Monday, May29, 2017 L-36.com


Marine Weather and Tides
Petaluma, 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 5:48AMSunset 8:27PM Sunday May 28, 2017 10:49 PM PDT (05:49 UTC) Moonrise 7:57AMMoonset 10:34PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 811 Pm Pdt Sun May 28 2017
.small craft advisory in effect until 3 am pdt Monday...
.small craft advisory in effect from Monday afternoon through late Monday night...
Tonight..W winds 10 to 20 kt in the evening decreasing to 10 to 20 kt after midnight. Patchy fog after midnight.
Memorial day..W winds 10 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Mon night..W winds 15 to 25 kt in the evening decreasing to 10 to 20 kt overnight. Patchy fog after midnight.
Tue..W winds 10 to 20 kt. Patchy fog in the morning.
Tue night..W winds 10 to 20 kt. Slight chance of showers after midnight.
Wed..W winds 10 to 20 kt...decreasing to 10 kt. Patchy fog.
Thu..W winds 10 kt. Patchy fog.
Fri..SW winds 10 kt. Patchy fog.
PZZ500 811 Pm Pdt Sun May 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Brisk northwest winds will continue over the coastal waters tonight and into the memorial day holiday as high pressure remains strong off the west coast. The gusty winds will produce hazardous conditions with steeper wind waves and fresh swell. Winds will decrease Tuesday night as a weak frontal system moves through the coastal waters.

7 Day Forecast for Marine Location Near Petaluma, CA
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location: 38.22, -122.6     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 290528
afdmtr
area forecast discussion
national weather service san francisco bay area
1028 pm pdt Sun may 28 2017

Synopsis Dry weather and seasonable temperatures are forecast
through Monday. Slight cooling along with a minor chance for
showers is expected Tuesday and Wednesday, but otherwise little
change is forecast through the week.

Discussion As of 9:00 pm pdt Sunday... A weak upper level ridge
sits over the west coast. Good onshore push kept low clouds in
for most of the day around sfo bay and the mry bay area.

Temperatures today were consequently a few degrees below normal.

Not much change is expected Monday as morning low clouds and
continued onshore flow prevents much warming of temperatures. The
ridge will move east Monday night as an upper level trough
approaches from the west. The marine layer will deepen Monday
night and there could be local drizzle along the coast and
coastal mountains as indicated by the nam. Temperatures will be a
few degrees cooler on Tuesday. A secondary upper trough moves
through Tuesday night bringing a more cooler airmass to the area.

The WRF and the GFS bring a line of light showers through the
district Tuesday night while the NAM and ECMWF keep things dry.

Given there will be some instability from the airmass cooling
aloft it is worth mentioning a slight chance of showers Tuesday
night.

Clearing is expected Wednesday after the trough moves through and
mixes out the marine layer. More Sun is expected on Wednesday
which should allow for a slight warming.

Low pressure will be the dominant feature over the eastern pacific
the rest of the week keeping a westerly flow over the area. This
will prevent any ridging from forming over the state. Temperatures
will return to near normal but no significant warming is expected
through next weekend.

Aviation 10:25 pm pdt Sunday for 06z tafs... Low clouds are
moving back in tonight with several terminals already reporting
ifr MVFR ceilings. Expect all terminals to see low clouds
as the night progresses and continue into Monday morning. Some
locations may see the clouds persist into the afternoon, or even
all day. West to northwest winds will become gusty by Monday
afternoon.

Vicinity of ksfo... Low clouds have pushed through the gap and have
brought overcast ifr ceilings to the most recent hourly
observation. Expect low clouds to persist through most of the
morning. Guidance suggests strong west winds on Monday afternoon
with gusts up to 25 or 30 kt.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr ceilings overnight and through
Monday morning. Similar to Sunday, ksns has a better chance for
clearing in the afternoon whereas kmry may remain overcast through
the afternoon. Winds will increase Monday afternoon out of the
west at 10 to 20 kt.

Marine As of 10:09 pm pdt Sunday... Brisk northwest winds will
continue over the coastal waters tonight and into the memorial
day holiday as high pressure remains strong off the west coast.

The gusty winds will produce hazardous conditions with steeper
wind waves and fresh swell. Winds will decrease Tuesday night as
a weak frontal system moves through the coastal waters.

