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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 6:57AM

Sunset 5:49PM

Friday February 15, 2019 11:52 AM PST (19:52 UTC)

Moonrise 1:37PM

Moonset 3:31AM

Illumination 85%

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 151759 afdmtr area forecast discussion national weather service san francisco bay area 959 am pst Fri feb 15 2019 Synopsis Cool and showery conditions are expected today through the weekend as a cold upper trough digs south along the west coast. Snow levels will lower Friday into Saturday with the potential for accumulating snowfall in the region's highest peaks. Overnight temperatures will turn much colder by early next week as dry weather develops and skies clear. Unsettled conditions could return for the latter half of next week. Discussion As of 09:11 am pst Friday... No major changes to the forecast this morning as isolated to scattered showers continue to move inland across the region. As expected, numerous reports of very small hail are being reported region-wide as cold air advection continues aloft. This too has resulted in lowering snow levels with air temperature below freezing in the region's highest peaks. Thus, cannot rule out snow showers in those higher elevations. Showers will persist as a reinforcing colder mid upper level trough descends southward along the west coast through the weekend. This too will lower snow levels with increasing chances for accumulating snowfall in elevations above 2,500-3,000 feet while rain showers persist off and on across the region. Will have additional updates and details with respect the forecast for the remainder of the weekend this afternoon. Until then, please see the previous forecast discussion below. Prev discussion As of 2:53 am pst Friday... A line of showers moved through the district earlier producing brief, heavy rain as it passed. This line was associated with a cold front that has moved through. Scattered showers are expected to persist today through the weekend as the area remains in a cold, unstable airmass. Temperatures have dropped considerably with the passage of the cold front. Current readings at area airports are generally 15 degrees colder than they were 24 hours ago with mid to upper 40s being reported. At higher elevations, automated weather stations are picking up current temperatures in the 30s and lower 40s. Snow levels are forecast to drop as low as 2500 feet today and perhaps below 2000 feet by late Saturday night. Thus, snowfall is likely on bay area peaks and accumulating snowfall is likely above 3000 feet. Also, small hail is likely at times with heavier showers. Flood waters continue to recede in most areas. The flood warning for the carmel river was cancelled last night, however, water levels on the lower russian river continue to rise and is forecast to crest within the next hour or two. A flood warning remains in effect for the russian river near guerneville. Drier weather is forecast to return by the beginning of the week.

Clearing skies will result in cold overnight temperatures. Unsettled weather is possible by midweek. Aviation As of 9:59 am pst Friday... Showers will continue across area terminals today in the cold post frontal environment. Vfr except MVFR in heavy showers, steadily lowering freezing levels with snow at highest elevations through the weekend. Deeper layer cooling arrives from the north later today, 500 mb temperatures exceeding -30 celsius into tonight. Steepening temperature lapse rates initiating isolated thunderstorms favoring the bay area by late afternoon and evening, convective potential up to several hundred j kg; will amend to add thunderstorms in tafs as needed. Generally much less wind today, though occasionally gusts to 20-25 knots nearest showers or isolated thunderstorms are possible. Vicinity of ksfo...VFR, gusty wind to 20-25 knots today. Showers today tempo MVFR in showers mid to late evening. Sfo bridge approach... Similar to sfo. Monterey bay terminals...VFR except MVFR in showers particularly this morning. SE wind becoming onshore and locally gusty to 20 knots by late morning. More showers arriving tonight and Saturday morning. Beaches 25 feet swell with moderate period 16 seconds reported from buoy 59 located 400 miles northwest of the bay area. Large, dangerous surf will reach the coastal waters today, a high surf advisory begins 10 am today continuing to 9 pm Saturday. Northwest swell 14 to 17 feet will produce breakers as high as 18 to 25 feet along west and northwest facing beaches. High surf will also bring coastal flooding impacts during high tide today. A coastal flood advisory is in effect 5 am to 10 am this morning. Marine As of 09:42 am pst Friday... Cooler temperatures, gusty west to northwest winds, scattered showers and possibly a few thunderstorms will continue into the weekend. A large northwest swell will arrive across the waters today and continue into the weekend. Mtr watches warnings advisories Tday High surf advisory... Caz006-505-509-529-530 coastal flood advisory... Caz006-505-506-508-509-529-530 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 pinos to pt piedras blancas 0-10 nm sca... Pt arena to pigeon pt 10-60 nm sca... Pigeon pt to pt piedras blancas 10-60 nm sca... Rough bar advisory for sf bar sca... Sf bay sca... Mry bay public forecast: rgass sims aviation: cw marine: cw 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	40 min	WSW 1.9 G 12	52°F	54°F		1016.1 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA	3 mi	34 min	WSW 5.1 G 13	53°F			1014.7 hPa
PXSC1	3 mi	34 min		53°F				41°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA	4 mi	53 min	NE 1.9	52°F			1016 hPa
OBXC1	6 mi	34 min		52°F				41°F
OKXC1 - 9414776 - Oakland (Berth 34), CA	6 mi	34 min	SW 12 G 20	52°F			1015.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	6 mi	34 min	SW 16 G 26
PPXC1 - 9414847 - Richmond (Point Potrero), CA	7 mi	34 min	WSW 11 G 17	53°F			1015.8 hPa
RCMC1 - 9414863 - Richmond, CA	7 mi	34 min			53°F
AAMC1 - 9414750 - Alameda, CA	8 mi	40 min	WSW 15 G 19	51°F	52°F		1016.4 hPa
LNDC1	9 mi	34 min	SW 11 G 22	52°F			1015.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA	18 mi	34 min	W 7 G 12	51°F			1015.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA	22 mi	32 min	W 18 G 23	52°F	55°F		1016.4 hPa
UPBC1	22 mi	34 min	WSW 12 G 21
MZXC1 - 9415102 - Martinez-Amorco CA	22 mi	34 min	SW 13 G 18	51°F	51°F		1015.3 hPa	46°F
RTYC1 - 9414523 - Redwood City, CA	25 mi	34 min	S 8 G 13	52°F	53°F		1016.8 hPa
PCOC1 - 9415144 - Port Chicago, CA	26 mi	34 min	SW 11 G 18	51°F	50°F		1015.6 hPa
PRYC1 - 9415020 - Point Reyes, CA	31 mi	34 min			55°F		1015.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA	33 mi	34 min	WSW 5.1 G 7	51°F			1015.4 hPa
SFXC1 - San Francisco Bay Reserve, CA	34 mi	67 min	WNW 8.9	45°F			1015 hPa	41°F

