Thursday, May24, 2018 L-36.com


Marine Weather and Tides
Sausalito, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:51AMSunset 8:22PM Thursday May 24, 2018 2:43 PM PDT (21:43 UTC) Moonrise 2:38PMMoonset 2:24AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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- 224 Pm Pdt Thu May 24 2018
.small craft advisory in effect until 10 pm pdt this evening...
Tonight..W to sw winds 15 to 25 kt...decreasing to 5 to 15 kt overnight. Slight chance of showers after midnight.
Fri..SW winds 5 to 15 kt. Chance of showers.
Fri night..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
Sat night..W winds 10 to 20 kt.
Sun..SW winds 5 to 15 kt.
Memorial day..SW winds 10 kt.
Tue..SW winds 10 kt.
PZZ500 224 Pm Pdt Thu May 24 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure near the coast will keep light to moderate winds over the coastal waters. Gusty winds will be possible this evening north of the bay bridge inside the san francisco bay. Northwest winds increase Friday. Gusty winds will impact the coastal waters this holiday weekend. Mixed seas with a longer period southwest swell and a smaller northwest swell.

7 Day Forecast for Marine Location Near Sausalito, CA
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location: 37.8, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 242037
afdmtr
area forecast discussion
national weather service san francisco bay area
137 pm pdt Thu may 24 2018

Synopsis Cloudy and cool today with increasing chance of
showers tonight into Friday as a late season low passes over the
region. Shower chances end by early Saturday morning. High
pressure builds Sunday through Tuesday with a noted warming and
drying trend.

Discussion As of 1:38 pm pdt Thursday... Overcast conditions
continue to dominate much of the central california coast and san
francisco bay area this early afternoon. The marine stratus
earlier today managed to push well inland to the santa clara-
merced county line at pacheco pass, and south through monterey
county up to the monterey-fresno and monterey-kings county lines.

The healthy marine layer is responding to an approaching upper
level low that will be the main weather story for our region over
the next day or two as it approaches the california coast.

Temperatures this afternoon will remain rather cool for much of
the area blanketed under the clouds. Highs will be in 50s to 60s
along the coast, and 60s to low 70s for interior locations.

Overnight tonight, the aforementioned upper level low will be
within a few hundred miles of the central california coast. As the
low moves eastward, precipitation chances will increase later
tonight and into the day on Friday. Not expecting a widespread
washout by any means, but more or less scattered shower activity.

In terms of convective thunder potential, models are suggesting
some minimal surface-based and mid-level instability with a
notable downward trend from model run-to-run. The latest day 2
storm prediction center convective outlook has actually backed off
on the general thunder area over parts of the state, which
previously had included parts of the north bay. It's still a non-
zero chance, but not looking as likely as earlier. Nonetheless,
the main impacts expected will be wet roadways from the scattered
showers that may impact the Friday commutes. With the scattered
nature of the showers, total rain amounts are expected to remain
light overall with amounts reaching a tenth of an inch or locally
a quarter of an inch for the higher elevations.

Rain chances will begin to diminish overnight Friday and into
Saturday, though can't rule out lingering showers -- particularly
in the north bay -- through midday Saturday. Temperatures will
begin rebounding back toward seasonal normals with noticeable
warming for the interior from Saturday to Sunday. Highs will
likely reach the mid 70s to 80s for the interior by Sunday with
additional warming for Monday as a ridge builds over the eastern
pacific. Can't rule out the potential for some 90s by memorial day
for the interior. Overall it should be a very nice holiday
weekend weather-wise by Sunday and Monday with some clearing even
reaching the beaches. Any beachgoers should always be mindful of
the hazards the pacific ocean presents year-round, including the
cold water temperatures and rip current risks. Always be aware of
your surroundings, and never turn your back to the ocean.

As the ridge shifts inland by Tuesday and Wednesday next week,
temperatures will likely begin a gradual cooling trend. By this
time next week models advertise a trough developing over the west
coast, which would help to reinforce a downward trend in afternoon
highs.

Aviation As of 10:39 am pdt Thursday... Based on latest
satellite trends, webcams and hi-res models forecast will be more
pessimistic than previous forecast. Widespread clouds blanket the
bay area with very slow clearing on the edges. Therefore, put
forecast toward an all day event with MVFR cigs. The next
challenge will be any clearing lifting tonight with approaching
low. Hit or miss showers will develop and impact tonight into
early tomorrow. Vcsh for now given uncertainty.

Overall confidence is medium to low.

Vicinity of ksfo... Decided on an all day stratus event. There
could be some lifting above 2500 feet later today, but will keep
at least bkn in forecast. Vcsh later today and tonight poss.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS through the period. Vcsh poss
tonight.

