Wednesday, June28, 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 5:47AMSunset 8:38PM Wednesday June 28, 2017 10:20 AM PDT (17:20 UTC) Moonrise 10:00AMMoonset 11:16PM Illumination 22% Phase: Waxing Crescent; Moon at 5 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 840 Am Pdt Wed Jun 28 2017
Today..W winds 5 to 15 kt. Patchy fog late in the morning.
Tonight..W winds 5 to 15 kt. Patchy fog after midnight.
Thu..W winds 10 kt...increasing to 10 to 20 kt in the afternoon. Patchy fog in the morning.
Thu night..W winds 15 to 25 kt. Patchy fog after midnight.
Fri..W winds 10 to 20 kt. Patchy fog in the morning. Patchy fog after midnight.
Sat..SW winds 5 to 15 kt. Patchy fog.
Sun..SW winds 10 kt. Patchy fog.
PZZ500 840 Am Pdt Wed Jun 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northerly winds will continue to increase along the central coast as high pressure builds off the coast. Gusty winds will result in hazardous sea conditions with steep wind waves and fresh swell.

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 281549
afdmtr
area forecast discussion
national weather service san francisco bay area
849 am pdt Wed jun 28 2017

Synopsis Marine air and stratus filtering inland on onshore winds
will persist causing near to slightly cooler than normal temperatures
today. Somewhat warmer temperatures will develop Thursday and Friday.

Except for patchy coastal drizzle, dry weather will persist over the
next 7 days. Night and morning coastal clouds will be followed by sunny
afternoons.

Discussion As of 8:49 am pdt Wednesday... Marine layer around
2000 feet deep this morning with stratus covering most of the
valleys. Onshore gradients around 2 mb but with ridge
strengthening slightly should allow for low clouds to clear back
to the coast by late morning. Looking over the current forecast
sky and temperature grids not seeing any reason for updates. Ridge
to strengthen slightly on Thursday should compress the marine
layer closer to 1500 feet with a little less inland penetration of
stratus for Thursday morning. Temperatures will run near or
slightly below normal today and then trend a few degrees warmer
inland for Thursday. Next shortwave upper trough approaches late
Friday evening and will likely induce a strong seabreeze and
deepening of the marine layer. In general the next 7 days through
the 4th of july holiday looks seasonable for late june early july
with night and morning low clouds followed by sunny and warm
afternoons.

Prev discussion As of 3:37 am pdt Wednesday... It's a fairly typical
summer stratus and fog pattern over the bay area and north central
coast this morning. The sfo-sac pressure gradient is 2.6 mb resulting
in onshore winds carrying ocean based stratus inland this morning in
a marine layer 1500-2000 feet deep. In addition to patchy fog, patchy
light drizzle has also been reported along the immediate coastline
since late last evening.

An upper level geopotential height ridge over the eastern pacific will
gradually advance toward the area late this week. Nearly stationary
lower to mid level thermal ridging over california will tend to
merge with the height ridge steadily strengthening the height ridge
as well as marine inversions through late week, and likely compress
inversions causing more favorable conditions for fog. Diurnal
warming contrasts between land and ocean will strengthen the
afternoon and evening sea-breezes causing stratus and fog to move
inland each night and morning; patchy dense fog may become more
favorable at times, mainly night-time and morning, from late week
into this weekend.

Aviation As of 04:35 am pdt Wednesday... For 12z tafs. It's
summer and the marine layer is strong. Low clouds filled back in
overnight at all terminals. Better defined layer than 24 hours ago
with higher cig heights. CIGS range from ifr to MVFR. Will follow
a more standard burnoff 17-18z.VFR this afternoon with lingering
cigs along the coast. CIGS return tonight.

Moderate confidence.

Vicinity of ksfo... MVFR CIGS through 17-18z. Sfo currently showing
only a bkn at 3k ft, but will put low cig in TAF as it should
lower by sunrise. Gusty winds up to 25 kt this afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr CIGS through 17-18z, but fog seems
less likely. VFR this afternoon.

Marine As of 08:38 am pdt Wednesday... Moderate to locally
strong northerly winds will prevail along the central coast as
high pressure builds off the coast. Gusty winds will result in
hazardous conditions with steep wind waves and fresh swell.

