Tuesday, March31, 2020
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Marine Weather and Tides
Daly City, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:53AMSunset 7:33PM Tuesday March 31, 2020 8:43 AM PDT (15:43 UTC) Moonrise 10:29AMMoonset 12:42AM Illumination 51% Phase: First Quarter Moon; Moon at 7 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 230 Am Pdt Tue Mar 31 2020
.small craft advisory in effect from this afternoon through late Wednesday night...
Today..NW winds 10 to 20 kt. Wind waves 1 to 2 ft, increasing to 3 to 4 ft this afternoon. NW swell 4 to 6 ft at 10 seconds.
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. NW swell 5 to 7 ft at 13 seconds.
Wed..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 6 to 7 ft. NW swell 4 to 6 ft at 12 seconds and sw around 2 ft at 19 seconds.
Wed night..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 6 to 7 ft. NW swell 4 to 6 ft at 12 seconds.
Thu..NW winds 10 to 20 kt with gusts up to 30 kt. Wind waves 5 to 6 ft. NW swell 3 to 5 ft at 11 seconds and sw around 2 ft at 18 seconds.
Thu night..NW winds 20 to 25 kt with gusts up to 35 kt. Wind waves 5 to 6 ft. Mixed swell nw 3 to 4 ft at 10 seconds and S around 2 ft at 16 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 4 to 5 ft. NW swell 3 to 4 ft and sw around 2 ft. A chance of showers.
Sat..W winds 5 to 10 kt. Wind waves 3 to 4 ft. Mixed swell nw 3 to 4 ft and S around 2 ft. A chance of showers.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 4 to 5 ft with a dominant period of 11 seconds. Across the bar...seas 5 to 7 ft with a dominant period of 11 seconds. Maximum ebb current of 2.6 kt at 09:19 am Tuesday and 0.7 kt at 11:43 pm Tuesday.
PZZ500 230 Am Pdt Tue Mar 31 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will increase this afternoon through Wednesday night as a low pressure system moves inland over the pacific northwest. The waters off the big sur coast will likely see some gale-force winds and/or gusts. Additionally, can't rule out some isolated gale-force gusts for the outer waters north of point pinos. Mixed swell will persist with a moderate northwest swell and a light southwesterly swell.


7 Day Forecast for Marine Location Near Daly City, CA
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location: 37.77, -122.54     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 311120 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 420 AM PDT Tue Mar 31 2020

SYNOPSIS. Dry weather conditions with seasonable temperatures are forecast for the remainder of the week. Rain chances and cooler temperatures return by the upcoming weekend and will potentially continue into early next week.

DISCUSSION. as of 02:58 AM PDT Tuesday . An upper level low off of the British Columbia coast and associated trough extending into the Pacific Northwest continues to produce widespread cloud cover and isolated showers over northern California. With this, cannot rule out so very light precipitation over far northern portions of the North Bay today, mainly across northern Sonoma County. Elsewhere, dry weather conditions are likely today under a partly to mostly sunny sky. Temperatures will generally warm into the upper 50s along the immediate cost while 60s are likely inland.

Dry weather conditions are likely to persist through the remainder of the week as the storm track stays to the north. Additionally, temperatures will remain near to slightly below seasonal averages in response to a broad trough over the much of the western portion of the country. Overnight/morning temperatures will coo slightly by midweek as a slightly drier air mass filters into the region. This may allow for some inland valley locations to drop into the middle 30s by early Thursday and Friday mornings.

Surface high pressure will build over the eastern Pacific resulting in gusty northwest winds over the Pacific and near the coast from late today through Wednesday evening. However, wind speeds inland will generally remain light.

Deterministic models and ensembles continue to indicate the return to unsettled weather conditions by late this week (generally late Friday) and into the upcoming weekend. However, there remain some differences in model-to-model solutions with respect to timing and position of the mid/upper level trough. Regardless, look for a cooling trend and increased precipitation chances region-wide as we head into the upcoming weekend. Conditions potentially remain unsettled heading into early next week as well.

AVIATION. as of 04:20 AM PDT Tuesday . Infrared satellite imagery shows low clouds developing and expanding in coverage this early morning over the San Francisco Bay Area. The major Bay Area terminals were all reporting MVFR ceilings as of the 12Z TAF publication time. Expect these clouds to mix-out around mid/late morning and return to VFR conditions. Light winds this morning will increase and become onshore in the afternoon.

Vicinity of KSFO . MVFR ceilings as a result of low clouds through 18-19Z, then transition back to VFR. Light winds this morning will become west to northwest this afternoon around 15 kt.

SFO Bridge Approach . Expect the low clouds to expand in coverage over the southern half of the San Francisco Bay along the approach over the next few hours through sunrise. Otherwise, expect similar conditions to that of the terminal.

Monterey Bay Terminals . MVFR conditions were observed earlier in the overnight hours associated with low clouds, but have since returned to VFR conditions. Could still see some low clouds develop between now and sunrise at MRY and SNS. Light winds this morning will become west to northwest this afternoon.

