Wednesday, May22, 2019 L-36.com


Marine Weather and Tides
Stanford, 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 5:52AMSunset 8:17PM Wednesday May 22, 2019 1:39 AM PDT (08:39 UTC) Moonrise 11:04PMMoonset 8:08AM Illumination 89% Phase: Waning Gibbous; Moon at 18 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- 852 Pm Pdt Tue May 21 2019
.small craft advisory in effect until 3 am pdt Wednesday...
Tonight..W winds 15 to 25 kt...diminishing to 10 to 20 kt after midnight.
Wed..W winds 5 to 15 kt.
Wed night..W winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt.
Thu night..SW winds 15 to 25 kt with gusts up to 30 kt.
Fri..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri night..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
Sun..SW winds 5 to 15 kt.
PZZ500 852 Pm Pdt Tue May 21 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Rapidly building northwest swell will arrive this evening and overnight with seas in excess of 15 feet along with larger near shore breaking waves. Low pressure will move inland over oregon and into the great basin on Wednesday. This will result in increasing northwest winds with gale force gusts expected over the northern and outer waters. Scattered showers will come to an end early Wednesday. Gale force winds and large nw swell will create hazardous conditions through midweek with moderate wind and seas persisting through the end of the week. A cool upper trough will keep unsettled weather over the region into the holiday weekend.


7 Day Forecast for Marine Location Near Stanford, CA
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location: 37.45, -122.17     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 220548
afdmtr
area forecast discussion
national weather service san francisco bay area
1048 pm pdt Tue may 21 2019

Synopsis A passing upper level low pressure will keep scattered
showers over the region today and tonight. Thunderstorms will be
possible late tonight over the coastal waters. Drier conditions
develop on Wednesday with temperatures warming slightly.

Unseasonably cool and unsettled conditions look to persist through
the upcoming weekend yet widespread rainfall appears less likely.

Discussion As of 9:54 pm pdt Tuesday... Weak light shower echos
continue to show up on kmux reflectivity as an upper level low
treks from northern to southern california over the next 12 to 24
hours. Most locations throughout the san francisco bay area
recorded at least a tenth of an inch or two of rain over the past
24 hours, with some locations in the hills and mountains exceeding
a quarter and even a half-inch. The highest rain totals today
have been confined to our east in the sierra foothills where 1-2
inches fell at some stations. The weak light rain showers over our
area will likely continue over the next several hours before
gradually diminishing in coverage from north to south in the early
morning hours. For Wednesday, dry conditions are forecast to
return to the region with some inland areas warming about 4 to 8
degrees from today. Don't anticipate on making any updates to the
short-term forecast grids at the present. For additional forecast
details, please refer to the previous discussion section.

Prev discussion As of 12:53 pm pdt Tuesday... Kmux radar
imagery this afternoon looks very similar to the morning. Widely
scattered showers tracking from NW to se. Showers were initially
associated with the passing of a weak frontal boundary, but now in
a post frontal regime showers remain. Dual pol radar imagery has
also indicated that some of the showers are likely producing heavy
rain and small hail. For what it's worth freezing levels are
rather low for late may. Observations at chews ridge (5k ft) above
big sur are still in the mid 30s. Definitely a cold damp day for
the higher peaks around the region.

Longwave pattern indicates an upper level low near ca or border
drifting southward into norcal. Water vapor further confirms
position and movement of said low pressure. Latest short term
models bring the low southward tonight into early Wednesday
morning. As the upper low moves southward, more specifically the
cold core associated with it, instability will increase. Showers
will continue as the cold pool moves overhead. Several runs of
the models have keyed in on the coastal waters and the central
coast (big sur) for the greatest likelihood of precip.

Additionally, enough instability will be present to warrant a
slight chance for thunderstorms over the coastal waters late
tonight into early Wednesday.

A few lingering showers will be possible early Wednesday, but
shower activity will quickly diminish as the low moves south and
inland. Despite the departing upper low a broad lingering trough
will remain. Temperatures will warm on Wednesday into the 60s and
mid 70s, which is still about 5 to 8 degrees below normal for may.

The medium and long range models keep the broad upper level trough
parked over the region into next week. Several disturbances rotate
through the trough. Best chance for precip still appears to be
eastward of the cwa, especially the sierra. However, another upper
low does pass overhead this weekend and will bring a return of a
scattered showers. Needless to say, an usual pattern for the
region.

Aviation As of 10:45 pm pdt Tuesday... An upper level low will
track southeast across the california interior with the trough
axis passing through tonight. This will bring one more round of
scattered showers to the area tonight. Most of the showers will be
along the coast and over the waters so mry has the best chance
for showers while sfo oak sjc and sns have a slight chance as
well. West winds still blowing to 20 kt but is expected to
decrease by 12z. MVFR CIGS will start clearing out after 15z with
full clearing after 17z.

Vicinity of ksfo... MVFR CIGS with bases in the 2500-3500 foot
range. A few light showers over the coastal hills could drift over
sfo through 10z. West winds to 18 kt decreasing after 10z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS through Monday morning with
scattered showers through 12z.

Marine As of 10:38 pm pdt Tuesday... Rapidly building northwest
swell will arrive this evening and overnight with seas in excess
of 15 feet along with larger near shore breaking waves. Low
pressure will move inland over oregon and into the great basin on
Wednesday. This will result in increasing northwest winds with
gale force gusts expected over the northern and outer waters.

Scattered showers will come to an end early Wednesday. Gale force
winds and large NW swell will create hazardous conditions through
midweek with moderate wind and seas persisting through the end of
the week. A cool upper trough will keep unsettled weather over
the region into the holiday weekend.

