Tuesday, May23, 2017 L-36.com


Marine Weather and Tides
Mountain House, CA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:48AMSunset 8:16PM Monday May 22, 2017 10:10 PM PDT (05:10 UTC) Moonrise 2:57AMMoonset 3:46PM Illumination 6% Phase: Waning Crescent; Moon at 27 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- 944 Pm Pdt Mon May 22 2017
.small craft advisory in effect from Tuesday afternoon through Tuesday evening...
Tonight..SW winds 10 to 20 kt.
Tue..SW winds 5 to 15 kt...increasing to 15 to 25 kt with a few gusts to 30 kt in the afternoon.
Tue night..SW winds 15 to 30 kt...decreasing to 10 to 20 kt near midnight. Patchy fog after midnight.
Wed..SW winds 10 to 20 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Wed night..SW winds 15 to 25 kt.
Thu..SW winds 10 to 20 kt.
Fri..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
PZZ500 944 Pm Pdt Mon May 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Surface high pressure over the eastern pacific will strengthen from tonight into Wednesday morning keeping northwesterly winds going over the outer waters. A surface ridge of high pressure over the central coast will cause winds over the inner coastal waters to be primarily light southwesterly through Tuesday. Except for the Monterey bay onshore winds will be gusty over the bays each afternoon and evening at least through mid-week.

7 Day Forecast for Marine Location Near Mountain House, CA
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location: 37.83, -121.57     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 230400
afdmtr
area forecast discussion
national weather service san francisco bay area
900 pm pdt Mon may 22 2017

Synopsis Look for cooler conditions through most of the week as
a onshore flow combines with the marine layer. Minor warming is
then expected during the upcoming weekend especially for inland
locations.

Discussion As of 9:00 pm pdt Monday... No forecast updates
planned for this evening with about a 1500 foot marine layer in
place along the immediate coast. Low clouds making their way
through the golden gate and into the berkeley hill as well as
spreading inland around the monterey bay region. Inland areas that
reached the 90s today will see more significant cooling for
Tuesday as onshore flow continues to increase with a deepening
marine layer in response to upper troughing aloft.

All available MOS data suggests continued cooling trend through
midweek for inland areas with robust onshore winds in place and
likely persistent stratus around the coast and bays. The trend
will be for near or below normal temperatures for much of the rest
of the work week.

Looking ahead to the long holiday weekend, long range models
suggest a seasonable weather pattern with dry and near normal
temps.

Prev discussion As of 1:15 pm pdt Monday... As expected temperatures
are running cooler for all locations away from the coast today
with many spots 5 to 12 degrees less than values from Sunday.

Current readings show a wide range from 50s and 60s to parts of
the coast with 70s and 80s inland. Still a few hours of heating,
so would expect the warmest inland spots to again get into the
90s, however the number of locations should be less than
yesterday. Satellite shows widespread clouds along the water and
with the minor onshore flow expected to continue, likely that many
of the local beaches will see little to no sunshine today.

Tonight will be a near repeat of last night with patchy fog along
the coast and to some inland spots. Lows will mostly be in the 50s
with 60s above 1500 feet.

Synoptically the ridge of high pressure in charge will begin to
flatten out through the week as a system dives down from canada
and works into the northern rockies. 500 mb heights will drop from
587 dm today to 573 dm by Thursday. Inland locations that have
been in the 90s the past few days will drop back into the upper
60s to the lower 70s. Closer to the coast widespread mid 50s to
mid 60s can be expected. With the onshore flow in place, much of
the week could by quite grey at the coast.

Longer range guidance shows the ridge trying to rebuild by the
weekend although heights will be less than the past few days. By
Sunday inland spots will be back in the mid 70s to mid 80s away
from the coast with 60s to mid 70s near the water.

Aviation As of 5:34 pm pdt Monday... The marine layer depth
varies from 700 feet over the bay area to 1200 feet over the north
central coast late this afternoon. The smx-sfo gradient is 2.3
mb; at present as well as tonight into Tuesday the NAM forecasts a
neutral gradient, applying a 2 mb correction a southerly component
to the coastal winds is likely to continue into Tuesday. The sfo-
sac gradient is 2 mb which is line with the nam, which predicts
stronger onshore gradient/wind developing Tuesday afternoon and
evening with sfo-sac gradient near 4 mb, similarly a moderate to
strong gradient and wind develops again Wednesday.

00z tafs for the bay area indicateVFR except southerly flow will
likely bring lifr/vlifr CIGS and vsbys to ksts late tonight and
Tuesday morning. Also, for monterey bay area ifr/lifr is likely
to develop this evening. Moderate to high forecast confidence.

