminish region-wide during the day on Tuesday, yet remain locally strong and gusty into Tuesday night across the North and East Bay. Temperatures will also cool both during the daytime and overnight through the remainder of the week as a mid/upper level ridging noses into the Pacific Northwest and a cut- off low spins off of the southern California coast. Medium to longer range ensembles indicate the Pacific ridge will retrograde to the west late this week and into the upcoming weekend. This will allow for a series of mid/upper level trough to drop southward along the West Coast providing cooler and potentially unsettled weather conditions. Confidence in the details remain low at this time and will be fine tuned in the coming days, especially once short-term wind and fire weather concerns pass.

Safety remainders from a previous discussion...The offshore wind event continues to look strong and now is the time to act. In case of power outages: make sure cell phones/devices are fully charged, gather up flashligheights and extra batteries, and have a supply of non- perishable food/water. If there are widespread power outages, remember that it may take crews longer to get the power back on so make sure you have what you need in case you have to go a day or two without power. Other things to remember: secure loose outdoor objects, trim dead tree branches on your property, be cautious when driving as occasionally strong gusts may suddenly hit your vehicle, making it difficult to control.

.BEACHES...as of 09:45pm PST Sunday...A large, very long period northwest swell has arrived at the coast creating hazardous conditions through Monday afternoon. Large swell heigheights will lead to breaking waves of 18 to 22 feet, locally higher at favored breakpoints, along west to northwest facing beaches. As a result, a High Surf Advisory is in effect through Monday afternoon for west and northwest facing beaches while a Beach Hazard Statement has been issued for the northern Monterey Bay including Santa Cruz. With unseasonably warm temperatures this holiday weekend, it will likely attract more people to the coast. Individuals should be reminded that our coastline and the cold Pacific waters remain dangerous as these larger than normal waves impact the coast. Extreme caution is advised when visiting area beaches. Never turn your back to the ocean.

.CLIMATE...Record Type: Highs (Old Record Temp/Year)

Jan 18th

Santa Rosa 74/1976 Kentfield 70/2014 Napa 76/1920 Richmond 71/2018 Livermore 74/1919 San Francisco 70/1920 SFO 68/1948 Redwood City 74/2009 Half Moon Bay 72/2009 Oakland Downtown 73/2014 San Jose 74/1920 Gilroy 80/2014* Santa Cruz 83/1920 Salinas Airport 81/1994 King City 83/2009

*Monthly Records

Fire Weather
as of 02:45am PST Monday...While the Fire Season had officially been declared over and the calendar does say January, the active weather pattern is more typical of autumn and will bring moderate to high fire weather concerns to the region through Tuesday. Meteorologically it looks like a slam dunk, gusty offshore flow and low to moderate humidity. However, the wildcard are the fuels. The Bay Area has received below normal precipitation thus far this wet season. That being said, some early season rains did bring some moisture and allowed fuels moistures to increase. A "green up" is also being reported in most areas as well. That being said, Monterey and San Benito counties have received much less rainfall than areas to the north. Therefore, the drier conditions along the Central Coast increase the fire weather threat. After coordination with agency partners and other forecast offices decided to issue a Fire Weather Watch Monday evening through Tuesday afternoon. Conditions will be most severe Monday night through early sunrise Tuesday. Local models may be a tad aggressive but show RH values potentially dipping into the upper single digits to lower teens with winds 20 to 30 mph with gusts to around 45 mph over Monterey and San Benito. Coordination with agency partners will continue with the potential need to upgrade the current Fire Weather Watch into a Red Flag Warning later today. Stay tuned... Marine
as of 02:45am PST Monday...Breezy north winds will prevail over the waters through Monday. The strongest winds are expected over the northern outer waters where occasional low end gale- force gusts will be possible. Locally breezy conditions will also be present along the Big Sur coast south of Point Sur. These winds will persist into tomorrow before a burst of offshore winds over land spills over into the waters starting late this evening through tonight. This will bring gale force conditions across the entire coastal waters and through portions of the San Francisco Bay into Tuesday resulting in widespread hazardous conditions. A large, very long period northwest swell will impact the waters through late tomorrow bringing additional hazards. The next long period northwest swell arrives mid-week.

.MTR WATCHES/WARNINGS/ADVISORIES... .Tday...Wind Advisory...CAZ518-528-530 High Surf Advisory...CAZ006-505-509-530 High Wind Warning...CAZ507-511-512-517 Wind Advisory...CAZ507-511-512 Wind Advisory...CAZ006-505-506-508>510-513-529 SCA...Pt Arena to Pt Reyes 0-10 nm SCA...Pigeon Pt to Pt Pinos 0-10 nm SCA...Pt Pinos to Pt Piedras Blancas 0-10 nm SCA...Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA...Pt Arena to Pigeon Pt 10-60 nm SCA...SF Bay until 3 PM SCA...Pt Reyes to Pigeon Pt 0-10 nm until 3 PM GLW...SF Bay from 3 PM GLW...Pt Reyes to Pigeon Pt 0-10 nm from 3 PM SCA...Mry Bay from 9 AM

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