Tuesday, April25, 2017 L-36.com


Marine Weather and Tides
Petaluma, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:18AMSunset 7:58PM Tuesday April 25, 2017 11:34 AM PDT (18:34 UTC) Moonrise 5:08AMMoonset 6:15PM Illumination 0% Phase: New Moon; 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 826 Am Pdt Tue Apr 25 2017
Today..W winds 10 kt...increasing to 10 to 20 kt in the afternoon.
Tonight..W winds 10 to 20 kt.
Wed..W winds 10 to 20 kt. Slight chance of showers in the morning.
Wed night..W winds 10 to 20 kt.
Thu..NW winds 5 to 15 kt.
Fri..NW winds 5 to 15 kt.
Sat..N winds 10 kt...becoming west.
PZZ500 826 Am Pdt Tue Apr 25 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to locally strong northerly winds will prevail as high pressure remains anchored off the coast. The strongest winds will likely occur Monterey bay southward along the immediate coast. Winds and seas will increase over all coastal waters on Wednesday as high pressure strengthens.

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 251721
afdmtr
area forecast discussion
national weather service san francisco bay area
1021 am pdt Tue apr 25 2017

Synopsis Dry weather with comfortable temperatures can be
expected today. Another chance of rain, mainly over the north
bay, is slated for Wednesday, with dry and seasonably cool weather
expected elsewhere. Dry weather along with a warming trend is
forecast across the region from Thursday through the weekend as
high pressure builds in. Breezy conditions are likely from
Thursday and Friday, especially in the hills.

Discussion As of 08:37 am pdt Tuesday... A mix of Sun and
clouds across the region this morning as moisture continues to
advect inland ahead of an approaching system. Overall, should see
temperatures this afternoon near or slightly warmer than those
yesterday as any precipitation will likely stay north of the
region. However, can't rule out very light rain over the far
northern portions of the north bay through the day. Thus, will
keep the mention of precipitation across this area while the rest
of the region will remain dry. Have updated sky cover a bit to
reflect current trends with the greatest cloud cover likely across
the northern half of the region today while more Sun can be
expected across the central coast. Otherwise, the ongoing forecast
remains on track for the short-term. Please see previous forecast
discussion below for additional details.

Prev discussion As of 3:10 am pdt Tuesday... Showers moved
completely out of our CWA yesterday evening with mostly clear
skies now for most the area from sf southward. Satellite does show
higher clouds over the north bay. Temperatures will be a degree
or two warmer compared to yesterday -- mostly 60s to lower 70s.

Synoptically a system will move into the pac NW on Wednesday with
the far southern edge of moisture forecast to possibly go across
the north bay. Guidance has been trending slightly drier compared
to yesterday with a chunk of the models keeping virtually our
entire area now dry. Amounts will be minor -- less than a tenth
for most of the north bay with little to no accumulations
forecast for sf bay southward. In fact, totals may be close to
what we saw from the system on Monday.

A substantial change in the pattern will begin to take shape on
Thursday as a ridge of high pressure aloft beings to build toward
the coast. At the same time off to our east the flow will become
tighter and northerly as a system drops into the central conus
from canada. The amplification will continue to increase Friday
into Saturday as an upper low dives into the four corners region.

Winds will increase with breezy conditions likely Thursday into
Friday. Models have backed off a bit compared to previous runs, so
a little less concern for fire weather interests compared to 12
hours ago.

Closer to the surface a ridge of high pressure will move to our
region leading to warmer temperatures especially by the weekend.

Highs on Saturday and Sunday will be in the 70s to mid 80s for
most spots away from the coast. Should be enough of a sea breeze
to keep many beaches and locations right at the coast in the 60s
to lower 70s. Any rain chances will be well to our north.

The ridge will slowly advance to the coast and then flatten and
progress off to the east next work week. The storm track will stay
well to our north with warmer than normal temperatures likely.

Aviation As of 10:19 am pdt Tuesday... Mid and high level clouds
continue to stream in from the north ahead of the next system.

ExpectingVFR today with breezy conditions. CIGS will gradually
lower overnight with -ra poss at ksts early wed, but will only do
vcsh for koak and ksfo.

Vicinity of ksfo... Little change from previous forecast.VFR
through today. MVFR CIGS develop tonight/early Wednesday. A
passing shower poss early Wednesday.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Afternoon sea breeze. Lower cigs
return tonight with MVFR category.

