Sunday, December15, 2019
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Marine Weather and Tides
Millbrae, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:15AMSunset 4:53PM Sunday December 15, 2019 3:03 PM PST (23:03 UTC) Moonrise 8:40PMMoonset 10:26AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 214 Pm Pst Sun Dec 15 2019
Tonight..N winds 5 to 10 kt, becoming northeast after midnight.
Mon..NE winds up to 10 kt.
Mon night..E winds 5 to 15 kt.
Tue..E winds 5 to 10 kt.
Tue night..E winds 10 to 15 kt. A chance of rain.
Wed..SE winds 10 to 20 kt with gusts up to 30 kt. A chance of rain.
Wed night..E winds around 5 kt. A chance of rain.
Thu..SE winds around 5 kt. A chance of rain.
Fri..SE winds 5 to 10 kt. A chance of rain.
PZZ500 214 Pm Pst Sun Dec 15 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will be breezy this evening as a coastal trough develops over southern california while high pressure builds offshore. Moderate to large northwest swell will gradually subside into early next week. The combination of gusty winds and large combined seas will create hazardous seas conditions through this evening, particularly for smaller vessels. Southerly winds will return by Monday night ahead of the next weather system.


7 Day Forecast for Marine Location Near Millbrae, CA
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location: 37.58, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 152145 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 145 PM PST Sun Dec 15 2019

SYNOPSIS. Blue skies surround the Bay Area and Central Coast on Sunday, with a few straggling showers over the ocean. Light northerly winds will shift to slightly off shore tonight. With minimal cloud cover and cooler air, cold overnight low temperatures are forecast around the region for Monday morning, which will be the coldest of the week. As high pressure builds dry air returns with warmer temperatures. Unsettled conditions return by midweek bringing the next chance for rain; and potentially again late next weekend.

DISCUSSION. as of 01:44 PM PST Sunday . An upper level ridge is building over the California coastline. This is allowing high pressure to provide clearer skies across the region for what seems like since Thanksgiving. There are still a few lingering isolated showers over the Pacific, but are not forecast to come over land. Winds are light and out of the north and will slowly shift over the course of the day to offshore. The light, dry offshore winds will inhibit any fog in the overnight hours. However, the lack of clouds will promote more cooling allowing for minimum temperatures to reach their lowest for this week. Widespread low-40s to upper 30s are expected around the Bay Area and Central Coast. Isolated areas of the North Bay Valleys, the East Bay Valleys, and Southern Monterey Interior County will be in the mid-30s just above freezing. Patchy frost in these areas may be possible.

The ridge will continue to build on Monday ushering in drier air and providing a warming trend, giving further confidence that Monday's the overnight lows tonight will be the minimum for the week. Seasonal Temperatures on Monday and Tuesday before the return of unsettled weather.

The next upper level trough moves in from the west on Tuesday night, bringing with it a weather system that will bring the next opportunity for rainfall for the region. Rainfall will be light to moderate at times and last through Wednesday morning, with spotty showers lingering over the area after the brunt of the system passes. Compared to what we have seen recently, accumulations will be minimal, with most areas seeing less than a half an inch. However, higher elevations of Marin County and the Santa Cruz Mountains, as well as coastal San Mateo could see up to an inch.

The trough-ridge-trough "rinse, repeat" pattern continues as high pressure tries to build on Thursday. But models are showing the next ridge to be too weak which will allow zonal flow to set up for the end of the work week. With consistent onshore flow drawing moisture in from the ocean, it would not be surprising if the the overcast skies with occasional pop-up showers/drizzle that we saw last week are seen again Thursday and Friday. The next system will approach the coast when the next trough moves in. Models are still disagreeing on timing, though it is looking more and more like a Saturday night into Sunday event. More to come as we get closer and models can better resolve the event.

AVIATION. as of 9:25 AM PST Sunday . For 18Z TAFs. VFR conditions are expected today. Some low level moisture remains with mainly FEW/SCT cumulus with bases 3000-5000 feet. Late this morning and afternoon cumulus will likely become more numerous over the terrain as the surface warms. Northwest winds have generally subsided since yesterday. Northwest winds mainly 5-10 kt today.

Vicinity of KSFO . VFR. Winds increasing to 10-15 kt this afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR through the period. W to NW winds 5-10 kt expected through the day today.

