Tuesday, January28, 2020
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Marine Weather and Tides
San Mateo, 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 7:14AMSunset 5:29PM Tuesday January 28, 2020 8:21 AM PST (16:21 UTC) Moonrise 9:40AMMoonset 9:15PM Illumination 13% Phase: Waxing Crescent; Moon at 4 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 257 Am Pst Tue Jan 28 2020
Today..SW winds 5 to 15 kt. A chance of rain.
Tonight..NW winds 5 to 15 kt.
Wed..NW winds up to 10 kt.
Wed night..W winds 5 to 15 kt.
Thu..W winds up to 10 kt.
Thu night..W winds up to 10 kt.
Fri..N winds around 5 kt.
Sat..N winds around 5 kt.
PZZ500 257 Am Pst Tue Jan 28 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak cool front moving across the coastal waters this morning will give way to increasing winds from the north and building short period seas. Conditions will remain elevated through the work week. A long period northwest swell will arrive later this week.


7 Day Forecast for Marine Location Near San Mateo, CA
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location: 37.59, -122.31     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 281228 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 428 AM PST Tue Jan 28 2020

SYNOPSIS. Light rain will be possible over the North Bay and as far south as San Francisco through early afternoon. Dry conditions are then forecast region-wide through the remainder of the week along with a gradual warming trend. Cooling is then forecast by Sunday and into early next week.

DISCUSSION. as of 02:58 AM PST Tuesday . A mid/upper level system approaching the Pacific Northwest has pushed a frontal boundary into Northern California early this morning. Ahead of the boundary, high level clouds continue to advect inland while low level moisture in the boundary layer has also resulted in low clouds over much of the region. This cloud cover has kept temperatures generally in the upper 40s to lower 50s so far this morning.

Light rain associated with the front is being detected by regional radar over Northern California and as far south as Mendocino County. This will continue to advance inland and southward through the morning with light precipitation likely to develop over the North Bay around sunrise and then continue through mid-morning. Light rain may push as far south as San Francisco and the San Mateo coastline before dissipating by early afternoon. Thus, most areas to the south of the aforementioned areas will remain dry today. Areas that do receive rainfall will generally see amounts of one-tenth of an inch or less.

A warming trend will occur through the remainder of the week as high pressure over the eastern Pacific builds inland. With 850 mb temperatures forecast to approach 15 deg C by Friday and Saturday, look for daytime temperatures to be 5 to 10 degrees above seasonal averages. Widespread middle/upper 60s are likely with lower 70s across the interior. Cannot even rule out maximum temperatures reaching into the middle 70s by Sunday afternoon under mainly clear sky conditions.

Temperatures cool region-wide by Sunday and into early next week as the ridge is replaced by a broad mid/upper level trough. However, precipitation will likely remain to the north and east of the region. Longer range outlooks maintain dry weather conditions over much of the region through early February.

AVIATION. as of 4:28 AM PST Tuesday . For 12Z TAFs . A weak frontal boundary will move over the Bay Area and Monterey Bay regions through the day today. This will bring some light rain to many of the terminals in the Bay Area proper and maybe some brief light rain in Monterey. Winds around the front are not forecast to be of any significance either. Behind the front, when the winds shift to come out of the northwest, there may be a brief period when the winds pick up to 10 knots or so, but otherwise they are forecast to remain weak. Tonight into Wednesday morning will be the difficult part. High pressure building across the area in the wake of the front will help to trap some of the low level moisture in the area which could yield some low cigs and vsby issues at some terminals tonight. The TAFs continue to hint at this possibility with STS being the near sure bet of low cigs and vsby tonight.

Vicinity of KSFO . MVFR is starting the morning at SFO and is expected to continue through much of the day as a weak frontal boundary limps through the area. In the wake of the front, residual moisture and building high pressure may cause overnight lowering cigs and vsby. Something that will need to be watched for development. Think of summer type conditions.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Some passing low cigs in the area this morning are forecast to mix out as a weakening frontal boundary approaches. As the front limps over the area more low cigs are likely. High pressure will build in the wake of the dissipating front, which will cause possible reduction in vsby at Monterey terminal tonight. This will need watching.

MARINE. as of 04:11 AM PST Tuesday . A weak cool front moving across the coastal waters this morning will give way to increasing winds from the north and building short period seas. Conditions will remain elevated through the work week. A Long period northwest swell will arrive later this week.

