Monday, December10, 2018 L-36.com


Marine Weather and Tides
Danville, 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 7:11AMSunset 4:50PM Monday December 10, 2018 12:39 AM PST (08:39 UTC) Moonrise 9:56AMMoonset 8:00PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 818 Pm Pst Sun Dec 9 2018
Tonight..E winds 5 to 15 kt. Chance of rain after midnight.
Mon..NE winds 5 to 15 kt. Chance of showers in the morning, then slight chance of showers in the afternoon.
Mon night..NW winds 10 kt.
Tue..NW winds 10 kt.
Tue night..W winds 5 to 15 kt.
Wed..N winds 10 kt.
Thu..NE winds 5 to 10 kt.
Fri..S winds 10 kt...becoming w. Chance of rain.
PZZ500 818 Pm Pst Sun Dec 9 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A cold front will drift southeastward over the coastal waters tonight and Monday. Northwest winds will increase in the wake of the frontal passage then diminish on Wednesday. Moderate northwest swell will continue before a larger northwest swell arrives towards the end of the coming work week.


7 Day Forecast for Marine Location Near Danville, CA
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location: 37.79, -122     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 100554
afdmtr
area forecast discussion
national weather service san francisco bay area
954 pm pst Sun dec 9 2018

Synopsis A weak front will likely bring light rain to portions
of the area tonight and Monday morning, primarily to the north
bay but also locally as far south and east as the east bay and
santa cruz county. Another weak system may bring light rain to
the far northern portion of our region around midweek. Otherwise,
dry and mild weather is forecast through Thursday night. There is
a potential for more substantial and widespread rainfall late in
the week and into next weekend.

Discussion As of 08:55 pm pst Sunday... A weak cold front
continues to approach northern california late this evening with
light rain reported at the sea ranch along coastal sonoma county
and points northward. Light rain will be possible over the far
northern portions of the north bay through the remainder of the
evening before spreading southward and inland overnight. The
latest forecast models are in good agreement in showing the
frontal system and associated precipitation dissipating as it
approaches the san francisco bay area around sunrise. Thus, only
expecting very light rainfall if any to occur south of the golden
gate bridge during the Monday morning commute. It is also looking
more likely that portions of the south bay and entire central
coast may see no measurable rainfall at all from this system. Have
adjusted the forecast accordingly. For additional details, please
see the previous forecast discussion below.

Prev discussion As of 1:45 pm pst Sunday... Visibilities
improved in the east bay valleys by late morning, but light fog
still lingers across portions of the north and east bay early this
afternoon. Fog will likely persist in these areas into tonight.

However, with increasing clouds and precipitation developing
overnight, it's unlikely dense fog will be a problem.

Widespread high clouds in advance of a weak pacific frontal system
continue to stream across our area. These clouds have resulted in
cooler temperatures today compared to yesterday. Satellite shows
that the approaching front is currently about 300 miles west of
san francisco. The models are in generally good agreement in
spreading light rain across the north bay overnight, with rain
then possibly reaching san francisco by sunrise Monday. The front
is then forecast to dissipate over the central portion of the sf
bay area on Monday morning. Therefore, rain is expected to be
spotty for areas south of the golden gate, and rain is very
unlikely south of santa cruz and san jose. The primary impact of
this weak weather system will be potential wet roadways during the
morning commute tomorrow, particularly across the north bay, san
francisco peninsula, and east bay. Monday afternoon is expected to
be dry except for a few lingering isolated showers. Rainfall
amounts with this system are forecast to be a quarter inch or
less, except potentially more for isolated spots in the north bay
mountains. This system will generate only light winds.

The models appear to be trending drier with the midweek system,
forecast to sweep quickly across far northern california on
Tuesday night. The tail end of a weak front may clip the far
northern fringes of our forecast area with some light rain on
Tuesday night. Otherwise, dry conditions will likely prevail
across our forecast area from Monday afternoon through Thursday.

Temperatures will be near seasonal averages.

Longer range models indicate better precipitation potential late
in the week and into next weekend when two systems are forecast to
bring more substantial and widespread rain to our region.

Aviation As of 9:54 pm pst Sunday... A cold front over the
northern coastal waters and northern sonoma county is crawling
along, slower than yesterday's models forecasted, at about 10 mph.

Patchy tule fog mostly persists inland, otherwise a mix of mainly
mid to high level clouds are advancing eastward over the area.

The 06z tafs advertise a chance of wet weather with the incoming
slowly moving cold front; some loss of confidence in the model
forecasts based on recent weather changes just in 24 hours. The
sub-tropical jet stream departs to the e-se tonight and early
Monday no longer waiting for the cold front. Rather, all models
agree a moderate to strong 500 mb vorticity trough will amplify as
it passes over the CWA Monday late morning and afternoon; showery
weather Monday with the cold front and perhaps a non-zero chance
of isolated deeper convection along the dry to moist mid-upper
level moisture gradient embedded in the amplifying 500 mb trough
if the near surface moisture can lift through lower level stability.

Satellite and radar data will be extra helpful to the forecast
process in the nearest term.

Vicinity of ksfo...VFR, light wind. Increasing clouds lowering
ceiling to MVFR and vcsh early Monday morning, tempo showers
14z-18z. Non-zero chance isolated convection could briefly ramp
up Monday while a 500 mb trough passes over the bay area.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR, light wind. Increasing clouds either
late tonight and or Monday as the pre-frontal environment becomes
more moist on southerly flow. Isolated showers Monday.