Mtr watches warnings advisories
Tngt 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... Sf bay until 3 am
sca... Mry bay until 3 am
public forecast: W pi
aviation: rowe
marine: rowe sims
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 21 mi49 min WSW 14 G 19 57°F 1015.6 hPa (+0.6)
RCMC1 - 9414863 - Richmond, CA 23 mi49 min W 1 G 5.1 57°F 59°F1016.1 hPa (+0.8)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 24 mi57 min SW 5.1 55°F 1016 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 25 mi49 min S 8.9 G 12 58°F 1016.6 hPa (+0.5)
PRYC1 - 9415020 - Point Reyes, CA 25 mi49 min WNW 16 G 20 54°F 51°F1016.8 hPa (+0.5)
UPBC1 28 mi49 min WNW 8.9 G 11
MZXC1 - 9415102 - Martinez-Amorco CA 28 mi49 min WNW 8.9 G 11 60°F 65°F1015.8 hPa (+0.7)56°F
FTPC1 - 9414290 - San Francisco, CA 29 mi49 min W 13 G 18 53°F 57°F1016.9 hPa (+0.4)
SFXC1 - San Francisco Bay Reserve, CA 30 mi64 min WNW 7 58°F 1015 hPa55°F
46237 - San Francisco Bar, CA (142) 30 mi49 min 55°F4 ft
PXSC1 31 mi49 min 54°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 31 mi55 min WSW 7 G 14 54°F 1015.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi49 min WSW 11 G 15
OBXC1 32 mi49 min 55°F 51°F
PCOC1 - 9415144 - Port Chicago, CA 32 mi49 min SSW 8.9 G 14 57°F 66°F1015.2 hPa (+0.7)
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi49 min W 5.1 G 9.9 55°F 1017.2 hPa (+0.7)
LNDC1 34 mi49 min W 8 G 11 55°F 1017.3 hPa (+0.7)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi59 min NW 19 G 23 53°F 54°F6 ft1017.1 hPa (+0.4)
AAMC1 - 9414750 - Alameda, CA 35 mi49 min W 2.9 G 8 55°F 63°F1017.8 hPa (+0.7)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 37 mi39 min NW 25 G 31 52°F 52°F1016.4 hPa50°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 40 mi49 min W 8.9 G 14 62°F 1014 hPa (+0.3)

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA3 mi54 minNNW 39.00 miOvercast54°F51°F94%1016.9 hPa
Novato / Gnoss Field, CA6 mi74 minNE 610.00 miFair55°F50°F82%1016.3 hPa
Napa, Napa County Airport, CA17 mi55 minWSW 710.00 miA Few Clouds58°F52°F81%1015.1 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA23 mi56 minSE 610.00 miFair55°F51°F87%1014.8 hPa

Wind History from O69 (wind in knots)
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Last 24hrW8NW3NW4W53W5CalmW4CalmCalmSW5CalmCalmCalmNW6
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W10--5W11W8W10CalmNW43
1 day agoNW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW4
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2 days agoW6W4W5CalmCalmCalmCalmCalmCalmCalmCalmS3CalmS4CalmCalmW5
G12
Calm53SW7W7NW5Calm

Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
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Upper drawbridge
Click for Map
Mon -- 04:31 AM PDT     7.05 feet High Tide
Mon -- 05:50 AM PDT     Sunrise
Mon -- 10:02 AM PDT     Moonrise
Mon -- 12:05 PM PDT     -1.13 feet Low Tide
Mon -- 06:43 PM PDT     5.83 feet High Tide
Mon -- 08:26 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.23.14.55.96.976.45.23.51.80.3-0.8-1.1-0.80.31.73.34.75.65.85.34.43.42.5

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Mon -- 12:28 AM PDT     0.70 knots Max Flood
Mon -- 03:48 AM PDT     -0.01 knots Slack
Mon -- 05:49 AM PDT     Sunrise
Mon -- 07:17 AM PDT     -0.97 knots Max Ebb
Mon -- 10:02 AM PDT     Moonrise
Mon -- 11:36 AM PDT     0.00 knots Slack
Mon -- 02:46 PM PDT     0.62 knots Max Flood
Mon -- 06:22 PM PDT     -0.00 knots Slack
Mon -- 08:25 PM PDT     Sunset
Mon -- 08:41 PM PDT     -0.40 knots Max Ebb
Mon -- 11:08 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.70.70.50.3-0.1-0.5-0.8-1-0.9-0.8-0.6-0.20.20.50.60.60.50.40.1-0.2-0.4-0.4-0.3-0

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 (1,6,7,8)
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Ground Weather Radar Station Sacramento, 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.