Tuesday, March31, 2020
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Marine Weather and Tides
El Granada, 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 6:54AMSunset 7:33PM Tuesday March 31, 2020 10:29 AM PDT (17:29 UTC) Moonrise 10:30AMMoonset 12:41AM Illumination 51% Phase: First Quarter Moon; Moon at 8 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- 843 Am Pdt Tue Mar 31 2020
.small craft advisory in effect from 3 pm pdt 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 843 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 El Granada, CA
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location: 37.5, -122.48     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 311628 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area Issued by National Weather Service Los Angeles/Oxnard CA 928 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 09:15 AM PDT Tuesday . A cloudy start to the day for the North Bay along with possibly a few light showers should give way to at least partly sunny conditions by the afternoon. Farther south plenty of sunshine and warmer temps than yesterday.

PREV 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 09:15 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: MW/RGass AVIATION: Rowe MARINE: Rowe

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi60 min W 1.9 G 6 53°F 59°F1025.1 hPa
46237 - San Francisco Bar, CA (142) 21 mi60 min 56°F3 ft
AAMC1 - 9414750 - Alameda, CA 21 mi60 min SSW 4.1 G 4.1 54°F 59°F1024.3 hPa
FTPC1 - 9414290 - San Francisco, CA 21 mi60 min WSW 5.1 G 7 59°F1024.5 hPa
PXSC1 21 mi60 min 55°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi60 min W 2.9 G 5.1 55°F 1023.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi60 min SSW 2.9 G 2.9
OBXC1 22 mi60 min 54°F 54°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 23 mi40 min NNW 9.7 G 12 53°F 56°F5 ft1025 hPa51°F
LNDC1 23 mi60 min WSW 1.9 G 4.1 54°F 1024.2 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi60 min W 2.9 G 5.1 53°F 1024.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi40 min WNW 5.8 G 9.7 53°F 56°F4 ft1025.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi50 min WSW 1 55°F 1024 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi60 min S 5.1 G 7 55°F 1024.5 hPa
RCMC1 - 9414863 - Richmond, CA 29 mi60 min S 2.9 G 5.1 55°F 57°F1023.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi60 min W 5.1 G 7 55°F 1023.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi60 min SSW 5.1 G 6 55°F 58°F1024 hPa
UPBC1 42 mi60 min WSW 6 G 8.9
PCOC1 - 9415144 - Port Chicago, CA 45 mi60 min SW 7 G 9.9 55°F 57°F1023.6 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi60 min WNW 7 G 9.9 55°F 1023.6 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA1 mi35 minNNW 810.00 miMostly Cloudy54°F50°F88%1024.4 hPa
San Francisco, San Francisco International Airport, CA10 mi34 minW 39.00 miMostly Cloudy55°F50°F83%1024.1 hPa
San Carlos Airport, CA12 mi1.7 hrsWNW 410.00 miOvercast54°F50°F88%1025.1 hPa
Palo Alto Airport, CA19 mi43 minNW 610.00 miMostly Cloudy55°F48°F77%1024.7 hPa
Oakland, Metro Oakland International Airport, CA20 mi37 minSW 410.00 miOvercast57°F50°F78%1024.6 hPa
Hayward, Hayward Air Terminal, CA22 mi36 minN 010.00 miOvercast55°F48°F80%1025.2 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrNE5NE6E6NE3W10W12W14W14W13W11W6SW4W4W3SW4SW3CalmNW3W5NW6CalmS4CalmW3
1 day agoE5E7NE3NE3NW8CalmW11W9W9W9W9W10W9W8SW5W5W7SW3SW3CalmCalmSW3SE4E4
2 days agoE7E7E8E7NE4S7SW8SW7SW6SW3SW4SE3S5SE5S6SE6SE5SE5SE5S4SE6S3SE6SE5

Tide / Current Tables for Princeton, Half Moon Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Tue -- 12:26 AM PDT     0.00 knots Slack
Tue -- 01:41 AM PDT     Moonset
Tue -- 03:28 AM PDT     0.67 knots Max Flood
Tue -- 06:14 AM PDT     -0.00 knots Slack
Tue -- 06:54 AM PDT     Sunrise
Tue -- 10:24 AM PDT     -1.35 knots Max Ebb
Tue -- 11:28 AM PDT     Moonrise
Tue -- 02:02 PM PDT     0.00 knots Slack
Tue -- 04:56 PM PDT     1.14 knots Max Flood
Tue -- 07:31 PM PDT     Sunset
Tue -- 08:54 PM PDT     -0.00 knots Slack
Tue -- 11:10 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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-0.10.10.40.60.60.40.1-0.3-0.6-1.1-1.3-1.3-0.9-0.5-00.611.110.80.5-0-0.4-0.5

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 (13,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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