Tuesday, May21, 2019 L-36.com


Marine Weather and Tides
Alameda, 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 8:18PM Tuesday May 21, 2019 7:34 PM PDT (02:34 UTC) Moonrise 10:16PMMoonset 7:16AM Illumination 90% 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- 246 Pm Pdt Tue May 21 2019
.small craft advisory in effect through late tonight...
Rest of today..W winds 15 to 25 kt with gusts up to 30 kt.
Tonight..W winds 15 to 25 kt with gusts up to 30 kt.
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.
Sat..SW winds 5 to 15 kt.
PZZ500 246 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. Showers and isolated Thunderstorms will be possible overnight as one last system drops down the coast. Behind this boundary strong and gusty northerly winds will develop with gale warnings now posted for Wednesday across much of the outer waters along with the near shore waters from point arena to point reyes. 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 Alameda, CA
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location: 37.78, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 212320
afdmtr
area forecast discussion
national weather service san francisco bay area
420 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 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 4:30 pm pdt Tuesday... Scattered showers are
popping up in the unstable airmass mainly over the sfo bay area
and inland areas. This activity will diminish after 03-04z when
the Sun GOES down. An upper level low will track southeast across
the california interior with the trough axis passing through
overnight tonight. Scattered showers will be limited to the
mry bay area and coastal areas as the trajectory of the trough
causes the sfo bay area to be rain-shadowed. All precip ends after
midmorning Wednesday with scattered cumulus clouds the rest of the
day. Winds gusting to 25-30 kt will only decrease slightly after
dark and will not really ease up until after 12z.

Vicinity of ksfo... MVFR CIGS with bases in the 3000-4000 foot
range. Scattered light showers through 04z. CIGS possibly
lowering to 2500 ft late tonight after 13z. West winds 20-24 kt
gusting to 30 kt decreasing after 13z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS with showers activity picking
up after 08z continuing through 15z.

Marine As of 04:06 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. Showers
and isolated thunderstorms will be possible overnight as one last
system drops down the coast. Behind this boundary strong and gusty
northerly winds will develop with gale warnings now posted for
Wednesday across much of the outer waters along with the near
shore waters from point arena to point reyes. 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: mm
aviation: W pi
marine: mm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 1 mi41 min W 13 G 19 57°F 62°F1011.9 hPa
LNDC1 1 mi41 min NW 11 G 17 58°F 1011.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 3 mi41 min WNW 12 G 17
OBXC1 4 mi41 min 58°F 47°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 4 mi41 min WNW 13 G 18 57°F 1011.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 6 mi41 min W 8.9 G 17 57°F 1010.4 hPa
PXSC1 6 mi41 min 58°F 49°F
FTPC1 - 9414290 - San Francisco, CA 10 mi41 min WNW 15 G 23 56°F 59°F1011.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 10 mi41 min WNW 17 G 24 59°F 1010.8 hPa
RCMC1 - 9414863 - Richmond, CA 12 mi41 min WNW 15 G 21 58°F 60°F1011 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi78 min N 7 57°F 1012 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 19 mi41 min WNW 17 G 25 59°F 1010 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi41 min W 20 G 25 58°F 62°F1010.1 hPa54°F
46237 - San Francisco Bar, CA (142) 19 mi65 min 58°F13 ft
RTYC1 - 9414523 - Redwood City, CA 19 mi41 min WNW 20 G 23 56°F 63°F1012.7 hPa
UPBC1 20 mi41 min WNW 20 G 30
PCOC1 - 9415144 - Port Chicago, CA 23 mi41 min W 24 G 27 58°F 62°F1010.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi41 min WNW 18 G 26 59°F 1009.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi35 min WNW 23 G 31 56°F 57°F1012.2 hPa (-1.4)
SFXC1 - San Francisco Bay Reserve, CA 32 mi110 min W 12 62°F 1010 hPa48°F
PRYC1 - 9415020 - Point Reyes, CA 40 mi41 min 59°F1011.9 hPa

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA6 mi42 minW 24 G 2710.00 miMostly Cloudy and Windy59°F48°F67%1011.5 hPa
Hayward, Hayward Air Terminal, CA12 mi41 minW 17 G 2310.00 miMostly Cloudy58°F46°F67%1012.3 hPa
San Francisco, San Francisco International Airport, CA12 mi99 minW 21 G 299.00 miMostly Cloudy and Breezy58°F48°F70%1012.1 hPa
San Carlos Airport, CA17 mi48 minW 11 G 208.00 miLight Rain57°F46°F67%1012.5 hPa
Concord, Buchanan Field, CA18 mi42 minW 17 G 2410.00 miPartly Cloudy61°F45°F56%1009 hPa
Palo Alto Airport, CA22 mi48 minW 14 G 1910.00 miShowers in Vicinity55°F48°F77%1012.2 hPa
Half Moon Bay Airport, CA22 mi40 minNW 15 G 286.00 miOvercast with Haze55°F48°F77%1012.5 hPa

Wind History from OAK (wind in knots)
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1 day agoW10W7W7W5SW3CalmNE3NE3N3CalmNE3CalmN3W7W8W9W7W11W11W13W15W13W13W11
2 days agoSE15S18S20SE19S17S10SW10W11SW10S9S12SW10
G22
S5S10S9SW5W8SW14SW17W11SW8W10W9SW7

Tide / Current Tables for Alameda, San Francisco Bay, California
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Alameda
Click for Map
Tue -- 01:42 AM PDT     6.59 feet High Tide
Tue -- 05:54 AM PDT     Sunrise
Tue -- 08:16 AM PDT     Moonset
Tue -- 08:38 AM PDT     -1.01 feet Low Tide
Tue -- 03:46 PM PDT     5.30 feet High Tide
Tue -- 08:17 PM PDT     Sunset
Tue -- 08:39 PM PDT     2.82 feet Low Tide
Tue -- 11:16 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.86.46.664.72.91.2-0.1-0.9-1-0.40.61.83.24.35.15.34.94.13.42.92.83.24

Tide / Current Tables for Oakland Inner Harbor Reach, 33 ft. below datum Current
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Oakland Inner Harbor Reach
Click for MapFlood direction 82 true
Ebb direction 255 true

Tue -- 01:48 AM PDT     -0.01 knots Slack
Tue -- 04:40 AM PDT     -0.50 knots Max Ebb
Tue -- 05:54 AM PDT     Sunrise
Tue -- 07:41 AM PDT     0.01 knots Slack
Tue -- 08:16 AM PDT     Moonset
Tue -- 12:35 PM PDT     0.38 knots Max Flood
Tue -- 03:39 PM PDT     -0.00 knots Slack
Tue -- 05:18 PM PDT     -0.22 knots Max Ebb
Tue -- 07:36 PM PDT     0.00 knots Slack
Tue -- 08:17 PM PDT     Sunset
Tue -- 11:16 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.20.1-0-0.3-0.5-0.5-0.4-0.200.20.30.30.40.40.30.1-0.1-0.2-0.2-0.100.10.20.2

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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Wind Forecast for San Francisco/Monterey Bay Area, CA (22,6,7,8)
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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.