Tuesday, May21, 2019 L-36.com


Marine Weather and Tides
Temelec, 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 5:51AMSunset 8:19PM Tuesday May 21, 2019 11:30 AM PDT (18:30 UTC) Moonrise 10:18PMMoonset 7:15AM Illumination 92% Phase: Waning Gibbous; Moon at 17 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 Am Pdt Tue May 21 2019
.small craft advisory in effect through late tonight...
Today..W winds 10 to 20 kt...increasing to 15 to 25 kt this afternoon. A chance of showers.
Tonight..W winds 15 to 25 kt with gusts up to 30 kt.
Wed..W winds 5 to 15 kt.
Wed night..SW winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt.
Thu night..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
PZZ500 852 Am 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... A passing cold front will bring scattered showers to the coastal waters today. Behind the front winds will increase out of the northwest resulting in hazardous conditions. An unseasonably large northwest swell will build over the waters throughout the day and combine with fresh seas to create hazardous conditions through Wednesday. Winds will continue to increase on Wednesday into Wednesday night with gale force gusts possible over the northern and outer waters.


7 Day Forecast for Marine Location Near Temelec, CA
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location: 38.22, -122.43     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 211816
afdmtr
area forecast discussion
national weather service san francisco bay area
1116 am pdt Tue may 21 2019

Synopsis A weak frontal boundary moving through the region will
result in periods of light rain through the morning with lingering
showers likely through tonight. 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 9:33 am pdt Tuesday... Surface analysis this
morning depicts a cold front moving through the bay area. The
passing frontal boundary brought scattered showers overnight
through the morning rush. A few of these showers did produce brief
heavy rain. Latest kmux radar imagery now shows a bulk of the
shower activity closer to the frontal boundary and mostly south
and east of sf bay.

For the rest of the day - scattered showers will continue this
morning as the front moves farther south and east. By this
afternoon a reinvigorated shot of shower activity will develop as
an upper low currently over S or moves toward the bay area. The
question arises - is there a need for thunder in the forecast this
afternoon? Koak sounding from the morning did show some weak cape,
but more importantly an inversion about 600mb. 12z models show
decent sfc and mu CAPE this afternoon across the N and E bay.

Further inspection on forecast point soundings do show the
instability, but also hold onto the upper level inversion.

Therefore, convective showers are likely, but the upper inversion
may limit potential to become a thunderstorm. The more likely
scenario is convective showers with some small hail, but no
lightning. Will leave forecast as is for now, but monitor closely
through the early afternoon.

Tonight on the other hand is a different story. The approaching
upper low is forecast to move over the bay area late tonight and
early Wednesday morning. The upper low is rather cold at 500mb
with temps of -26c, which is definitely abnormal for late may.

The cold core aloft may be enough to generate some nocturnal
convection, especially over the coastal waters. Thunderstorm
probability from guidance gives a 20 percent chance. May need to
add some thunder over the waters tonight. Elsewhere showers will
be possible tonight.

Prev discussion As of 02:53 am pdt Tuesday... A weak frontal system
is currently moving inland across the region this morning as the
core of a mid upper level low approaches the pacific northwest
coast. Rainfall during the past 6 hours or so ranges from a few
hundredths of an inch for most urban locations with isolated
amounts from 0.25" to 0.40, especially in the coastal ranges of
the north bay. Look for rain showers to spread over the south bay,
santa cruz mountains and remainder of the central coast through
sunrise. In wake of the frontal passage, isolated to scattered
showers are likely to persist through the afternoon. May even see
a renewed chance of showers late tonight over the central coast as
the mid upper level disturbance drops southward across the
region. Overall, rainfall amounts will be minimal with this
passing system. Afternoon temperatures are forecast to only warm
into the upper 50s near the coast to lower middle 60s inland.

Drying conditions are then forecast to develop by Wednesday morning
as the aforementioned upper level trough shifts inland. Broad
troughing is then likely to remain in place over the western portion
of the country through late week. Temperatures inland will warm into
the upper 60s to lower 70s late in the week, near to slightly below
seasonal averages. While showers will be possible across the
interior portion of the state late in the week, mainly dry
conditions look to prevail over the san francisco bay area and
central coast.

Cannot rule out rain chances returning to the region by the upcoming
weekend as the upper level trough retrogrades back toward the west
and an upper level low drops southward along the coast. This pattern
will also keep temperatures below seasonal averages heading toward
the end of the month. Definitely an unusual pattern for this time
of year and something worth watching in the coming days.

Aviation As of 11:16 am pdt Tuesday... For 18z tafs. Showers
and low CIGS to continue this afternoon but should wane after
sunset. Gusty west winds to impact most terminals as well. Final
shortwave may bring some showers to monterey bay region overnight
into early weds morning. Lingering moisture with cyclonic flow
aloft could mean plenty of CIGS for weds morning (similar to what
was observed Monday).

