Tuesday, July7, 2020
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Marine Weather and Tides
Foster City, 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 5:53AMSunset 8:34PM Tuesday July 7, 2020 3:13 AM PDT (10:13 UTC) Moonrise 9:49PMMoonset 7:18AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 236 Am Pdt Tue Jul 7 2020
Today..SW winds 5 to 15 kt. Gusts up to 25 kt this afternoon.
Tonight..SW winds 5 to 15 kt.
Wed..SW winds 5 to 15 kt with gusts up to 25 kt.
Wed night..SW winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt with gusts up to 25 kt.
Thu night..W winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
PZZ500 236 Am Pdt Tue Jul 7 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A 1032 mb high is over the eastern pacific while a 1000 mb low is over western utah. Strong pressure gradients will produce strong and gusty northwest winds through Wednesday. The strongest winds will be off the big sur coast where gale force gusts are possible. These strong winds will generate steep fresh swell and hazardous seas conditions. Winds will diminish after Wednesday.


7 Day Forecast for Marine Location Near Foster City city, CA
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location: 37.55, -122.24     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 070542 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1042 PM PDT Mon Jul 6 2020

SYNOPSIS. Slightly cooler temperatures will continue into tomorrow as an upper trough moves through the region. This will likely result in the deepening 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 as high pressure builds over the region.

DISCUSSION. as of 09:09 PM PDT Monday . The axis of the 567dm 500mb trough has continued its trek towards the Pacific Northwest shoreline, and will move ashore within the next couple of hours. Its effects have been largely pronounced over northern California and the Washington and Oregon coasts, where low clouds and a well- defined marine layer have dominated the area. Back in our CWA the opposite has been the case, with the nearest clouds being over 100 miles off the coast. Despite the clear skies,temperatures across the CWA were cooler than what was observed yesterday, while gusty winds peaked rather early in coastal locations such as SFO, where gusts of 47 mph were reported. Breezy onshore winds have started easing this evening and should continue to do so overnight.

These cooler conditions will continue for tomorrow along the coast as the upper-level trough continues its trek towards Idaho and Montana, with some parts of the interior expected to reach similar high temps as today. Models are also suggesting that with the passage of the trough axis from our CWA we should also expect for the marine layer to return tomorrow, especially along the central coast. As onshore winds pick up and northwesterly flow associated with the trough carry over into the evening, we can expect the marine later to become even more widespread and for the coastal stratus to build back to seasonal levels tomorrow night and through the middle of the week.

Looking ahead to Wednesday and the end of next week, models have maintained agreement with regards to upper-level ridge that is progged to build over the Southwestern US. Both the GFS and ECMWF runs for today have slid the center of the expected 595-599dm 500mb ridge more to the south and east of the 4-corners region. Nevertheless, its influence over our CWA looks to be greater than the next offshore upper-level trough. As a result, we should see warmer conditions to gradually build through the end of the workweek in the interior. The increased zonal flow owing to the upper-level ridge will also allow for the marine layer to stick around longer as is to be expected this time of the year.

AVIATION. As of 10:40 PM PDT Monday . For 06Z TAFS . Locally gusty west to northwest winds will continue to gradually diminish overnight. Patchy MVFR ceilings near the coast at 06Z will become more widespread overnight and spread inland early Tuesday morning as the marine layer deepens. However, not all Bay Area terminals are expected to be impacted. VFR conditions are forecast to develop at all terminals by 18Z Tuesday, except at KMRY where MFVR ceilings may persist longer. Onshore breezes tomorrow afternoon are not expected to be as strong as on Monday.

Vicinity of KSFO . VFR through most of the forecast period. West winds will gust near 30 kt through 09Z and then gradually diminish thereafter. Stratus will likely develop locally into SF Bay late Monday night and MVFR ceilings are possible at the terminal between about 11Z and 15Z, but confidence is low on this point. West winds will increase once again on Tuesday afternoon, but will not be as strong as on Monday.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . MVFR ceilings will become more widespread overnight and then persist until 18Z Tuesday. Also, areas of IFR ceilings possible starting at 09Z and continuing into Tuesday morning. Light to moderate westerly winds will prevail.

