Thursday, March4, 2021
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Marine Weather and Tides
Stanford, CA

Version 3.4
NOTICE
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:33AMSunset 6:07PM Thursday March 4, 2021 4:09 PM PST (00:09 UTC) Moonrise 12:00AMMoonset 10:01AM Illumination 62% Phase: Waning Gibbous; Moon at 21 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ531 San Francisco Bay South Of The Bay Bridge- 228 Pm Pst Thu Mar 4 2021
Tonight..W winds up to 10 kt, becoming sw after midnight.
Fri..S winds up to 10 kt.
Fri night..S winds 10 to 20 kt with gusts up to 25 kt. Showers.
Sat..NW winds 5 to 10 kt. A slight chance of showers.
Sat night..NW winds up to 10 kt.
Sun..NW winds up to 10 kt.
Sun night..W winds 5 to 10 kt.
Mon..SW winds 5 to 15 kt. Rain likely.
Tue..S winds 5 to 15 kt. Rain.
PZZ500 228 Pm Pst Thu Mar 4 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds have developed ahead of a cold front and will increase overnight. Winds will be strongest north of point reyes. A long period northwest swell will impact the coastal waters through Friday. The passing cold front will bring rain later Friday into Saturday morning. Another low pressure system from the northwest will bring more rain early to mid next week.


7 Day Forecast for Marine Location Near Stanford, CA
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location: 37.45, -122.17     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 042154 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 154 PM PST Thu Mar 4 2021

SYNOPSIS. Seasonal temperatures and light southwest winds through Friday. Our next chance for rain moves over the area Friday night into early Saturday morning. Rain totals do not look impressive, as the system will move over the area too fast for much to accumulate. Temperatures will remain cool this weekend and onshore winds breezy Saturday, becoming light Sunday. More chances for rain remaining in the forecast for early to mid next week, keeping temperatures cooler than normal.

DISCUSSION. as of 2:00 PM PST Thursday . Satellite imagery shows clear skies aside from a few remnant stratus clouds along the coast of Point Reyes and Carmel early this afternoon. Fair weather conditions are occuring today with a marginally cooler and moister air mass in place versus 24 hours ago as a storm system descending from the Gulf of Alaska gradually approaches from the northwest. Tomorrow's weather is forecast to be similar to today's up through the early afternoon prior to the arrival of the next storm system. The main excitement in the office so far today has been coordination on the recent M8 earthquake in the Pacific Ocean-- at this time there are no active tsunami hazards in effect for our region, however, the NWS and state officials are watching this situation closely for any changes on this front and will notify if a coastal hazard becomes possible.

Models are in good agreement that the approaching system will bring bring a quick shot of precipitation to the region predominately by around sunset tomorrow (Friday) into early Saturday. Rain will taper off by around sunrise though some lingering light showers are possible through late Saturday morning. Precipitation totals will be predominately light with brief localized moderate rain rates (briefly up to 0.25/hr) possible with the frontal passage. The next storm system precipitation is expected to be beneficial with minimal impacts beyond slick roadways expected as amounts and rain rates are well below criteria for burn scar/slide/flash flooding concerns. Precipitation amounts will range from 0.25 to 0.50" for the immediate Bay Area and North Bay, up to 0.75" in the for the coastal ranges/hills, and less than 0.25" south of the Santa Cruz mountains. Southwest winds of 10-20mph with gusts to 25-30mph at the coast and higher terrain will accompany the arrival of this system weaker winds prevail elsewhere. Winds will become northwest in the wake of the front and become locally breezy along the coast by Saturday afternoon and relatively light elsewhere.

This weekend temperatures will have a hard time recovering as we see zonal flow aloft. Near the coast will see upper 50's and the inland areas lower 60's for high temperatures Saturday and Sunday. Northwest winds will remain breezy, with more gusty winds near the coast. Winds will look to calm down slightly Sunday.