Mtr watches warnings advisories
Tngt High surf advisory... Caz006-505-509-529-530
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
sca... Sf bay until 3 am
sca... Mry bay until 3 am
public forecast: rowe mm
aviation: W pi
marine: W pi
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 5 mi40 min W 14 G 20 55°F 63°F1011.2 hPa (-1.5)
AAMC1 - 9414750 - Alameda, CA 23 mi46 min W 9.9 G 15 56°F 61°F1011 hPa
LNDC1 25 mi40 min WNW 9.9 G 13 55°F 1010.3 hPa (-1.3)
OBXC1 26 mi40 min 56°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi40 min WNW 12 G 14 55°F 1010.4 hPa (-1.2)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 26 mi40 min WNW 12 G 16
PXSC1 27 mi40 min 56°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 27 mi40 min W 7 G 13 54°F 1009.4 hPa (-1.3)
FTPC1 - 9414290 - San Francisco, CA 29 mi46 min WNW 6 G 12 54°F 58°F1011 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 33 mi40 min WNW 12 G 17 56°F 1010.4 hPa (-1.2)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 34 mi161 min NW 7 54°F 1012 hPa
46237 - San Francisco Bar, CA (142) 34 mi70 min 56°F11 ft
RCMC1 - 9414863 - Richmond, CA 35 mi46 min WNW 9.9 G 15 56°F 59°F1010.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi40 min W 13 G 18 56°F 62°F1009.7 hPa (-1.0)56°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 41 mi40 min NW 21 G 27 55°F 57°F1011.2 hPa (-1.5)
UPBC1 41 mi40 min W 19 G 22
PCOC1 - 9415144 - Port Chicago, CA 42 mi40 min W 13 G 19 56°F 62°F1010.1 hPa (-0.6)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 42 mi40 min W 13 G 16 55°F 1009.7 hPa (-1.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi40 min WNW 11 G 14 55°F 1009.6 hPa (-0.3)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 48 mi50 min WNW 21 G 25 55°F 57°F12 ft1011.3 hPa (-0.9)
MLSC1 - Moss Landing, South Harbor, CA 49 mi27 min WNW 13 G 37 55°F 1012.1 hPa51°F
ELXC1 - Elkhorn Slough Reserve, CA 49 mi115 min NW 6 54°F 1013 hPa50°F
46092 - MBM1 49 mi77 min WNW 18 56°F 57°F1011.8 hPa (-0.5)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Palo Alto Airport, CA3 mi4.9 hrsW 13 G 2210.00 miRain55°F48°F77%1011.8 hPa
San Carlos Airport, CA7 mi4.9 hrsW 14 G 208.00 miLight Rain55°F48°F77%1012.2 hPa
Mountain View, Moffett Field, CA7 mi1.7 hrsW 1110.00 miOvercast55°F48°F77%1011.9 hPa
San Jose, San Jose International Airport, CA14 mi47 minWNW 1010.00 miMostly Cloudy54°F48°F83%1010.7 hPa
Hayward, Hayward Air Terminal, CA15 mi46 minW 1610.00 miOvercast55°F48°F77%1011.4 hPa
San Francisco, San Francisco International Airport, CA15 mi1.7 hrsW 168.00 miMostly Cloudy53°F48°F86%1011.5 hPa
Oakland, Metro Oakland International Airport, CA17 mi47 minWNW 1710.00 miMostly Cloudy56°F48°F77%1010.5 hPa
Half Moon Bay Airport, CA18 mi45 minNW 17 G 237.00 miOvercast54°F50°F88%1011.5 hPa
San Jose / Reid / Hillv, CA20 mi3.9 hrsWNW 1210.00 miMostly Cloudy55°F46°F72%1012.5 hPa

Wind History from PAO (wind in knots)
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Last 24hr------------------W6W6W8W11NW17
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1 day ago------------------4CalmCalmCalmN7N9NW13NW7W7
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2 days ago------------------NW4555SE7--W9
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W5W5W5W5

Tide / Current Tables for Palo Alto Yacht Harbor, California
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Palo Alto Yacht Harbor
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Wed -- 03:27 AM PDT     8.22 feet High Tide
Wed -- 05:54 AM PDT     Sunrise
Wed -- 09:07 AM PDT     Moonset
Wed -- 10:54 AM PDT     -0.58 feet Low Tide
Wed -- 04:55 PM PDT     6.60 feet High Tide
Wed -- 08:16 PM PDT     Sunset
Wed -- 11:25 PM PDT     3.23 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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45.57.18.18.175.53.82.20.8-0.2-0.6-01.53.45.26.36.66.35.85.24.53.83.3

Tide / Current Tables for Dumbarton Hwy Bridge, South San Francisco Bay, California Current
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Dumbarton Hwy Bridge
Click for Map
Wed -- 12:56 AM PDT     1.12 knots Max Flood
Wed -- 03:29 AM PDT     -0.00 knots Slack
Wed -- 05:54 AM PDT     Sunrise
Wed -- 07:21 AM PDT     -1.36 knots Max Ebb
Wed -- 09:07 AM PDT     Moonset
Wed -- 10:54 AM PDT     0.01 knots Slack
Wed -- 02:10 PM PDT     1.69 knots Max Flood
Wed -- 05:32 PM PDT     -0.00 knots Slack
Wed -- 08:02 PM PDT     -0.55 knots Max Ebb
Wed -- 08:16 PM PDT     Sunset
Wed -- 10:53 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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11.10.90.4-0.2-0.7-1.1-1.3-1.3-0.9-0.50.10.91.51.71.61.20.5-0.2-0.5-0.6-0.4-0.20

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 (4,6,7,8)
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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.