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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 6:26AM

Sunset 7:51PM

Saturday April 20, 2019 2:03 AM PDT (09:03 UTC)

Moonrise 8:29PM

Moonset 6:34AM

Illumination 99%

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 200549 afdmtr area forecast discussion national weather service san francisco bay area 1049 pm pdt Fri apr 19 2019 Synopsis A pair of upper lows will impact california through the next 24 hours bringing a cooling moistening trend, a slight chance of drizzle along the coast overnight, and increased onshore flow through tomorrow. A renewed warming trend appears in store for the first part of next week. Discussion As of 9:38 pm pdt Friday... An approaching upper level trough, deepening marine layer and increased onshore flow resulted in cooler temperatures across the district today. High temperatures ranged from the lower to mid 60s at the coast, to the 70s to mid 80s inland. Temperatures were generally 2-12 degrees cooler than yesterday, but some near-coastal sites were as many as 17 degrees cooler. The onshore surface pressure gradient has tightened to 3.4 mb between sfo and sac, up from just 0.7 mb 24 hours ago. Also, the fort ord profiler indicates that the marine layer has ramped up to nearly 2000 feet. Although there are a lot of high and mid-level clouds streaming over northern california, ir satellite imagery does indicate coastal stratus has already spread well into inland valleys even now. Updated the short term to increase clouds overnight. The approaching upper level trough will bring another cool day to the area Saturday, along with possible coastal drizzle developing later in the day and overnight. High pressure is forecast to begin edging eastward towards california beginning on Sunday. This will usher in a warming trend for early next week. A weaker upper trough is progged to move across northern california later next week for a slight cool down. Aviation As of 10:40 pm pdt Friday... Approaching upper trough

from the northwest has increased the onshore gradient and deepened the marine layer. Ft ord profiler shows the marine layer has deepened steadily this evening and is now at 2000 feet. Stratus has already spread into the sfo and mry bay area. CIGS are ifr initially but should lift into the MVFR range later tonight as the marine layer continues to deepen. Cannot rule out patchy drizzle as well early Wednesday morning. Late clearing expected in the sfo bay area Saturday while the mry bay area may not see any clearing at all. Winds become gusty during the day Saturday with gusts up to 25 kt. Vicinity of ksfo... Ifr CIGS lifting to MVFR after 10z. Possible drizzle with reduced vsbys to 5-6 miles after 12z. Clearing late in the morning Saturday with westerly winds gradually increasing on Saturday. Gusts to 25-28 kt Saturday afternoon. Sfo bridge approach... Similar to ksfo. Monterey bay terminals... Ifr CIGS lifting to MVFR after 16z. Some afternoon clearing is possible at sns but mry is expected to remain MVFR all day Saturday. Marine As of 10:37 pm pdt Friday... Northwest winds will increase over the northern and central waters as and near the coast today through Saturday as low pressure develops over the interior. A moderate northwest swell will also prevail through the weekend. Mtr watches warnings advisories Tngt Sca... Pt arena to pt reyes 0-10 nm sca... Pt reyes to pigeon pt 0-10 nm sca... Pt pinos to pt piedras blancas 0-10 nm sca... Pt arena to pigeon pt 10-60 nm public forecast: sims 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	46 min	WSW 12 G 17				1012.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA	3 mi	46 min	WSW 8.9 G 15	52°F			1011.8 hPa
PXSC1	3 mi	46 min		53°F				53°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA	4 mi	53 min	SW 6	53°F			1012 hPa
OBXC1	6 mi	46 min		53°F				53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA	6 mi	46 min	WSW 7 G 11	53°F			1013.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	6 mi	46 min	SW 16 G 19
PPXC1 - 9414847 - Richmond (Point Potrero), CA	7 mi	46 min		56°F			1012.6 hPa
RCMC1 - 9414863 - Richmond, CA	7 mi	46 min	SW 1.9 G 4.1				1012.1 hPa
AAMC1 - 9414750 - Alameda, CA	8 mi	46 min	W 8.9 G 11				1013.6 hPa
LNDC1	9 mi	46 min	WSW 7 G 12	54°F			1013.1 hPa
46237 - San Francisco Bar, CA (142)	11 mi	64 min			54°F	7 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA	18 mi	46 min	SW 14 G 17	55°F			1011.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA	22 mi	34 min	NW 16 G 18	52°F	52°F		1013.5 hPa
UPBC1	22 mi	46 min	W 5.1 G 8.9
MZXC1 - 9415102 - Martinez-Amorco CA	22 mi	46 min	W 7 G 8.9	56°F	61°F		1011.5 hPa	56°F
RTYC1 - 9414523 - Redwood City, CA	25 mi	46 min	W 9.9 G 13	55°F	67°F		1013.8 hPa
PCOC1 - 9415144 - Port Chicago, CA	26 mi	46 min	SSW 9.9 G 15	55°F	61°F		1011.3 hPa
PRYC1 - 9415020 - Point Reyes, CA	31 mi	46 min			55°F		1012.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA	33 mi	46 min	W 13 G 19	58°F			1010.1 hPa
SFXC1 - San Francisco Bay Reserve, CA	34 mi	79 min	W 7	55°F			1011 hPa	51°F

Wind History for San Francisco, CA

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S3 G10

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SW6 G15

W5 G11

SW6 G14

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W10 G15

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SW12 G18

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SW12 G18

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Oakland, Metro Oakland International Airport, CA	15 mi	71 min	W 11	10.00 mi	Overcast	55°F	50°F	83%	1013.5 hPa
San Francisco, San Francisco International Airport, CA	15 mi	68 min	W 11	8.00 mi	Overcast	53°F	50°F	89%	1013.1 hPa
Hayward, Hayward Air Terminal, CA	21 mi	70 min	W 9	10.00 mi	Overcast	55°F	50°F	83%	1014.3 hPa
Half Moon Bay Airport, CA	22 mi	64 min	NW 8	1.25 mi	Light Rain	54°F	51°F	94%	1014.2 hPa
Concord, Buchanan Field, CA	23 mi	71 min	S 11 G 20	10.00 mi	Fair	56°F	48°F	77%	1010 hPa
San Carlos Airport, CA	23 mi	69 min	WNW 10	10.00 mi	Partly Cloudy	55°F	50°F	82%	1013.5 hPa
Novato / Gnoss Field, CA	23 mi	69 min	N 0	10.00 mi	A Few Clouds	54°F	51°F	94%	1012.2 hPa

Wind History from SFO (wind in knots)

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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 (5,6,7,8)

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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.