Tuesday, January28, 2020
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Marine Weather and Tides
Broadmoor, 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 7:15AMSunset 5:30PM Tuesday January 28, 2020 7:42 AM PST (15:42 UTC) Moonrise 9:42AMMoonset 9:16PM 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 257 Am Pst Tue Jan 28 2020
.small craft advisory in effect from this evening through Wednesday afternoon...
Today..SW winds 5 to 10 kt, becoming nw 5 to 15 kt this afternoon. Wind waves 1 to 2 ft. W swell 8 to 10 ft at 15 seconds. A chance of rain.
Tonight..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 9 to 11 ft at 15 seconds.
Wed..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 4 to 5 ft. W swell 9 to 11 ft at 14 seconds.
Wed night..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 5 to 6 ft. W swell 6 to 8 ft at 14 seconds.
Thu..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 5 to 6 ft. W swell 7 to 9 ft at 15 seconds.
Thu night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 8 to 10 ft at 16 seconds.
Fri..NW winds 5 to 10 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft.
Sat..N winds up to 10 kt. Wind waves 1 ft. W swell 5 to 7 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...seas 7 to 8 ft with a dominant period of 14 seconds. Across the bar...seas 8 to 10 ft with a dominant period of 14 seconds. Maximum ebb current of 1.7 kt at 07:13 am Tuesday and 2.4 kt at 07:07 pm Tuesday.
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 Broadmoor CDP, CA
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location: 37.74, -122.59     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
46237 - San Francisco Bar, CA (142) 4 mi43 min 54°F7 ft
FTPC1 - 9414290 - San Francisco, CA 8 mi61 min 53°F 54°F1027.3 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi55 min 52°F 1026.1 hPa
PXSC1 11 mi55 min 54°F 54°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 13 mi62 min SSE 4.1 52°F 1027 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 13 mi33 min SSE 9.7 G 14 54°F 54°F1028 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi73 min SSE 8.9 G 11
OBXC1 14 mi55 min 53°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi55 min 52°F 1027.2 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi55 min 54°F
RCMC1 - 9414863 - Richmond, CA 16 mi55 min 54°F
LNDC1 17 mi55 min 53°F 1027.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 17 mi55 min 54°F 1027.6 hPa
RTYC1 - 9414523 - Redwood City, CA 26 mi55 min 52°F 56°F1028.3 hPa
PRYC1 - 9415020 - Point Reyes, CA 27 mi55 min 54°F1026.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 28 mi55 min 53°F 1026.8 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 31 mi33 min SSE 9.7 G 14 55°F 55°F1027.9 hPa52°F
MZXC1 - 9415102 - Martinez-Amorco CA 32 mi55 min 52°F1027.1 hPa
UPBC1 32 mi73 min SSW 5.1 G 12
PCOC1 - 9415144 - Port Chicago, CA 36 mi55 min 53°F 51°F1026.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi55 min 1026.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 44 mi118 min WSW 1.9
46214 - Point Reyes, CA (029) 48 mi43 min 55°F10 ft

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, CA15 mi47 minS 310.00 miMostly Cloudy53°F48°F83%1027.3 hPa
Half Moon Bay Airport, CA17 mi48 minN 010.00 miOvercast50°F50°F100%1027.8 hPa
Oakland, Metro Oakland International Airport, CA20 mi50 minSE 910.00 miOvercast54°F50°F87%1027.6 hPa
San Carlos Airport, CA23 mi48 minSSE 510.00 miMostly Cloudy50°F48°F94%1028.1 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrCalmE3E4E4W8W9W85W11--W12W7W8W7S4CalmSE4NW4CalmCalmSE3S3SE4S3
1 day agoW8W10W10W10W11W14W14W11W11W12W12W15W19W16W16W16W14CalmCalmS3SE4CalmSE3Calm
2 days agoNE5SE6E4E3NE5NE6NE3CalmW7NW5W9SW8W4W4E3E3E5S6SE5W9CalmSW3W8SW11

Tide / Current Tables for San Francisco Bar, California
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San Francisco Bar
Click for Map
Tue -- 01:44 AM PST     4.84 feet High Tide
Tue -- 06:57 AM PST     2.65 feet Low Tide
Tue -- 07:17 AM PST     Sunrise
Tue -- 09:41 AM PST     Moonrise
Tue -- 12:39 PM PST     5.09 feet High Tide
Tue -- 05:29 PM PST     Sunset
Tue -- 07:14 PM PST     0.37 feet Low Tide
Tue -- 09:16 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.14.74.84.53.93.32.82.72.83.344.655.14.73.82.71.60.80.40.51.11.92.9

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Tue -- 02:54 AM PST     -0.00 knots Slack
Tue -- 05:07 AM PST     -0.94 knots Max Ebb
Tue -- 07:17 AM PST     Sunrise
Tue -- 08:15 AM PST     0.00 knots Slack
Tue -- 09:40 AM PST     Moonrise
Tue -- 11:00 AM PST     0.86 knots Max Flood
Tue -- 02:11 PM PST     -0.00 knots Slack
Tue -- 05:15 PM PST     -1.50 knots Max Ebb
Tue -- 05:28 PM PST     Sunset
Tue -- 08:47 PM PST     0.01 knots Slack
Tue -- 09:15 PM PST     Moonset
Tue -- 11:47 PM PST     1.16 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.20.90.5-0.1-0.7-0.9-0.8-0.5-0.10.30.70.90.80.50.1-0.5-1.1-1.5-1.4-1-0.50.10.71.1

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 (10,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, CA
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