By next week, ensemble members are in high agreement that wetter and cooler weather will impact the region from Monday through Wednesday as broad, slow moving 533dm 500mb low pressure system descends from the Gulf of Alaska then stalls in the vicinity. Latest data suggests this will bring an extended period of generally light to occasionally moderate precipitation throughout this timeframe, beginning roughly midday Monday and persist into Wednesday night, with the heaviest rain through the day on Tuesday for the majority in the urban areas of the Bay Area. Preliminary precipitation estimates of 2-3" in the coastal ranges and hills, 1.25" in the North Bay Valleys, 0.75-1.00" along the shorelines, and 0.50-.066" in the rain shadowed valleys. Breezy southerly winds will accompany this system. These precipitation amounts over the course of 2.5-3.0 days should not trigger any criteria for slides though localized ponding of water in poorly drained or low lying spots is definitely a possibility, especially later into the event. Cold air aloft will linger over the region by midweek and suppress daytime temperatures by 10-20 degrees into the upper mid to 50s for most areas, while pushing snow levels down as low as 2000-2500 feet and we could see some accumulations at the higher elevations given current data.

By late week next week in the wake of these wetter and cooler system, model uncertainty increases significantly, but there is some indication of a potential northerly/offshore wind event-- though given the anticipated rains, impacts will likely be low.

AVIATION. as of 09:30 AM PST Thursday . For the 18Z TAFs. Lingering cigs at KSTS will continue to thin out late this morning. VFR expected this afternoon and this evening at all terminals. Tonight on the other hand is tricky and lower confidence forecast. Hi-res model guidance suggests a return of some patchy low cigs in the MVFR cat. For now brought some cigs back for the North Bay and Monterey Bay. SF Bay could see some clouds, but will keep them SCT. Tomorrow afternoon into the evening more widespread cloud cover will return as a cold front moves in from the west. Vicinity of KSFO . VFR. Wind light and variable until 22z today then southwest 10 to 20 knots, wind decreasing to south-southwest 10 knots tonight and Friday morning. Scattered clouds possible tomorrow morning with increase mid-high level clouds in the afternoon/evening. SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR through early tonight. MVFR cigs late tonight and early tomorrow. Confidence on returning cigs is medium.

BEACHES. as of 4:19 AM PST Thursday . A long period northwest swell arrives today through Friday bringing an increased risk of sneaker waves, rip currents, long shore currents, and there could be hard breaking surf on steep beaches. There is the potential that these conditions will transition into high surf on Friday. The hazard is for west and northwest facing beaches where caution is advised. Never turn your back to the ocean.

MARINE. as of 09:27 AM PST Thursday . A cold front will approach the region today resulting in increasing southerly winds over the coastal waters. Winds will be strongest north of Point Reyes. A long period northwest swell arrives today continue into Friday. The passing cold front will bring rain later Friday into Saturday morning. Another low pressure system from the northwest will bring more rain early to mid next week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm



