Monday, August21, 2017 L-36.com


Marine Weather and Tides
Napa, 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 6:28AMSunset 7:54PM Monday August 21, 2017 6:33 PM PDT (01:33 UTC) Moonrise 5:20AMMoonset 7:06PM 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- 202 Pm Pdt Mon Aug 21 2017
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..W winds 10 to 20 kt.
Tue..SW winds 10 to 20 kt.
Tue night..SW winds 10 to 20 kt.
Wed..SW winds 5 to 15 kt.
Wed night..SW winds 10 to 20 kt.
Thu..SW winds 5 to 15 kt.
Fri..SW winds 10 kt.
Sat..SW winds 10 kt.
PZZ500 202 Pm Pdt Mon Aug 21 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Weak low pressure over the coastal waters will continue to yield light to moderate winds through midweek. High pressure will develop for the second half of the week and cause the coastal pressure gradient to tighten. This is forecast to bring strong to near gale northerly winds and associated large steep seas. No long period swell is expected for the next 7 days.

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 220036
afdmtr
area forecast discussion
national weather service san francisco bay area
536 pm pdt Mon aug 21 2017

Synopsis Cooler than average temperatures, especially inland,
will persist through midweek with low clouds in the overnight and
early morning near the coast and in the valleys. An inland warming
trend is then likely late in the week and into the upcoming weekend
as high pressure builds back over the region.

Discussion As of 01:55 pm pdt Monday... Temperatures are
running up to 6 degrees cooler compared to 24 hours ago as low
clouds persist over the region. This is a result of the deep
marine layer holding on strong at more than 2,000 feet in depth.

While low clouds are finally clearing inland and from the south
off of the big sur coast, do expect a return of stratus again
overnight as a mid upper level low sits off of the southern
california coast. Overall, this will bring about temperatures that
are generally below seasonal averages through midweek.

By midweek and into the upcoming weekend high pressure centered over
the four corners region will begin to build toward the california
coast. This will result in a warming trend, especially for inland
areas, with temperatures rebounding back to or slightly above
seasonal averages. Look for more widespread 80s and 90s inland
during the afternoon hours under mostly sunny skies. This building
ridge will likely compress the marine layer as well with less inland
penetration of stratus late in the forecast period. Meanwhile,
coastal areas will likely remain in the 60s to 70s as onshore flow
persists.

Aviation As of 5:05 pm pdt Monday... For 00z tafs. Clearing
continues at the hour with ksts just having cleared over the north
bay. CIGS are anticipated to return early this evening under a
deep 2200 ft marine layer and moderate onshore flow. Also of note
is a line of clouds moving in from the east. Radar depicts a few
showers associated with these clouds however they are quickly
dissipating and not anticipated to bring showers to any terminals
at this time. Winds will remain light to moderate through this
evening then will gradually dissipate overnight.

Vicinity of ksfo...VFR conditions will prevail through early
evening then return around 04z tonight. BorderlineVFR MVFR cigs
expected through tonight with clearing anticipated around 18z
Tuesday morning. Light to moderate west winds will prevail.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions will prevail through
late this afternoon with low clouds anticipated to return around
02z-03z tonight.VFR CIGS expected through tonight with clearing
anticipated around 19z Tuesday morning. Moderate west winds will
ease overnight becoming light.

MVFR ifr through through early afternoon.

There is a distinct chance that mry never breaks today. Sns should
see a bit of clearing by afternoon, but clouds will remain around
the area and come back early this evening.

