Monday, May22, 2017 L-36.com


Marine Weather and Tides
Napa, 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 5:50AMSunset 8:21PM Monday May 22, 2017 10:35 AM PDT (17:35 UTC) Moonrise 3:00AMMoonset 3:49PM Illumination 9% 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- 902 Am Pdt Mon May 22 2017
.small craft advisory in effect from noon today to 9 pm pdt this evening...
Today..W to sw winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon..
Tonight..W to sw winds 15 to 25 kt...decreasing to 5 to 15 kt overnight..
Tue..SW winds 10 to 20 kt.
Tue night..SW winds 10 to 20 kt.
Wed..SW winds 15 to 25 kt.
Thu..SW winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
PZZ500 902 Am Pdt Mon May 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure building over the pacific northwest will maintain light to moderate northwesterly winds through midweek. Winds will increase midweek as a thermal trough develops along the coast tightening the pressure gradients over the northern outer waters. Strongest winds are expected over the outer waters while the inner waters remain mostly light.

7 Day Forecast for Marine Location Near Napa, CA
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location: 38.3, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 221511
afdmtr
area forecast discussion
national weather service san francisco bay area
811 am pdt Mon may 22 2017

Synopsis High pressure will maintain very warm and dry
conditions for inland areas through today. A shallow marine layer
and weak seabreeze will keep the coast seasonably cool. A cooling
trend is expected regionwide from Tuesday through Friday. Warming
is then expected for inland areas during the upcoming weekend.

Discussion As of 8:00 am pdt Monday... A boost in the depth of
the marine layer combined with a more pronounced onshore flow lead
to widespread clouds and patchy fog along the coast plus into the
salinas valley. Clouds are expected to burn back to the coast
later this morning. However, big question remains if sunshine will
make it to the coast or not. Will monitor conditions and provide
an update to the forecast if necessary.

Otherwise, main story for the week will be cooler conditions over
the next several days as the ridge of high pressure flattens out
as a low dives down from the northwest. Temperatures will start to
rebound by the weekend as a weak ridge rebuilds into our region.

Previous discussion An upper level ridge remains centered
along the west coast early this morning... Maintaining a warm
airmass across inland areas. However, the marine layer is deeper
this morning (about 1200 feet deep at fort ord) and onshore
pressure gradients are slightly greater. The result will be more
widespread morning low clouds and fog near the ocean and locally
into the coastal valleys, and cooler daytime temperatures in these
areas as well. Inland areas that remain isolated from the effects
of the marine layer will continue to be very warm today.

The upper level ridge is forecast to weaken on Tuesday and then
completely break down by Wednesday as an upper trough currently in
the gulf of alaska drops southeast and into the western united
states. These developments will result in robust cooling across
our entire region, especially inland, from Tuesday through
Thursday. Daytime highs will cool by as much as 20 degrees by
midweek. In addition, night and morning low clouds will be much
more widespread and persistent by midweek.

The upper trough will shift east by the weekend, allowing an upper
ridge to redevelop near the west coast. Modest warming is expected
inland over the weekend. However, moderate onshore flow will limit
weekend warming potential near the coast.

Aviation As of 4:35 am pdt Monday... For 12z tafs. The marine
layer persist at around 1200 ft this morning which allowed some
inland penetration of stratus overnight across the north bay and
down the salinas valley. Aside from widespread coastal status and
patchy fog... Mainly clear skies prevail over the interior. Low
clouds will push back to the coast by noon today making way for
clear skies through this afternoon over coastal terminals and late
tonight for the inland terminals. Winds will remain light through
the morning then increase this afternoon with the onset of the
seabreeze.

Vicinity of ksfo...VFR conditions expected to prevail through the
day however a slight chance of ifr CIGS this morning remains
possible but confidence remains low. Winds will remain light and
locally variable through the morning then increase this afternoon
with the onset of the seabreeze.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Lifr/vlifr CIGS expected through the
early morning with clearing expected around 15z-16z. Winds will
remain light and locally variable through the morning then
increase this afternoon with the onset of the seabreeze.

Marine As of 2:19 am pdt Monday... Light northwesterly winds
and seas will prevail through the first half of the work week as
high pressure persists over the eastern pacific. Northerly wind
and seas will increase midweek as a thermal trough develops along
the coast tightening the pressure gradients over the northern
outer waters. Strongest winds are expected over the outer waters
while the inner waters remain mostly light.

Mtr watches/warnings/advisories
Tday None.