Vicinity of ksfo... BorderlineVFR MVFR conditions with cigs
between 2500-4000 ft agl. Scattered showers remain in the area and
will continue on and off throughout the day before tapering off
tonight. West winds will increase thru afternoon with gusts
20-30kt.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Showers with MVFR CIGS to continue today
and then ease this evening. More showers return overnight through
early weds as final system impacts the monterey bay region.

Marine As of 10:46 am pdt Tuesday... A passing cold front will
bring scattered showers to the coastal waters today. Behind the
front winds will increase out of the northwest resulting in
hazardous conditions. An unseasonably large northwest swell will
build over the waters throughout the day and combine with fresh
seas to create hazardous conditions through Wednesday. Winds will
continue to increase on Wednesday into Wednesday night with gale
force gusts possible over the northern and outer waters.

Mtr watches warnings advisories
Tday 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 from 11 am
sca... Sf bay
sca... Mry bay
public forecast: mm
aviation: rww
marine: mm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 14 mi30 min WNW 12 G 15 58°F 1012.9 hPa (-0.3)
UPBC1 21 mi30 min WNW 12 G 21
SFXC1 - San Francisco Bay Reserve, CA 21 mi105 min W 9.9 57°F 1013 hPa49°F
RCMC1 - 9414863 - Richmond, CA 21 mi36 min W 9.9 G 14 58°F 60°F1013.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 21 mi30 min WNW 20 G 23 56°F 62°F1013 hPa (-0.3)56°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 22 mi30 min WNW 12 G 18 59°F 1013.6 hPa (-0.5)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi115 min Calm 56°F 1014 hPa
PCOC1 - 9415144 - Port Chicago, CA 24 mi30 min W 23 G 30 57°F 62°F1013.1 hPa (+0.0)
PXSC1 29 mi30 min 58°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 29 mi30 min W 17 G 25 57°F 1012.8 hPa (+0.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 29 mi30 min W 20 G 23
OKXC1 - 9414776 - Oakland (Berth 34), CA 29 mi30 min W 16 G 20 56°F 1013.7 hPa (-0.3)
OBXC1 29 mi30 min 57°F 52°F
FTPC1 - 9414290 - San Francisco, CA 29 mi30 min W 13 G 19 56°F 60°F1014 hPa
LNDC1 30 mi30 min W 13 G 18 57°F 1013.8 hPa (+0.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 31 mi30 min WNW 7 G 12 58°F 1012.8 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 32 mi36 min W 11 G 17 57°F 61°F1014.3 hPa
46237 - San Francisco Bar, CA (142) 32 mi60 min 58°F7 ft
PRYC1 - 9415020 - Point Reyes, CA 33 mi30 min 57°F1014.1 hPa (+0.4)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 39 mi30 min W 18 G 23 56°F 57°F1014.9 hPa (+0.0)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 46 mi30 min WNW 19 G 23 55°F1014.2 hPa (+0.6)

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Napa, Napa County Airport, CA8 mi36 minW 15 G 219.00 miLight Rain57°F51°F81%1011.7 hPa
Novato / Gnoss Field, CA8 mi35 minWNW 14 G 199.00 miMostly Cloudy59°F50°F72%1013.2 hPa
Petaluma Municipal Airport, CA10 mi55 minW 12 G 197.00 miMostly Cloudy59°F55°F88%1012.9 hPa

Wind History from DVO (wind in knots)
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S4SW9W10SW7W7SW5CalmCalmCalmCalmCalmCalmCalmCalmN4CalmN4CalmNE3N6
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Tide / Current Tables for Wingo, Sonoma Creek, San Pablo Bay, California
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Wingo
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Tue -- 03:25 AM PDT     6.02 feet High Tide
Tue -- 05:54 AM PDT     Sunrise
Tue -- 08:15 AM PDT     Moonset
Tue -- 11:12 AM PDT     -1.37 feet Low Tide
Tue -- 05:39 PM PDT     4.66 feet High Tide
Tue -- 08:18 PM PDT     Sunset
Tue -- 11:10 PM PDT     2.49 feet Low Tide
Tue -- 11:18 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.14.25.35.95.95.44.32.91.3-0-1-1.4-1.1-0.21.12.53.74.54.64.33.83.22.72.5

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
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Tue -- 02:37 AM PDT     -0.00 knots Slack
Tue -- 05:54 AM PDT     Sunrise
Tue -- 06:19 AM PDT     -0.91 knots Max Ebb
Tue -- 08:16 AM PDT     Moonset
Tue -- 10:36 AM PDT     0.00 knots Slack
Tue -- 01:35 PM PDT     0.58 knots Max Flood
Tue -- 05:07 PM PDT     -0.00 knots Slack
Tue -- 07:11 PM PDT     -0.32 knots Max Ebb
Tue -- 08:18 PM PDT     Sunset
Tue -- 09:31 PM PDT     0.00 knots Slack
Tue -- 11:17 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.50.2-0.2-0.5-0.8-0.9-0.9-0.8-0.6-0.20.10.40.60.60.50.30-0.2-0.3-0.3-0.10.20.5

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 (14,3,4,5)
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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.