Wednesday, May24, 2017 L-36.com


Marine Weather and Tides
Belvedere, CA

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:50AMSunset 8:22PM Wednesday May 24, 2017 6:23 AM PDT (13:23 UTC) Moonrise 4:20AMMoonset 6:12PM Illumination 1% Phase: Waning Crescent; Moon at 28 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 San Francisco Bay North Of The Bay Bridge- 309 Am Pdt Wed May 24 2017
.small craft advisory in effect from 9 am pdt this morning through this evening...
.small craft advisory in effect from Thursday afternoon through late Thursday night...
Today..SW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Tonight..SW winds 10 to 20 kt. Patchy fog after midnight.
Thu..SW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Thu night..SW winds 15 to 25 kt.
Fri..SW winds 10 to 20 kt.
Sat..SW winds 5 to 15 kt.
Sun..SW winds 10 kt.
PZZ500 309 Am Pdt Wed May 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Increasing southerly winds along the coast today. Surface high pressure bringing northerly winds further offshore north of point reyes. A small northwest swell moves through the water this week.

7 Day Forecast for Marine Location Near Belvedere, CA
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location: 37.83, -122.44     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 241131
afdmtr
area forecast discussion
national weather service san francisco bay area
431 am pdt Wed may 24 2017

Synopsis A cooling trend can be expected through Friday as
high pressure weakens and the marine influence increases. Minor
warming is then expected during the upcoming weekend into early
next week as high pressure returns to the west coast.

Discussion As of 3:30 am pdt Wednesday... Another round of
widespread clouds at the coast plus through most of the salinas
valley and into much of san francisco bay. Marine layer continues
to be around 1,500 feet along with a moderate onshore flow (sfo-
sac gradient over 3 mb) at the surface. Clouds will burn-off
toward the coast later this morning although similar to the past
few days, some locals beaches will not see any sunshine.

Biggest change compared to yesterday will be cooler conditions
inland as an upper level low and associated longwave trough
continue to dive southward into the northern rockies. Highs will
only be in the 70s to the lower 80s for inland locations with
upper 50s to upper 60s closer to the coast. The influx of cooler
air will lead to breezy conditions during the afternoon. Another
round of coastal clouds can be expected tonight.

Additional inland cooling is forecast for Thursday and Friday as
the trough dives farther to the south. Far inland spots will
struggle to get into the 70s while coastal areas will be in the
mid 50s to the mid 60s.

A ridge of high pressure will rebuild across our region starting
on Saturday and continuing at least into Monday. Many inland
locations will return to the upper 70s to around 90. Clouds along
with a continued onshore flow will keep towns near the coast
considerably cooler.

No sign of rainfall through the first week of june.

Aviation As of 4:30 am pdt Wednesday... Deep stratus intrusion
this morning, bringing widespread vlifr to ifr CIGS to most taf
sites. Generally speaking, marine layer is both deeper and has
lower ceilings this morning and will take longer to mix out today
versus yesterday. Some locations, ie along immediate coast such as
khaf and kmry will likely remain ovc010 or less through the entire
day. Otherwise, increasing west to southwest winds along the
coast becoming breezy to occasionally gusty in the
afternoon evening.

Vicinity of ksfo... Ifr to MVFR CIGS thru the mid morning, mixing
out toVFR between 18-19z. Tower will have better conditions than
the bridge which could impact approach until late morning. W-sw
winds up to 15kt with gusts to the low 20kts.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Stratus through the day along the coast,
with mixing out by mid to late morning further inland. Breezy
southwest winds through the afternoon and evening. Ceilings down
to 200-300 ft this morning tonight.

