Tuesday, January23, 2018 L-36.com


Marine Weather and Tides
Novato, 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 7:19AMSunset 5:24PM Monday January 22, 2018 11:50 PM PST (07:50 UTC) Moonrise 10:37AMMoonset 10:58PM Illumination 40% Phase: Waxing Crescent; Moon at 6 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- 844 Pm Pst Mon Jan 22 2018
Tonight..NE winds 10 kt. Patchy fog after midnight.
Tue..NE winds 10 kt. Patchy fog in the morning.
Tue night..NE winds 10 kt.
Wed..SE winds 5 to 15 kt. Rain in the afternoon.
Wed night..SW winds 15 to 25 kt. Rain likely in the evening, then chance of showers after midnight.
Thu..SW winds 5 to 15 kt. Chance of showers, then slight chance of showers.
Fri..NW winds 10 kt.
Sat..N winds 5 kt.
PZZ500 844 Pm Pst Mon Jan 22 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A 1028 mb high centered 550 miles west of pt conception will bring light northwest winds to the coastal waters tonight. Southerly winds will develop over the northern waters Tuesday ahead of the next frontal system. Southerly winds will increase over the waters Wednesday then switch to moderate northwest Wednesday night after thge front goes by.

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 230602
afdmtr
area forecast discussion
national weather service san francisco bay area
1002 pm pst Mon jan 22 2018

Synopsis Anticipate partly cloudy skies tonight with patchy
fog developing in the valleys. Dry and seasonably cool weather
forecast Tuesday. Next front arrives weds morning or midday in the
north bay and then spreads rain southward later weds afternoon
into weds night for the bay area into the central coast. Steady
rain quickly turns to showers before sunrise Thursday. A round of
more organized showers is possible Thursday afternoon as the upper
low moves inland. Dry weather forecast Friday through the weekend
and into early next week.

Discussion As of 8:41 pm pst Monday... Showers across the
southern portion of the forecast area have dissipated however
abundant low level moisture persist. Satellite imagery reveals
cloudy conditions across the north and east bay to patchy clouds
anchored over the hill south of the bay area. The main concern for
tonight remains the possibility of fog development due to the
moist boundary layer and a strengthening inversion as result of a
building area of high pressure over the region.

Tuesday will bring a return of mild and dry weather after the morning
fog burns off. High clouds are anticipated to increase as the next
storm system approaches from the northwest. The forecast remains
on track... No updates expected.

From previous discussion... Run of the mill pacific frontal
passage on tap for weds. As has been the trend of late, the models
seem to be showing a less robust frontal passage. Latest timing
would bring steady frontal rains into the north bay later weds
morning or around midday. Front will then slide southward through
the bay area weds afternoon and evening. Similar to todays front,
the rain will weaken and become more disorganized by the time it
reaches the central coast. The north bay coastal hills will be the
winners once again with 1-2 inches of rain possible while amounts
will drop off sharply over the bay area and central coast. Winds
associated with the front will be fairly light too, some gusts in
the 25-35 mph range as the front passes through.

Any steady rain will quickly turn to showers before sunrise
Thursday. Cold air aloft and an associated shortwave are forecast
to pass through on Thursday afternoon. This should produce an
organized area of rain and isolated thunderstorms, especially
focused from about the santa cruz mtns northward. Some brief heavy
rain and small hail will be possible as this feature passes
through.

Dry weather returns Thursday night into Friday. Latest model
trends show above average confidence for dry conditions Friday
through the weekend and into early next week. Some of the gfs
solutions keep the storm track just to our north but ensembles
suggest another west coast ridge could become entrenched so the
wed-thu rain may be the last significant rainfall for awhile.

Aviation As of 10:00 pm pst Monday... Latest satellite imagery
shows clouds over the east and south bay spreading into the rest
of the sfo bay area under light northeast flow. Ceiling heights
mostly around 4000 feet but a couple of METAR sites are reporting
2200 foot. With abundanct low level moisture... CIGS are expected
to lower to 1000-1500 feet as the night wares on. There is some
concern about fog getting into sfo and oak as northeast flow
advects moisture from the valleys. But chances of that are low
since cloudcover should keep temperatures up. Low Sun angle will
result in slow clearing of the clouds so expect CIGS to be in
through early afternoon.

Vicinity of ksfo... MVFR CIGS after 08z. There is a small chance
that vsbys will drop down to 3-5 miles between 12z and 17z. Light
northeast winds.

Sfo bridge approach... CIGS over the east and south bay will spread
over the rest of the approach. CIGS lowering to MVFR range after
12z.

Monterey bay terminals... MVFR CIGS have redeveloped over the
salinas valley and will be spreading into mry. MVFR CIGS will then
last until 20z.

Marine As of 10:00 pm pst Monday... A 1028 mb high centered 550
miles west of pt conception will bring light northwest winds to
the coastal waters tonight. Southerly winds will develop over the
northern waters Tuesday ahead of the next frontal system.

