Monday, July6, 2020
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Marine Weather and Tides
Santa Venetia, 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 5:52AMSunset 8:37PM Monday July 6, 2020 12:26 PM PDT (19:26 UTC) Moonrise 9:14PMMoonset 6:14AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 850 Am Pdt Mon Jul 6 2020
.small craft advisory in effect through this evening...
Rest of today..SW winds 10 to 20 kt, increasing to 15 to 20 kt with gusts up to 30 kt this afternoon.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt.
Tue..SW winds 5 to 15 kt, increasing to 10 to 20 kt in the afternoon.
Tue night..SW winds 5 to 10 kt.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed night..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu..SW winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
PZZ500 850 Am Pdt Mon Jul 6 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... An upper level trough approaching the pacific northwest and surface high pressure well offshore will produce strong and gusty northwest winds across the coastal waters through tonight. Gale force gusts are possible along the northern near shore waters and off of the big sur coast. These strong northwest winds will also generate steep fresh swell and hazardous seas conditions. Winds will diminish later in the week.


7 Day Forecast for Marine Location Near Santa Venetia, CA
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location: 38.02, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 061751 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1051 AM PDT Mon Jul 6 2020

SYNOPSIS. Monday afternoon high temperatures will be slightly cooler as onshore flow increases with a likely return of the marine layer for the immediate coastline. Temperatures are expected to be similar through midweek before warming late in the week and into next weekend.

DISCUSSION. as of 09:03 AM PDT Monday . Satellite imagery shows a little coastal stratus around the Monterey Bay slowly dissipating as the marine layer remains at around 1,000 ft AGL per the Fort Ord Profiler. Can also see smoke near Gilroy from the Crews Fire. Temperatures across the region this morning are a few degrees cooler than yesterday as an upper level trough approaches. Conditions are still expected to be a bit cooler than yesterday as an upper trough approaches and the onshore gradient increases. Expect highs this afternoon in the upper 60s to low 70s along the coast with mainly 70s and 80s inland. Isolated spots across the interior will reach the low to mid 90s. Gusty onshore winds still in the forecast for today, particularly along the coast and through the gaps. Observations have shown gusts in the hills and along the coast between 30 and about 35 mph thus far this morning. Continued slight cooling and breezy conditions tomorrow as the upper trough progresses eastward. No changes to the forecast this morning. For additional information please refer to the previous discussion.

PREV DISCUSSION. as of 03:28 AM PDT Monday . Satellite imagery overnight reveals mostly clear skies across the Bay Area and Central Coast. The marine layer is trying to make a comeback with a few patchy low clouds along the San Mateo Coast and in Monterey Bay, but widespread stratus remains offshore. Of greater significance on the satellite is the heat signature from the Crews Fire. GOES West fire products continue to indicate active fire behavior overnight, which is further confirmed on webcams. Weather conditions near the fire as of 3 AM are improving - increasing humidity, decreasing winds, and cooling temperatures. Fine fuel moisture may have increased slightly with the increasing humidity, but in the grand scheme of things fuels remain very dry.

To kick off the work week after a holiday weekend temperatures will be a tad cooler today. An upper level trough currently off the PacNW Coast will continue its eastward trajectory today. The trough will help to lower 500mb heights, lower 850mb temperatures and increase onshore flow. In fact, the onshore gradient is forecast to ramp up to nearly 5 mb this afternoon per the NAM model. This would definitely translate to gusty winds through the Golden Gate, Delta and any gap/pass, which could include some of the terrain near the Crews Fire.

The cooler gustier weather will continue on Tuesday as well as the upper level trough continues to move through. It should also be note the lowering 500 mb heights and developing NW flow over the waters will result in a deepening marine layer along the coast and locally inland.

Zonal flow builds over the state midweek as high pressure begins to re-establish itself over the Desert Southwest. Medium range models show that by the end of the work week and moreso over the weekend high pressure begins to take hold over the region. The building ridge of high pressure will lead to a compression of the marine layer and warming temperatures. Current forecast will have a large temperature spread with 60/70s at the coast to lower 100s far interior locations next weekend.

AVIATION. as of 10:50 AM PDT Sunday . A dry air mass above the inversion layer has mixed into the lower levels allowing the stratus to dissipate across the region giving way to VFR conditions. Onshore winds will once again increase through the afternoon and remain gusty into the early evening before diminishing slightly overnight. The development of MVFR/IFR ceilings will impact the Monterey Bay terminals late this evening before spreading inland early Tuesday morning as the marine layer deepens, yet not all Bay Area terminals will be impacted.