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



PUBLIC FORECAST: RGass AVIATION: BFG/Canepa MARINE: BFG

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 8 mi51 min 51°F 56°F1028 hPa
AAMC1 - 9414750 - Alameda, CA 13 mi51 min 54°F
LNDC1 14 mi51 min 53°F 1027.6 hPa
PXSC1 15 mi51 min 54°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi51 min 53°F 1027.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi51 min 53°F 1026.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi69 min SSE 8 G 9.9
OBXC1 15 mi51 min 53°F 53°F
FTPC1 - 9414290 - San Francisco, CA 17 mi57 min 54°F 54°F1027.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 22 mi51 min 54°F 1027.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 22 mi34 min SSE 4.1 52°F 1028 hPa
46237 - San Francisco Bar, CA (142) 22 mi51 min 53°F7 ft
RCMC1 - 9414863 - Richmond, CA 24 mi51 min 54°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi31 min S 9.7 G 14 54°F 54°F9 ft1028.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi51 min 53°F 52°F1027.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 32 mi51 min 53°F 1027 hPa
UPBC1 33 mi63 min SSW 2.9 G 5.1
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi31 min SSE 7.8 G 12 55°F 55°F10 ft1028.3 hPa53°F
PCOC1 - 9415144 - Port Chicago, CA 35 mi51 min 52°F 51°F1027.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi51 min 51°F 1027.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 45 mi96 min S 4.1
PRYC1 - 9415020 - Point Reyes, CA 45 mi51 min 54°F1027 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA3 mi85 minS 310.00 miMostly Cloudy53°F48°F83%1027.3 hPa
San Carlos Airport, CA5 mi24 minN 010.00 miOvercast52°F48°F88%1028.4 hPa
Oakland, Metro Oakland International Airport, CA9 mi28 minSE 65.00 miFog/Mist55°F48°F80%1028.2 hPa
Hayward, Hayward Air Terminal, CA11 mi27 minSSE 510.00 miOvercast52°F46°F83%1028.9 hPa
Half Moon Bay Airport, CA11 mi26 minN 05.00 miFog/Mist52°F50°F94%1028.4 hPa
Palo Alto Airport, CA13 mi34 minSE 410.00 miMostly Cloudy52°F46°F82%1028.1 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrE3E4E4W8W9W85W11--W12W7W8W7S4CalmSE4NW4CalmCalmSE3S3SE4S3SE4
1 day agoW10W10W10W11W14W14W11W11W12W12W15W19W16W16W16W14CalmCalmS3SE4CalmSE3CalmCalm
2 days agoSE6E4E3NE5NE6NE3CalmW7NW5W9SW8W4W4E3E3E5S6SE5W9CalmSW3W8SW11W8

Tide / Current Tables for Coyote Point Marina, San Francisco Bay, California
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Coyote Point Marina
Click for Map
Tue -- 02:55 AM PST     6.53 feet High Tide
Tue -- 07:16 AM PST     Sunrise
Tue -- 08:29 AM PST     2.68 feet Low Tide
Tue -- 09:39 AM PST     Moonrise
Tue -- 02:02 PM PST     6.73 feet High Tide
Tue -- 05:28 PM PST     Sunset
Tue -- 08:39 PM PST     0.40 feet Low Tide
Tue -- 09:14 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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45.36.26.56.15.34.23.32.82.83.44.45.66.46.76.45.442.51.30.50.412.2

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Tue -- 12:22 AM PST     1.58 knots Max Flood
Tue -- 04:01 AM PST     -0.00 knots Slack
Tue -- 06:41 AM PST     -0.94 knots Max Ebb
Tue -- 07:15 AM PST     Sunrise
Tue -- 09:39 AM PST     0.00 knots Slack
Tue -- 09:39 AM PST     Moonrise
Tue -- 12:12 PM PST     1.08 knots Max Flood
Tue -- 03:18 PM PST     -0.00 knots Slack
Tue -- 05:28 PM PST     Sunset
Tue -- 06:49 PM PST     -1.50 knots Max Ebb
Tue -- 09:14 PM PST     Moonset
Tue -- 10:11 PM PST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.51.20.70-0.5-0.9-0.9-0.7-0.30.20.81.110.70.2-0.4-0.9-1.4-1.5-1.2-0.7-0.10.6

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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