Saturday, August19, 2017 L-36.com


Marine Weather and Tides
Santa Venetia, 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 6:27AMSunset 7:59PM Friday August 18, 2017 10:42 PM PDT (05:42 UTC) Moonrise 2:04AMMoonset 4:44PM Illumination 10% Phase: Waning Crescent; Moon at 27 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- 832 Pm Pdt Fri Aug 18 2017
.small craft advisory in effect from Saturday morning through late Saturday night...
Tonight..SW winds 10 to 20 kt.
Sat..SW winds 15 to 25 kt.
Sat night..SW winds 15 to 25 kt. Patchy fog after midnight.
Sun..SW winds 10 to 20 kt. Patchy fog in the morning.
Sun night..SW winds 10 to 20 kt. Patchy fog after midnight.
Mon..SW winds 5 to 15 kt.
Tue..SW winds 10 kt.
Wed..SW winds 10 kt.
PZZ500 832 Pm Pdt Fri Aug 18 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... As high pressure builds into the eastern pacific winds will increase especially for the northern outer waters. Locally steep wind waves will also accompany increasing winds.

7 Day Forecast for Marine Location Near Santa Venetia, CA
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location: 38.02, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 190352
afdmtr
area forecast discussion
national weather service san francisco bay area
852 pm pdt Fri aug 18 2017

Synopsis Look for one more day of minor warming this afternoon
as a ridge of high pressure continues to build into our region.

Minor cooling can be expected over the weekend into next week as
an upper level low and shortwave trough move into our region.

Overnight clouds can be expected especially along the coast.

Discussion As of 8:50 pm pdt Friday... Mostly clear skies
prevail inland this evening while widespread stratus engulf the
coast. Of note are scattered mid-level cloud moving in from the
east that emanated from thunderstorm that formed over the sierra
this afternoon and have since dissipated. Coastal stratus is
quickly filling in through coastal gaps and valley under a 1500
ft marine layer.

High pressure continued to strengthen today resulting in one last
day of warming across the region. While coastal areas cooled
slightly as a result of slow clearing low clouds along the
immediate coast, inland areas saw significantly warmer afternoon
highs from 24 hours ago. Areas around the bay warmed 3 to 5
degrees while inland temps saw anywhere from 5 to 10 degrees of
warming. Warmest inland areas experienced as much as 15 degrees of
warming. Coastal areas stayed in the 60s, 70s around the bay and
80s and 90s inland. Our warm spot today was pinnacles np with a
high of 98 degrees.

From previous discussion... Over the weekend an upper level low
will develop just off the coast of point conception. This will
allow for heights and thickness values over central and northern
california to decrease. We'll see afternoon temperatures across
the interior trend downward several degrees per day through the
weekend.

The main thought on many minds as we head into next week is the
cloud cover for Monday morning's solar eclipse. If conditions
permit, the partial solar eclipse can be viewed throughout
california. Right now, models are all in good agreement that the
upper level low will remain parked near point conception in
southern california. For us along the central coast and north to
the san francisco bay area, this yields a few outcomes. For one,
the low can help mix out the marine layer, resulting in mostly
clear conditions. On the other hand, the upper low could help to
enhance the marine layer depth. We'll know a little bit more over
the weekend and will continue to monitor the marine layer's
response to the trough. Climatologically, the best locations in
the bay area for clear skies on a mid late august morning would be
interior areas of the east bay away from the coast, as well as the
higher elevations in the santa cruz mountains, north bay
mountains, and diablo range. The eclipse of the Sun will begin
shortly after 9:00 am pdt for the bay area with peak obscuration
happening around 10:15 am pdt. Peak obscuration of the Sun will
range from 71 percent in monterey and up to 78 percent in santa
rosa.

Aviation As of 4:45 pm pdt Friday... Clouds are hugging most of the
coastline and with a nearly 3 mb west-to-east surface gradient
component, only a matter of time before it moves back to most
terminals. Guidance is running with a range of solutions however
generally went with middle of the road start times that would
still be earlier than this morning. CIGS forecast to be in the ifr
to low-end MVFR categories. Moderate confidence.

Vicinity of ksfo...VFR with winds up to 20 kt currently. Look for
cigs in the ifr MVFR category to return around 09z although
possibly earlier than that. Winds will diminish after 04z.

Moderate confidence.

Sfo bridge approach... Similar to ksfo although sct deck could
impact approach as early as 07z.

Monterey bay terminals... CIGS down to 005 forecast to return
around 0#z at kmry and later at ksns. Will stay ifr all night with
a return toVFR around 17-18z. Moderate confidence.

