Sunday, May26, 2019 L-36.com


Marine Weather and Tides
San Rafael, 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 5:50AMSunset 8:23PM Sunday May 26, 2019 9:14 AM PDT (16:14 UTC) Moonrise 1:01AMMoonset 11:53AM Illumination 48% Phase: Third Quarter Moon; Moon at 22 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- 843 Am Pdt Sun May 26 2019
.small craft advisory in effect until 3 pm pdt this afternoon...
Today..W winds 15 to 25 kt...diminishing to 10 to 20 kt this afternoon. A chance of showers and a slight chance of Thunderstorms.
Tonight..W winds 5 to 10 kt.
Memorial day..SW winds 5 to 15 kt with gusts up to 25 kt.
Mon night..W winds 5 to 15 kt with gusts up to 25 kt.
Tue..SW winds 10 to 20 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 15 kt with gusts up to 25 kt.
Wed..SW winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 843 Am Pdt Sun May 26 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A passing storm system bringing breezy to locally gusty northwest winds across the waters today. Unstable atmospheric conditions will result in showers and isolated Thunderstorms during the day. Moderate northwest swell continues through the weekend with steep fresh seas generated by gusty winds.


7 Day Forecast for Marine Location Near San Rafael, CA
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location: 37.98, -122.47     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 261557
afdmtr
area forecast discussion
national weather service san francisco bay area
857 am pdt Sun may 26 2019

Synopsis Light rain will move through the area during early
morning hours, with gusty west to northwest winds developing near
the coast. Rain will change to showers along with isolated
thunderstorms today along with unseasonably cool daytime
temperatures. Dry but cool conditions are forecast for memorial
day. A gradual warming trend is expected early next week with
temperatures expected to return to near normal by midweek.

Discussion As of 08:57 am pdt Sunday... Morning water vapor
imagery clearly shows an upper level low spinning and slowly
drifting southward over the bay area. The passing upper low is
rather impressive for late may. Not only is it producing
precipitation, but it's very cold aloft. The oakland sounding had
-19c at 500mb (18,000 ft), which is the lowest 10% for may 26. The
cold air aloft has led to an unstable airmass with weak
instability. Kmux radar imagery continues to show instability
showers moving over the bay area this morning. Some of these
showers are producing locally heavy rain. There were a few heavy
showers at the forecast office this morning. A few automated gages
picked up a quick 0.16" in an hour. Given the cold air aloft some
of the showers will mix or become all snow over the highest peaks
above big sur. Sfc obs at 5,000 feet are in the low to mid 30s
and the profiler near pt sur has snow levels at 5,100 feet. Not
much accumulation expected, but more impressive for snow along the
central coast late may.

For the rest of the day - the upper low will continue to spin and
move southward. Scattered showers will be possible. Latest
forecast models still indicate weak instability, which may result
in an isolated thunderstorm through this afternoon. 12z koak
sounding does show a cap at ~650mb. Forecast soundings do show the
cap going this afternoon, which may be enough for a thunderstorm.

Thunderstorms are more likely over the central valley.

Temperatures will remain seasonably cool this afternoon with highs
mainly in the 60s.

Will likely do a near term forecast update this morning to fine
tune the details and to better reflect reality.

Prev discussion As of 3:07 am pdt Sunday... Kmux is showing a band
of light rain moving from north to south across the cwa, with rain
currently occurring in monterey. Rainfall totals thus far have
generally been under a tenth of an inch. This rain band is the
frontal band associated with a cold upper level low that is moving
south along the coast. Winds behind this front are increasing
from the northwest with gusts in the 20 to 30 mph range. The cold
air behind this front, along with the upper low, will initiate
scattered showers across the district along with the possibility
of thunderstorms throughout the day. By late morning, the upper
low is progged to be located over the san francisco bay area. This
placement will give the greatest precip potential to the southern
half of the district where up to a half inch of rain is possible,
most across the coastal ranges.

High temperatures today are forecast to range from the mid 50s to
mid 60s... With cooler readings expected in the hills. These
temperatures will be as much as 20 degrees cooler than normal for
late may. Snow levels dropping to as low as 4500 feet could bring
light snowfall accumulations to the higher peaks and ridges of
the santa lucia mountains in monterey county. There may even be
brief light snow at the summit mount hamilton.

The upper low will then move to the southeast overnight with
northwest winds decreasing and showers ending by morning. Memorial
day is expected to be mostly dry and warmer as high pressure
begins to build along the coast. This ridge of high pressure will
usher in a warming trend through the rest of the week with high
temperatures returning to near normal for this time of year.

Aviation As of 5:17 am pdt Sunday... Unseasonably cold upper
low continues to move rapidly southward through the northern half
of the district. Gusty northwest winds at many bay area terminals
including strong and gusty winds approaching 50 mph per mesowest
obs in the north bay mountains and east bay hills mtns. Low level
wind shear indicated in ksts TAF until 17z this morning. Expect
additional showers and the potential for isolated thunderstorms
including small hail. Late may, increased seasonal angle of solar
incidence surface warming combined with any brief clearing will
tend to boost rather modest model forecast buoyancy (cape several
hundred j kg) potential higher mitigated somewhat by slightly
lowering dewpoint temperatures for a period of time through late
morning; not to underestimate today's potential for nearly ideal
convective overturning it's worthy of close monitoring throughout
the day. Slightly elevated precip water values arrive late today
and tonight in the atmospheric column per recent GFS output, wet
weather today moistening the boundary layer along with lighter
winds tonight could bring about a patch or two of fog early Monday
morning.