Marine As of 8:55 pm pst Sunday... A cold front will drift
southeastward over the coastal waters tonight and Monday.

Northwest winds will increase in the wake of the frontal passage
then diminish on Wednesday. Moderate northwest swell will continue
before a larger northwest swell arrives towards the end of the
coming work week.

Mtr watches warnings advisories
Tngt None.

Public forecast: rgass dykema
aviation marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 15 mi40 min N 1.9 G 1.9 49°F 1024.4 hPa (-0.4)
AAMC1 - 9414750 - Alameda, CA 16 mi40 min N 1.9 G 2.9 49°F 55°F1024.8 hPa (-0.3)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 18 mi40 min NE 5.1 G 5.1 48°F 1025.1 hPa (-0.4)
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi40 min NE 1.9 G 1.9 49°F 1024.6 hPa (+0.0)
PCOC1 - 9415144 - Port Chicago, CA 18 mi40 min E 4.1 G 6 47°F 54°F1025.1 hPa (-0.5)
OBXC1 18 mi40 min 51°F 50°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi40 min ENE 1.9 G 1.9
MZXC1 - 9415102 - Martinez-Amorco CA 18 mi40 min E 1.9 G 4.1 48°F 53°F1025 hPa (-0.3)48°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi40 min NNW 7 G 9.9 51°F 1023.6 hPa (+0.0)
PXSC1 21 mi40 min 52°F 51°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi40 min N 2.9 G 6 49°F 1024.8 hPa (-0.3)
RTYC1 - 9414523 - Redwood City, CA 23 mi40 min W 1.9 G 2.9 47°F 56°F1025 hPa (-0.3)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 23 mi40 min E 5.1 G 6 49°F 1024.6 hPa (-0.3)
RCMC1 - 9414863 - Richmond, CA 24 mi40 min NNW 4.1 G 6 51°F 55°F1024.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 25 mi41 min NNW 9.9 50°F 1025 hPa
FTPC1 - 9414290 - San Francisco, CA 25 mi40 min N 11 G 15 50°F 56°F1024.8 hPa (+0.0)
SFXC1 - San Francisco Bay Reserve, CA 28 mi55 min ENE 2.9 41°F 1025 hPa40°F
46237 - San Francisco Bar, CA (142) 34 mi40 min 56°F7 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi30 min E 12 G 16 54°F 57°F1024.4 hPa

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA11 mi47 minN 00.15 miFog42°F42°F100%1024.6 hPa
Hayward, Hayward Air Terminal, CA11 mi46 minNE 76.00 miFair with Haze48°F43°F83%1025.6 hPa
Concord, Buchanan Field, CA13 mi47 minE 33.00 miFog/Mist44°F39°F85%1023.8 hPa
Oakland, Metro Oakland International Airport, CA13 mi47 minENE 47.00 miA Few Clouds45°F43°F93%1024.8 hPa
San Francisco, San Francisco International Airport, CA22 mi1.7 hrsE 36.00 miFog/Mist50°F46°F86%1024.3 hPa
Palo Alto Airport, CA22 mi3.9 hrsVar 410.00 miPartly Cloudy48°F44°F87%1025.4 hPa
San Carlos Airport, CA22 mi45 minN 04.00 miFog/Mist46°F44°F93%1024.7 hPa

Wind History from LVK (wind in knots)
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Last 24hrCalmCalmCalmCalmNW3NW3CalmCalmW3CalmCalmE7NE8NE53NE7E3E4E5NE3CalmE4E4Calm
1 day agoNE3E3N3CalmCalmCalmCalmCalmCalm3NE11NE13NE12NE11NE11E11E10NE83S3CalmCalmE3E4
2 days agoCalmCalmCalmE4E3E3CalmE3CalmW3W5SW33NE7NE5E8NE7CalmNE3E3E3E3CalmCalm

Tide / Current Tables for San Leandro Marina, San Francisco Bay, California
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San Leandro Marina
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Mon -- 03:13 AM PST     6.08 feet High Tide
Mon -- 07:13 AM PST     Sunrise
Mon -- 08:14 AM PST     3.19 feet Low Tide
Mon -- 09:56 AM PST     Moonrise
Mon -- 01:29 PM PST     7.19 feet High Tide
Mon -- 04:50 PM PST     Sunset
Mon -- 08:01 PM PST     Moonset
Mon -- 08:50 PM PST     -0.36 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.34.65.66.15.95.24.33.63.23.44.15.26.37.17.16.55.43.82.10.7-0.1-0.30.11.1

Tide / Current Tables for Oakland Harbor High Street Bridge, San Francisco Bay, California Current
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Oakland Harbor High Street Bridge
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Mon -- 02:25 AM PST     -0.00 knots Slack
Mon -- 04:12 AM PST     -0.77 knots Max Ebb
Mon -- 07:13 AM PST     Sunrise
Mon -- 07:54 AM PST     0.00 knots Slack
Mon -- 09:56 AM PST     Moonrise
Mon -- 10:18 AM PST     0.99 knots Max Flood
Mon -- 01:09 PM PST     -0.00 knots Slack
Mon -- 04:16 PM PST     -1.70 knots Max Ebb
Mon -- 04:49 PM PST     Sunset
Mon -- 08:01 PM PST     Moonset
Mon -- 08:40 PM PST     0.00 knots Slack
Mon -- 11:29 PM PST     1.61 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.51.10.3-0.4-0.8-0.7-0.5-0.300.610.90.60.1-0.6-1.3-1.7-1.6-1.3-0.9-0.40.31.11.6

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 (3,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, 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.