Vicinity of ksfo...VFR. W-nw winds with occasional gusts to 20-25
knots til 05z this evening. Gusty w-nw winds resume Tuesday afternoon
and evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR then tempo ifr/lifr 02z-07z then ifr/lifr
prevailing tonight into late Tuesday morning.VFR returns late Tuesday
morning and afternoon, onshore winds will likely bring stratus and
fog back Tuesday evening.

Marine As of 08:51 pm pdt Monday... Northerly flow will persist
with light to moderate winds and small seas. High pressure will
strengthen north of the region increasing winds midweek. Winds
will be strongest north of point reyes, especially the outer
waters.

Mtr watches/warnings/advisories
Tngt Sca... Sf bay until 9 pm
public forecast: rww
aviation: canepa
marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 22 mi40 min WNW 12 G 15 71°F 1012.2 hPa
PCOC1 - 9415144 - Port Chicago, CA 29 mi40 min W 17 G 20 67°F 67°F1012.5 hPa
UPBC1 33 mi40 min WNW 13 G 20
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi40 min W 12 G 17 65°F 66°F1013.3 hPa58°F
SFXC1 - San Francisco Bay Reserve, CA 35 mi85 min WNW 9.9 68°F 1012 hPa57°F
LNDC1 38 mi40 min NNE 2.9 G 5.1 57°F 1014.5 hPa
AAMC1 - 9414750 - Alameda, CA 39 mi40 min WNW 6 G 9.9 56°F 64°F1015 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi40 min W 8 G 9.9 60°F 1013.4 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 40 mi40 min WNW 7 G 8.9 55°F 1014.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 40 mi40 min WNW 8 G 9.9
OBXC1 41 mi40 min 54°F 53°F
RTYC1 - 9414523 - Redwood City, CA 41 mi40 min NNW 9.9 G 12 58°F 70°F1013.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi40 min SSW 6 G 8 57°F 1014.5 hPa
PXSC1 44 mi40 min 54°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi40 min W 7 G 13 53°F 1013.6 hPa
RCMC1 - 9414863 - Richmond, CA 45 mi40 min WSW 4.1 G 7 57°F 61°F1014 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 47 mi43 min W 1.9 57°F 1014 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi40 min SW 5.1 G 11 52°F 53°F1014.9 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA16 mi17 minN 410.00 miFair74°F48°F40%1013 hPa
Stockton, Stockton Metropolitan Airport, CA18 mi15 minW 810.00 miFair78°F60°F54%1011.9 hPa

Wind History from LVK (wind in knots)
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Last 24hrNW4NW5NW4CalmCalmNW3CalmCalmCalmW3W43446SW63W9W10W10W10W7CalmN4
1 day agoCalmCalmNE3NE3E4E4CalmCalmCalmCalmSW4SW4W43S5W7S7SW5W8W10W11W9W4NW3
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm3CalmSW7SW85W9W9W13W12W10W4Calm

Tide / Current Tables for Borden Highway Bridge, Old River, San Joaquin River, California
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Borden Highway Bridge
Click for Map
Tue -- 04:35 AM PDT     Moonrise
Tue -- 04:59 AM PDT     3.20 feet High Tide
Tue -- 05:50 AM PDT     Sunrise
Tue -- 12:00 PM PDT     -0.07 feet Low Tide
Tue -- 05:55 PM PDT     Moonset
Tue -- 05:59 PM PDT     2.46 feet High Tide
Tue -- 08:16 PM PDT     Sunset
Tue -- 11:25 PM PDT     0.53 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.21.92.633.232.51.81.10.50.1-0.10.10.61.31.92.32.52.31.81.20.80.6

Tide / Current Tables for Vulcan Island .5 mi E, San Joaquin River, California Current
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Vulcan Island .5 mi E
Click for Map
Tue -- 01:53 AM PDT     0.81 knots Max Flood
Tue -- 04:34 AM PDT     Moonrise
Tue -- 05:21 AM PDT     -0.00 knots Slack
Tue -- 05:49 AM PDT     Sunrise
Tue -- 08:34 AM PDT     -0.59 knots Max Ebb
Tue -- 12:26 PM PDT     0.00 knots Slack
Tue -- 03:06 PM PDT     0.58 knots Max Flood
Tue -- 05:55 PM PDT     Moonset
Tue -- 06:16 PM PDT     -0.00 knots Slack
Tue -- 08:16 PM PDT     Sunset
Tue -- 08:44 PM PDT     -0.38 knots Max Ebb
Tue -- 11:41 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.70.80.70.50.1-0.2-0.4-0.6-0.6-0.5-0.3-0.10.20.50.60.50.40.1-0.2-0.3-0.4-0.3-0.2

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (1,6,7,8)
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Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map

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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.