Thursday, August22, 2019 L-36.com


Marine Weather and Tides
Diablo, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:28AMSunset 7:53PM Thursday August 22, 2019 8:10 PM PDT (03:10 UTC) Moonrise 10:52PMMoonset 12:03PM Illumination 50% Phase: Third Quarter Moon; Moon at 22 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- 356 Pm Pdt Thu Aug 22 2019
.small craft advisory in effect from Friday morning through Friday evening...
Rest of today..SW winds 10 to 20 kt with gusts up to 25 kt.
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri..SW winds 10 to 20 kt with gusts up to 30 kt.
Fri night..SW winds 10 to 15 kt with gusts up to 25 kt.
Sat..SW winds 10 to 15 kt.
Sat night..SW winds 10 to 15 kt.
Sun..SW winds 15 to 25 kt with gusts up to 30 kt.
Mon..SW winds 15 to 20 kt.
PZZ500 356 Pm Pdt Thu Aug 22 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds strengthened across the waters today, particularly along the coastal jets and outer waters north of point reyes. These winds are driving a steep northwest swell at 8 to 10 seconds now into Friday that may be hazardous to small craft vessels. Winds will weaken and turn southwesterly along the coast later Friday. This wind shift will also ease wind generated seas. A pair of small, longer period swells will also move through the coastal waters into next week.


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 230131
afdmtr
area forecast discussion
national weather service san francisco bay area
622 pm pdt Thu aug 22 2019

Synopsis The warm temperatures today cool slightly on Friday
across the bay area. However, higher dew point temperatures tomorrow
will keep inland areas feeling warmer. Temperatures will increase
this weekend as high pressure builds over california lasting through
the early work week. By midweek, moisture increases as the remnants
of ivo traverses northward in the pacific ocean just off the
california coast allowing muggy conditions to return.

Discussion As of 02:03 pm pdt Thursday... There are higher dewpoint
temperatures today around the bay area, ranging from 61 in salinas
to 69 in san jose giving a muggy feel to the day. The marine layer
has been pseudo-constant around 1500 feet the last few hours and
will remain fairly shallow overnight, though patchy fog may be
possible in the early morning hours along the coast. Onshore flow
strengthens slightly tomorrow, providing slightly cooler
temperatures on Friday. Lingering higher dew point temperatures
inland will keep temperatures feeling warmer for interior locations.

High pressure builds over california this weekend which will drive a
warming trend for temperatures. Temperatures will MAX out on Sunday
in the mid to upper 90s, with isolated locations in southern san
benito and monterey counties reaching the low 100s. However, those
values are based on current models having the ridge axis of high
pressure north of the bay area. If the ridge retrogrades slightly,
temperatures around our area could increase even higher, thus will
be monitored as the next round of models are produced.

The warming trend looks to continue through the early part of the
work week. By Wednesday, the remnants of the tropical system ivo
will have moved northward in the pacific just west of the bay area.

Ivo will bring an increase in moisture giving a better chance for
clouds cover across the area and an overall muggy feeling. No
precipitation or thunderstorms are currently forecast, though it
will be something that will be closely monitored as the time
interval draws closer.

Aviation As of 6:22 pm pdt Thursday... An influx of drier air,
an air flow with origins having more mid-latitude influence, has
spread in on northwest coastal winds. Ifr ceilings due to coastal
stratus and fog are presently limited to the san mateo coast and
the southern half of the montery bay area and the northern salinas
valley south along the coast to point sur. Elsewhere it'sVFR, and
land based surface weather observations still show elevated dew point
temperatures, a measure of water vapor, in the upper 50s to mid 60s.

At present the latest WRF model boundary layer relative humidity is
over-forecasting areal coverage of coastal stratus and fog. The
marine layer remains compressed to 700 to 800 feet with inversion
temperatures from 24c to 26c still plenty warm to keep the inversions
intact through the period despite some near surface based cool air
advection tonight and Friday.

For this evening's volume, it's a moderate to high confidenceVFR
forecast for the bay area terminals. Ifr will be confined to
aforementioned locations for the evening, and still expecting ifr to
spread inland tonight, however it'll be delayed somewhat until
nighttime cooling and still favorable thermodynamics combine to
produce increasing areal coverage of coastal stratus and fog. On
Friday there should be sufficient diurnal mixing to lift ceilings to
vfr at most, mainly inland, terminals, however in terms of areal
coverage of stratus and fog it's a very low confidence forecast
Friday into Saturday morning; a temporarily ramped up (4 mb) smx-sfo
pressure gradient and wind juxtaposed to a diminishing (3 mb or
less) acv-sfo pressure gradient and wind could cause any combination
of coverage.

Vicinity of ksfo...VFR, west wind 20 knots with occasional gusts
to 30 knots until 04z this evening. The combination of a compressed
marine layer and abscence of stratus and fog upstream to the
northwest supports a moderate to high confidenceVFR forecast for
the evening. After this however it's a lowering confidence ifr
ceiling forecast for tonight. The terminal and approach may just
hold on toVFR for the overnight and Friday if the aforementioned
smx-sfo pressure gradient develops (usually the NAM is slow with
this forecast) under a compressed marine layer. Will monitor as
we approach the 06z TAF issuance, a reduction in ifr forecast duration
for Friday morning is possible.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... A solid coverage of stratus and fog exists
over the southern monterey bay area and northern salinas valley.

