Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Novato, 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 6:15AMSunset 7:59PM Thursday April 27, 2017 12:14 AM PDT (07:14 UTC) Moonrise 6:31AMMoonset 8:38PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 854 Pm Pdt Wed Apr 26 2017
.small craft advisory in effect until 3 am pdt Thursday...
Tonight..W winds 10 to 20 kt.
Thu..NW winds 5 to 15 kt.
Thu night..W winds 10 to 20 kt.
Fri..NW winds 5 to 15 kt.
Fri night..NW winds 10 to 20 kt.
Sat..W winds 5 to 15 kt.
Sun..W winds 5 kt...increasing to 5 to 15 kt.
Mon..NW winds 5 to 15 kt.
PZZ500 854 Pm Pdt Wed Apr 26 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwesterly winds will increase over the coastal waters tonight and Thursday as high pressure over the eastern pacific builds over northern california. Strong high pressure will then continue to extend eastward and southward over nevada this weekend. Stronger winds will result in steep wind waves and fresh swell with hazardous sea conditions possibly persisting into the weekend.

7 Day Forecast for Marine Location Near Novato, CA
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location: 38.1, -122.59     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 270553
afdmtr
area forecast discussion
national weather service san francisco bay area
1053 pm pdt Wed apr 26 2017

Synopsis Isolated showers have ended in most areas, but remain
a possibility over the hills from santa clara county southward
this evening. Otherwise, dry weather is forecast through the
weekend and into next week. Locally breezy conditions are
expected over the next couple of days. Strongest winds will be
near the coast during the afternoon and early evening hours, and
in the hills late night and morning hours. A warming trend is
forecast through the weekend and into early next week as high
pressure builds over the region.

Discussion As of 8:50 pm pdt Wednesday... Kmux radar indicates
isolated light showers over the southern diablo range at the
present time. The latest WRF and hrrr models forecast continued
isolated shower activity across the southern diablo range and over
the hills of monterey and san benito counties through late
evening. But for the most part, dry weather is expected overnight.

Dry weather is then forecast regionwide for the remainder of the
week, through the upcoming weekend, and on into next week. In
addition, expect much warmer temperatures by the weekend, with
warm, dry weather expected to continue into next week as high
pressure builds over california. But before the warmest weather
develops, our region will experience blustery conditions for the
remainder of the work week, with locally gusty winds at the coast
and in the hills.

An upper low is forecast to gradually deepen over the
intermountain west over the next few days. Meanwhile, an upper
level ridge will be amplifying off the west coast. In between
these two pressure centers, brisk northwest flow will develop
across california. West to northwest winds will increase along our
coast on Thursday afternoon and remain gusty through Thursday
evening. Coastal wind gusts as high as 35 mph are possible during
this time. Winds will then gradually decrease near the coast on
Thursday night, but at the same time north winds will increase in
the hills. Wind gusts up to 40 mph are possible across elevations
above 1000 feet late Thursday night and Friday morning.

This same wind cycle is forecast to repeat from Friday afternoon
through Saturday morning, with another round of brisk winds
expected near the coast Friday afternoon and evening, and in the
hills late Friday night and Saturday morning. Although locally
blustery conditions are forecast over the next couple of days,
winds are expected to remain below advisory levels in most areas.

Winds will decrease in all areas by Saturday afternoon.

Temperatures will warm over the next few days as drier air moves
in and we see more sunshine. But the most robust warming will
occur on Saturday as the upper ridge offshore begins to build
eastward over california. By Saturday highs will warm into the
70s near the coast and into the lower 80s inland. Saturday's highs
will be as much as 15-20 degrees warmer than today. A shortwave
trough moving over the top of the ridge over the weekend may stall
the warming trend on Sunday, but then renewed warming is
anticipated as we move through the first half of next week.

Aviation As of 10:53 pm pdt Wednesday... W-nw winds have
generally trended higher for a while this evening likely in
association with a cool front sliding southeastward over the bay
area; pressure falls/rises have been reported by area metars this
evening. Present wet pattern is light and mostly under kmux radar
though weak returns have been more recently showing up from santa
clara county to monterey and san benito counties. 06z tafs
indicate generally improving conditions north-south as drier air
eventually works its way in over the bay area preceded by a little
bit more of either spotty light rain or drizzle.

Vicinity of ksfo... W-nw winds have helped increase mixing and lift
cigs somewhat later this evening. Peak gusts to 30 knots back near
04z this evening is likely the cool front as pressure falls/rises
were also observed. Newest run of the WRF model continues to lean
toward a gradual reduction in humidity for the overnight hours.

Overall conditions should continue to improve back towardVFR
Thursday morning. Gusty w-nw winds will probably hold for much of
Thursday.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr as moisture preceding a cool front will
consolidate this evening producing off/on showers or drizzle tonight.

Clearing Thursday with MVFR/vfr probably returning mid-late morning.