MARINE. as of 02:58 AM PDT Tuesday . Northwest winds will increase this afternoon through Wednesday night as a low pressure system moves inland over the Pacific Northwest. The waters off the Big Sur coast will likely see some gale-force winds and/or gusts. Additionally, can't rule out some isolated gale-force gusts for the outer waters north of Point Pinos. Mixed swell will persist with a moderate northwest swell and a light southwesterly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Arena to Pt Reyes 0-10 nm from 3 PM SCA . Pt Reyes to Pigeon Pt 0-10 nm from 3 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm from 3 PM SCA . Pt Arena to Pigeon Pt 10-60 nm from 3 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm from 3 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Mry Bay from 3 PM



PUBLIC FORECAST: RGass AVIATION: Rowe MARINE: Rowe

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 5 mi43 min 56°F4 ft
FTPC1 - 9414290 - San Francisco, CA 5 mi55 min 58°F
PXSC1 8 mi55 min 54°F 54°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi55 min W 4.1 G 5.1 53°F 1023.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 10 mi51 min Calm 52°F 1024 hPa (+0.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi61 min Calm G 1.9
OBXC1 11 mi55 min 54°F 52°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 11 mi55 min WNW 1 G 1.9 53°F 1024.2 hPa
AAMC1 - 9414750 - Alameda, CA 13 mi55 min SW 1.9 G 5.1 53°F 59°F1024.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 13 mi55 min SW 5.1 G 6 54°F 1024.5 hPa
RCMC1 - 9414863 - Richmond, CA 13 mi55 min SSW 2.9 G 5.1 53°F 57°F1023.9 hPa
LNDC1 14 mi55 min SW 2.9 G 5.1 53°F 1024.1 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi43 min WNW 7.8 G 9.7 52°F 56°F1025 hPa (+0.3)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 25 mi55 min SW 7 G 8.9 53°F 1023.8 hPa
RTYC1 - 9414523 - Redwood City, CA 25 mi55 min SSW 5.1 G 5.1 52°F 59°F1024.7 hPa
UPBC1 29 mi55 min W 7 G 8.9
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi55 min SSW 5.1 G 6 52°F 57°F1023.9 hPa
PCOC1 - 9415144 - Port Chicago, CA 33 mi55 min SW 7 G 9.9 52°F 57°F1023.5 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi33 min NW 7.8 G 9.7 52°F 56°F1025 hPa51°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi61 min WNW 8 G 11 53°F 1023.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 40 mi118 min W 6

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA14 mi47 minS 410.00 miOvercast53°F48°F86%1024.1 hPa
Oakland, Metro Oakland International Airport, CA18 mi50 minWSW 58.00 miOvercast56°F50°F81%1024.5 hPa
Half Moon Bay Airport, CA18 mi48 minN 010.00 miOvercast54°F50°F88%1024.4 hPa
San Carlos Airport, CA23 mi56 minS 410.00 miOvercast54°F50°F88%1024.7 hPa
Hayward, Hayward Air Terminal, CA24 mi49 minESE 310.00 miOvercast54°F48°F80%1024.9 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrSE4E4NE5NE6E6NE3W10W12W14W14W13W11W6SW4W4W3SW4SW3CalmNW3W5NW6CalmS4
1 day agoSE6SE5E5E7NE3NE3NW8CalmW11W9W9W9W9W10W9W8SW5W5W7SW3SW3CalmCalmSW3
2 days agoSE5SE4E7E7E8E7NE4S7SW8SW7SW6SW3SW4SE3S5SE5S6SE6SE5SE5SE5S4SE6S3

Tide / Current Tables for Ocean Beach, California
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Ocean Beach
Click for Map
Tue -- 01:42 AM PDT     Moonset
Tue -- 03:45 AM PDT     5.26 feet High Tide
Tue -- 06:55 AM PDT     Sunrise
Tue -- 10:54 AM PDT     0.48 feet Low Tide
Tue -- 11:29 AM PDT     Moonrise
Tue -- 06:41 PM PDT     3.99 feet High Tide
Tue -- 07:32 PM PDT     Sunset
Tue -- 11:01 PM PDT     3.48 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.84.34.85.25.34.94.23.12.11.20.60.50.71.21.82.63.23.73.943.93.73.53.5

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Tue -- 01:42 AM PDT     Moonset
Tue -- 02:16 AM PDT     0.54 knots Max Flood
Tue -- 05:07 AM PDT     -0.00 knots Slack
Tue -- 06:56 AM PDT     Sunrise
Tue -- 08:50 AM PDT     -1.35 knots Max Ebb
Tue -- 11:29 AM PDT     Moonrise
Tue -- 12:38 PM PDT     0.00 knots Slack
Tue -- 03:44 PM PDT     0.91 knots Max Flood
Tue -- 07:32 PM PDT     Sunset
Tue -- 07:47 PM PDT     -0.00 knots Slack
Tue -- 09:36 PM PDT     -0.53 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.40.50.50.30-0.3-0.8-1.2-1.3-1.1-0.7-0.30.20.60.90.90.80.60.3-0.1-0.5-0.5-0.3

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (11,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.