Marine As of 10:33 am pdt Thursday... Light to locally moderate
winds over the coastal waters today as high pressure remains off
the immediate coast. The strongest winds today will be located in
the northern san francisco bay. Northwest winds pick up by mid
day tomorrow and become locally moderate by tomorrow night
through the upcoming weekend. Mixed seas with a longer period
southwest swell and a smaller northwest swell. Increasing winds
later this weekend will bring locally steep fresh swell.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 10 pm
public forecast: rowe
aviation: mm
marine: mm
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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 mi73 min WSW 8 G 11 56°F 56°F1018.7 hPa
PXSC1 5 mi73 min 58°F 50°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 6 mi73 min W 6 G 8.9 57°F 1017.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 7 mi80 min WSW 4.1 56°F 1019 hPa
46237 - San Francisco Bar, CA (142) 7 mi103 min 55°F5 ft
OBXC1 8 mi73 min 56°F 50°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 9 mi73 min W 5.1 G 7 57°F 1018.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 9 mi73 min WSW 8.9 G 11
RCMC1 - 9414863 - Richmond, CA 10 mi73 min S 6 G 9.9 56°F 59°F1018.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 10 mi73 min SSW 7 G 11 56°F 1018.6 hPa
AAMC1 - 9414750 - Alameda, CA 11 mi73 min W 7 G 9.9 57°F 62°F1018.5 hPa
LNDC1 12 mi73 min W 7 G 9.9 57°F 1018.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 18 mi73 min SSW 5.8 G 7.8 54°F 54°F1019.2 hPa53°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 22 mi73 min SW 11 G 16 58°F 1017.5 hPa
RTYC1 - 9414523 - Redwood City, CA 25 mi73 min WSW 5.1 G 7 57°F 64°F1018.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 26 mi73 min SW 14 G 19 58°F 64°F1017.6 hPa53°F
PRYC1 - 9415020 - Point Reyes, CA 29 mi73 min SSE 2.9 G 7 53°F1018.2 hPa
PCOC1 - 9415144 - Port Chicago, CA 30 mi73 min WSW 13 G 19 60°F 64°F1017.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 36 mi79 min WNW 13 G 19 62°F 1016.5 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 36 mi113 min SE 3.9 G 5.8 55°F 55°F6 ft1018.3 hPa (+0.7)
SFXC1 - San Francisco Bay Reserve, CA 37 mi118 min W 14 64°F 1017 hPa52°F

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, CA14 mi47 minW 810.00 miMostly Cloudy63°F46°F56%1018 hPa
Oakland, Metro Oakland International Airport, CA16 mi50 minW 810.00 miOvercast59°F48°F67%1018.2 hPa
Half Moon Bay Airport, CA20 mi48 minSSW 610.00 miOvercast57°F50°F77%1019 hPa
Hayward, Hayward Air Terminal, CA22 mi49 minWNW 710.00 miMostly Cloudy60°F48°F65%1019 hPa
San Carlos Airport, CA23 mi56 minWSW 610.00 miOvercast61°F48°F63%1018.3 hPa
Novato / Gnoss Field, CA24 mi48 minSW 8 G 1410.00 miOvercast63°F50°F64%1017.6 hPa

Wind History from SFO (wind in knots)
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Last 24hrW14W17W15
G21
W14W12W13W8W8W7W7W105SW7W7W7SW4SW6SW7SW3SE5W4W11W11W8
1 day agoSW13W15W14W12W11W11W8SW6SW7SW6SW6SW5SW4W6W5SW4SW4SW5W5W8W11W12W11W11
2 days agoW21W22
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Tide / Current Tables for San Francisco, California
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San Francisco
Click for Map
Thu -- 02:35 AM PDT     1.23 feet Low Tide
Thu -- 03:24 AM PDT     Moonset
Thu -- 05:53 AM PDT     Sunrise
Thu -- 08:32 AM PDT     4.37 feet High Tide
Thu -- 02:19 PM PDT     0.57 feet Low Tide
Thu -- 03:37 PM PDT     Moonrise
Thu -- 08:20 PM PDT     Sunset
Thu -- 09:17 PM PDT     5.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.81.91.31.31.62.33.13.84.34.33.82.91.910.60.71.32.23.34.45.35.85.74.9

Tide / Current Tables for San Francisco Bay Entrance (Golden Gate), California Current
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San Francisco Bay Entrance (Golden Gate)
Click for Map
Thu -- 01:10 AM PDT     -3.18 knots Max Ebb
Thu -- 03:24 AM PDT     Moonset
Thu -- 04:46 AM PDT     0.00 knots Slack
Thu -- 05:53 AM PDT     Sunrise
Thu -- 07:41 AM PDT     2.69 knots Max Flood
Thu -- 10:21 AM PDT     -0.00 knots Slack
Thu -- 01:14 PM PDT     -3.12 knots Max Ebb
Thu -- 03:37 PM PDT     Moonrise
Thu -- 04:48 PM PDT     0.01 knots Slack
Thu -- 07:58 PM PDT     3.45 knots Max Flood
Thu -- 08:20 PM PDT     Sunset
Thu -- 10:52 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.8-3.2-3.1-2.5-1.30.41.82.52.72.10.6-1.2-2.6-3.1-3-2.4-1.30.323.13.431.7-0.3

Weather Map and Satellite Images
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wmap_P
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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (17,4,5,8)
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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.