Saturday, May26, 2018 L-36.com


Marine Weather and Tides
Mill Valley, 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 5:50AMSunset 8:23PM Friday May 25, 2018 9:25 PM PDT (04:25 UTC) Moonrise 3:40PMMoonset 2:56AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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- 910 Pm Pdt Fri May 25 2018
Tonight..W winds 10 kt. Slight chance of showers late in the evening.
Sat..SW winds 5 to 15 kt.
Sat night..W winds 10 to 20 kt.
Sun..SW winds 10 to 20 kt.
Sun night..SW winds 10 to 20 kt.
Memorial day..SW winds 10 to 20 kt.
Tue..SW winds 5 kt...increasing to 5 to 15 kt.
Wed..SW winds 10 kt...increasing to 10 to 20 kt.
PZZ500 910 Pm Pdt Fri May 25 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwesterly winds will gradually increase tonight into Saturday. Gusty winds will continue through the weekend and into early next week creating steep wind waves and hazardous conditions for small craft. A mixed northwest and southwest swell will continue through the forecast period.

7 Day Forecast for Marine Location Near Mill Valley, CA
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location: 37.91, -122.54     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 260407
afdmtr
area forecast discussion
national weather service san francisco bay area
907 pm pdt Fri may 25 2018

Synopsis Dry conditions will return by Saturday. A warming
trend is forecast through the memorial day weekend as high
pressure builds over california. Cooler weather is then expected
to return by the middle of next week as another upper trough
approaches the coast.

Discussion As of 9:05 pm pdt Friday... Latest satellite and 00z
nam initialization indicate the upper low that brought scattered
light showers to our region last night and today is currently
centered over central california, and is drifting slowly to the
southeast. Radar data indicate that isolated showers ended around
sunset. However, the latest hrrr and NAM forecast isolated light
precipitation overnight. Will therefore leave slight shower
chances in the forecast overnight, but most areas will almost
certainly remain dry.

Dry weather is expected in all areas by Saturday morning as the
upper low moves well to our southeast. Moisture wrapping around
the departing upper low may keep some clouds over our area into
the morning hours, but expect mostly sunny skies by afternoon.

Temperatures are forecast to be slightly warmer on Saturday, but
still cooler than normal.

A robust warming trend is then forecast for Sunday and memorial
day as an upper ridge over the eastern pacific builds eastward
over california. 850 mb temperatures are forecast to warm from
about 5 deg c at the present time up to nearly 20 deg c by
Monday. In addition, onshore flow will gradually weaken through
the holiday weekend. Temperatures will warm back to around normal
on Sunday and then several degrees above normal on Monday. Some
of the warmest inland areas are forecast to see high temperatures
in the low to mid 90s by memorial day. Based on the boundary
layer rh forecast from the latest WRF model, we will likely see
areas of low clouds in coastal areas through Sunday, but enough
drying is expected in the boundary layer by Monday for more
widespread coastal clearing.

The models agree that an upper trough will approach from the
northwest on Tuesday. This will likely trigger an increase in
onshore flow and result in cooling at the coast and in the
coastal valleys. However, inland valleys will probably remain warm
into Tuesday. Widespread cooling is then expected by Wednesday of
next week as the trough deepens along the west coast. No
precipitation is expected through next week except for perhaps
night and morning coastal drizzle around midweek.

Aviation As of 4:42 pm pdt Friday... For 00z tafs. Kmux doppler
radar continues to show a few showers across the region therefore
have maintained vcsh in the tafs this afternoon. The chance of
showers will continue to taper. Confidence is low with respect to
cigs as the upper low moves directly over the forecast area this
evening. Anticipate a mixed bag of clouds through tonight with
cigs between 2000 to 5000 ft. Light onshore flow is expected
overnight into Saturday.

Vicinity of ksfo... CIGS remain around 2000 ft occasionally
lifting to 3000 ft. Borderline MVFRVFR conditions will continue
through tonight with broken CIGS temporarily scattering at times
late this afternoon early evening. Moderate southwest winds will
veer increasingly to west this evening. Vcsh due to occasional
weak showers through 04-05z Saturday.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Borderline MVFRVFR CIGS expected to
return around 03z this evening. Moderate winds will ease this
evening. Vcsh due to occasional weak showers through 03z
Saturday.

