Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Mountain House, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:49AMSunset 8:14PM Sunday May 20, 2018 6:08 PM PDT (01:08 UTC) Moonrise 10:12AMMoonset 12:00AM Illumination 36% Phase: Waxing Crescent; Moon at 6 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- 241 Pm Pdt Sun May 20 2018
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..W winds 10 to 20 kt with gusts up to 35 kt... Becoming sw 5 to 15 kt with gusts up to 25 kt after midnight. Patchy drizzle after midnight.
Mon..SW winds 10 to 20 kt with gusts up to 30 kt.
Mon night..SW winds 10 to 20 kt with gusts up to 30 kt.
Tue..SW winds 10 to 20 kt with gusts up to 30 kt.
Tue night..SW winds 10 to 20 kt with gusts up to 30 kt.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed night..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu..SW winds up to 10 kt.
Fri..SW winds up to 10 kt.
PZZ500 241 Pm Pdt Sun May 20 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to strong northwesterly winds will persist over the coastal waters through Monday in response to a tight north to south pressure gradient along the coast. These winds will result in steep wind waves as well and produce hazardous conditions for small crafts. A long period southerly swell will increase and mix with northwesterly swell by Monday morning, gradually increasing through much of the 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 202348
afdmtr
area forecast discussion
national weather service san francisco bay area
448 pm pdt Sun may 20 2018

Synopsis Upper low over california will keep temperatures below
normal at least through Tuesday. Weak ridge builds around midweek
with temperatures near normal before another trough approaches
Friday through Sunday with onshore winds keeping temperatures on
the cool side of normal while mainly dry conditions are forecast.

Discussion As of 1:42 pm pdt Sunday... Below normal
temperatures and breezy onshore winds continue to be the main
forecast trend. So far this afternoon temps generally running from
the upper 50s beaches, 60s around the bay and 70s well inland.

Cloud decks are around 2500 feet deep along the coast due to an
upper low over the region. The ben lomond raws up in the santa
cruz mountains is sitting in the cloud layer and so far reporting
a high of only 49 degrees so far this afternoon. Onshore gradient
of 2.5 mb from sfo to sac is pushing some gusty winds from the
golden gate out into the delta with sfo gusting to 33 mph last
hour.

Looking forward the last few NAM runs have generated some coastal
drizzle tonight with cyclonic flow aloft and moist onshore flow
lifting the boundary layer. Coastal hills from san mateo southward
to monterey that are exposed to NW winds off the ocean is where
the modeling is showing some measurable drizzle type QPF that
should it develop will be localized.

Main forecast theme to start the work week will be continued below
normal temps and breezy onshore winds. The north bay may see the
most sunshine on Monday with drier north northeast flow around
the upper low. MOS data showing 79 degrees for santa rosa on
Monday while most cities around the bay will see 60s once again
with some lower 70s for the santa clara valley.

The upper low slowly ejects inland by Tuesday but a deep marine
layer and onshore flow will likely remain in its wake with
continued trend of below normal temps and onshore breezes.

Some weak ridging or zonal type flow develops weds afternoon into
Thursday sending temps back to near normal.

Longwave trough approaches by Friday afternoon with onshore winds
and approaching upper low sending inland temps back below normal
once again for Saturday and Sunday of the upcoming memorial day
weekend. Latest ECMWF does indicate system may be progressive
with warmer high pressure by memorial day Monday but that scenario
may be dubious with developing tropical system in the gulf of
mexico potentially slowing the large scale west to east flow
across the us.

Aviation As of 4:48 pm pdt Sunday... It'sVFR with a few areas
MVFR ceilings mainly on the coast this afternoon. Low clouds will
generally fill in again tonight and Monday morning. Mid to high
clouds with a 500 mb closed low will slowly move eastward this
evening into Monday.

Vicinity of ksfo... MVFR ceiling tonight into Monday morning, westerly
wind gusting to 30 knots this evening. Gusty westerly wind resumes
Monday afternoon and evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ceilings tonight into Monday morning.

Partial clearing possible either by late Monday morning or early
afternoon.

