Friday, November17, 2017 L-36.com


Marine Weather and Tides
Petaluma, 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 6:53AMSunset 4:57PM Friday November 17, 2017 4:48 PM PST (00:48 UTC) Moonrise 5:58AMMoonset 4:57PM Illumination 1% Phase: Waning Crescent; Moon at 29 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- 218 Pm Pst Fri Nov 17 2017
Tonight..NE winds 5 to 15 kt.
Sat..N winds 10 kt.
Sat night..N winds 10 kt.
Sun..NW winds 10 kt.
Sun night..SW winds 10 kt. Slight chance of rain after midnight.
Mon..SE winds 5 to 15 kt...decreasing to 5 kt. Chance of rain.
Tue..E winds 5 kt. Slight chance of rain.
Wed..N winds 5 kt. Slight chance of rain.
PZZ500 218 Pm Pst Fri Nov 17 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to locally moderate northerly winds for the rest of the day, then decreasing through the weekend. Strongest winds will be along the big sur coast for today. Winds turn southerly and increase Sunday night into early Monday ahead of a weak frontal boundary. Seas light to moderate, easing through the coming days.

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 172341
afdmtr
area forecast discussion
national weather service san francisco bay area
341 pm pst Fri nov 17 2017

Synopsis Dry and seasonably cool weather can be expected
through the weekend. The next system will bring renewed chances
of rain starting late Sunday night. Additional rainfall is
possible the rest of the week, especially for the north bay.

Discussion As of 1:30 pm pst Friday... Showers have come to an
end with satellite showing the only area with clouds confined to
far southeastern monterey county plus san benito county.

Additional rainfall this morning was very light in fact most ares
did not pick up anything additional. With more sunshine
temperatures have been running a bit warmer than Thursday. Most
places today will end in the 60s.

Dry weather will continue into the weekend as a ridge of high
pressure builds into our region. Temperatures are expected to be
mostly in the upper 50s to mid 60s during the day with 30s and 40s
overnight. North bay valley spots will drop into the 30s and
possibly even a few 20s. NAM guidance came up a few degree
compared to yesterday, so will not go with a freeze warning at
this time.

Rain will return to our region late on Sunday or early Monday as
low moves to the pacnw coast while an associated front approaches
our region. The bulk of the moisture and favorable dynamics will
stay north of our cwa, however the southern edge will go into the
north bay. The front will dissipate as it progresses farther to
the south, so any rainfall down to monterey bay will be very
limited. By Tuesday generally 1 3-1" can be expected over the
north bay with 2 10" to 1 2" around san francisco bay into the
santa cruz mountains. Lesser amounts are likely for the remainder
of our region. No issues are anticipated around recent burn areas.

Beyond Tuesday, still a moderate about of uncertainty with the
storm track and how far south moisture will progress. Overall now
looks like most of the rain will stay to our north with just some
light precipitation anticipated over the north bay and possibly
into the san francisco bay area. Thanksgiving day look mostly dry
with just a slight chance for showers.

Aviation As of 3:40 pm pst Friday... For 00z tafs. No major
changes from previous aviation discussion.VFR will continue,
along with light winds, through the TAF period. Kept shallow
patchy dense fog for ksts late tonight into sunrise Saturday for
now, but with relatively low confidence.

Vicinity of ksfo...VFR. Light and variable winds after sunset.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. W NW winds until sunset, then turn
e SE late this evening, but will remain below 10 kt.

Marine As of 09:52 am pst Friday... Generally light to locally
moderate northerly winds today, then decreasing through the
weekend. Strongest winds today will be along the big sur coast.

Winds turn southerly and increase Sunday night into early Monday
ahead of a weak frontal boundary. Seas light to moderate, easing
through the coming days.

Mtr watches warnings advisories
Tngt Sca... Pt pinos to pt piedras blancas 0-10 nm until 9 pm
public forecast: bell
aviation: bam
marine: drp
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 24 mi47 min NNW 4.1 56°F 1022 hPa
SFXC1 - San Francisco Bay Reserve, CA 30 mi64 min NNE 8.9 60°F 1021 hPa36°F
46237 - San Francisco Bar, CA (142) 30 mi49 min 57°F5 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi59 min NNW 12 G 16 56°F 57°F5 ft1021.6 hPa (-0.6)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 37 mi39 min NNW 12 G 14 56°F 56°F1022.5 hPa47°F

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA3 mi54 minN 510.00 miFair61°F37°F42%1022 hPa
Novato / Gnoss Field, CA6 mi54 minN 710.00 miFair63°F39°F42%1022 hPa
Napa, Napa County Airport, CA17 mi55 minN 810.00 miFair62°F37°F40%1020.8 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA23 mi56 minNW 310.00 miFair62°F41°F46%1020.9 hPa

Wind History from O69 (wind in knots)
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Last 24hrSW5CalmCalmCalmW8W54CalmW4CalmCalmCalmCalmCalmCalmCalmCalmW6CalmCalmCalmN4NE4N4
1 day ago------------------------------------3----------
2 days ago------------SW3CalmCalmCalmCalmCalmCalmW5SW3CalmCalmCalmS4SE5SE7
G12
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E7E6

Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
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Upper drawbridge
Click for Map
Fri -- 01:08 AM PST     5.53 feet High Tide
Fri -- 05:58 AM PST     Moonrise
Fri -- 06:54 AM PST     Sunrise
Fri -- 06:58 AM PST     1.55 feet Low Tide
Fri -- 12:32 PM PST     6.99 feet High Tide
Fri -- 04:56 PM PST     Sunset
Fri -- 04:57 PM PST     Moonset
Fri -- 07:49 PM PST     -0.21 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
55.55.34.63.62.51.81.523.14.55.96.86.96.35.23.72.10.8-0-0.20.41.52.8

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Fri -- 12:22 AM PST     -0.00 knots Slack
Fri -- 03:02 AM PST     -0.51 knots Max Ebb
Fri -- 05:44 AM PST     0.00 knots Slack
Fri -- 05:57 AM PST     Moonrise
Fri -- 06:53 AM PST     Sunrise
Fri -- 08:22 AM PST     0.68 knots Max Flood
Fri -- 11:58 AM PST     -0.00 knots Slack
Fri -- 03:50 PM PST     -0.86 knots Max Ebb
Fri -- 04:55 PM PST     Sunset
Fri -- 04:57 PM PST     Moonset
Fri -- 07:20 PM PST     0.00 knots Slack
Fri -- 10:03 PM PST     0.58 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.2-0.4-0.5-0.5-0.20.10.50.70.70.50.3-0-0.4-0.7-0.8-0.9-0.8-0.5-0.10.20.50.60.5

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 (19,4,5,8)
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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.