Monday, March18, 2019 L-36.com


Marine Weather and Tides
Diablo, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:13AMSunset 7:19PM Monday March 18, 2019 6:36 PM PDT (01:36 UTC) Moonrise 3:45PMMoonset 4:58AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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 The San Francisco Bay North Of The Bay Bridge- 217 Pm Pdt Mon Mar 18 2019
Rest of today..E winds 5 to 15 kt.
Tonight..SW winds 5 to 15 kt.
Tue..SW winds 5 to 15 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 15 kt. Showers likely.
Wed..SW winds 5 to 15 kt with gusts up to 25 kt. Showers likely.
Wed night..W winds 10 to 20 kt with gusts up to 25 kt. A chance of showers.
Thu..W winds 10 to 20 kt with gusts up to 25 kt.
Fri..SW winds 5 to 10 kt. Showers likely.
PZZ500 217 Pm Pdt Mon Mar 18 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will become more southerly into this evening ahead of an approaching low pressure system moving in from the west. Southerly winds will increase along with rain chances on Tuesday as a cold front moves through the region. Winds will turn back out of the west to northwest on Wednesday. A long period westerly swell will arrive tomorrow, increasing shoaling on bars and harbor entrances is anticipated.


7 Day Forecast for Marine Location Near Diablo, CA
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location: 37.87, -121.91     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 190113 cca
afdmtr
area forecast discussion... Corrected aviation discussion
national weather service san francisco bay area
607 pm pdt Mon mar 18 2019

Synopsis A marine layer has developed and stratus now covers
much of the coast. Otherwise skies are mostly clear. Low
cloudiness will extend locally inland around the bays overnight
and then on Tuesday mid and high cloudiness will spread in ahead
of an approaching pacific weather system. A cooling trend will
begin, with showers expected by Tuesday night and Wednesday. The
pattern will then remain progressive through the forecast period
with intervals of unsettled weather conditions.

Discussion As of 03:15 pm pdt Monday... Clear and unseasonably
mild temperatures prevail inland, but stratus has now returned to
just about all of our coast. Although far from a classic case,
there were embedded hints of a southerly stratus surge, remarkable
for this early in the season. And, as in the more prototypical
late spring and summer stratus surge events, its arrival heralds
the end of a period of offshore flow and warm weather even near
the beaches, and the return of the marine layer and cooler onshore
flow. Temperatures this afternoon are generally running 3 to 5
degs warmer than on Sunday, aside from coastal locations,
especially those more exposed to the southwesterly flow. The asos
at watsonville airport, for example, reported a temperature of 75
deg at 2 pm yesterday while just 65 deg 2 pm today.

Forecast models remain in good agreement that a negatively tilted
upper level trough and associated showers will move in to the
district from the southwest Tuesday night and Wednesday. Timing of
the precip onset varies somewhat between the models, but a
consensus view has it spreading northward through the central sf
bay area Wednesday morning. Although not a particularly cold
system, the center of the upper low will pass inland in the
vicinity of our CWA with 500 mb temps down to around -25 deg c. In
conjunction with some Sun breaks and mid-march diurnal heating,
can't rule out the possibility of thunderstorm development
Wednesday afternoon. Chances presently appear largest in the far
southeastern portion of our district, and so have introduced in
the grids and forecast there. This might however need to be
expanded as the time frame approaches.

Shower chances look to diminish Wednesday night and Thursday, with
dry conditions returning districtwide Thursday night. But then the
next weather system is projected to rapidly approach, this time
from the northwest, with rain spreading southward through most
of our area Friday afternoon and evening.

Latest GFS and ECMWF ensemble output continue unsettled weather
conditions through the remainder of the forecast period, and
actually potentially through much of the rest of the month, with
interspersed periods of wet and dry conditions and temperatures
near or a bit below seasonal norms.

Aviation As of 6:07 pm pdt Monday... It'sVFR except along the
immediate coastline there are patches of ifr-lifr in stratus fog.

A surface ridge is located along the coastline steepening the smx-
sfo pressure gradient to 2.5 mb; patchy stratus and fog are
embedded in the southerly winds along the coast while it's clear
inland except for scattered late day convective clouds well
inland. The marine layer varies in depth from near sea level to
approx 1,000 feet.

Eddy circulations along the coast complicating the forecast
picture in the nearest term for stratus fog coverage, but overall
thinking is to go near persistence as long as the southerly
component holds for the evening, pressure gradients and responding
wind fields should relax tonight with late winter nocturnal hours
cooling smoothing out current diurnal land-ocean temperature
contrasts. Marine temperature inversions weakening somewhat
overnight due to cool air advection at 925 mb level, it's much
drier AOA 925 mb tonight into Tuesday thus any morning patchy ifr-
lifr should rapidly dissipate, otherwiseVFR.

Vicinity of ksfo...VFR. Nw-w wind near 15 knots until mid evening,
lighter wind tonight becoming e-se overnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Some characteristics of a southerly surge
arrived mainly earlier on today, but mostly atypical in stratus and
fog behavior at present time. Surface winds are complex, kmry
previously had a SW wind, but has recently shifted to NE while
ksns has NW wind; eddy circulation spin up spin down with exposure
to drier air 1-2 thousand feet agl eroding stratus and fog. 00z
tafVFR at kmry tempo ifr ceiling 13z-17z Tuesday,VFR ksns tempo
ifr 03z-06z this evening. Once Sun sets, nocturnal cooling sets in
will have better look at stratus fog coverage and make any needed
adjustments to tafs by 06z cycle.

