Saturday, November17, 2018 L-36.com


Marine Weather and Tides
Petaluma, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:53AMSunset 4:57PM Saturday November 17, 2018 11:00 AM PST (19:00 UTC) Moonrise 2:19PMMoonset 1:01AM Illumination 73% 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- 856 Am Pst Sat Nov 17 2018
Today..NE winds 10 kt...becoming sw in the afternoon. Patchy fog late in the morning. Haze and patchy smoke through the day.
Tonight..W winds 5 to 15 kt. Haze and patchy smoke.
Sun..N winds 10 kt. Haze and patchy smoke.
Sun night..W winds 5 to 15 kt. Haze and patchy smoke.
Mon..E winds 5 to 15 kt...becoming w. Haze and patchy smoke in the morning.
Tue..S winds 10 kt. Chance of rain.
Wed..S winds 5 to 15 kt. Rain likely, then chance of rain.
PZZ500 856 Am Pst Sat Nov 17 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds through the weekend and into early next week. An approaching storm system will bring increasing southerly winds mid week next week. Mixed moderate northwest swell and a light southerly swell will persist.


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 171758 aaa
afdmtr
area forecast discussion
national weather service san francisco bay area
958 am pst Sat nov 17 2018

Synopsis Widespread smoke and haze at times combining with
coastal fog resulting in extended poor air quality and low
visibilities over the san francisco bay area should show some
improvement first along the immediate coast today then inland
Sunday. A mid to upper level ridge has weakened and troughing is
already slowly moving in from the west this morning. Additionally
forecast models continue to indicate an active pacific weather
pattern reaching california next week with the potential for
widespread periodic rainfall starting Wednesday and continuing
into next weekend.

Discussion As of 9:50 am pst Saturday... Smoky conditions
continue to be the main talking point today, although coastal fog
has mixed into some areas, lowering visibilities locally to near
zero at times. The stagnant weather conditions will persist over
the next few days with only slight relief when weak onshore flow
resumes in the afternoons. Still looking towards the rain events
midweek to bring relief.

The upper level ridge anchored along the west coast which as been
maintaining the stagnant weather over the area is starting to
slowly break down with the approach of a pattern-changing upper
trough. Over the next couple of days, winds will be light, with
mild daytime highs and cool overnight lows. By mid-week, things
will change as the first of several frontal systems impacts the
region.

The 12z GFS continues to be the most bullish with these systems
and brings rainfall into coastal areas from the monterey bay
northward late Tuesday night, spreading eastward through the rest
of norcal on Wednesday. Another system is progged for Friday with
showers into Saturday, and then a third front moves through on
Sunday. The 00z ECMWF has a stronger trough initially reaching the
coast early Wednesday morning, and spreading rainfall eastward
Wednesday and Thursday. Then, another system tries to push in from
the north on Friday, but a ridge rebuilds over the eastern
pacific by Saturday, temporarily shunting storms to the north.

Regardless of some of these model differences, indications
continue to be positive concerning rain chances in northern
california, and this happening will help alleviate fire weather
concerns, including air quality due to wildfire smoke.

Aviation As of 09:50 am pst Saturday... For 18z tafs. Tafs
adjusted towards a more pessimistic scenario due to development
of smog from mixing of marine air mass and smoke particulates this
morning. Monterey area saw visibility of 1 8mi or less this
morning due to this and a deeper marine intrusion is expected
tonight. This will also bring ceilings down in addition to
visibility, but it will be difficult to pin down an actual ceiling
with all the smoke present. Expect borderline MVFR to ifr cigs
thru tomorrow morning if marine push is as robust as WRF model
indicates, however, smoke present may worsen ceilings slightly,
bringing some areas down to borderline lifr-ifr range. Visibility
will be worse near or just after sunrise thru mid morning with
additional slant range visby issues. Tempo 12-16z for most tafs
sun morning reflects this. No widescale improvement in visibility
expected until the next storm system arrives mid week next week.

Light winds.

Vicinity of ksfo... Ifr MVFR vis due to smog. Slant range vis
issues will persist. Marine stratus push tonight will bring
additional issues with CIGS tmrw morn. Winds light.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Vlifr visibilities due to smog possibly
return again tomorrow morning. Generally ifr- MVFR visibilities
through TAF period otherwise. Light winds.

