Tuesday, January28, 2020
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Marine Weather and Tides
Montara, 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 7:16AMSunset 5:29PM Monday January 27, 2020 11:43 PM PST (07:43 UTC) Moonrise 9:13AMMoonset 8:18PM Illumination 11% Phase: Waxing Crescent; Moon at 3 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- 910 Pm Pst Mon Jan 27 2020
Tonight..W winds up to 10 kt. Wind waves 1 ft. W swell 9 to 11 ft at 16 seconds. A chance of showers after midnight.
Tue..SW winds up to 10 kt. Wind waves 1 ft. W swell 8 to 10 ft at 15 seconds. A slight chance of showers.
Tue night..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 14 seconds.
Wed..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 8 to 10 ft at 14 seconds.
Wed night..NW winds 15 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 6 to 8 ft at 13 seconds.
Thu..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 6 to 8 ft at 13 seconds and W 3 to 5 ft at 22 seconds.
Thu night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 18 seconds.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft.
Sat..N winds 5 to 15 kt. Wind waves 1 to 2 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 910 Pm Pst Mon Jan 27 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A cool front will move over the coastal waters and bays Tuesday with light showers. Northerly winds will develop and increase over the coastal waters Tuesday night into Wednesday steepening wind waves combining with northwest swell creating hazardous conditions for small craft. A long period northwest swell will arrive later this week.


7 Day Forecast for Marine Location Near Montara, CA
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location: 37.57, -122.58     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 280703 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1103 PM PST Mon Jan 27 2020

SYNOPSIS. Light showers are possible over the North Bay late tonight into Tuesday, and possibly a bit farther south. Dry conditions are then forecast regionwide over the remainder of the week as high pressure builds over California. Expect a warming trend from Wednesday through Saturday. Cooling will develop by Sunday.

DISCUSSION. As of 8:50 PM PST Monday . Evening IR satellite imagery shows a system pressing inland across coastal sections of the Pacific Northwest, with a trailing cold front approaching the northern California coast. Latest models indicate that light rain will reach the North Bay by late tonight (NAM), but perhaps not until around sunrise Tuesday (HRRR). Best rain chances are in the North Bay tomorrow morning, although a few light showers may develop as far south as San Mateo County by late morning. Wet roadways are a definite possibility in the North Bay during the morning commute, and perhaps as far south as San Francisco and San Mateo County by mid morning. All other areas should experience dry conditions during the morning commute. Isolated light showers may linger into the afternoon, otherwise dry conditions will round out the day.

For the remainder of the week, look for dry conditions regionwide along with a warming trend as an upper ridge builds strongly over California. H5 heights are forecast to climb as high as 587 dm by the end of the week, while 850 mb temperatures warm to about 15 degrees C. These developments will result in high temperatures that are 5 to 10 degrees warmer than average by Friday and Saturday.

From Previous Discussion . Looking out into the longer term, the CPC 6-10 day and 8-14 day outlooks show below normal precipitation for California. Additionally, the longer range GFS shows dry conditions across much of the region through early February. Ensemble QPF for both the GFS and the ECMWF show mainly dry conditions as well through at least the first week of February with only some occasional minor accumulations here and there. Overall, dry weather looks to persist across the region heading into next month.

AVIATION. as of 11:03 PM PST Monday . Cloud ceiling forecasts remain difficult for the overnight due to a transition from a weak warm front to mainly a weak cool front Tuesday. Outgoing night-time radiative cooling of the boundary layer will be slower tonight due to incoming mid to high level clouds from the northwest, however it's off to a solid start of low cloud development over the Salinas Valley to Monterey Bay. Tuesday's cool front spreads light showers from north to south during the day.

Vicinity of KSFO . VFR holding longer through the evening as sufficient drying continues to move in from the west. Lowering ceiling forecast Tuesday with cool front and light showers.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . IFR-MVFR cloud ceilings tonight and Tuesday morning, MVFR Tuesday. Isolated showers arriving Tuesday, mainly in the afternoon.

MARINE. as of 10:50 PM PST Monday . A cool front will move over the coastal waters and bays Tuesday with light showers. Northerly winds will develop and increase over the coastal waters Tuesday night into Wednesday steepening wind waves combining with northwest swell creating hazardous conditions for small craft. A long period northwest swell will arrive later this week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm until 3 AM SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm



PUBLIC FORECAST: Dykema/AS AVIATION/MARINE: Canepa

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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) 15 mi73 min 53°F10 ft
FTPC1 - 9414290 - San Francisco, CA 17 mi73 min 53°F 54°F1028.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi43 min SSW 7.8 G 9.7 54°F 55°F1029.2 hPa (-0.7)
PXSC1 19 mi73 min 55°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi73 min 53°F 1027.5 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi73 min 53°F 54°F1028.7 hPa
RTYC1 - 9414523 - Redwood City, CA 20 mi73 min 53°F 56°F1029.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi73 min SSE 2.9 G 4.1
OBXC1 21 mi73 min 53°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi73 min 52°F 1028.6 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 22 mi43 min SW 5.8 G 9.7 55°F 55°F1029.2 hPa52°F
LNDC1 22 mi73 min 53°F 1028.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi62 min Calm 51°F 1028 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 26 mi73 min 54°F 1028.7 hPa
RCMC1 - 9414863 - Richmond, CA 26 mi73 min 53°F 54°F1027.9 hPa
PRYC1 - 9415020 - Point Reyes, CA 36 mi73 min 54°F1028.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi73 min 53°F 1028.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi73 min 52°F 52°F1028.4 hPa
UPBC1 40 mi73 min W 8 G 8.9
PCOC1 - 9415144 - Port Chicago, CA 44 mi73 min 53°F 52°F1028.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi73 min 53°F 1028.4 hPa

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA6 mi48 minN 08.00 miA Few Clouds48°F46°F94%1029.1 hPa
San Francisco, San Francisco International Airport, CA12 mi1.8 hrsS 49.00 miPartly Cloudy52°F46°F83%1028.7 hPa
San Carlos Airport, CA18 mi48 minS 310.00 miFair52°F48°F88%1028.8 hPa
Oakland, Metro Oakland International Airport, CA21 mi50 minSSW 310.00 miMostly Cloudy54°F48°F83%1028.6 hPa

Link to 5 minute data for KHAF

Wind History from HAF (wind in knots)
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Last 24hrNE5CalmNE4CalmNE3CalmNE3CalmCalmCalmCalmW3NW4NW4NW8NW8NW7NW5N3CalmCalmCalmCalmCalm
1 day agoSE5S7W7W4CalmSE5S5SW3NW4N3NW7NW6--NW9NW6NW7NW9NW11NW8NW11NW11NE4CalmN6
2 days agoCalmCalmSE3CalmCalmNW3N3NE3SE3CalmW5W6SE5W4NW6W6CalmS3CalmSE4CalmCalmCalmCalm

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Tue -- 01:13 AM PST     4.74 feet High Tide
Tue -- 06:38 AM PST     2.65 feet Low Tide
Tue -- 07:16 AM PST     Sunrise
Tue -- 09:40 AM PST     Moonrise
Tue -- 12:08 PM PST     4.99 feet High Tide
Tue -- 05:29 PM PST     Sunset
Tue -- 06:55 PM PST     0.37 feet Low Tide
Tue -- 09:15 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.44.74.64.23.63.12.72.733.54.24.754.84.23.32.21.20.60.40.71.42.33.3

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 (2,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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