Marine As of 8:32 pm pdt Friday... As high pressure builds into
the eastern pacific winds will increase especially for the
northern outer waters. Locally steep wind waves will also
accompany increasing winds.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
public forecast: cw
aviation marine: bell
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 8 mi42 min SW 7 G 9.9 60°F 66°F1014.4 hPa (+1.0)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 9 mi50 min SSW 1.9 59°F 1015 hPa (+2.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 11 mi42 min SW 9.9 G 13 61°F 1014.7 hPa (+0.9)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 13 mi42 min SW 13 G 14 62°F 1013.6 hPa (+1.2)
FTPC1 - 9414290 - San Francisco, CA 15 mi42 min WSW 7 G 11 60°F 60°F1015 hPa (+0.7)
PXSC1 16 mi42 min 62°F 59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 16 mi48 min WSW 8 G 14 60°F 1013.5 hPa
OBXC1 17 mi42 min 61°F 59°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 17 mi42 min W 8 G 11 61°F 1014.6 hPa (+0.7)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi42 min W 6 G 7
46237 - San Francisco Bar, CA (142) 18 mi42 min 60°F4 ft
LNDC1 19 mi42 min WNW 6 G 8 62°F 1014.6 hPa (+0.6)
MZXC1 - 9415102 - Martinez-Amorco CA 20 mi42 min W 13 G 16 62°F 69°F1013.9 hPa (+1.5)59°F
AAMC1 - 9414750 - Alameda, CA 20 mi42 min WNW 5.1 G 8.9 62°F 69°F1015.1 hPa (+0.6)
PRYC1 - 9415020 - Point Reyes, CA 25 mi42 min W 2.9 G 4.1 62°F 61°F1014.4 hPa (+0.0)
PCOC1 - 9415144 - Port Chicago, CA 25 mi42 min W 19 G 21 64°F 71°F1012.9 hPa (+1.2)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi52 min SSW 1.9 G 7.8 59°F 59°F4 ft1014.7 hPa (+0.0)
SFXC1 - San Francisco Bay Reserve, CA 28 mi57 min W 11 63°F 1012 hPa58°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi42 min NW 15 G 21 67°F 1011.6 hPa (+0.8)
RTYC1 - 9414523 - Redwood City, CA 39 mi42 min NNW 5.1 G 7 64°F 73°F1013.7 hPa (+0.8)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 45 mi32 min W 1.9 G 3.9 55°F 55°F1014.9 hPa55°F

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA9 mi47 minNNW 510.00 miA Few Clouds59°F55°F88%1014.2 hPa
Petaluma Municipal Airport, CA17 mi47 minNW 510.00 miOvercast59°F57°F94%1014.6 hPa
Napa, Napa County Airport, CA18 mi48 minW 910.00 miFair61°F55°F84%1012.9 hPa
Concord, Buchanan Field, CA24 mi49 minWNW 610.00 miFair66°F55°F70%1011.8 hPa

Wind History from DVO (wind in knots)
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Last 24hrCalmCalmNW73CalmN5N5NW4NE5CalmCalm444N7N10N15N15N12
G17
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1 day agoN6NW5CalmCalmCalmCalmCalmSW3CalmCalm545N8
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CalmN10N9
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2 days agoCalmCalmSW4CalmN4CalmCalmCalmCalmSW4334SE7NE8SE74NE11N10N11N12N7N5
G10
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Tide / Current Tables for Gallinas, Gallinas Creek, San Pablo Bay, California
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Gallinas
Click for Map
Sat -- 04:08 AM PDT     Moonrise
Sat -- 05:39 AM PDT     -0.55 feet Low Tide
Sat -- 06:28 AM PDT     Sunrise
Sat -- 12:38 PM PDT     5.25 feet High Tide
Sat -- 05:30 PM PDT     2.04 feet Low Tide
Sat -- 06:37 PM PDT     Moonset
Sat -- 07:57 PM PDT     Sunset
Sat -- 11:38 PM PDT     6.92 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.35.13.41.70.3-0.4-0.5-00.923.34.45.15.24.63.72.72.12.12.73.74.966.8

Tide / Current Tables for Petaluma River Approach #3/#4, San Pablo Bay, California Current
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Petaluma River Approach #3/#4
Click for Map
Sat -- 03:11 AM PDT     -0.93 knots Max Ebb
Sat -- 04:07 AM PDT     Moonrise
Sat -- 06:28 AM PDT     Sunrise
Sat -- 06:45 AM PDT     0.00 knots Slack
Sat -- 09:28 AM PDT     0.62 knots Max Flood
Sat -- 01:23 PM PDT     -0.00 knots Slack
Sat -- 03:51 PM PDT     -0.47 knots Max Ebb
Sat -- 05:53 PM PDT     0.00 knots Slack
Sat -- 06:37 PM PDT     Moonset
Sat -- 07:57 PM PDT     Sunset
Sat -- 08:15 PM PDT     0.72 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.3-0.6-0.8-0.9-0.9-0.7-0.30.10.40.60.60.50.30.1-0.2-0.4-0.5-0.30.10.50.70.70.60.4

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.