Lifr-ifr conditions forecast tonight with northwest winds ushering
in some surface based cooling, a brief uptick in cooling and marine
layer depth is most recently seen on the fort ord profiler, cooling
then extends up to the 925 mb level Friday. Lifr-ifr Friday morning
lifts toVFR by late morning.

Marine As of 4:43 pm pdt Thursday... Northwest winds
strengthened across the waters today, particularly along the
coastal jets and outer waters north of point reyes. These winds
are driving a steep northwest swell at 8 to 10 seconds now into
Friday that may be hazardous to small craft vessels. Winds will
weaken and turn southwesterly along the coast later Friday. This
wind shift will also ease wind generated seas. A pair of small,
longer period swells will also move through the coastal waters
into next week.

Mtr watches warnings advisories
Tngt Sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 am
sca... Pt arena to pt reyes 0-10 nm
public forecast: dk
aviation: canepa
marine: drp
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 12 mi59 min NW 9.9 G 13 85°F 1004.6 hPa
PCOC1 - 9415144 - Port Chicago, CA 15 mi59 min WSW 8.9 G 11 83°F 72°F1005.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 16 mi59 min WSW 13 G 15 83°F 71°F1005.1 hPa
UPBC1 16 mi59 min W 14 G 15
LNDC1 20 mi59 min WSW 8 G 9.9 67°F 1006.7 hPa
AAMC1 - 9414750 - Alameda, CA 22 mi59 min WSW 8.9 G 11 65°F 73°F1007.3 hPa
OBXC1 23 mi53 min 66°F 61°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi59 min W 6 G 8 66°F 1006.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 23 mi59 min WSW 9.9 G 11
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 23 mi59 min SW 9.9 G 11 76°F 1005.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 24 mi59 min S 18 G 21 64°F 1006.6 hPa
SFXC1 - San Francisco Bay Reserve, CA 24 mi86 min W 8.9 87°F 1005 hPa59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 26 mi59 min WSW 8 G 13 64°F 1005.7 hPa
PXSC1 26 mi53 min 66°F 59°F
RCMC1 - 9414863 - Richmond, CA 27 mi53 min 66°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 29 mi48 min SE 4.1 67°F 1006 hPa
FTPC1 - 9414290 - San Francisco, CA 30 mi59 min WSW 16 G 24 62°F 62°F1006.7 hPa
RTYC1 - 9414523 - Redwood City, CA 30 mi59 min NW 13 G 16 72°F 75°F1006.9 hPa
46237 - San Francisco Bar, CA (142) 39 mi41 min 60°F6 ft

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA11 mi2.3 hrsW 710.00 miFair94°F57°F29%1003.6 hPa
Livermore, Livermore Municipal Airport, CA13 mi2.3 hrsWNW 1210.00 miFair88°F59°F38%1005.1 hPa
Hayward, Hayward Air Terminal, CA18 mi2.3 hrsW 1010.00 miFair73°F61°F66%1007.6 hPa
Oakland, Metro Oakland International Airport, CA20 mi2.3 hrsWNW 1510.00 miA Few Clouds73°F59°F62%1006.9 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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Last 24hrSW6W6S8S7S11S10S9S11S10S11--S7S5SW44NE4NW7--NW8W9W12W7SW8W5
1 day agoSW9S11S9S10S10S11S12S10S13S10S10S7S7SW33NW7W11NW10NW10W9SW10SW12SW11SW5
2 days agoS8S9S9S10S10SW9SW10S10S13SW8SW7SW9S9S7S9W8W11
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Tide / Current Tables for Pittsburg, New York Slough, Suisun Bay, California
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Pittsburg
Click for Map
Thu -- 02:46 AM PDT     1.02 feet Low Tide
Thu -- 06:28 AM PDT     Sunrise
Thu -- 08:33 AM PDT     2.78 feet High Tide
Thu -- 01:03 PM PDT     Moonset
Thu -- 02:03 PM PDT     1.07 feet Low Tide
Thu -- 07:51 PM PDT     Sunset
Thu -- 08:06 PM PDT     3.97 feet High Tide
Thu -- 11:51 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.31.111.21.62.12.52.72.82.62.21.71.21.11.21.62.33.13.743.93.53

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
Thu -- 01:16 AM PDT     -1.36 knots Max Ebb
Thu -- 05:42 AM PDT     0.00 knots Slack
Thu -- 06:28 AM PDT     Sunrise
Thu -- 08:21 AM PDT     0.91 knots Max Flood
Thu -- 11:08 AM PDT     -0.00 knots Slack
Thu -- 01:03 PM PDT     Moonset
Thu -- 01:49 PM PDT     -0.95 knots Max Ebb
Thu -- 05:06 PM PDT     0.00 knots Slack
Thu -- 07:51 PM PDT     Sunset
Thu -- 08:12 PM PDT     1.60 knots Max Flood
Thu -- 10:59 PM PDT     -0.00 knots Slack
Thu -- 11:51 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.1-1.3-1.3-1.1-0.8-0.40.20.70.90.80.60.1-0.4-0.8-0.9-0.8-0.5-0.10.61.31.61.40.8-0

Weather Map and Satellite Images
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wmap_P
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 (23,6,7,8)
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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.