Friday, December6, 2019
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Marine Weather and Tides
Newark, 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 7:07AMSunset 4:51PM Friday December 6, 2019 1:21 PM PST (21:21 UTC) Moonrise 2:02PMMoonset 1:35AM Illumination 75% Phase: Waxing Gibbous; Moon at 10 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- 847 Am Pst Fri Dec 6 2019
.small craft advisory in effect through Saturday evening...
Today..SE winds 10 to 20 kt with gusts up to 30 kt. A chance of rain this afternoon.
Tonight..SE winds 10 to 20 kt with gusts up to 30 kt. Rain.
Sat..S winds 15 to 20 kt with gusts up to 40 kt. Rain and a slight chance of Thunderstorms.
Sat night..S winds 5 to 15 kt with gusts up to 25 kt. Rain.
Sun..W winds 5 to 15 kt. Rain likely.
Sun night..NW winds 5 to 15 kt.
Mon..N winds around 5 kt.
Tue..NE winds around 5 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 847 Am Pst Fri Dec 6 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A storm system will move through the waters from north to south over the next 24 hours, bringing unsettled weather today into the weekend. As a result, southerly gale force gusts will develop across the waters today. These winds will generate large wind waves and hazardous seas. Moderate west swell will gradually build to around 10 to 12 feet tonight and continue through Saturday night. Showers and isolated Thunderstorms will be possible this evening through Saturday.


7 Day Forecast for Marine Location Near Newark, CA
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location: 37.47, -122.07     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 061759 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 959 AM PST Fri Dec 6 2019

SYNOPSIS. Southerly winds will continue to increase today ahead of an incoming cold front. Rain will develop across the North Bay this afternoon and then spread southward tonight. Showery and cool on Saturday with isolated thunderstorms possible. Lingering showers on Sunday but trending drier by afternoon. Dry weather returns Monday and Tuesday with a slight chance of rain by midweek.

DISCUSSION. as of 8:52 AM PST Friday . Satellite imagery shows the approaching storm system approximately 640 miles due west of Cape Mendocino, with the associated frontal band nearing the North Coast. Latest computer models continue the trend of slowing down the arrival of this system. The 12Z Nam has the frontal band moving into Sonoma County just after 00Z (4 PM PST) and holds off rain in San Francisco until after 7 PM. The bulk of the rainfall with this first wave is forecast to fall in the North Bay, and to a lesser extent, the Santa Cruz Mountains. A second front will sweep through the entire district on Saturday and will bring more rainfall to the area through Saturday evening, along with a slight chance of thunderstorms with small hail possible. The upper low will then finally move south along the coast on Sunday keeping showers going in its vicinity as it exits the area Sunday night. Latest storm-total rainfall estimates still show some 3-4 inch maxes for the North Bay hills with 1.5-3 inches for the Santa Cruz/Santa Lucia mtns. Rain shadowed Santa Clara/Salinas Valleys 0.25-0.50 on average with 0.50-1.00 inch elsewhere through Sunday night.

The Flash Flood watch for the Kincade burn area still looks valid with all models showing a bullseye of qpf in that area and the front strongest as it moves through northern Sonoma county this evening. Will need to monitor any convective lines and short term rain rates that could lead to problems over the burn area.

A Wind Advisory remains in effect for all areas beginning later this morning and continuing into Saturday morning. Strongest winds are expected along the coast and in the higher terrain. Gusty southeast winds will persist well into Saturday as the second front moves through.

Dry weather returns Monday and Tuesday with seasonable temperatures as high pressure rebuilds. A weak front may try and knock into the ridge by Weds with a slight chance of rain but not expecting anything of significance at this time.

AVIATION. as of 10:00 AM PST Friday . For 18z TAFS. Storm system has once again slowed down in latest guidance, pushing the timing back versus the previous TAFs. Frontal boundary looks less robust as it pushes south of the North Bay as well. That said, expecting very unsettled weather throughout the TAF for the North Bay and the latter half of the TAF for the remaining areas. Many impacts to aviation with this system from wet runways, an extended period of low level wind shear at around 2000 feet, and erratic stronger winds mixing down to the surface, south-southeast winds, and generally MVFR ceilings. Rain showers will come and go in the wake of the front at many TAF sites, making it difficult to pin down the periods of intermittently worse conditions.

Vicinity of KSFO . System has slowed down, delaying times versus previous TAF. Periods of rain from 01-02Z onward now expected with wet runways. Southeast winds throughout the period, increasing in strength as front draws closer to the airport. LLWS at 2000 feet at generally 35-50kt through the TAF. Infrequent gusts will mix down to the surface of varying speed, some in excess of 35kt. Intermittent ceilings in the 2000-4000 foot range by the afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Front is looking weaker by the time it makes it to KMRY/KSNS, thus, weakened winds and delayed timing in latest TAF. Fractured front arrives around 07-10Z tonight with trailing rain showers into the morning. Valley favored SE winds will bring very gusty conditions to KSNS through most of the TAF period, while KMRY could be wind sheltered for much of the event. That said, still expect to see limited LLWS / gusts at KMRY by late this afternoon.