Public forecast: bell/dykema
aviation: cw
marine: cw
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 15 mi111 min WNW 7 64°F 1014 hPa56°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 17 mi60 min W 6 G 8.9 57°F 1015.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 20 mi60 min WNW 15 G 18 57°F 65°F1015.1 hPa56°F
UPBC1 20 mi60 min NW 12 G 15
PCOC1 - 9415144 - Port Chicago, CA 21 mi60 min W 11 G 15 60°F 64°F1014.6 hPa
RCMC1 - 9414863 - Richmond, CA 27 mi60 min S 5.1 G 7 55°F 58°F1015.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi60 min NW 12 G 16 64°F 1013.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi60 min SSW 8.9 G 13 54°F 1016 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 30 mi49 min SSE 9.9 56°F 1016 hPa
OBXC1 34 mi60 min 55°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 34 mi60 min NNW 2.9 G 4.1 55°F 1015.8 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi60 min ENE 2.9 G 4.1 55°F 1014.6 hPa
PXSC1 35 mi60 min 57°F 53°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 35 mi60 min Calm G 1
LNDC1 35 mi60 min WSW 2.9 G 5.1 56°F 1015.7 hPa
FTPC1 - 9414290 - San Francisco, CA 36 mi60 min W 4.1 G 8 51°F 53°F1016.2 hPa
AAMC1 - 9414750 - Alameda, CA 37 mi60 min SW 2.9 G 4.1 56°F 64°F1016.2 hPa
46237 - San Francisco Bar, CA (142) 40 mi66 min 55°F4 ft
PRYC1 - 9415020 - Point Reyes, CA 42 mi60 min E 1 G 4.1 54°F 54°F1015.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 48 mi106 min SSW 3.9 G 5.8 50°F 54°F4 ft1015.8 hPa (+1.1)

Wind History for Martinez-Amorco Pier, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Napa, Napa County Airport, CA6 mi42 minSSW 610.00 mi62°F55°F78%1014.5 hPa
Petaluma Municipal Airport, CA17 mi61 minN 09.00 miFair57°F53°F88%1015.6 hPa
Novato / Gnoss Field, CA18 mi41 minVar 310.00 miFair63°F51°F68%1015.6 hPa
Vacaville Nut Tree Airport, CA18 mi43 minVar 510.00 miFair83°F57°F41%1014.1 hPa
Fairfield / Travis Air Force Base, CA19 mi38 minWSW 1010.00 miFair74°F53°F49%1014.2 hPa

Wind History from APC (wind in knots)
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Last 24hrSW4SW6SW5SW6S8SW8S10S8S9S6S8S6S6S7S10S5CalmCalmW4S4S5SW33SW6
1 day agoSW5S6SW6S7S6S9SW9W11W10W10CalmSW7S5CalmS5CalmCalmCalmCalmCalmCalmCalm3S4
2 days agoSW5SW6SW7SW7SW10S7SW10SW8SW7SW9SW7S3SE3SW4SW6CalmCalmCalmCalmCalmN3CalmCalm3

Tide / Current Tables for Napa, Napa River, Carquinez Strait, California
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Napa
Click for Map
Mon -- 04:00 AM PDT     Moonrise
Mon -- 05:52 AM PDT     Sunrise
Mon -- 06:20 AM PDT     0.62 feet Low Tide
Mon -- 12:04 PM PDT     5.78 feet High Tide
Mon -- 04:49 PM PDT     Moonset
Mon -- 06:03 PM PDT     0.95 feet Low Tide
Mon -- 08:19 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.96.35.13.62.21.20.70.81.72.94.35.35.85.54.73.52.31.30.91.32.545.56.8

Tide / Current Tables for Mare Island Strait, So Vallejo, San Pablo Bay, California Current
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Mare Island Strait
Click for Map
Mon -- 01:52 AM PDT     -2.12 knots Max Ebb
Mon -- 04:00 AM PDT     Moonrise
Mon -- 05:52 AM PDT     Sunrise
Mon -- 05:55 AM PDT     0.00 knots Slack
Mon -- 09:06 AM PDT     1.28 knots Max Flood
Mon -- 11:53 AM PDT     -0.00 knots Slack
Mon -- 01:49 PM PDT     -1.66 knots Max Ebb
Mon -- 04:48 PM PDT     Moonset
Mon -- 05:22 PM PDT     0.00 knots Slack
Mon -- 08:19 PM PDT     Sunset
Mon -- 08:49 PM PDT     1.88 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.8-1.9-2.1-2-1.5-0.80.10.71.11.31.10.7-0.2-1.3-1.7-1.5-1-0.30.51.31.81.91.60.9

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 (13,3,4,5)
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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.