Tuesday, June19, 2018 L-36.com


Marine Weather and Tides
East Palo Alto, 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 5:46AMSunset 8:34PM Tuesday June 19, 2018 8:47 AM PDT (15:47 UTC) Moonrise 11:25AMMoonset 12:00AM Illumination 37% 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- 821 Am Pdt Tue Jun 19 2018
.small craft advisory in effect from noon pdt today through this evening...
.small craft advisory in effect from Wednesday morning through Wednesday evening...
Today..SW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon.
Tonight..SW winds 15 to 25 kt.
Wed..SW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon.
Wed night..SW winds 15 to 25 kt.
Thu..SW winds 5 to 15 kt.
Fri..W winds 5 to 15 kt.
Sat..W winds 5 to 15 kt.
PZZ500 821 Am Pdt Tue Jun 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northwesterly winds will persist across the coastal waters through mid week before winds increase. Gusty winds are expected this afternoon for the near shore waters as well as the san francisco and Monterey bays. Seas will remain relatively light with a mixed northwest and southerly swell.

7 Day Forecast for Stanford CDP, CA
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location: 37.437, -122.153     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 191512
afdmtr
area forecast discussion
national weather service san francisco bay area
812 am pdt Tue jun 19 2018

Synopsis Temperatures will warm throughout the interior this
afternoon as high pressure begins to build over the southwestern
united states. Little day-to-day change in highs are expected from
Tuesday to Wednesday as the ridge flattens before a more noted
warming trend develops late in the week and into the weekend with
hot temperatures forecast for inland areas.

Discussion As of 08:12 am pdt Tuesday... Early morning visible
satellite imagery reveals a solid marine layer in place this
morning - widespread clouds over the coastal waters and across
much of the inland valleys. Automated airport observations also
indicate some patchy fog impacting portions of the bay area this
morning with vsby less than 5 miles. Do expect a gradual burn off
back to the coast by mid morning. Otherwise, sunny skies prevail
across much of the region today. Building high pressure will
continue the warming trend noticed on Monday.

No update is planned at this time, but see below for more details.

Biggest weather impact the next seven days will be the upcoming
heat and potential heat risk to sensitive populations.

Prev discussion As of 2:52 am pdt Tuesday... Infrared satellite
imagery reveals areas of coastal stratus across parts of the san
francisco bay area and central california coast this early Tuesday
morning. According to the fort ord profiler, the marine layer
depth has compressed to around 1,200 to 1,500 ft deep, whereas
yesterday morning at this time it was around 2,500 ft. A
consequence to a more compressed marine layer is the increased
possibility of localized fog along the coast through sunrise. If
you encounter reduced visibilities on your Tuesday morning
commute, be mindful of your speed, following distance, and ensure
your headlights are on. This compression of the marine layer is
largely a result of a departing upper level low that has been
replaced with a building upper level ridge. This ridge will be the
main focus for the extended forecast as temperatures are forecast
to rise through the rest of the work week and into the weekend.

For the short-term, high temperatures this afternoon are expected
to trend upward across the interior anywhere from ~ 4 to 8
degrees from Monday. Again, this is a result of the building upper
level ridge that is currently off the baja california coast. The
ridge's influence is beginning to show in the oakland upper air
balloon launches: from 12z june 18 to 00z june 19, 500 mb heights
have risen from 579 to 583 decameters, and 850 mb temps have
bumped up from 13.2 to 15.0 deg c. Despite little day-to-day
change from Tuesday to Wednesday, the upward trend in heights and
temps will really ramp by by the end of the week with forecasted
500 mb heights expected to reach 592+ decameters by the weekend
over the bay area with 850 mb temps rising to 22+ deg c. At the
surface, these values will translate to widespread 90s and triple
digits for inland communities. Official high temperature forecasts
over the weekend could perhaps be too low for some locations as
models can (and have) struggled to properly capture warming for
parts of our region. For example, the official forecast high on
Saturday for san jose is 93 degrees, but some of the hottest
members of the ECMWF ensemble prediction system are advertising
upper 90s low 100s in san jose. We'll continue to monitor the
latest deterministic and ensemble guidance over the next few days
and adjust the forecast accordingly. Heat impact levels are
expected to at least reach the moderate (orange) category this
weekend, but again will have to monitor for changes over the next
few days. Temperatures along the immediate pacific coast are
expected to remain fairly comfortable into the weekend with highs
generally in 60s to low 80s. The ridge is expected to weaken
heading into the beginning of next week, and will allow for
temperatures in the interior to begin a cooling trend.

Aviation As of 04:35 am pdt Tuesday... For 12z tafs. The marine
layer currently remains at around 1000 ft with CIGS ranging from
as low as 100 ft at kmry to up to 1100 ft at ksjc. Ifr CIGS are
expected to continue into the morning with clearing between 16z-
18z. There is a chance CIGS could raise a bit after sunrise.VFR
conditions are expected this afternoon and evening before low
clouds return late tonight. Generally light winds through the
period with onshore winds this afternoon 10 to 15 kt.

Low confidence on clearing times.

Vicinity of ksfo... Ifr CIGS through 16z-17z.VFR this afternoon
and evening before ifr CIGS return late tonight. Breezy onshore
winds this afternoon with gusts 20-25kt.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Lifr CIGS through sunrise, potentially
then rising to ifr. Clearing is expected between 17z-18z.VFR
conditions this afternoon before ifr CIGS return tonight.

Generally light winds through the period.

Marine As of 2:44 am pdt Tuesday... Light to moderate northwesterly
winds will persist across the coastal waters through mid week
before winds increase. Gusty winds are expected this afternoon for
the near shore waters as well as the san francisco and monterey
bays. Seas will remain relatively light with a mixed northwest and
southerly swell.

Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm from 12 pm
sca... Mry bay from 2 pm
sca... Pigeon pt to pt pinos 0-10 nm from 2 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 2 pm
sca... Sf bay from 12 pm
public forecast: mm rowe
aviation: as
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 6 mi48 min 70°F
AAMC1 - 9414750 - Alameda, CA 24 mi54 min SW 4.1 G 7 54°F 66°F1017.9 hPa
LNDC1 26 mi48 min SSW 2.9 G 6 54°F 1017.7 hPa (+1.0)
OBXC1 27 mi48 min 54°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 27 mi54 min SSW 4.1 G 6
OKXC1 - 9414776 - Oakland (Berth 34), CA 28 mi48 min SW 4.1 G 6 54°F 1017.8 hPa (+1.0)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 28 mi54 min W 5.1 G 7 53°F 1016.7 hPa
PXSC1 28 mi54 min 55°F 55°F
FTPC1 - 9414290 - San Francisco, CA 30 mi54 min Calm G 6 53°F 56°F1017.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 34 mi48 min S 8.9 G 12 55°F 1017.8 hPa (+1.0)
46237 - San Francisco Bar, CA (142) 35 mi48 min 55°F4 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 35 mi55 min SE 1.9 53°F 1018 hPa (+1.0)
RCMC1 - 9414863 - Richmond, CA 36 mi54 min SSW 1.9 G 5.1 55°F 60°F1017.3 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 39 mi58 min NW 9.7 G 12 53°F 53°F6 ft1018.6 hPa (+0.9)
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi54 min W 8.9 G 11 56°F 66°F1016.9 hPa56°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi38 min NW 9.7 G 14 52°F 53°F1018.6 hPa
PCOC1 - 9415144 - Port Chicago, CA 43 mi54 min WSW 14 G 16 57°F 67°F1016.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi48 min WSW 11 G 14 55°F 1016.9 hPa (+1.3)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 44 mi54 min NW 13 G 16 62°F 1015.3 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 47 mi58 min NW 12 G 16 53°F 56°F6 ft1017.5 hPa (+1.4)
46092 - MBM1 48 mi84 min NNW 3.9 53°F 55°F1017.8 hPa (+0.9)
ELXC1 - Elkhorn Slough Reserve, CA 48 mi63 min ENE 1 53°F 1017 hPa53°F

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA2 mi61 minN 010.00 miOvercast57°F53°F88%1017.6 hPa
Mountain View, Moffett Field, CA3 mi52 minENE 310.00 miOvercast59°F54°F83%1018 hPa
San Carlos Airport, CA10 mi61 minNW 310.00 miOvercast57°F51°F82%1017.6 hPa
San Jose, San Jose International Airport, CA11 mi55 minN 010.00 miOvercast60°F54°F80%1017.4 hPa
Hayward, Hayward Air Terminal, CA15 mi54 minN 010.00 miOvercast57°F52°F83%1018.6 hPa
San Jose / Reid / Hillv, CA17 mi61 minVar 46.00 miFog/Mist59°F53°F82%1016.9 hPa
San Francisco, San Francisco International Airport, CA18 mi52 minW 710.00 miOvercast57°F51°F81%1017.7 hPa
Oakland, Metro Oakland International Airport, CA18 mi55 minWSW 55.00 miFog/Mist55°F53°F93%1017.8 hPa
Half Moon Bay Airport, CA22 mi53 minN 52.50 miFog/Mist54°F51°F94%1018.3 hPa
Livermore, Livermore Municipal Airport, CA23 mi55 minNW 310.00 miMostly Cloudy54°F54°F100%1016.8 hPa

Wind History from PAO (wind in knots)
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Last 24hrCalm5N7--N10--N15NW12
G20
N15NW15--NW15
G23
NW10------------------NW5Calm
1 day agoSE8SE85--N7--N10N12N12N14NW12--NW10------------------Calm--
2 days ago--E6--NE13NW10--NW12N9SW9SW14
G20
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G23
SW15SW12------------------E6SE6

Tide / Current Tables for Palo Alto Yacht Harbor, California
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Palo Alto Yacht Harbor
Click for Map
Tue -- 12:50 AM PDT     2.42 feet Low Tide
Tue -- 12:51 AM PDT     Moonset
Tue -- 05:46 AM PDT     7.76 feet High Tide
Tue -- 05:47 AM PDT     Sunrise
Tue -- 12:25 PM PDT     Moonrise
Tue -- 01:03 PM PDT     -0.21 feet Low Tide
Tue -- 07:01 PM PDT     7.70 feet High Tide
Tue -- 08:32 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.72.434.56.27.47.775.74.12.61.30.3-0.20.21.73.85.97.27.77.46.65.64.5

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Tue -- 12:46 AM PDT     0.00 knots Slack
Tue -- 12:50 AM PDT     Moonset
Tue -- 03:05 AM PDT     0.91 knots Max Flood
Tue -- 05:47 AM PDT     Sunrise
Tue -- 05:55 AM PDT     -0.01 knots Slack
Tue -- 10:29 AM PDT     -1.20 knots Max Ebb
Tue -- 12:25 PM PDT     Moonrise
Tue -- 01:11 PM PDT     0.01 knots Slack
Tue -- 04:02 PM PDT     1.40 knots Max Flood
Tue -- 07:25 PM PDT     -0.01 knots Slack
Tue -- 08:32 PM PDT     Sunset
Tue -- 11:24 PM PDT     -0.83 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.40.10.70.90.80.5-0-0.4-0.7-1-1.2-1.1-0.7-0.10.61.21.41.30.90.3-0.2-0.5-0.7-0.8

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 (11,2,3,4)
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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.