Marine As of 2:17 pm pdt Monday... Winds will become more
southerly into this evening ahead of an approaching low pressure
system moving in from the west. Southerly winds will increase
along with rain chances on Tuesday as a cold front moves through
the region. Winds will turn back out of the west to northwest on
Wednesday. A long period westerly swell will arrive tomorrow,
increasing shoaling on bars and harbor entrances is anticipated.

Mtr watches warnings advisories
Tngt None.

Public forecast: blier
aviation: canepa
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 12 mi37 min ENE 5.1 G 5.1 71°F 1012.4 hPa (-1.0)
PCOC1 - 9415144 - Port Chicago, CA 15 mi37 min NNW 2.9 G 2.9 70°F 56°F1012.7 hPa (-0.9)
UPBC1 16 mi37 min NE 2.9 G 4.1
MZXC1 - 9415102 - Martinez-Amorco CA 16 mi37 min NNE 1.9 G 2.9 70°F 56°F1012.7 hPa (-0.9)46°F
LNDC1 20 mi37 min NNW 8 G 9.9 60°F 1013.1 hPa (-0.4)
AAMC1 - 9414750 - Alameda, CA 22 mi37 min NW 2.9 G 5.1 1013.5 hPa (-0.4)
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi37 min WNW 6 G 7 56°F 1013.2 hPa (-0.3)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 23 mi37 min W 2.9 G 4.1
OBXC1 23 mi37 min 57°F 53°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 23 mi37 min WSW 7 G 8.9 64°F 1012.5 hPa (-0.6)
SFXC1 - San Francisco Bay Reserve, CA 24 mi112 min ESE 6 73°F 1013 hPa49°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 24 mi37 min S 6 G 8 58°F 1013.5 hPa (-0.3)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 26 mi37 min W 6 G 8.9 58°F 1012.3 hPa (-0.5)
PXSC1 26 mi37 min 60°F 52°F
RCMC1 - 9414863 - Richmond, CA 27 mi37 min SSE 2.9 G 5.1 1012.9 hPa (-0.3)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 29 mi98 min E 2.9 61°F 1013 hPa (-1.0)
FTPC1 - 9414290 - San Francisco, CA 30 mi37 min SSW 2.9 G 12 1013.8 hPa (-0.8)
RTYC1 - 9414523 - Redwood City, CA 30 mi37 min NNW 12 G 14 60°F 62°F1013.3 hPa (-0.3)

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA11 mi44 minN 610.00 miFair73°F48°F43%1011.2 hPa
Livermore, Livermore Municipal Airport, CA13 mi44 minNE 410.00 miFair73°F50°F44%1012.2 hPa
Hayward, Hayward Air Terminal, CA18 mi43 minNNW 910.00 miA Few Clouds74°F48°F41%1013.4 hPa
Oakland, Metro Oakland International Airport, CA20 mi44 minNNW 710.00 miPartly Cloudy66°F48°F52%1013.1 hPa

Wind History from CCR (wind in knots)
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Last 24hrE3NE3CalmSE4CalmCalmCalmS3CalmSE3CalmCalmSE3CalmS3--NE6N6N7NE9NE64N8N6
1 day agoCalmNW8W4E4CalmCalmCalmNE3CalmS3CalmCalmCalmSE3CalmN54N8N955N7NE5NE6
2 days agoNW4NW6NW3CalmSE3S4CalmCalmCalmSE5SE3S3S3SE3S3N3N4N4N5N6CalmNW5N3NW3

Tide / Current Tables for Mallard Island Ferry Wharf, Suisun Bay, California
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Mallard Island Ferry Wharf
Click for Map
Mon -- 02:11 AM PDT     3.62 feet High Tide
Mon -- 05:57 AM PDT     Moonset
Mon -- 07:14 AM PDT     Sunrise
Mon -- 07:41 AM PDT     1.22 feet Low Tide
Mon -- 01:20 PM PDT     4.36 feet High Tide
Mon -- 04:44 PM PDT     Moonrise
Mon -- 07:17 PM PDT     Sunset
Mon -- 08:44 PM PDT     -0.26 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.63.33.63.52.92.31.71.31.21.62.43.344.34.33.82.921.10.4-0.1-0.20.21

Tide / Current Tables for Antioch Pt .3 mi E, San Joaquin River, California Current
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Antioch Pt .3 mi E
Click for Map
Mon -- 02:13 AM PDT     1.50 knots Max Flood
Mon -- 04:51 AM PDT     -0.00 knots Slack
Mon -- 05:57 AM PDT     Moonset
Mon -- 07:14 AM PDT     Sunrise
Mon -- 07:30 AM PDT     -1.00 knots Max Ebb
Mon -- 10:17 AM PDT     0.00 knots Slack
Mon -- 01:16 PM PDT     1.62 knots Max Flood
Mon -- 03:51 PM PDT     -0.00 knots Slack
Mon -- 04:44 PM PDT     Moonrise
Mon -- 07:17 PM PDT     Sunset
Mon -- 07:22 PM PDT     -1.87 knots Max Ebb
Mon -- 11:29 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.91.31.51.40.7-0.1-0.6-1-1-0.7-0.20.61.31.61.50.9-0.1-1-1.6-1.8-1.8-1.6-1.1-0.4

Weather Map and Satellite Images
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GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
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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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.