Friday, August18, 2017 L-36.com


Marine Weather and Tides
Marin City, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 6:26AMSunset 8:00PM Thursday August 17, 2017 11:47 PM PDT (06:47 UTC) Moonrise 1:07AMMoonset 3:46PM Illumination 17% Phase: Waning Crescent; Moon at 26 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- 856 Pm Pdt Thu Aug 17 2017
Tonight..SW winds 10 to 20 kt.
Fri..SW winds 10 to 20 kt.
Fri night..SW winds 10 to 20 kt.
Sat..SW winds 10 to 20 kt.
Sat night..SW winds 10 to 20 kt. Patchy fog after midnight.
Sun..SW winds 10 to 20 kt...decreasing to 10 kt.
Mon..SW winds 5 kt...increasing to 5 to 15 kt.
Tue..SW winds 5 kt...increasing to 5 to 15 kt.
PZZ500 856 Pm Pdt Thu Aug 17 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A 1027 mb high is centered 750 miles west of cape mendocino. A ridge will build from this high into the pacific northwest this weekend. This will result in increasing northwest windsover the northern waters.

7 Day Forecast for Marine Location Near Marin City, CA
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location: 37.87, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 180535
afdmtr
area forecast discussion
national weather service san francisco bay area
1035 pm pdt Thu aug 17 2017

Synopsis A gradual warming trend is forecast to continue
through late week as high pressure builds over the region. With
this, overnight and morning clouds can be expected as well,
especially along the coast and nearby valley locations. A cooling
trend is then expected late in the weekend into early next week as
an upper level trough impacts the region.

Discussion As of 8:57 pm pdt Thursday... Mostly clear skies
prevail this evening with low clouds currently only impacting the
north coast of the forecast area. Low clouds are sliding in
through coastal gaps and valley over marin and sonoma counties under
a compressing 1400 ft marine layer. Low clouds are anticipated to
fill in along the coast overnight however low clouds will not be
as extensive as previous mornings as a result of a ridge of high
pressure building over the eastern pacific that is consequently
compressing the marine layer along the coast.

Temperatures finished of the day significantly warmer then
yesterday as the warming trend continued across the district.

Temperatures rose 2-3 degrees along the coast to an average of 7
degrees inland. Highs reached into the mid to upper 60s along the
coast, 70s around the bays and mid 70s and 80s inland. The
warmest inland valley locations topped out in the upper 80s to
around 90 degrees. Bradley was our hot spot today with a high of
90 degrees. The warming trend will continue one more day and peak
on Friday.

Tonight low will be similar to last night in most locations while
slightly warmer overnight lows are anticipated across elevated
terrain situated above the marine inversion. The fort ord profiler
nicely depict the warming aloft as high pressure builds across the
region. It also depicts a shallower marine layer that will hamper
the spread of low clouds overnight. Therefore anticipate less
stratus coverage and hence a slightly quicker burnoff Friday
morning. Low clouds will give way to mostly sunny skies in the
afternoon for most locations on Friday and Saturday with afternoon
highs near seasonal averages with 60s to 70s at the coast and 80s
to 90s inland.

From previous discussion... The aforementioned ridge of high
pressure will shift westward out further into the pacific this
upcoming weekend and be replaced by a mid upper level trough. The
latest model run of the GFS continues to maintain near average
temperatures on Saturday before showing a cooling trend spreading
inland Sunday. Meanwhile, the NAM and ECMWF both show the cooling
trend to begin on Saturday and spreading inland into early next
week. Regardless, temperatures are forecast to cool slightly below
seasonal averages early next week. The challenging part of the
forecast will be how much this mid upper level trough and
associated low that is forecast to develop will impact the marine
layer. Depending on the exact set up, the marine layer may mix out
early in the week and result in earlier than normal burn-off time
of low clouds. Overall, dry weather conditions are also forecast
to persist through the middle of next week.

Aviation As of 10:30 pm pdt Thursday... Onshore gradients have
become more east-west this evening and stratus is starting to
spread into the northern sfo bay area and the north bay. CIGS are
expected into sfo oak and sts tonight but a southeast wind should
keep it out of sjc. The marine layer is expected to compress
further overnight and will lead to earlier clearing on Friday.

Vicinity of ksfo... MVFR after 10z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Stratus has remained well offshore
through the early evening hours. In the past this usually meant
the mry bay area would remain clear all night. CIGS have been
removed from the latest tafs.

Marine As of 10:30 pm pdt Thursday... A 1027 mb high is
centered 750 miles west of CAPE mendocino. A ridge will build from
this high into the pacific northwest this weekend. This will
result in increasing northwest windsover the northern waters.

Mtr watches warnings advisories
Tngt None.