MARINE. as of 09:49 AM PST Friday . A storm system will move through the waters from north to south over the next 24 hours, bringing unsettled weather today into the weekend. As a result, southerly gale force gusts will develop across the waters today. These winds will generate large wind waves and hazardous seas. Moderate west swell will gradually build to around 10 to 12 feet tonight and continue through Saturday night. Showers and isolated thunderstorms will be possible this evening through Saturday.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. Wind Advisory . CAZ006-505>513-516>518-528>530 Flash Flood Watch . CAZ506-507 SCA . SF Bay until 3 PM SCA . Pt Reyes to Pigeon Pt 0-10 nm until 3 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 3 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm until 3 PM GLW . SF Bay from 3 PM GLW . Pt Reyes to Pigeon Pt 0-10 nm from 3 PM GLW . Pigeon Pt to Pt Pinos 0-10 nm from 3 PM GLW . Pt Pinos to Pt Piedras Blancas 0-10 nm from 3 PM GLW . Pigeon Pt to Pt Piedras Blancas 10-60 nm from 3 PM GLW . Pt Arena to Pt Reyes 0-10 nm GLW . Pt Arena to Pigeon Pt 10-60 nm SCA . Mry Bay from 3 PM



PUBLIC FORECAST: Sims AVIATION: DRP MARINE: DRP

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 24 mi52 min SE 8 G 11 59°F 53°F1014.7 hPa
LNDC1 25 mi52 min SSE 11 G 16 64°F 1014.3 hPa
OBXC1 27 mi52 min 61°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 27 mi52 min SSE 8 G 12 63°F 1014.3 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 28 mi52 min SE 11 G 13 59°F 1013.4 hPa
FTPC1 - 9414290 - San Francisco, CA 31 mi52 min SSE 4.1 G 11 63°F 54°F1014.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 34 mi52 min SSE 16 G 18 63°F 1014.8 hPa
RCMC1 - 9414863 - Richmond, CA 36 mi52 min SSE 8.9 G 12 60°F 54°F1013.9 hPa
46237 - San Francisco Bar, CA (142) 37 mi52 min 54°F7 ft
UPBC1 39 mi52 min ENE 5.1 G 7
MZXC1 - 9415102 - Martinez-Amorco CA 39 mi52 min NE 5.1 G 6 52°F 54°F1015.1 hPa52°F
PCOC1 - 9415144 - Port Chicago, CA 41 mi52 min NE 6 G 6 53°F 53°F1014.7 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi52 min SSE 9.9 G 12 59°F 1015 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 42 mi52 min ESE 11 G 15 56°F 1014.4 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi32 min SSE 23 G 29 58°F 56°F8 ft1014 hPa55°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi32 min SSE 23 G 29 57°F 55°F8 ft1014.4 hPa
MLSC1 - Moss Landing, South Harbor, CA 48 mi48 min SE 13 G 38 64°F 1015.4 hPa51°F
ELXC1 - Elkhorn Slough Reserve, CA 49 mi97 min NNE 13 65°F 1016 hPa51°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA3 mi2.6 hrsSE 910.00 miPartly Cloudy64°F51°F64%1016.6 hPa
San Jose, San Jose International Airport, CA10 mi29 minSE 12 G 2310.00 miLight Rain66°F48°F52%1014.1 hPa
San Carlos Airport, CA10 mi35 minSSE 11 G 1810.00 miOvercast64°F48°F56%1014.6 hPa
Hayward, Hayward Air Terminal, CA13 mi28 minSE 1110.00 miMostly Cloudy66°F48°F52%1014.9 hPa
San Jose / Reid / Hillv, CA16 mi35 minSSE 14 G 2210.00 miMostly Cloudy66°F46°F49%1014.6 hPa
Oakland, Metro Oakland International Airport, CA18 mi29 minSSE 15 G 1910.00 miOvercast65°F50°F59%1014.1 hPa
San Francisco, San Francisco International Airport, CA19 mi86 minESE 1010.00 miMostly Cloudy60°F50°F70%1014.7 hPa
Livermore, Livermore Municipal Airport, CA21 mi29 minSSW 510.00 miOvercast66°F44°F45%1013.7 hPa
Half Moon Bay Airport, CA23 mi27 minS 19 G 2710.00 miMostly Cloudy and Breezy59°F51°F77%1014.6 hPa

Link to 5 minute data for KPAO

Wind History from PAO (wind in knots)
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Last 24hrCalm33Calm3--NW4NW5NW4Calm------------------SE7SE10SE9SE12SE9
1 day ago5--4--------------------------------CalmCalmCalmCalm4
2 days agoCalm--CalmCalmCalmCalmCalmCalmCalmCalm------------------E3E4CalmCalmCalm

Tide / Current Tables for Calaveras Point, west of, San Francisco Bay, California
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Calaveras Point
Click for Map
Fri -- 01:35 AM PST     Moonset
Fri -- 02:23 AM PST     1.41 feet Low Tide
Fri -- 07:08 AM PST     Sunrise
Fri -- 08:39 AM PST     8.19 feet High Tide
Fri -- 02:02 PM PST     Moonrise
Fri -- 03:49 PM PST     1.66 feet Low Tide
Fri -- 04:49 PM PST     Sunset
Fri -- 08:58 PM PST     6.80 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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321.51.62.53.95.67.188.27.66.65.23.82.61.81.72.33.75.26.46.86.55.6

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Fri -- 12:15 AM PST     -0.77 knots Max Ebb
Fri -- 01:35 AM PST     Moonset
Fri -- 02:52 AM PST     0.00 knots Slack
Fri -- 05:41 AM PST     1.08 knots Max Flood
Fri -- 07:08 AM PST     Sunrise
Fri -- 08:46 AM PST     -0.00 knots Slack
Fri -- 01:03 PM PST     -0.87 knots Max Ebb
Fri -- 02:02 PM PST     Moonrise
Fri -- 03:51 PM PST     0.01 knots Slack
Fri -- 04:49 PM PST     Sunset
Fri -- 06:21 PM PST     0.87 knots Max Flood
Fri -- 09:09 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-0.7-0.40.10.711.10.90.5-0.1-0.4-0.7-0.8-0.9-0.8-0.50.10.60.80.80.60.1-0.2-0.5

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (16,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.