Marine As of 10:17 am pdt Tuesday... Moderate to locally strong
northerly winds will prevail as high pressure remains anchored off
the coast. The strongest winds will likely occur monterey bay
southward along the immediate coast. Winds and seas will increase
over all coastal waters on Wednesday as high pressure
strengthens.

Mtr watches/warnings/advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm
sca... Mry bay from 12 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rgass
aviation: mm
marine: mm
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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 mi46 min WNW 5.1 G 6 57°F 1019.4 hPa
RCMC1 - 9414863 - Richmond, CA 23 mi52 min N 1.9 G 1.9 58°F 57°F1019.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 24 mi57 min NNW 8.9 57°F 1020 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 25 mi46 min W 5.1 G 7 59°F 1020 hPa
PRYC1 - 9415020 - Point Reyes, CA 25 mi46 min WNW 12 G 15 56°F 51°F1019.8 hPa
UPBC1 28 mi46 min WNW 16 G 17
MZXC1 - 9415102 - Martinez-Amorco CA 28 mi46 min W 12 G 15 57°F 58°F1019.5 hPa46°F
FTPC1 - 9414290 - San Francisco, CA 29 mi52 min SW 4.1 G 8 57°F 56°F1019.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 30 mi109 min WNW 8.9 58°F 1019 hPa49°F
46237 - San Francisco Bar, CA (142) 30 mi64 min 55°F6 ft
PXSC1 31 mi46 min 58°F 46°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 31 mi46 min NNW 7 G 8.9 57°F 1018.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi46 min NNW 6 G 8 57°F 1019.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 32 mi46 min W 8.9 G 11 57°F 58°F1019.1 hPa
OBXC1 32 mi46 min 58°F 46°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi46 min NNW 7 G 8
LNDC1 34 mi46 min NW 5.1 G 8 59°F 1019.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi44 min NW 12 G 14 53°F 53°F7 ft1019.7 hPa (+0.9)
AAMC1 - 9414750 - Alameda, CA 35 mi46 min NW 4.1 G 7 59°F 60°F1020 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 37 mi34 min WNW 14 G 18 54°F 53°F1020.5 hPa (+1.4)51°F

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA3 mi39 minW 710.00 miMostly Cloudy59°F48°F68%1019.6 hPa
Novato / Gnoss Field, CA6 mi39 minNNW 810.00 miPartly Cloudy61°F48°F63%1020 hPa
Napa, Napa County Airport, CA17 mi40 minWSW 610.00 miOvercast60°F46°F62%1018.3 hPa
Santa Rosa, Santa Rosa Sonoma County Airport, CA23 mi41 minSE 310.00 miMostly Cloudy59°F46°F64%1018.4 hPa

Wind History from DVO (wind in knots)
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Calm6NW10CalmN8
1 day agoNW11SW13
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2 days agoNW10
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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
Tue -- 01:22 AM PDT     6.72 feet High Tide
Tue -- 06:08 AM PDT     Moonrise
Tue -- 06:20 AM PDT     Sunrise
Tue -- 08:15 AM PDT     -0.11 feet Low Tide
Tue -- 02:03 PM PDT     5.95 feet High Tide
Tue -- 07:14 PM PDT     Moonset
Tue -- 07:56 PM PDT     Sunset
Tue -- 08:17 PM PDT     0.63 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.86.66.65.94.631.50.4-0.10.21.22.74.25.45.95.74.83.52.21.20.70.923.6

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Tue -- 12:36 AM PDT     -0.01 knots Slack
Tue -- 03:43 AM PDT     -0.85 knots Max Ebb
Tue -- 06:07 AM PDT     Moonrise
Tue -- 06:20 AM PDT     Sunrise
Tue -- 07:29 AM PDT     0.01 knots Slack
Tue -- 09:54 AM PDT     0.65 knots Max Flood
Tue -- 01:23 PM PDT     -0.00 knots Slack
Tue -- 03:58 PM PDT     -0.63 knots Max Ebb
Tue -- 07:06 PM PDT     0.00 knots Slack
Tue -- 07:13 PM PDT     Moonset
Tue -- 07:55 PM PDT     Sunset
Tue -- 09:38 PM PDT     0.82 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0.2-0.6-0.8-0.8-0.8-0.5-0.20.20.60.60.60.40.1-0.2-0.5-0.6-0.6-0.4-00.40.80.80.7

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 (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.