Saturday, August17, 2019 L-36.com


Marine Weather and Tides
Petaluma, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:25AMSunset 8:03PM Saturday August 17, 2019 6:41 PM PDT (01:41 UTC) Moonrise 8:33PMMoonset 7:19AM Illumination 94% Phase: Waning Gibbous; Moon at 17 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 The San Francisco Bay North Of The Bay Bridge- 252 Pm Pdt Sat Aug 17 2019
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..SW winds 15 to 20 kt with gusts up to 30 kt.
Sun..SW winds 10 to 20 kt with gusts up to 25 kt.
Sun night..SW winds 10 to 15 kt.
Mon..SW winds 10 to 15 kt.
Mon night..SW winds 10 to 15 kt.
Tue..SW winds 10 to 15 kt.
Tue night..SW winds 10 to 15 kt.
Wed..W winds 15 to 20 kt with gusts up to 25 kt.
Thu..SW winds 15 to 20 kt with gusts up to 25 kt.
PZZ500 252 Pm Pdt Sat Aug 17 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to gusty northwesterly winds will persist over the northern and outer waters into Sunday as high pressure dominates the eastern pacific. The high pressure will begin to weaken on Sunday and into early next week ahead of a developing low pressure center off of british columbia. The persistent fetch produced by these systems will generate fresh short period swell that will propagate into the california coastal waters. This short period swell in combination with gusty winds will generate hazardous seas conditions, particularly for smaller vessels.


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 180004
afdmtr
area forecast discussion
national weather service san francisco bay area
504 pm pdt Sat aug 17 2019

Synopsis The cooling trend continues today with clear skies
inland with a deep marine layer and stratus clouds along the
coastline. These conditions should continue on Sunday as well. Dry
and seasonable temperatures are expected Monday and Tuesday before
the next warming trend begins midweek.

Discussion As of 01:33 pm pdt Saturday... Another day to show
off the cooling trend that is currently under way for the bay
area. At the time of writing this afd napa is 12 degrees cooler
than this time yesterday, concord and san jose are 13 degrees
cooler, and livermore is 18 degrees cooler. These cooler temps are
being driven by an upper level trough axis sitting right over the
bay area. The fort ord profiler has shown the marine layer has
deepened to 2500 feet by 9am this morning while onshore flow
persists along the coast. Clear skies can be found for inland
locations, but stratus clouds linger just offshore. There is a
small chance for patchy areas along the san mateo, santa cruz, and
big sur coastlines to have light drizzle overnight and in the
early morning hours Sunday. But most drizzle chances should be
done by mid morning. Tomorrow, the stratus will continue to linger
near the coastline, while inland areas should be mostly clear
once again. The cooling trend continues tomorrow, but with less
magnitude than yesterday and today.

The low in canada that is directing the trough moves eastward Sunday
evening, as high pressure begins to build over texas. The growing
high pressure will rotate the trough from a positive tilt to a
negative tilt, but with near consistent dam heights it will not
impact the conditions at the surface. This will allow for dry,
seasonal conditions for the early work week. As a strong low takes
shape in the north pacific, the high pressure continues to build
in the southern plains and slowly shifts toward the desert
southwest by midweek, leading to a warming trend for the bay area
expected to last until the end of the work week.

Aviation As of 5:02 pm pdt Saturday... The marine layer has
deepened significantly today and clouds are already spreading
through the golden gate. However southerly flow will keep clouds
out of sfo and the approach until late tonight possibly midnight.

Timing of clearing on Sunday remains a bit more tricky as a deep
marine layer supports late clearing time. But cold air advection
arriving from the north should help to mix out the marine
inversion earlier. Latest forecast calls for late morning or early
afternoon burnoff.

Vicinity of ksfo...VFR through the airport evening rush. MVFR cigs
after 08z. West to southwest winds to 15 kt decreasing after 04z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... The deep marine layer has allowed for an
early intrusion into mry and sns. MVFR CIGS may lower to near ifr
conditions after 06z.

Marine As of 04:46 pm pdt Saturday... Moderate to gusty
northwesterly winds will persist over the northern and outer
waters into Sunday as high pressure dominates the eastern pacific.