Marine As of 2:12 pm pdt Friday... Light winds will continue
this afternoon across the waters before increasing and becoming
northwesterly this evening. Winds will remain gusty through the
weekend and into the start of next week. Blustery winds early next
week will generate steep wind waves creating hazardous seas. A
mixed northwest and southwest swell will continue through the
forecast period.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm from 9 pm
sca... Pt arena to pigeon pt 10-60 nm from 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am
sca... Pt reyes to pigeon pt 0-10 nm from 9 pm
public forecast: dykema
aviation: cw
marine: as
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 5 mi44 min SW 6 55°F 1020 hPa
RCMC1 - 9414863 - Richmond, CA 7 mi43 min SW 4.1 G 9.9 56°F 60°F1019.3 hPa
FTPC1 - 9414290 - San Francisco, CA 8 mi37 min W 6 G 8.9 55°F 56°F1019.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi37 min W 8 G 11 58°F 1019.7 hPa
46237 - San Francisco Bar, CA (142) 10 mi55 min 56°F4 ft
PXSC1 11 mi37 min 57°F 54°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 11 mi37 min WSW 4.1 G 8.9 56°F 1018.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 13 mi37 min WSW 9.9 G 11
OBXC1 13 mi37 min 56°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 13 mi37 min W 5.1 G 7 56°F 1019.6 hPa
AAMC1 - 9414750 - Alameda, CA 16 mi43 min W 8 G 9.9 57°F 63°F1019.8 hPa
LNDC1 16 mi37 min W 5.1 G 7 58°F 1019.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi37 min SW 9.9 G 13 58°F 1018.9 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi25 min WNW 3.9 G 5.8 55°F 55°F1020.3 hPa (+0.0)55°F
MZXC1 - 9415102 - Martinez-Amorco CA 24 mi37 min WSW 7 G 8.9 58°F 64°F1019.3 hPa56°F
PRYC1 - 9415020 - Point Reyes, CA 24 mi37 min W 1.9 G 4.1 55°F1019.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 28 mi37 min SW 6 G 7 56°F 64°F1019 hPa
RTYC1 - 9414523 - Redwood City, CA 33 mi37 min WNW 8 G 8.9 57°F 64°F1019.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi100 min WNW 8.9 60°F 1018 hPa53°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 36 mi43 min W 5.1 G 8.9 59°F 1018.8 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 42 mi35 min NNE 1.9 G 3.9 55°F 56°F5 ft1019.4 hPa (+0.0)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 47 mi25 min NNW 18 G 21 55°F 1020 hPa (-0.4)52°F
46214 - Point Reyes, CA (029) 49 mi25 min 56°F7 ft

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA16 mi30 minN 010.00 miFair57°F51°F82%1019.3 hPa
San Francisco, San Francisco International Airport, CA22 mi29 minSW 610.00 miMostly Cloudy59°F50°F72%1019.6 hPa
Oakland, Metro Oakland International Airport, CA22 mi32 minW 1110.00 miMostly Cloudy58°F52°F81%1019.7 hPa
Petaluma Municipal Airport, CA24 mi50 minNW 310.00 miPartly Cloudy54°F53°F100%1019.6 hPa

Wind History from DVO (wind in knots)
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Last 24hrSW6SW74--W6SW6SW5
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SW4SW5S6S5S6SW64SW5SW7SW83CalmCalm354Calm
1 day agoCalm--SW5--SW103W9
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2 days ago4SW8SW3SW6SW8W7
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Tide / Current Tables for Corte Madera Creek, San Francisco Bay, California
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Corte Madera Creek
Click for Map
Sat -- 04:27 AM PDT     Moonset
Sat -- 05:09 AM PDT     0.10 feet Low Tide
Sat -- 05:52 AM PDT     Sunrise
Sat -- 11:24 AM PDT     4.42 feet High Tide
Sat -- 04:46 PM PDT     1.28 feet Low Tide
Sat -- 05:41 PM PDT     Moonrise
Sat -- 08:22 PM PDT     Sunset
Sat -- 11:08 PM PDT     6.06 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.34.12.71.40.50.10.311.933.94.44.33.82.921.41.31.72.53.64.75.66.1

Tide / Current Tables for Bluff Point .1 mi E, San Francisco Bay, California Current
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Bluff Point .1 mi E
Click for Map
Sat -- 03:05 AM PDT     -2.52 knots Max Ebb
Sat -- 04:27 AM PDT     Moonset
Sat -- 05:51 AM PDT     Sunrise
Sat -- 06:47 AM PDT     0.00 knots Slack
Sat -- 08:52 AM PDT     2.14 knots Max Flood
Sat -- 12:09 PM PDT     -0.01 knots Slack
Sat -- 03:26 PM PDT     -1.75 knots Max Ebb
Sat -- 05:40 PM PDT     Moonrise
Sat -- 06:44 PM PDT     0.00 knots Slack
Sat -- 08:22 PM PDT     Sunset
Sat -- 08:45 PM PDT     2.01 knots Max Flood
Sat -- 11:58 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.8-1.8-2.3-2.5-2.4-1.9-0.90.41.82.11.91.20.2-0.8-1.5-1.7-1.7-1.4-0.70.41.721.71

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 (0,6,7,8)
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Ground Weather Radar Station Sacramento, 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.