Mtr watches warnings advisories
Tday Sca... Pt reyes to pigeon pt 0-10 nm from 3 pm
sca... Pigeon pt to pt pinos 0-10 nm from 3 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 3 pm
sca... Mry bay from 3 pm
sca... Sf bay from 11 am
public forecast: rww
aviation: bam
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 mi96 min WNW 11 62°F 1013 hPa56°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 17 mi51 min WSW 11 G 17 59°F 1013.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 20 mi51 min WNW 11 G 13 63°F 69°F1013.5 hPa57°F
UPBC1 20 mi51 min WNW 8.9 G 12
PCOC1 - 9415144 - Port Chicago, CA 21 mi51 min WSW 6 G 8.9 64°F 69°F1013.2 hPa
RCMC1 - 9414863 - Richmond, CA 27 mi51 min S 8.9 G 14 56°F 63°F1014.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi51 min WNW 12 G 15 66°F 1012.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi51 min SSW 9.9 G 15 57°F 1014.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 30 mi64 min SSE 7 55°F 1014 hPa
OBXC1 34 mi51 min 57°F 55°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 34 mi51 min SSW 7 G 9.9 57°F 1014.5 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi51 min WSW 4.1 G 8.9 56°F 1013.5 hPa
PXSC1 35 mi51 min 57°F 55°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 35 mi51 min SW 9.9 G 12
LNDC1 35 mi57 min SW 6 G 9.9 56°F 1014.6 hPa
FTPC1 - 9414290 - San Francisco, CA 36 mi51 min SW 6 G 8.9 55°F 58°F1014.7 hPa
AAMC1 - 9414750 - Alameda, CA 37 mi51 min WSW 7 G 9.9 56°F 67°F1015.1 hPa
46237 - San Francisco Bar, CA (142) 40 mi51 min 57°F5 ft
PRYC1 - 9415020 - Point Reyes, CA 42 mi51 min NW 13 G 18 55°F 55°F1014 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 48 mi91 min WNW 14 G 19 54°F 56°F6 ft1014.5 hPa (+1.6)

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 mi27 minSW 1010.00 miOvercast63°F54°F73%1013.1 hPa
Petaluma Municipal Airport, CA17 mi26 minN 010.00 mi61°F53°F77%1014.2 hPa
Novato / Gnoss Field, CA18 mi46 minN 010.00 miMostly Cloudy59°F53°F82%1014.2 hPa
Vacaville Nut Tree Airport, CA18 mi28 minSSW 310.00 miFair72°F55°F57%1012.5 hPa
Fairfield / Travis Air Force Base, CA19 mi23 minWSW 1610.00 miFair66°F53°F64%1012.8 hPa

Wind History from APC (wind in knots)
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Last 24hrS9SW11S12S12S17
G20
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SW14SW14SW15SW12W9W8W8W5N5NW5W4W6NW7W4SW8SW8SW10
1 day agoW12W12W15
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W9W11W8W5W6W7W8NW4NW4NW5W5SW8
2 days agoW12W13W13SW11S15SW14SW15W13W14W14W12W11W9W11W10W13W14W14W15W14W14W13W13W12

Tide / Current Tables for Napa, Napa River, Carquinez Strait, California
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Napa
Click for Map
Wed -- 12:00 AM PDT     2.35 feet Low Tide
Wed -- 05:15 AM PDT     7.09 feet High Tide
Wed -- 05:48 AM PDT     Sunrise
Wed -- 11:00 AM PDT     Moonrise
Wed -- 12:27 PM PDT     -0.63 feet Low Tide
Wed -- 07:08 PM PDT     6.85 feet High Tide
Wed -- 08:36 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.42.83.85.16.47.16.96.14.731.30.1-0.6-0.50.31.73.456.36.86.65.84.63.4

Tide / Current Tables for Mare Island Strait, So Vallejo, San Pablo Bay, California Current
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Mare Island Strait
Click for Map
Wed -- 02:18 AM PDT     1.42 knots Max Flood
Wed -- 05:11 AM PDT     -0.00 knots Slack
Wed -- 05:48 AM PDT     Sunrise
Wed -- 07:54 AM PDT     -2.41 knots Max Ebb
Wed -- 11:00 AM PDT     Moonrise
Wed -- 12:16 PM PDT     0.00 knots Slack
Wed -- 04:08 PM PDT     1.55 knots Max Flood
Wed -- 07:19 PM PDT     -0.00 knots Slack
Wed -- 08:35 PM PDT     Sunset
Wed -- 09:20 PM PDT     -1.36 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.51.11.41.30.90.2-1.1-2.1-2.4-2.3-1.9-1.2-0.30.61.11.41.51.410.2-0.7-1.3-1.3-0.9

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.