Vicinity of KSFO . VFR. West winds will gradually increase through the afternoon with gusts in excess of 30 kt beyond 21Z. Winds diminish slightly late in the night with the potential for stratus development early Tuesday morning. However, confidence remains low with respect to the development of MVFR/IFR ceilings.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR. Breezy onshore winds will persist through the afternoon before diminishing late this evening. MVFR/IFR ceilings likely to develop between 03-06Z Tuesday as the marine layer deepens and onshore flow persists.

MARINE. as of 08:50 AM PDT Monday . An upper level trough approaching the Pacific Northwest and surface high pressure well offshore will produce strong and gusty northwest winds across the coastal waters through tonight. Gale force gusts are possible along the northern near shore waters and off of the Big Sur coast. These strong northwest winds will also generate steep fresh swell and hazardous seas conditions. Winds will diminish later in the week.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm GLW . Pt Pinos to Pt Piedras Blancas 0-10 nm GLW . Pt Arena to Pt Reyes 0-10 nm SCA . SF Bay from 11 AM SCA . Mry Bay from 11 AM



PUBLIC FORECAST: AS/MM AVIATION: RGass MARINE: RGass

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 8 mi57 min SSE 7 G 13 64°F 66°F1014.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 9 mi47 min ESE 6 66°F 1014 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 11 mi57 min S 15 G 17 63°F 1015.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 13 mi57 min WSW 8.9 G 12 69°F 1013.6 hPa
FTPC1 - 9414290 - San Francisco, CA 15 mi57 min W 11 G 22 61°F 65°F1014.9 hPa
PXSC1 16 mi57 min 64°F 52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 16 mi57 min SSW 5.1 G 12 65°F 1013.9 hPa
OBXC1 17 mi57 min 63°F 52°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 17 mi57 min WSW 6 G 8.9 65°F 1015 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi57 min SW 7 G 8.9
46237 - San Francisco Bar, CA (142) 18 mi57 min 61°F6 ft
LNDC1 19 mi57 min S 7 G 8.9 64°F 1015 hPa
UPBC1 20 mi57 min W 12 G 15
AAMC1 - 9414750 - Alameda, CA 20 mi57 min WSW 5.1 G 6 63°F 69°F1015.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 20 mi57 min W 11 G 13 72°F 69°F1013.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 25 mi57 min W 16 G 19 72°F 69°F1013 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi37 min NW 25 G 33 56°F 54°F8 ft1016 hPa51°F
SFXC1 - San Francisco Bay Reserve, CA 28 mi102 min W 13
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi57 min W 8.9 G 19 77°F 1012.4 hPa
RTYC1 - 9414523 - Redwood City, CA 39 mi57 min WNW 13 G 16 69°F 74°F1015.9 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi37 min NW 27 G 33 54°F 51°F8 ft1015.7 hPa49°F

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA9 mi52 minSW 1710.00 miFair75°F48°F39%1013.5 hPa
Petaluma Municipal Airport, CA17 mi32 minWSW 10 G 156.00 miFair with Haze75°F48°F39%1014.2 hPa
Napa, Napa County Airport, CA18 mi33 minSSW 1410.00 miFair73°F52°F48%1012.7 hPa
Concord, Buchanan Field, CA24 mi34 minWSW 10 G 1610.00 miFair82°F41°F23%1011.9 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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Tide / Current Tables for Gallinas, Gallinas Creek, San Pablo Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Petaluma River Approach #3/#4, San Pablo Bay, California Current
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Petaluma River Approach #3/#4
Click for Map
Mon -- 02:05 AM PDT     -0.00 knots Slack
Mon -- 05:53 AM PDT     Sunrise
Mon -- 06:07 AM PDT     -0.96 knots Max Ebb
Mon -- 07:14 AM PDT     Moonset
Mon -- 09:47 AM PDT     0.01 knots Slack
Mon -- 12:35 PM PDT     0.62 knots Max Flood
Mon -- 04:46 PM PDT     -0.00 knots Slack
Mon -- 06:52 PM PDT     -0.32 knots Max Ebb
Mon -- 08:35 PM PDT     Sunset
Mon -- 08:36 PM PDT     0.00 knots Slack
Mon -- 10:12 PM PDT     Moonrise
Mon -- 10:52 PM PDT     0.64 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.30-0.4-0.7-0.9-1-0.9-0.7-0.30.10.40.60.60.50.40.2-0.1-0.3-0.3-0.20.20.50.6

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 (15,3,4,5)
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Ground Weather Radar Station Sacramento, 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 numerous 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.