Vicinity of ksfo... MVFR, gusty west winds through morning at least,
winds tapering off in the afternoon. Showers. Possible thunderstorms
in the bay area today, will closely monitor radar and obs and will
add vcts to ksfo TAF if needed.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR-vfr, gusty west winds today. Showers
as the upper low sweeps by later this morning and early afternoon
a few thunderstorms are possible.

Marine As of 2:30 am pdt Sunday... Unseasonably chilly weather
for late may is arriving this morning on gusty northwest winds.

Unstable atmospheric conditions will result in showers and
isolated thunderstorms through today. Moderate northwest swell
continues through the weekend with steep fresh seas generated by
gusty winds.

Mtr watches warnings advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Rough bar advisory for sf bar
sca... Sf bay until 3 pm
sca... Mry bay until 3 pm
public forecast: mm sims
aviation: canepa
marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RCMC1 - 9414863 - Richmond, CA 5 mi51 min W 11 G 15 54°F 60°F1009.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 6 mi70 min NNW 13 53°F 1009 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 8 mi51 min WNW 11 G 16 55°F 1009.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 12 mi51 min W 18 G 23 55°F 1008.2 hPa
FTPC1 - 9414290 - San Francisco, CA 12 mi51 min WNW 9.9 G 17 53°F 58°F1010.1 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 13 mi51 min Calm G 0 54°F 1008.7 hPa
PXSC1 13 mi51 min 55°F 46°F
OBXC1 14 mi45 min 54°F 46°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 14 mi45 min WNW 11 G 16 54°F 1009.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 14 mi45 min W 15 G 19
46237 - San Francisco Bar, CA (142) 16 mi45 min 55°F6 ft
LNDC1 16 mi45 min W 11 G 14 54°F 1009.7 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi51 min W 13 G 17 54°F 62°F1010.3 hPa
UPBC1 19 mi45 min WNW 18 G 29
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi45 min W 17 G 23 55°F 62°F1008.6 hPa49°F
PCOC1 - 9415144 - Port Chicago, CA 23 mi45 min W 18 G 25 54°F 62°F1008.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi35 min WNW 19 G 25 53°F 54°F1010.7 hPa
PRYC1 - 9415020 - Point Reyes, CA 27 mi45 min 53°F1009.6 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi90 min W 12 52°F 1008 hPa44°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 31 mi45 min WNW 17 G 22 56°F 1008 hPa
RTYC1 - 9414523 - Redwood City, CA 35 mi45 min W 13 G 20 55°F 66°F1010.8 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 48 mi45 min NW 18 G 21 51°F1009.5 hPa

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA12 mi20 minW 14 G 2310.00 miA Few Clouds57°F44°F63%1009.1 hPa
Napa, Napa County Airport, CA19 mi21 minW 1510.00 miMostly Cloudy57°F46°F67%1007.5 hPa
Petaluma Municipal Airport, CA20 mi40 minW 17 G 248.00 miFair54°F46°F77%1008.5 hPa
Concord, Buchanan Field, CA22 mi22 minWSW 7 G 2210.00 miMostly Cloudy56°F39°F55%1008 hPa
Oakland, Metro Oakland International Airport, CA23 mi22 minWNW 1810.00 miMostly Cloudy and Breezy56°F44°F65%1010.5 hPa

Wind History from DVO (wind in knots)
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Last 24hrN6CalmS10SE8S8SE8SE8SW12W16
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1 day agoCalmN5NW4E44CalmE5
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N13N13CalmCalmSW7CalmCalmCalmSW6CalmCalmCalmSW5CalmNE6
2 days agoSE5CalmE6
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Tide / Current Tables for Point San Quentin, San Francisco Bay, California
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Point San Quentin
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Sun -- 01:18 AM PDT     2.65 feet Low Tide
Sun -- 02:00 AM PDT     Moonrise
Sun -- 05:51 AM PDT     Sunrise
Sun -- 06:01 AM PDT     4.12 feet High Tide
Sun -- 09:34 AM PDT     Last Quarter
Sun -- 12:52 PM PDT     Moonset
Sun -- 12:59 PM PDT     0.40 feet Low Tide
Sun -- 08:22 PM PDT     Sunset
Sun -- 08:23 PM PDT     4.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.92.72.733.53.94.143.52.71.91.10.60.40.61.222.93.74.34.64.64.23.7

Tide / Current Tables for Point San Pablo Midchannel, San Pablo Bay, California Current
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Point San Pablo Midchannel
Click for Map
Sun -- 12:13 AM PDT     -1.45 knots Max Ebb
Sun -- 02:00 AM PDT     Moonrise
Sun -- 02:53 AM PDT     0.00 knots Slack
Sun -- 05:23 AM PDT     1.14 knots Max Flood
Sun -- 05:51 AM PDT     Sunrise
Sun -- 08:08 AM PDT     -0.00 knots Slack
Sun -- 09:34 AM PDT     Last Quarter
Sun -- 11:37 AM PDT     -2.36 knots Max Ebb
Sun -- 12:52 PM PDT     Moonset
Sun -- 03:28 PM PDT     0.00 knots Slack
Sun -- 07:09 PM PDT     1.97 knots Max Flood
Sun -- 08:22 PM PDT     Sunset
Sun -- 10:25 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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-1.4-1.3-0.80.10.81.11.10.70.1-0.9-1.8-2.3-2.3-2.1-1.5-0.50.51.31.821.81.30.4-0.6

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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Wind Forecast for San Francisco/Monterey Bay Area, CA (12,3,4,5)
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Ground Weather Radar Station Sacramento, 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.