MARINE. as of 01:44 PM PST Sunday . Northwest winds will be breezy today as a coastal trough develops over southern California while high pressure builds offshore. Moderate to large northwest swell will gradually subside into early next week. The combination of gusty winds and large combined seas will create hazardous seas conditions through this evening, particularly for smaller vessels. Southerly winds will return later on Monday ahead of the next weather system.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pt Reyes 0-10 nm until 10 PM SCA . Pt Reyes to Pigeon Pt 0-10 nm until 10 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 10 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 10 PM SCA . Pt Arena to Pigeon Pt 10-60 nm until 10 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 10 PM SCA . Mry Bay until 5 PM



PUBLIC FORECAST: DK AVIATION: Sims MARINE: Sims

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 11 mi45 min NNW 7 G 8.9 54°F 57°F1024 hPa
AAMC1 - 9414750 - Alameda, CA 14 mi45 min 55°F
PXSC1 15 mi45 min 55°F 43°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi45 min N 1.9 G 2.9 54°F 1022.4 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi45 min WNW 1.9 G 2.9 54°F 1023.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi51 min SW 1.9 G 1.9
OBXC1 16 mi45 min 55°F 41°F
LNDC1 16 mi45 min NNW 5.1 G 7 56°F 1023.2 hPa
FTPC1 - 9414290 - San Francisco, CA 16 mi51 min WSW 1 G 4.1 56°F 55°F1023.4 hPa
46237 - San Francisco Bar, CA (142) 19 mi33 min 55°F8 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 22 mi34 min Calm 55°F 1024 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 23 mi45 min N 6 G 8.9 58°F 1023.5 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi45 min 55°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 27 mi23 min NW 18 G 21 54°F 56°F1024.3 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 30 mi33 min NW 18 G 23 55°F 57°F1024.3 hPa45°F
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi51 min WSW 4.1 G 5.1 54°F 54°F1023.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi45 min WSW 4.1 G 5.1 56°F 1022.9 hPa
UPBC1 35 mi45 min W 4.1 G 5.1
PCOC1 - 9415144 - Port Chicago, CA 38 mi45 min NNW 1.9 G 1.9 55°F 54°F1022.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi51 min WNW 4.1 G 4.1 56°F 1023.1 hPa
PRYC1 - 9415020 - Point Reyes, CA 42 mi45 min 54°F1023.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 47 mi78 min WSW 4.1 58°F 1023 hPa39°F

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 mi67 minWNW 1310.00 miPartly Cloudy57°F42°F58%1023.4 hPa
San Carlos Airport, CA8 mi76 minNW 510.00 miMostly Cloudy57°F41°F55%1023.7 hPa
Half Moon Bay Airport, CA8 mi63 minNNW 14 G 1910.00 miFair55°F44°F67%1024 hPa
Oakland, Metro Oakland International Airport, CA12 mi70 minNNW 710.00 miPartly Cloudy58°F41°F53%1023.8 hPa
Hayward, Hayward Air Terminal, CA15 mi69 minWNW 910.00 miPartly Cloudy56°F39°F55%1024.2 hPa
Palo Alto Airport, CA16 mi76 minN 610.00 miA Few Clouds55°F42°F63%1023.7 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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1 day agoSE11N5W6W8SW5SW7SW5W6W10W8W11W17NW13W13W6W9W10W15
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2 days agoNE5E33E4N4N4NW5NW5W5NW6W5CalmCalmCalmCalmNW3CalmS3CalmNW3NW8W9W4SE9

Tide / Current Tables for Coyote Point Marina, San Francisco Bay, California (3)
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Coyote Point Marina
Click for Map
Sun -- 03:17 AM PST     6.30 feet High Tide
Sun -- 07:16 AM PST     Sunrise
Sun -- 08:07 AM PST     3.15 feet Low Tide
Sun -- 10:25 AM PST     Moonset
Sun -- 01:39 PM PST     7.86 feet High Tide
Sun -- 04:51 PM PST     Sunset
Sun -- 08:39 PM PST     Moonrise
Sun -- 08:57 PM PST     -0.90 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.14.65.76.36.15.44.43.53.23.44.35.66.87.77.87.364.22.30.6-0.6-0.9-0.50.6

Tide / Current Tables for Oyster Point 2.8 mi E, South San Francisco Bay, California Current
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Oyster Point 2.8 mi E
Click for Map
Sun -- 03:38 AM PST     -0.01 knots Slack
Sun -- 06:12 AM PST     -0.88 knots Max Ebb
Sun -- 07:16 AM PST     Sunrise
Sun -- 08:35 AM PST     0.00 knots Slack
Sun -- 10:26 AM PST     Moonset
Sun -- 11:36 AM PST     0.68 knots Max Flood
Sun -- 02:14 PM PST     -0.00 knots Slack
Sun -- 04:51 PM PST     Sunset
Sun -- 06:20 PM PST     -1.96 knots Max Ebb
Sun -- 08:39 PM PST     Moonrise
Sun -- 09:34 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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1.110.70.3-0.2-0.7-0.9-0.7-0.30.10.40.60.70.50.1-0.4-1-1.6-1.9-1.8-1.2-0.50.20.7

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 (18,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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