Marine As of 09:45 am pst Saturday... Light winds through the
weekend and into early next week. An approaching storm system will
bring increasing southerly winds mid week next week. Mixed
moderate northwest swell and a light southerly swell will
persist.

Mtr watches warnings advisories
Tday None.

Public forecast: sims
aviation: drp
marine: drp
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 mi37 min W 2.9 G 7 55°F 1017.9 hPa
RCMC1 - 9414863 - Richmond, CA 23 mi31 min NW 1 G 1.9 52°F 56°F1017.9 hPa
PRYC1 - 9415020 - Point Reyes, CA 25 mi31 min ENE 2.9 G 4.1 54°F1018 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 25 mi37 min SW 2.9 G 4.1 53°F 1018.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 28 mi31 min NNE 4.1 G 5.1 51°F 57°F1018.5 hPa39°F
FTPC1 - 9414290 - San Francisco, CA 29 mi31 min WNW 6 G 7 54°F 55°F1018.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 30 mi76 min WNW 1 48°F 1018 hPa36°F
46237 - San Francisco Bar, CA (142) 30 mi61 min 54°F4 ft
PXOC1 - 9414311 - San Francisco (Pier 1), CA 31 mi31 min N 2.9 G 4.1 53°F 1017.3 hPa
PXSC1 31 mi31 min 55°F 44°F
PCOC1 - 9415144 - Port Chicago, CA 32 mi31 min NE 4.1 G 5.1 51°F 57°F1018.6 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi31 min NE 1 G 2.9 53°F 1018.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi31 min NE 2.9 G 4.1
OBXC1 32 mi31 min 54°F 43°F
LNDC1 34 mi79 min NW 4.1 G 5.1 52°F 1018.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi21 min Calm G 1.9 55°F 54°F1019.1 hPa
AAMC1 - 9414750 - Alameda, CA 35 mi31 min NNW 1.9 G 4.1 54°F 57°F1018.5 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 37 mi21 min ESE 3.9 G 5.8 56°F1018.3 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 40 mi31 min NE 2.9 G 4.1 51°F 1018.3 hPa

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA3 mi66 minN 02.00 miFair with Haze48°F37°F66%1018.3 hPa
Novato / Gnoss Field, CA6 mi66 minN 02.00 miFair with Haze48°F35°F62%1018.3 hPa
Napa, Napa County Airport, CA17 mi67 minN 03.00 miHaze Smoke51°F30°F46%1017.4 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA23 mi68 minN 02.50 miHaze Smoke46°F34°F63%1017.4 hPa

Wind History from DVO (wind in knots)
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Last 24hr4SE4SE5SE4SE3S5S4CalmS4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm3
1 day ago4SE5S6S6SE5SE4SE4CalmCalmS4CalmCalmN3CalmCalmS3CalmS3S7CalmCalmCalmCalmCalm
2 days agoCalmSE4SE4SE6SE4E4S4CalmS3S3CalmCalmCalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmS4

Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
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Upper drawbridge
Click for Map
Sat -- 01:01 AM PST     Moonset
Sat -- 03:35 AM PST     0.76 feet Low Tide
Sat -- 06:53 AM PST     Sunrise
Sat -- 09:47 AM PST     5.94 feet High Tide
Sat -- 02:19 PM PST     Moonrise
Sat -- 04:50 PM PST     1.67 feet Low Tide
Sat -- 04:56 PM PST     Sunset
Sat -- 09:24 PM PST     4.93 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.821.20.80.81.42.53.74.95.75.95.654.13.12.31.81.72.23.24.24.94.94.5

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Sat -- 01:00 AM PST     Moonset
Sat -- 02:35 AM PST     0.00 knots Slack
Sat -- 05:47 AM PST     0.67 knots Max Flood
Sat -- 06:52 AM PST     Sunrise
Sat -- 09:18 AM PST     -0.00 knots Slack
Sat -- 12:20 PM PST     -0.61 knots Max Ebb
Sat -- 02:18 PM PST     Moonrise
Sat -- 03:24 PM PST     0.00 knots Slack
Sat -- 04:56 PM PST     Sunset
Sat -- 05:46 PM PST     0.43 knots Max Flood
Sat -- 08:44 PM PST     -0.00 knots Slack
Sat -- 11:49 PM PST     -0.65 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.5-0.20.20.50.60.70.60.40.1-0.2-0.5-0.6-0.6-0.4-0.10.20.40.40.40.2-0.1-0.4-0.6

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 (14,3,4,5)
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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.