Sunday, June24, 2018 L-36.com


Marine Weather and Tides
Pleasanton, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:45AMSunset 8:34PM Sunday June 24, 2018 9:34 AM PDT (16:34 UTC) Moonrise 4:31PMMoonset 2:34AM Illumination 86% Phase: Waxing Gibbous; Moon at 11 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 819 Am Pdt Sun Jun 24 2018
.small craft advisory in effect from 11 am pdt this morning through this evening...
Today..N winds 5 to 10 kt...becoming W 15 to 25 kt with gusts up to 30 kt this afternoon.
Tonight..NW winds 5 to 15 kt with gusts up to 25 kt.
Mon..W winds 10 to 20 kt with gusts up to 25 kt. Patchy fog.
Mon night..W winds 10 to 20 kt with gusts up to 25 kt. Patchy fog.
Tue..W winds 10 to 20 kt with gusts up to 25 kt. Patchy fog.
Tue night..W winds 10 to 20 kt with gusts up to 25 kt. Patchy fog.
Wed..W winds 5 to 10 kt. Patchy fog.
Thu..W winds 5 to 15 kt. Patchy fog.
PZZ500 819 Am Pdt Sun Jun 24 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to moderate winds across the coastal waters today as we feel the effects of a southerly surge. Gusty northerly winds can be expected today across the northern waters and locally along parts of the inner coastal waters and in the san francisco bays. Winds will increase tomorrow as an upper trough moves through to the north. Gusty winds will generate steep wind waves creating hazardous conditions, especially for smaller vessels.

7 Day Forecast for Marine Location Near Pleasanton, CA
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location: 37.66, -121.89     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 241524
afdmtr
area forecast discussion
national weather service san francisco bay area
824 am pdt Sun jun 24 2018

Synopsis A cooling trend will continue to take hold of the bay
area today into Monday. The red flag warning remains in effect for
the north and east bay hills today. The pattern will return to a
more seasonable or cooler set up for the work week.

Discussion As of 08:24 am pdt Sunday... The southerly surge
that raced up the coast yesterday brought widespread clouds along
the coast and locally inland, especially down the salinas valley.

Fort ord profiler shows the marine layer of just a few hundred
yesterday to near 2,000 feet this morning. There have also been a
few reports of patchy fog with drizzle this morning. Latest
satellite trends on visible imagery does show some thinning on the
edges of the marine layer, but doe expect clouds to lingering
along the coast for much of the day. Given the southerly flow it's
totally possible that monterey clears out and santa cruz
struggles to see the Sun today.

The bigger story today, as noted on the previous discussion, will
be the widespread cool down. Still looking for a 10 to 20 degree
cool down across the interior. Despite the cool down temperatures
across the interior will be still be a few degrees above normal
with highs in the 80s and 90s. Far interior of napa, monterey and
san benito counties may see a few pockets of 100 deg.

No update is planned at this time.

Prev discussion As of 04:00 am pdt Sunday... The story for today,
Sunday, is a noticeable cool down across the bay area and
monterey bay regions. This is a result of the upper ridge axis
shifting to the east with an upper trough pushing in from the
west. A surge of winds from the south with low clouds and fog
began moving in yesterday evening as the ridge shifted while the
upper low is helping to pull the surge northward. As the upper low
moves closer to the coast the low clouds will deepen causing
deeper inland penetration under the influence of a strong onshore
push. In areas where the surge has already reached, temperatures
are 10 to 20 degrees lower than 24 hours ago with winds from the
south at 10 to 20 mph. This surging marine layer is deepening as
well, causing cooling temps inland by about 5 degrees. The lone
hold outs of warmer temps are the highest sites in the hills which
are still holding on to the 70s and 80s.

The forecast for the rest of the day is onshore flow and cooling.

Some areas will see a 10 to 20 degree cool down from the high
temps of Saturday. Inland regions will remain hot today before the
onshore flow really takes hold. Temps into the 90s will persist
and near 100 in portions of north and east bay, as well as parts
of san benito county. Offshore winds in the mountains and hills
will turn onshore through the day. In short, look for much cooler
temps than yesterday under the influence of onshore flow.

Several upper troughs will clip the region from the north through
the remainder of the week, keeping a cap on temps. At this time
it looks like the area will be seasonable or below normal through
the week. These troughs will maintain a deep marine layer each
day.

Aviation As of 4:43 am pdt Sunday... Southerly stratus surge
has advanced up past the mendocino sonoma county border, and is
already pushing through the san francisco bay into the delta as
well. Stratus has also filled into the salinas valley and into
san benito county. The marine layer depth is 2000 feet deep per
the fort ord profiler, and the sfo-sac surface pressure gradient
is up to 3.3 mb. Ceilings at mry and sns will be slow to clear
today, and look for bay area terminals to sock in overnight
tonight. Gusty westerly northwesterly winds are expected through
this evening.

Vicinity of ksfo... Should remainVFR today but confidence is low.

Northwest winds will pick up this afternoon with gusts to 22
knots. Ifr CIGS developing by 08z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr CIGS through the morning. Look for
MVFR CIGS in the afternoon with gusty northwest winds to 20 knots.

Ifr CIGS again by 06z.

Fire weather As of 4:00 am pdt Sunday... Red flag warning
remains intact for the time being. Onshore flow, cooling temps,
and rising humidity will continue to develop through the day. That
said, overnight recoveries have been modest at best with rhs at
elevation in the 20-30% range. Valley to midslope recoveries have
been much better overnight, reaching into the 60-70% range. Winds
at elevation remain breezy this morning with diablo the big winner
at around 30 mph from the nnw. The red flag warning will need to
be reevaluated later this morning to determine how deep the marine
layer is developing. This may truncate the warning and allow it to
be cancelled early.