The high pressure will begin to weaken on Sunday and into early
next week ahead of a developing low pressure center off of
british columbia. The persistent fetch produced by these systems
will generate fresh short period swell that will propagate into
the california coastal waters. This short period swell in
combination with gusty winds will generate hazardous seas
conditions, particularly for smaller vessels.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Sf bay until 9 pm
public forecast: dk
aviation: W pi
marine: canepa
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 21 mi72 min SSW 20 G 28 63°F 1008.1 hPa
RCMC1 - 9414863 - Richmond, CA 23 mi72 min 66°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 24 mi91 min SSW 6 60°F 1010 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 25 mi72 min SW 17 G 23 62°F 1009.8 hPa
PRYC1 - 9415020 - Point Reyes, CA 25 mi72 min 62°F1009.9 hPa
UPBC1 28 mi72 min SW 9.9 G 24
MZXC1 - 9415102 - Martinez-Amorco CA 28 mi72 min SSW 12 G 22 67°F 72°F1008.1 hPa
FTPC1 - 9414290 - San Francisco, CA 29 mi72 min SW 9.9 G 19 61°F 61°F1010.2 hPa
46237 - San Francisco Bar, CA (142) 30 mi72 min 57°F4 ft
SFXC1 - San Francisco Bay Reserve, CA 30 mi117 min W 11 75°F 1008 hPa58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 31 mi72 min W 5.1 G 15 62°F 1008.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi72 min WSW 18 G 21
PCOC1 - 9415144 - Port Chicago, CA 32 mi72 min WSW 15 G 19 70°F 73°F1008 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi72 min WSW 9.9 G 15 64°F 1010 hPa
OBXC1 32 mi72 min 62°F 58°F
LNDC1 34 mi72 min W 9.9 G 20 63°F 1010 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi42 min S 9.7 G 12 59°F 1010.3 hPa (-1.4)
AAMC1 - 9414750 - Alameda, CA 35 mi72 min W 15 G 19 63°F 71°F1010.6 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 37 mi42 min SSW 1.9 G 5.8 53°F1009.3 hPa (-1.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 40 mi72 min W 12 G 18 75°F 1006.8 hPa

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA3 mi87 minNW 89.00 miFair75°F57°F54%1008.5 hPa
Novato / Gnoss Field, CA6 mi87 minSSW 1210.00 miFair79°F53°F42%1007.4 hPa
Napa, Napa County Airport, CA17 mi1.8 hrsS 17 G 246.00 miFair with Haze67°F55°F68%1007.6 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA23 mi1.8 hrsS 99.00 miFair76°F57°F52%1007.4 hPa

Link to 5 minute data for KO69

Wind History from O69 (wind in knots)
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Last 24hrW7NW4
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W6CalmNW5W4CalmCalmCalmCalmCalmCalmCalmNW4CalmCalm4Calm4SW44NW7NW8W10
1 day agoCalmNW3W5NW4CalmNW3CalmNW4CalmCalmCalmCalmCalmW4W4W66W7W7
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2 days agoNW5CalmCalmNW33W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm5
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Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
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Upper drawbridge
Click for Map
Sat -- 03:02 AM PDT     6.71 feet High Tide
Sat -- 06:26 AM PDT     Sunrise
Sat -- 08:19 AM PDT     Moonset
Sat -- 10:31 AM PDT     0.15 feet Low Tide
Sat -- 04:27 PM PDT     5.88 feet High Tide
Sat -- 08:01 PM PDT     Sunset
Sat -- 09:32 PM PDT     Moonrise
Sat -- 10:40 PM PDT     1.91 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.54.96.26.76.55.74.53.11.80.80.20.31.12.33.855.85.85.34.43.42.522

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Sat -- 02:26 AM PDT     -0.00 knots Slack
Sat -- 05:48 AM PDT     -0.83 knots Max Ebb
Sat -- 06:26 AM PDT     Sunrise
Sat -- 08:18 AM PDT     Moonset
Sat -- 09:35 AM PDT     0.00 knots Slack
Sat -- 12:17 PM PDT     0.62 knots Max Flood
Sat -- 04:00 PM PDT     -0.00 knots Slack
Sat -- 06:38 PM PDT     -0.48 knots Max Ebb
Sat -- 08:00 PM PDT     Sunset
Sat -- 09:30 PM PDT     0.00 knots Slack
Sat -- 09:32 PM PDT     Moonrise
Sat -- 11:50 PM PDT     0.56 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.40.1-0.2-0.6-0.8-0.8-0.8-0.6-0.20.20.50.60.60.50.3-0-0.3-0.5-0.5-0.4-0.20.20.5

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 (21,6,7,8)
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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.