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Marine Weather and Tides Belvedere, CA Version 3.4

What's New / NOTES 10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome. 10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

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Sunrise 7:19AM

Sunset 6:29PM

Wednesday October 17, 2018 3:23 AM PDT (10:23 UTC)

Moonrise 2:05PM

Moonset 12:00AM

Illumination 54%

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.

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7 Day Forecast for Marine Location Near Belvedere, CA

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Area Discussion for - San Francisco/Monterey Bay Area, CA

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Fxus66 kmtr 170950 afdmtr area forecast discussion national weather service san francisco bay area 250 am pdt Wed oct 17 2018 Synopsis Daytime will remain seasonably warm with patchy coastal clouds at night will continue the rest of the week and into the weekend. The forecast remains dry through the middle of next week. Cooler weather returns next week. Discussion As of 02:50 am pdt Wednesday... Offshore flow continues to weaken (sfo-wmc gradient down another 4mb) as onshore flow increase. Overnight GOES east satellite fog product shows a summer type set up with coastal low clouds pushing locally inland. Automated stations puts cloud heights at only a few hundred feet with patchy dense fog. Therefore, added some patchy dense fog around monterey bay, san mateo coast and santa rosa vicinity. Expect clearing back to the coast by mid-morning with sunny skies this afternoon. Similar to yesterday morning, it will be chilly with a few interior pockets dipping into the upper 30s. The longwave pattern aloft will gradually evolve over the next few days and moreso next week. Currently the upper low over northern arizona will continue to drift to the NE as ridging builds across the pac nw. By Friday, high pressure aloft becomes established over or as low pressure develops over socal as a weak rex block into the weekend. So what does this mean for the bay area? Mild daytime temperatures with cool overnight temperatures. Night and morning low clouds will be possible along the coast and locally inland. Conf is low on extent of clouds as some weak offshore flow remains. Above the cloud deck, dry conditions will remain over the hills keeping fire weather concerns heightened.

The 00z model suite continues to advertise another pattern shift next week. The blocking pattern is short lived as an upper level trough moves into the west coast. Confidence on precip chances continues to remain low, but one thing that is more certain is widespread cooling. Current forecast will bring temperatures down by Monday with increasing clouds and a low chance for precip across the north bay. Aviation As of 10:00 pm pdt Tuesday... Satellite image shows areas of stratus over the waters. Stratus is filling mry bay and should spread into mry and sns. Latest NAM guidance shows cigs into sfo and oak early morning so have added that into the tafs. Vicinity of ksfo... Occasional MVFR CIGS between 12z and 16z. Sfo bridge approach... Similar to ksfo. Monterey bay terminals... Ifr CIGS after 07z clearing after 17z. Marine As of 09:33 pm pdt Tuesday... High pressure over the eastern pacific coupled with a thermal trough along the coast will maintain light northwest winds through Sunday. A long period northwest swell will arrive on Wednesday bringing an increased risk of rip currents and sneaker waves. Swell period will decrease Wednesday night and Thursday. Mtr watches warnings advisories Tday None. Public forecast: mm aviation: W pi marine: W pi visit us at

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
FTPC1 - 9414290 - San Francisco, CA	2 mi	36 min	SW 5.1 G 7		61°F		1018.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA	3 mi	36 min	WSW 5.1 G 9.9	55°F			1017.1 hPa
PXSC1	3 mi	36 min		57°F				55°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA	4 mi	43 min	W 2.9	54°F			1018 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA	6 mi	36 min	WNW 4.1 G 6	56°F			1018.2 hPa
OBXC1	6 mi	36 min		56°F				54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	6 mi	36 min	WNW 2.9 G 5.1
RCMC1 - 9414863 - Richmond, CA	7 mi	36 min	WSW 4.1 G 6		63°F		1018 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA	7 mi	48 min	SSW 8.9 G 12	57°F			1018.3 hPa
AAMC1 - 9414750 - Alameda, CA	8 mi	36 min	WNW 5.1 G 6		64°F		1018.4 hPa
LNDC1	9 mi	36 min	W 1.9 G 4.1	56°F			1018.1 hPa
46237 - San Francisco Bar, CA (142)	11 mi	54 min			59°F	3 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA	18 mi	36 min	WSW 7 G 11	57°F			1017.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA	22 mi	36 min	WNW 9.9 G 12	57°F	64°F		1017.7 hPa	57°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA	22 mi	34 min	WNW 9.7 G 12	56°F	58°F	3 ft	1018.7 hPa
RTYC1 - 9414523 - Redwood City, CA	25 mi	36 min	SSW 1.9 G 1.9	54°F	67°F		1018.7 hPa
PCOC1 - 9415144 - Port Chicago, CA	26 mi	36 min	WSW 9.9 G 12	57°F	64°F		1017.6 hPa
PRYC1 - 9415020 - Point Reyes, CA	31 mi	36 min	W 4.1 G 7		59°F		1017.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA	33 mi	36 min	WNW 7 G 8	58°F			1017.2 hPa
SFXC1 - San Francisco Bay Reserve, CA	34 mi	99 min	W 2.9	55°F			1017 hPa

Wind History for San Francisco, CA

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SW3

SW2

SW5

SW3 G6

SW2

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NW4

W8 G13

W8 G12

W10 G14

SW11 G14

W11 G17

SW12 G22

W12 G18

W11 G19

SW11 G16

SW6 G10

SW2 G10

SW5 G13

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SW4 G9

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1 day ago

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NE9

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E8 G11

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SW11 G14

W8 G13

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2 days ago

W3 G6

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W7 G13

W8 G14

W10 G16

W9 G14

SW10 G17

SW12 G18

SW7 G11

SW13 G20

SW6 G13

SW5 G15

SW4

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NW1

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S6

S2

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
San Francisco, San Francisco International Airport, CA	15 mi	28 min	WNW 9	10.00 mi	A Few Clouds	53°F	50°F	89%	1018 hPa
Oakland, Metro Oakland International Airport, CA	15 mi	31 min	NW 5	10.00 mi	A Few Clouds	54°F	52°F	93%	1018.2 hPa
Hayward, Hayward Air Terminal, CA	21 mi	30 min	ENE 3	10.00 mi	Fair	53°F	44°F	72%	1019 hPa
Novato / Gnoss Field, CA	23 mi	29 min	N 0	10.00 mi	Mostly Cloudy	46°F	42°F	87%	1017.9 hPa
San Carlos Airport, CA	23 mi	29 min	N 0	10.00 mi	Fair	54°F	48°F	82%	1018.3 hPa
Concord, Buchanan Field, CA	23 mi	31 min	N 0	10.00 mi	Fair	52°F	44°F	75%	1016.4 hPa

Wind History from SFO (wind in knots)

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SW5

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1 day ago

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N4

W12

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2 days ago

W3

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NE4

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NW8

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NW12

W17

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W15

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W11

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S3

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NE13

E9

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Tide / Current Tables for Alcatraz Island, San Francisco Bay, California

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Tide / Current Tables for Alcatraz Island W, San Francisco Bay, California Current

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Weather Map and Satellite Images

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GOES 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

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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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Disclaimer: 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.