Public forecast: cw
aviation: W pi
marine: W pi
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TIBC1 - Tiburon Pier, San Francisco Bay, CA 3 mi55 min SW 14 59°F 1016 hPa (+2.0)
FTPC1 - 9414290 - San Francisco, CA 5 mi47 min WSW 6 G 12 59°F 60°F1016.3 hPa (+1.1)
RCMC1 - 9414863 - Richmond, CA 6 mi47 min SSW 7 G 9.9 61°F 65°F1015.6 hPa (+1.1)
PXSC1 7 mi47 min 61°F 58°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 8 mi47 min S 16 G 18 60°F 1016.1 hPa (+1.1)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi47 min WSW 6 G 8 59°F 1015.1 hPa (+1.0)
46237 - San Francisco Bar, CA (142) 9 mi47 min 60°F4 ft
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi47 min W 6 G 9.9 60°F 1016.2 hPa (+1.1)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 10 mi47 min W 12 G 13
OBXC1 10 mi47 min 60°F 59°F
LNDC1 13 mi47 min W 6 G 7 61°F 1016.1 hPa (+1.0)
AAMC1 - 9414750 - Alameda, CA 13 mi47 min W 5.1 G 8 61°F 68°F1016.6 hPa (+0.9)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi47 min SW 16 G 19 62°F 1014.9 hPa (+1.1)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 20 mi57 min NNW 5.8 G 5.8 58°F 59°F4 ft1016.6 hPa (+0.9)
MZXC1 - 9415102 - Martinez-Amorco CA 23 mi47 min WNW 14 G 16 64°F 68°F1015 hPa (+1.1)58°F
PRYC1 - 9415020 - Point Reyes, CA 27 mi47 min W 7 G 8 61°F 60°F1016 hPa (+0.4)
PCOC1 - 9415144 - Port Chicago, CA 28 mi47 min W 18 G 20 65°F 71°F1014.3 hPa (+1.0)
RTYC1 - 9414523 - Redwood City, CA 29 mi47 min W 1.9 G 2.9 66°F 73°F1015.3 hPa (+1.0)
SFXC1 - San Francisco Bay Reserve, CA 34 mi62 min W 9.9 63°F 1013 hPa56°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 35 mi47 min WNW 15 G 18 71°F 1013 hPa (+0.4)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi57 min WSW 1.9 G 3.9 61°F 62°F6 ft1016.2 hPa (+1.1)

Wind History for San Francisco, CA
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SW5
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA19 mi52 minNNW 410.00 miA Few Clouds59°F53°F82%1015.9 hPa
San Francisco, San Francisco International Airport, CA19 mi51 minW 1510.00 miA Few Clouds66°F55°F70%1015.7 hPa
Oakland, Metro Oakland International Airport, CA19 mi54 minWNW 109.00 miA Few Clouds61°F57°F90%1015.9 hPa

Wind History from SFO (wind in knots)
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Last 24hrNW6NW4W4W5S3W4CalmCalmNW4NW4NW6N5N8NW14NW15NW16NW18W20W18W14NW14NW14W12W15
1 day agoW11SW66S4S4CalmCalmSE3SE3CalmSE7N6N8N86NW13
G19
W13NW14NW13NW14NW10W9NW7NW5
2 days agoSW10SW9W10SW8SW7SW9SW7S5S7SW8SW15SW11SW16SW14
G24
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W17W17
G24
W15W13W11SW6SW11

Tide / Current Tables for Sausalito, Corps of Engineers Dock, San Francisco Bay, California
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Sausalito
Click for Map
Fri -- 03:05 AM PDT     Moonrise
Fri -- 03:43 AM PDT     -0.34 feet Low Tide
Fri -- 06:28 AM PDT     Sunrise
Fri -- 10:41 AM PDT     4.74 feet High Tide
Fri -- 03:30 PM PDT     2.48 feet Low Tide
Fri -- 05:44 PM PDT     Moonset
Fri -- 07:58 PM PDT     Sunset
Fri -- 09:35 PM PDT     6.54 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.21.70.5-0.2-0.30.10.91.9344.64.74.33.732.52.63.13.94.95.86.46.55.9

Tide / Current Tables for Richardson Bay Entrance, San Francisco Bay, California Current
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Richardson Bay Entrance
Click for Map
Fri -- 01:53 AM PDT     0.01 knots Slack
Fri -- 03:05 AM PDT     Moonrise
Fri -- 04:25 AM PDT     1.09 knots Max Flood
Fri -- 06:28 AM PDT     Sunrise
Fri -- 07:59 AM PDT     -0.00 knots Slack
Fri -- 11:19 AM PDT     -0.45 knots Max Ebb
Fri -- 01:47 PM PDT     0.01 knots Slack
Fri -- 04:03 PM PDT     0.87 knots Max Flood
Fri -- 05:44 PM PDT     Moonset
Fri -- 07:17 PM PDT     -0.01 knots Slack
Fri -- 07:58 PM PDT     Sunset
Fri -- 11:36 PM PDT     -1.00 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.40.10.71.11.10.90.5-0-0.2-0.4-0.5-0.4-0.20.10.60.90.80.60.1-0.2-0.6-0.8-1

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 (2,6,7,8)
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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.