PUBLIC FORECAST: DRP AVIATION: MM MARINE: MM

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 5 mi69 min WNW 8.9 G 12 58°F 59°F1024.3 hPa (-1.0)
AAMC1 - 9414750 - Alameda, CA 23 mi69 min W 5.1 G 8 56°F 56°F1024.3 hPa (-0.6)
LNDC1 25 mi69 min NNW 6 G 8.9 56°F 1024 hPa (-0.7)
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi69 min NW 8.9 G 11 53°F 1024.1 hPa (-0.7)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 26 mi69 min WNW 6 G 8
OBXC1 26 mi69 min 55°F 47°F
PXSC1 27 mi69 min 56°F 47°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 27 mi69 min W 7 G 13 55°F 1023.1 hPa (-0.7)
FTPC1 - 9414290 - San Francisco, CA 29 mi69 min WSW 7 G 15 53°F 54°F1024.1 hPa (-0.8)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 33 mi69 min SW 13 G 16 55°F 1024.4 hPa (-0.7)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 34 mi58 min W 8.9 55°F 1024 hPa
46237 - San Francisco Bar, CA (142) 34 mi39 min 53°F4 ft
RCMC1 - 9414863 - Richmond, CA 35 mi69 min S 5.1 G 8.9 55°F 55°F1024.2 hPa (-0.6)
46269 36 mi39 min 53°F 54°F3 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 38 mi39 min S 9.7 G 12 51°F 1024.7 hPa46°F
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi69 min WNW 11 G 13 58°F 56°F1023.5 hPa (-0.9)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 41 mi39 min SSE 7.8 G 9.7 51°F1024.7 hPa
UPBC1 41 mi69 min WNW 8.9 G 12
PCOC1 - 9415144 - Port Chicago, CA 42 mi69 min W 9.9 G 12 58°F 56°F1023.3 hPa (-0.8)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 42 mi69 min W 6 G 9.9 57°F 1023.5 hPa (-0.8)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi69 min NW 5.1 G 7 62°F 1023.2 hPa (-1.0)
CQUC1 43 mi50 min 55°F
46042 - MONTEREY - 27NM West of Monterey Bay, CA 48 mi39 min S 5.8 G 7.8 53°F 53°F1024.7 hPa48°F
MLSC1 - Moss Landing, South Harbor, CA 49 mi39 min 52°F
ELXC1 - Elkhorn Slough Reserve, CA 49 mi84 min NNW 7 57°F 1024 hPa47°F
46092 - MBM1 49 mi72 min W 3.9 54°F 53°F1024 hPa (-0.7)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA3 mi22 minNNW 1210.00 miClear61°F46°F59%1023.7 hPa
San Carlos Airport, CA7 mi14 minNW 710.00 miClear63°F45°F52%1024 hPa
Mountain View, Moffett Field, CA7 mi19 minNNW 8 G 149.00 miFair61°F46°F59%1023.4 hPa
San Jose, San Jose International Airport, CA14 mi16 minNNW 1210.00 miA Few Clouds64°F43°F46%1023 hPa
Hayward, Hayward Air Terminal, CA15 mi15 minWNW 910.00 miFair61°F44°F54%1024.6 hPa
San Francisco, San Francisco International Airport, CA15 mi13 minSW 910.00 miA Few Clouds62°F40°F44%1023.7 hPa
Oakland, Metro Oakland International Airport, CA17 mi16 minWNW 1010.00 miA Few Clouds62°F46°F56%1023.9 hPa
Half Moon Bay Airport, CA18 mi14 minno data5.00 miFair with Haze54°F46°F77%1024.7 hPa
San Jose / Reid / Hillv, CA20 mi22 minWNW 1410.00 miClear66°F45°F46%1022.7 hPa

Link to 5 minute data for KPAO

Wind History from PAO (wind in knots)
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SW14SW10SW74------------------CalmCalmCalmN4N6N8N8N8NW10N12
1 day ago--N5N6NW4NW4------------------W3CalmCalmSE53NE5NE5--N9N5
2 days ago------N9N5------------------3Calm334N5N8N10N11NW12

Tide / Current Tables for Palo Alto Yacht Harbor, California
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Palo Alto Yacht Harbor
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Thu -- 04:29 AM PST     8.52 feet High Tide
Thu -- 06:34 AM PST     Sunrise
Thu -- 10:00 AM PST     Moonset
Thu -- 11:44 AM PST     0.53 feet Low Tide
Thu -- 05:16 PM PST     6.59 feet High Tide
Thu -- 06:05 PM PST     Sunset
Thu -- 11:53 PM PST     2.68 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.53.75.57.38.48.47.45.84.22.71.50.70.61.22.64.45.96.66.45.74.84.13.42.9

Tide / Current Tables for Dumbarton Hwy Bridge, South San Francisco Bay, California Current
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Dumbarton Hwy Bridge
Click for Map
Thu -- 01:43 AM PST     1.36 knots Max Flood
Thu -- 04:31 AM PST     -0.00 knots Slack
Thu -- 06:34 AM PST     Sunrise
Thu -- 08:12 AM PST     -1.26 knots Max Ebb
Thu -- 10:00 AM PST     Moonset
Thu -- 11:39 AM PST     0.00 knots Slack
Thu -- 02:46 PM PST     1.47 knots Max Flood
Thu -- 06:02 PM PST     -0.00 knots Slack
Thu -- 06:05 PM PST     Sunset
Thu -- 08:45 PM PST     -0.65 knots Max Ebb
Thu -- 11:29 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.81.31.310.4-0.2-0.7-1.1-1.3-1.1-0.8-0.30.20.91.41.51.20.70-0.3-0.6-0.6-0.4-0.2

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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