Wind History for San Francisco, CA

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6 PM

7 PM

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Last 24hr

SW4

SW4 G8

W10 G16

W10 G20

S2 G12

SW10 G16

SW10 G19

SW8 G17

SW10 G17

SW9 G16

SW8 G11

SW8 G14

W6 G18

W6 G15

SE3 G6

W6 G12

S6 G9

SW4 G8

SW5 G10

S8 G11

SW7 G14

SW8 G13

W5 G11

1 day ago

SE8 G11

NE5 G9

E6

SE6 G9

S10 G23

S10 G16

SE6 G10

SE9 G13

S8 G15

SE10 G21

SE8 G12

SE10 G15

SE11 G14

SE11 G18

SE10 G15

S11 G23

S12 G27

SE9 G25

SW15 G23

SW10 G15

SW7 G16

SW5 G10

S7 G11

W5 G11

2 days ago

SE5

E6

SE5

N7

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N8 G11

N9 G12

E5

N2

SE4 G7

SE1

E2

E5

SE5 G10

NE2

E4 G11

SE8 G12

SE6 G10

E9 G17

E12 G16

E8 G12

E5 G10

N12

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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	59 min	SW 15	10.00 mi	Mostly Cloudy	54°F	39°F	59%	1016.3 hPa
San Francisco, San Francisco International Airport, CA	15 mi	56 min	SW 20 G 25	9.00 mi	Light Rain and Breezy	53°F	42°F	66%	1015.8 hPa
Hayward, Hayward Air Terminal, CA	21 mi	58 min	SSW 11	10.00 mi	Mostly Cloudy	53°F	41°F	64%	1017 hPa
Concord, Buchanan Field, CA	23 mi	59 min	SW 14	10.00 mi	Partly Cloudy	53°F	39°F	59%	1014.1 hPa
San Carlos Airport, CA	23 mi	65 min	SSW 8	5.00 mi	Light Rain	50°F	39°F	67%	1015.9 hPa
Novato / Gnoss Field, CA	23 mi	57 min	W 14 G 27	1.50 mi	Rain	45°F	41°F	87%	1016.3 hPa

Wind History from SFO (wind in knots)

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W8

W14 G17

W19 G24

W17 G24

SW16 G21

SW11

SW13

SW20 G28

SW14 G23

S14 G23

SW20 G28

SW10

SW14

SW15

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W23 G28

SW11

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SW14 G21

SW20 G25

1 day ago

SE7

SE10

S25 G40

S24 G33

SE10 G24

SE6

E8

SE8

S14 G27

SE7

SE16

SE13

SE22 G29

S27 G35

S22 G34

S33 G46

S36 G54

S30 G45

SW26 G33

SW22 G31

SW11 G17

S13

SW11 G17

W11

2 days ago

Calm

Calm

E9

SE7

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SE12

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E17

E10

SE13 G20

SE22 G27

SE18 G28

SE21

E17

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E15

E11

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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 (14,3,4,5)

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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.