With the ongoing fire activity around the state and conditions
slowly changing will leave the red flag warning out for now.

Marine As of 03:11 am pdt Sunday... High pressure over the
eastern pacific and a thermal trough over inland california will
keep gusty northerly winds across the northern coastal waters
through today. Gusty winds will generate steep wind waves
creating hazardous sea conditions, particularly for small
vessels. Winds will subside tonight as a southerly surge pushes
northward shifting the winds along the inner coastal waters out
of the south. Winds will pick up again on Monday as an upper
trough moves through to the north.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Sf bay
public forecast: mm
aviation: sims
marine: sims
fire weather: rww
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 20 mi47 min 72°F
AAMC1 - 9414750 - Alameda, CA 23 mi53 min Calm G 4.1 63°F 68°F1011.1 hPa
LNDC1 23 mi47 min NW 2.9 G 5.1 62°F 1011 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi53 min NW 6 G 7
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 26 mi47 min NW 19 G 24 66°F 1008 hPa
OBXC1 26 mi53 min 60°F 58°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi47 min NW 9.9 G 12 59°F 1011.1 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 28 mi53 min SE 2.9 G 4.1 63°F 1009.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 28 mi53 min W 15 G 19 63°F 69°F1009.6 hPa
PXSC1 29 mi53 min 64°F 58°F
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi47 min 69°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 30 mi47 min WSW 8.9 G 15 60°F 1011.2 hPa
FTPC1 - 9414290 - San Francisco, CA 32 mi53 min W 9.9 G 13 59°F 59°F1011.3 hPa
RCMC1 - 9414863 - Richmond, CA 33 mi53 min SW 8 G 13 60°F 63°F1010.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi47 min WSW 14 G 19 61°F 1010.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 38 mi110 min W 13 63°F 1008 hPa57°F
46237 - San Francisco Bar, CA (142) 40 mi65 min 55°F4 ft

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA5 mi42 minVar 310.00 miFair69°F53°F57%1009.5 hPa
Hayward, Hayward Air Terminal, CA12 mi41 minNW 310.00 miFair66°F55°F70%1011.7 hPa
Palo Alto Airport, CA17 mi1.8 hrsVar 510.00 miPartly Cloudy64°F59°F83%1010.5 hPa
Mountain View, Moffett Field, CA18 mi99 minN 010.00 miPartly Cloudy64°F55°F75%1010.7 hPa
Oakland, Metro Oakland International Airport, CA18 mi42 minW 410.00 miA Few Clouds64°F57°F78%1010.9 hPa
San Jose, San Jose International Airport, CA20 mi42 minE 510.00 miPartly Cloudy66°F55°F68%1010.7 hPa
San Carlos Airport, CA21 mi48 minWNW 510.00 miPartly Cloudy66°F55°F68%1010.8 hPa
San Jose / Reid / Hillv, CA22 mi1.8 hrsS 710.00 miClear64°F53°F68%1009.8 hPa
Concord, Buchanan Field, CA24 mi42 minWNW 810.00 miFair70°F55°F59%1008.5 hPa

Wind History from LVK (wind in knots)
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Last 24hrE8NE10E11E8SW63W8W11W11W11W7W7W7S3W3NW5NW7W6W5SW3S5S6SW83
1 day agoCalm3S3SW4S6SW8W12W12W12W13W12W3CalmCalmCalmCalmCalmCalmCalmCalm3SW345
2 days ago5NW6W7NW7NW6W8W10W10W13W11NW12CalmNW4W5W4W5CalmNW3CalmCalmCalmCalmCalmSW3

Tide / Current Tables for Mowry Slough, San Francisco Bay, California
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Mowry Slough
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Sun -- 03:35 AM PDT     Moonset
Sun -- 05:48 AM PDT     Sunrise
Sun -- 06:10 AM PDT     -0.00 feet Low Tide
Sun -- 12:00 PM PDT     6.81 feet High Tide
Sun -- 05:30 PM PDT     Moonrise
Sun -- 05:34 PM PDT     2.12 feet Low Tide
Sun -- 08:33 PM PDT     Sunset
Sun -- 11:09 PM PDT     8.77 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
86.64.831.40.400.31.53.24.96.36.86.45.44.132.22.23.14.66.488.8

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Sun -- 02:42 AM PDT     -1.44 knots Max Ebb
Sun -- 03:35 AM PDT     Moonset
Sun -- 05:48 AM PDT     Sunrise
Sun -- 05:56 AM PDT     0.00 knots Slack
Sun -- 09:27 AM PDT     1.62 knots Max Flood
Sun -- 12:54 PM PDT     -0.00 knots Slack
Sun -- 03:18 PM PDT     -0.65 knots Max Ebb
Sun -- 05:31 PM PDT     Moonrise
Sun -- 05:38 PM PDT     0.00 knots Slack
Sun -- 08:33 PM PDT     Sunset
Sun -- 08:57 PM PDT     1.41 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-1.1-1.4-1.4-1.2-0.70.10.81.31.61.61.20.6-0.1-0.5-0.6-0.6-0.30.20.91.31.41.30.9

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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Wind Forecast for San Francisco/Monterey Bay Area, CA (12,3,4,5)
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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.