Marine As of 05:16 pm pdt Monday... Weak low pressure over the
coastal waters will continue to yield light to moderate winds
through midweek. High pressure will develop for the second half of
the week and cause the coastal pressure gradient to tighten. This
is forecast to bring strong to near gale northerly winds and
associated large steep seas. No long period swell is expected for
the next 7 days.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
public forecast: rgass
aviation: cw
marine: bam
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 mi109 min W 15 74°F 1014 hPa61°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 17 mi46 min SW 15 G 18 67°F 1015.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 20 mi46 min SW 14 G 17 68°F 69°F1015.7 hPa59°F
PCOC1 - 9415144 - Port Chicago, CA 21 mi46 min WSW 13 G 19 70°F 69°F1015.3 hPa
RCMC1 - 9414863 - Richmond, CA 27 mi46 min SE 2.9 G 9.9 65°F 65°F1016.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi46 min WSW 8.9 G 14 66°F 1016.5 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi46 min WNW 12 G 16 73°F 1014.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 30 mi57 min WNW 5.1 64°F 1016 hPa
OBXC1 34 mi46 min 64°F 60°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 34 mi46 min WNW 9.9 G 13 63°F 1016.4 hPa
PXSC1 35 mi46 min 66°F 59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi46 min SW 4.1 G 14 65°F 1015.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 35 mi46 min W 8 G 12
LNDC1 35 mi46 min W 9.9 G 13 65°F 1016.3 hPa
FTPC1 - 9414290 - San Francisco, CA 36 mi46 min W 5.1 G 11 62°F 62°F1016.7 hPa
AAMC1 - 9414750 - Alameda, CA 37 mi46 min W 5.1 G 8.9 66°F 69°F1016.8 hPa
46237 - San Francisco Bar, CA (142) 40 mi64 min 60°F4 ft
PRYC1 - 9415020 - Point Reyes, CA 42 mi46 min ESE 4.1 G 6 65°F 62°F1016.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 48 mi44 min SSW 3.9 G 3.9 61°F 62°F4 ft1016.8 hPa (-0.5)

Wind History for Martinez-Amorco Pier, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Napa, Napa County Airport, CA6 mi40 minSSW 1510.00 miFair71°F59°F66%1014.4 hPa
Petaluma Municipal Airport, CA17 mi39 minWNW 7 G 1310.00 miFair70°F59°F69%1016.3 hPa
Novato / Gnoss Field, CA18 mi59 minWSW 1010.00 miFair72°F57°F61%1015.9 hPa
Vacaville Nut Tree Airport, CA18 mi41 minSSW 1010.00 miFair84°F59°F43%1013.1 hPa
Fairfield / Travis Air Force Base, CA19 mi36 minWSW 22 G 2610.00 miFair and Breezy76°F58°F55%1013.8 hPa

Wind History from APC (wind in knots)
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Last 24hrS11W9W14W14
G21
W12W10W14W11W10W10NW10W10W11W8W9W8SW8W7W6SW12SW15S17SW13S15
1 day agoS16SW12W9W9W9W7W7W53W5NW5NW4NW5NW3SW4W5--S8S14S14S18
G23
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G24
S18S16
2 days agoS14S12--W9W7W8W8W10W8W7W7NW6NW8NW8W8W7SW9S10S12S15S14S16S18S15

Tide / Current Tables for Napa, Napa River, Carquinez Strait, California
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Napa
Click for Map
Mon -- 01:29 AM PDT     8.18 feet High Tide
Mon -- 06:20 AM PDT     Moonrise
Mon -- 06:29 AM PDT     Sunrise
Mon -- 08:37 AM PDT     -0.70 feet Low Tide
Mon -- 11:31 AM PDT     New Moon
Mon -- 03:00 PM PDT     6.98 feet High Tide
Mon -- 07:54 PM PDT     Sunset
Mon -- 08:05 PM PDT     Moonset
Mon -- 08:40 PM PDT     1.83 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.18.18.17.35.83.81.80.3-0.6-0.60.21.63.35.16.476.65.54.12.821.92.64

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 -- 01:22 AM PDT     -0.00 knots Slack
Mon -- 04:18 AM PDT     -2.52 knots Max Ebb
Mon -- 06:20 AM PDT     Moonrise
Mon -- 06:29 AM PDT     Sunrise
Mon -- 08:28 AM PDT     0.00 knots Slack
Mon -- 11:31 AM PDT     New Moon
Mon -- 12:09 PM PDT     1.51 knots Max Flood
Mon -- 03:05 PM PDT     -0.00 knots Slack
Mon -- 05:04 PM PDT     -1.43 knots Max Ebb
Mon -- 07:53 PM PDT     Sunset
Mon -- 08:00 PM PDT     0.00 knots Slack
Mon -- 08:04 PM PDT     Moonset
Mon -- 11:15 PM PDT     1.68 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.4-0.9-2-2.5-2.5-2.1-1.4-0.50.411.41.51.40.80.1-1-1.4-1.3-0.8-00.81.41.7

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 (21,6,7,8)
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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.