Marine As of 01:17 pm pdt Sunday... A strong north to south
pressure gradient along the california coast will maintain
moderate to strong northwesterly winds over the coastal waters
through Monday. As a result, steep wind waves will produce
hazardous conditions for small crafts. A long period southerly
swell will increase and mix with northwesterly swell by Monday
morning, gradually increasing through much of the week.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 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
public forecast: rww
aviation: canepa
marine: rgass
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 22 mi50 min W 11 G 21 64°F 1011.3 hPa
PCOC1 - 9415144 - Port Chicago, CA 29 mi50 min SW 8.9 G 15 64°F 65°F1011.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi50 min SSW 14 G 19 64°F1012 hPa
SFXC1 - San Francisco Bay Reserve, CA 35 mi83 min W 13 65°F 1011 hPa50°F
LNDC1 38 mi50 min WSW 14 G 17 56°F 1013.3 hPa
AAMC1 - 9414750 - Alameda, CA 39 mi56 min W 13 G 19 56°F 64°F1013.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi50 min W 18 G 21 60°F 1011.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 40 mi50 min W 18 G 26 56°F 1012.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 40 mi50 min W 22 G 26
OBXC1 41 mi50 min 56°F 51°F
RTYC1 - 9414523 - Redwood City, CA 41 mi50 min W 13 G 17 56°F 65°F1015.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 42 mi50 min W 5.1 G 12 62°F 1013.1 hPa
PXSC1 44 mi56 min 56°F 50°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi50 min W 13 G 22 56°F 1012.1 hPa
RCMC1 - 9414863 - Richmond, CA 45 mi56 min NW 8.9 G 14 60°F 61°F1012.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 47 mi81 min S 2.9 61°F 1013 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi56 min WSW 9.9 G 18 55°F 57°F1013.5 hPa

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
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G22
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G18
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA16 mi75 minWSW 1510.00 miFair60°F48°F67%1013.4 hPa
Stockton, Stockton Metropolitan Airport, CA18 mi73 minW 18 G 2210.00 miFair and Breezy72°F46°F40%1011 hPa

Wind History from LVK (wind in knots)
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Last 24hrSW14W10SW10W12SW7W10SW10SW10W11SW12SW9SW14W10W10SW14
G20
SW12SW10
G22
SW13SW11W14W15W16W15W11
1 day agoW15W10W10W9W8W8W8W6W10W8W9W8W6W10W8W9W13W13W15W12W12W15W14
G22
W15
2 days agoW14W10W8W9SW10--W7W5W8W6W6W8W9W8W8W9W8W7SW85W16W15W16W15

Tide / Current Tables for Borden Highway Bridge, Old River, San Joaquin River, California
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Borden Highway Bridge
Click for Map
Sun -- 12:07 AM PDT     2.54 feet High Tide
Sun -- 12:44 AM PDT     Moonset
Sun -- 05:03 AM PDT     1.09 feet Low Tide
Sun -- 05:52 AM PDT     Sunrise
Sun -- 10:24 AM PDT     3.08 feet High Tide
Sun -- 11:11 AM PDT     Moonrise
Sun -- 06:17 PM PDT     -0.36 feet Low Tide
Sun -- 08:13 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.52.421.61.21.11.21.62.22.8332.72.21.50.80.3-0.1-0.3-0.30.10.71.42

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
Sun -- 12:43 AM PDT     Moonset
Sun -- 12:44 AM PDT     -0.00 knots Slack
Sun -- 02:56 AM PDT     -0.23 knots Max Ebb
Sun -- 05:22 AM PDT     0.00 knots Slack
Sun -- 05:51 AM PDT     Sunrise
Sun -- 07:56 AM PDT     0.60 knots Max Flood
Sun -- 11:03 AM PDT     -0.00 knots Slack
Sun -- 11:10 AM PDT     Moonrise
Sun -- 02:27 PM PDT     -0.60 knots Max Ebb
Sun -- 06:49 PM PDT     0.00 knots Slack
Sun -- 08:13 PM PDT     Sunset
Sun -- 10:19 PM PDT     0.61 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0.1-0.2-0.2-0.2-0.10.20.50.60.50.30-0.2-0.5-0.6-0.6-0.5-0.4-0.20.10.40.50.60.6

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (21,6,7,8)
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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.