MARINE. as of 9:00 PM PDT Monday . Steep pressure gradients between strong high pressure well offshore and low pressure over the interior will continue to produce strong and gusty northwest winds across the coastal waters through Tuesday, especially over the near shore waters off the Big Sur coast where gales will likely continue. 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. Tngt. SCA . Pt Arena to Pt Reyes 0-10 nm 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



PUBLIC FORECAST: Diaz/Canepa AVIATION: Dykema MARINE: Dykema

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 3 mi56 min SW 5.1 G 8 59°F 74°F1015.5 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi56 min 70°F
LNDC1 17 mi56 min WSW 4.1 G 7 57°F 1014 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi56 min WSW 5.1 G 6
OBXC1 18 mi56 min 57°F 52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi56 min SSW 6 G 13 56°F 1012.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 19 mi56 min W 2.9 G 6 57°F 1013.9 hPa
PXSC1 19 mi56 min 56°F 51°F
FTPC1 - 9414290 - San Francisco, CA 21 mi56 min 63°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 25 mi56 min SSE 13 G 17 58°F 1014 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 26 mi52 min Calm 57°F 1013 hPa
46237 - San Francisco Bar, CA (142) 27 mi44 min 53°F6 ft
RCMC1 - 9414863 - Richmond, CA 27 mi56 min 65°F
UPBC1 34 mi56 min WSW 11 G 14
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi56 min WSW 9.9 G 11 61°F 68°F1013.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi34 min WNW 21 G 27 54°F 51°F1014.6 hPa50°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 35 mi56 min SW 13 G 17 60°F 1013.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 37 mi56 min SW 9.9 G 14 57°F 69°F1012.4 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 37 mi34 min NW 21 G 25 56°F 1015.7 hPa52°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi56 min WNW 14 G 20 62°F 1011.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 46 mi89 min W 8.9

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA1 mi74 minW 610.00 miFair57°F48°F72%1015.6 hPa
San Francisco, San Francisco International Airport, CA8 mi78 minW 24 G 2810.00 miA Few Clouds and Windy55°F48°F77%1014.3 hPa
Hayward, Hayward Air Terminal, CA10 mi80 minWSW 1010.00 miPartly Cloudy57°F50°F78%1015.8 hPa
Oakland, Metro Oakland International Airport, CA10 mi81 minW 810.00 miA Few Clouds53°F50°F89%1015.1 hPa
Mountain View, Moffett Field, CA13 mi79 minN 010.00 miA Few Clouds59°F50°F72%1015.2 hPa
Half Moon Bay Airport, CA14 mi79 minNNW 87.00 miOvercast55°F50°F82%1016.3 hPa
San Jose, San Jose International Airport, CA21 mi81 minNNE 310.00 miFair59°F48°F67%1015.2 hPa

Link to 5 minute data for KSQL

Wind History from SQL (wind in knots)
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1 day agoCalmNW4CalmCalmCalm33N5NE6N5N9--W11
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2 days agoCalmCalmCalmCalmCalmCalmCalmN5N7N7NW8N10W8W9W12W10
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Tide / Current Tables for Bay Slough, west end, San Francisco Bay, California
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Bay Slough
Click for Map
Tue -- 01:46 AM PDT     8.44 feet High Tide
Tue -- 05:54 AM PDT     Sunrise
Tue -- 08:18 AM PDT     Moonset
Tue -- 09:18 AM PDT     -1.00 feet Low Tide
Tue -- 04:02 PM PDT     6.70 feet High Tide
Tue -- 08:32 PM PDT     Sunset
Tue -- 09:20 PM PDT     2.92 feet Low Tide
Tue -- 10:48 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.98.18.47.96.74.92.80.9-0.4-1-0.80.21.73.456.26.76.45.54.43.433.14

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Tue -- 02:54 AM PDT     -0.00 knots Slack
Tue -- 05:54 AM PDT     Sunrise
Tue -- 06:35 AM PDT     -2.05 knots Max Ebb
Tue -- 08:18 AM PDT     Moonset
Tue -- 10:06 AM PDT     0.01 knots Slack
Tue -- 01:01 PM PDT     1.99 knots Max Flood
Tue -- 04:41 PM PDT     -0.00 knots Slack
Tue -- 07:14 PM PDT     -0.93 knots Max Ebb
Tue -- 08:33 PM PDT     Sunset
Tue -- 10:00 PM PDT     0.00 knots Slack
Tue -- 10:48 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.20.7-0.1-0.8-1.5-2-2-1.6-1-0.111.721.81.40.6-0.2-0.7-0.9-0.8-0.5-00.7

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 (6,6,7,8)
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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 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.