Southerly winds will increase over the waters Wednesday then
switch to moderate northwest Wednesday night after thge front goes
by.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 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
sca... Rough bar advisory for sf bar
public forecast: cw
aviation: W pi
marine: W pi
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 16 mi51 min ENE 4.1 G 8 50°F 53°F1026.8 hPa (+0.6)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 16 mi57 min WNW 2.9 48°F 1027 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 18 mi57 min SSE 1.9 G 2.9 48°F 1027.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 18 mi51 min NE 8 G 8.9 50°F 1027.3 hPa (+0.5)
FTPC1 - 9414290 - San Francisco, CA 21 mi51 min N 8 G 9.9 50°F 53°F1027.1 hPa (+0.4)
PRYC1 - 9415020 - Point Reyes, CA 22 mi51 min NW 1 G 1.9 54°F1026.6 hPa (+0.3)
46237 - San Francisco Bar, CA (142) 22 mi51 min 53°F9 ft
PXOC1 - 9414311 - San Francisco (Pier 1), CA 23 mi51 min N 7 G 8 50°F 1026.2 hPa (+0.7)
PXSC1 23 mi51 min 51°F 47°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 24 mi51 min N 5.1 G 6 50°F 1027.1 hPa (+0.7)
OBXC1 24 mi51 min 51°F 46°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi51 min E 2.9 G 2.9
MZXC1 - 9415102 - Martinez-Amorco CA 25 mi51 min ESE 2.9 G 6 48°F 51°F1027.8 hPa (+0.7)48°F
AAMC1 - 9414750 - Alameda, CA 27 mi51 min SSE 1 G 4.1 50°F 55°F1027.2 hPa (+1.0)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 27 mi61 min E 7.8 G 12 51°F 54°F9 ft1026.9 hPa (+0.6)
LNDC1 27 mi57 min NE 6 G 9.9 51°F 1027.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 29 mi51 min E 5.1 G 6 48°F 51°F1027.7 hPa (+0.8)
SFXC1 - San Francisco Bay Reserve, CA 31 mi66 min WSW 1.9 42°F 1027 hPa41°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi51 min Calm G 1 50°F 1027.8 hPa (+0.7)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 39 mi41 min N 3.9 G 7.8 53°F 55°F1027.3 hPa47°F
RTYC1 - 9414523 - Redwood City, CA 46 mi51 min NW 6 G 7 51°F 55°F1027.5 hPa (+0.9)

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA4 mi76 minS 49.00 miPartly Cloudy46°F44°F93%1027.8 hPa
Petaluma Municipal Airport, CA11 mi56 minN 09.00 miPartly Cloudy45°F44°F100%1027.4 hPa
Napa, Napa County Airport, CA18 mi57 minE 38.00 miFair44°F42°F93%1026.6 hPa

Wind History from DVO (wind in knots)
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Last 24hrS5
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SE10SE7SE6SE5CalmCalmSE3CalmNW5NW6W8W75NW5SE4SE6
G11
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1 day agoCalmCalmCalmCalmCalmN4CalmS3CalmCalmNE3CalmCalmCalmSE4SW6
G12
SW8S6S7S8SE6SE5S7S8
2 days agoNW10NW5N8N10N9N9N114N5N13NW7NW9NW11NW13W5
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4CalmCalm

Tide / Current Tables for Hog Island, San Antonio Creek, San Pablo Bay, California
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Hog Island
Click for Map
Tue -- 05:45 AM PST     5.76 feet High Tide
Tue -- 07:21 AM PST     Sunrise
Tue -- 11:08 AM PST     Moonrise
Tue -- 12:31 PM PST     1.69 feet Low Tide
Tue -- 05:23 PM PST     Sunset
Tue -- 05:34 PM PST     4.53 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.81.42.53.74.85.65.75.44.73.82.82.11.71.82.33.13.94.44.54.23.62.821.4

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Tue -- 01:45 AM PST     0.75 knots Max Flood
Tue -- 05:38 AM PST     -0.00 knots Slack
Tue -- 07:20 AM PST     Sunrise
Tue -- 08:21 AM PST     -0.61 knots Max Ebb
Tue -- 11:07 AM PST     Moonrise
Tue -- 12:08 PM PST     0.00 knots Slack
Tue -- 02:17 PM PST     0.43 knots Max Flood
Tue -- 05:22 PM PST     Sunset
Tue -- 05:32 PM PST     -0.00 knots Slack
Tue -- 08:29 PM PST     -0.66 knots Max Ebb
Tue -- 11:53 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.70.70.60.40.2-0.1-0.4-0.6-0.6-0.5-0.3-00.30.40.40.30.1-0.1-0.4-0.6-0.6-0.5-0.3

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 (2,6,7,8)
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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.