Marine As of 10:05 pm pdt Wednesday... Northwesterly winds will
increase over the coastal waters tonight and Thursday as high
pressure over the eastern pacific builds over northern california.

Strong high pressure will then continue to extend eastward and
southward over nevada this weekend. Stronger winds will result in
steep wind waves and fresh swell with hazardous sea conditions
possibly persisting into the weekend.

Mtr watches/warnings/advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm from 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm from 3 am
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Sf bay until 3 am
public forecast: dykema
aviation/marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 16 mi45 min NW 9.9 G 15 56°F 58°F1016.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi45 min W 9.9 G 13 56°F 1016.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi45 min WNW 15 G 20 57°F 1017 hPa
FTPC1 - 9414290 - San Francisco, CA 21 mi45 min WSW 8.9 G 13 55°F 55°F1017.6 hPa
PRYC1 - 9415020 - Point Reyes, CA 22 mi45 min WNW 21 G 29 55°F 54°F1017.9 hPa
46237 - San Francisco Bar, CA (142) 22 mi45 min 54°F6 ft
PXOC1 - 9414311 - San Francisco (Pier 1), CA 23 mi45 min WSW 8 G 13 55°F 1016.3 hPa
PXSC1 23 mi45 min 56°F 53°F
OBXC1 24 mi45 min 56°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 24 mi45 min WNW 5.1 G 7 56°F 1017.2 hPa
UPBC1 25 mi45 min W 9.9 G 13
MZXC1 - 9415102 - Martinez-Amorco CA 25 mi45 min WSW 8.9 G 13 60°F1016.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi45 min W 5.1 G 8
AAMC1 - 9414750 - Alameda, CA 27 mi45 min W 7 G 8.9 56°F 61°F1017.5 hPa
LNDC1 27 mi45 min W 5.1 G 6 57°F 1017.1 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 27 mi85 min NW 18 G 21 54°F 53°F5 ft1017.9 hPa (+0.5)
PCOC1 - 9415144 - Port Chicago, CA 29 mi45 min SW 11 G 13 56°F 60°F1016.2 hPa
SFXC1 - San Francisco Bay Reserve, CA 31 mi90 min WNW 11 54°F 1016 hPa53°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi45 min WNW 11 G 15 58°F 1015.6 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 39 mi35 min 23 G 29 54°F 55°F1018.5 hPa51°F
RTYC1 - 9414523 - Redwood City, CA 46 mi45 min W 12 G 15 56°F 64°F1017.3 hPa
46214 - Point Reyes, CA (029) 48 mi45 min 56°F8 ft

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA4 mi20 minW 7 G 1910.00 miFair57°F50°F77%1017.3 hPa
Napa, Napa County Airport, CA18 mi21 minW 1110.00 miFair55°F52°F90%1015.6 hPa

Wind History from DVO (wind in knots)
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Last 24hrNW4CalmSW6SW5SW7CalmNE3SW3CalmSW5SW6SW5W4
G14
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G14
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G17
SW8W11
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NW9Calm--W10
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1 day agoW9
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Calm6NW10CalmN8NW12W8
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2 days agoW16
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W5SW4SW4S5SW4SW7SW7SW9
G14
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Tide / Current Tables for Hog Island, San Antonio Creek, San Pablo Bay, California
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Hog Island
Click for Map
Thu -- 02:12 AM PDT     6.77 feet High Tide
Thu -- 06:18 AM PDT     Sunrise
Thu -- 07:31 AM PDT     Moonrise
Thu -- 09:23 AM PDT     -0.84 feet Low Tide
Thu -- 03:29 PM PDT     5.47 feet High Tide
Thu -- 07:58 PM PDT     Sunset
Thu -- 09:23 PM PDT     1.14 feet Low Tide
Thu -- 09:37 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.76.16.76.65.74.32.71-0.2-0.8-0.70.31.73.24.65.45.44.83.82.61.71.21.32.3

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Thu -- 01:48 AM PDT     -0.01 knots Slack
Thu -- 05:03 AM PDT     -0.98 knots Max Ebb
Thu -- 06:17 AM PDT     Sunrise
Thu -- 07:31 AM PDT     Moonrise
Thu -- 09:08 AM PDT     0.00 knots Slack
Thu -- 11:37 AM PDT     0.63 knots Max Flood
Thu -- 03:16 PM PDT     -0.00 knots Slack
Thu -- 05:41 PM PDT     -0.52 knots Max Ebb
Thu -- 07:57 PM PDT     Sunset
Thu -- 08:29 PM PDT     0.00 knots Slack
Thu -- 09:37 PM PDT     Moonset
Thu -- 11:04 PM PDT     0.84 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.3-0.1-0.5-0.9-1-0.9-0.7-0.4-0.10.40.60.60.50.30.1-0.2-0.5-0.5-0.4-0.20.20.60.8

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 (3,6,7,8)
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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.