Marine As of 04:25 am pdt Wednesday... Increasing southerly
winds along the coast today. Surface high pressure bringing
northerly winds further offshore north of point reyes. A small
northwest swell moves through the water this week.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
sca... Sf bay from 9 am
public forecast: bell
aviation: drp
marine: drp
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
FTPC1 - 9414290 - San Francisco, CA 2 mi54 min SSW 5.1 G 9.9 50°F 54°F1012 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 3 mi60 min W 7 G 13 51°F 1010.8 hPa
PXSC1 3 mi54 min 51°F 51°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 4 mi62 min WNW 6 51°F 1012 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 6 mi54 min WSW 6 G 8.9 52°F 1011.9 hPa
OBXC1 6 mi54 min 52°F 51°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 6 mi54 min SW 8 G 9.9
RCMC1 - 9414863 - Richmond, CA 7 mi54 min SSW 6 G 8.9 52°F 59°F1011.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 7 mi54 min SSW 7 G 9.9 53°F 1011.8 hPa
AAMC1 - 9414750 - Alameda, CA 8 mi54 min W 5.1 G 8 53°F 65°F1012.2 hPa
LNDC1 9 mi54 min WSW 7 G 9.9 52°F 1011.8 hPa
46237 - San Francisco Bar, CA (142) 11 mi54 min 53°F4 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi54 min SW 14 G 17 54°F 1010.7 hPa
UPBC1 22 mi54 min W 21 G 25
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi94 min SW 3.9 G 5.8 51°F 54°F4 ft1012.3 hPa (-1.0)
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi54 min WSW 16 G 20 53°F 64°F1010.9 hPa53°F
RTYC1 - 9414523 - Redwood City, CA 25 mi54 min WNW 6 G 7 55°F 70°F1011.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 26 mi54 min WSW 13 G 19 53°F 65°F1010.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 31 mi54 min W 2.9 G 4.1 54°F 57°F1011.2 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi54 min WNW 17 G 23 55°F 1008.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi99 min WNW 8.9 53°F 1010 hPa51°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi94 min W 3.9 G 7.8 52°F 53°F4 ft1011.9 hPa (-1.2)

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA15 mi88 minW 810.00 miOvercast54°F48°F83%1011.8 hPa
Oakland, Metro Oakland International Airport, CA15 mi31 minW 510.00 miOvercast55°F51°F87%1011.7 hPa
Hayward, Hayward Air Terminal, CA21 mi30 minW 610.00 miOvercast56°F48°F75%1012.5 hPa
Half Moon Bay Airport, CA22 mi29 minN 07.00 miOvercast50°F48°F94%1012.2 hPa
Novato / Gnoss Field, CA23 mi49 minSW 410.00 miOvercast54°F50°F88%1011.5 hPa
San Carlos Airport, CA23 mi34 minNW 310.00 miOvercast55°F50°F82%1011.5 hPa
Concord, Buchanan Field, CA23 mi31 minWSW 410.00 miMostly Cloudy54°F50°F87%1009.3 hPa

Wind History from SFO (wind in knots)
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Last 24hrW5SW3NW8NW9NW11NW10NW14NW19W22NW20NW20W19W20W17W15W13W13NW11W10W9W10W7W8W6
1 day agoNW6NW7NW7NE6NE4NW9NW13NW14NW17NW18W19
G25
W21W20NW18W14NW11W10W8W7W10NW11W10W9W7
2 days agoW6NW6CalmN5N5NW8NW10NW15W18W17W20W18W17NW17NW17W15NW13W13W11NW9NW9W7W10NW8

Tide / Current Tables for Alcatraz Island, San Francisco Bay, California
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Alcatraz Island
Click for Map
Wed -- 05:17 AM PDT     -0.82 feet Low Tide
Wed -- 05:19 AM PDT     Moonrise
Wed -- 05:52 AM PDT     Sunrise
Wed -- 12:04 PM PDT     4.77 feet High Tide
Wed -- 05:05 PM PDT     1.46 feet Low Tide
Wed -- 07:11 PM PDT     Moonset
Wed -- 08:20 PM PDT     Sunset
Wed -- 11:25 PM PDT     6.56 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.74.52.81.1-0.2-0.8-0.60.11.22.43.54.44.84.53.72.71.81.51.72.53.74.95.96.5

Tide / Current Tables for Alcatraz Island W, San Francisco Bay, California Current
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Alcatraz Island W
Click for Map
Wed -- 12:13 AM PDT     -0.01 knots Slack
Wed -- 03:16 AM PDT     -3.22 knots Max Ebb
Wed -- 05:19 AM PDT     Moonrise
Wed -- 05:52 AM PDT     Sunrise
Wed -- 06:45 AM PDT     0.00 knots Slack
Wed -- 09:49 AM PDT     3.49 knots Max Flood
Wed -- 01:23 PM PDT     -0.01 knots Slack
Wed -- 03:45 PM PDT     -2.10 knots Max Ebb
Wed -- 06:42 PM PDT     0.00 knots Slack
Wed -- 07:11 PM PDT     Moonset
Wed -- 08:20 PM PDT     Sunset
Wed -- 09:42 PM PDT     2.98 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.3-1.1-2.5-3.2-3-2.2-1.10.42.13.23.53.12.10.6-0.9-1.9-2.1-1.6-0.70.41.82.82.92.4

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (9,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, CA
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weather_mapweather_map weather_map

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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.