Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Rio Vista, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 5:45AMSunset 8:35PM Wednesday June 28, 2017 12:04 AM PDT (07:04 UTC) Moonrise 9:58AMMoonset 11:13PM Illumination 18% Phase: Waxing Crescent; Moon at 4 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- 900 Pm Pdt Tue Jun 27 2017
.small craft advisory in effect until 11 pm pdt tonight...
.small craft advisory in effect from Wednesday morning through Wednesday evening...
Tonight..SW winds 10 to 20 kt. Patchy fog after midnight.
Wed..SW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Patchy fog in the morning.
Wed night..SW winds 15 to 25 kt...becoming S 5 to 15 kt after midnight. Patchy fog after midnight.
Thu..SW winds 10 to 20 kt. Patchy fog in the morning.
Thu night..SW winds 10 to 20 kt. Patchy fog after midnight.
Fri..SW winds 15 to 25 kt...decreasing to 5 to 15 kt. Patchy fog.
Sat..SW winds 5 kt...increasing to 5 to 15 kt. Patchy fog.
Sun..SW winds 5 to 15 kt. Patchy fog.
PZZ500 900 Pm Pdt Tue Jun 27 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will continue to build into the eastern pacific through the rest of the week. As such, moderate to strong northerly winds will continue to increase over the waters and bays through the majority of the forecast period. Southerly swell and wind driven waves will dominate and persist through Wednesday morning.

7 Day Forecast for Marine Location Near Rio Vista, CA
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location: 38.15, -121.69     debug


Area Discussion for - Sacramento, CA
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Fxus66 ksto 280355
afdsto
area forecast discussion
national weather service sacramento ca
855 pm pdt Tue jun 27 2017

Synopsis
Near average temps thru mid-week followed by a warming trend.

Discussion
Strong delta breeze working tonight helping to bring cooler
air into the interior. A very weak trough remains over the
region helping to keep the stronger onshore flow. Onshore
pressure gradient is currently 3.6 mb between sfo-sac and the
delta breeze is expected to stay up through the night. Marine
layer is currently at around 2000 feet and models indicate a
chance for some patches of low clouds to make it into the
sacramento area again late tonight. Generally the same locations
as this morning. Many temperatures in the region should cool into
the mid 50s by morning with the north end of the valley cooling to
the mid 60s. Mountain valley temperatures generally cooling into
the 30s and 40s. Only slight warming expected on Wednesday above
today's highs.

Previous discussion weaker delta breeze today than yesterday
resulted in a few degrees of warming in the delta influenced
areas, while temps mostly followed persistence or were just
slightly warmer elsewhere.

Yesterday's short wave trof is now over id and moving farther away
allowing flat ridging to build in its wake. However, a weak trof
is moving into the pac NW with a weak short wave moving across
norcal early this evening. Hence, the delta breeze should increase
again, but likely not quite as strong (or to the extent) as the
recent past. That makes for a lower probability (less of a chance)
of stratus making it inland in a similar fashion than the
previous two mornings. Marginal instability is forecast over the
nrn mtns, mostly over the trinity alps and siskiyous, where short-
lived convection may materialize, just N or our cwa.

Warming returns wed-fri as ridging over the eastern pacific moves
onto the west coast. This will suppress the marine layer weakening
onshore flow and resulting in modest synoptic warming. 850 mbs and
low level thickness values suggest another 2-4 degrees of warming or
so over most locales each day for the next couple of days. That
means triple digit heat will likely return to the NRN sac valley
thu-fri and possibly into the SRN sac vly. The question is, will
the delta breeze arrive on time Fri afternoon to keep MAX temps
below 100 in the SRN sac vly? With the gfs ECMWF faster with the
incoming trof than the gem on Fri (gfs ECMWF well E of 130w, while
the gem is along 130w), the chances are good that a delta breeze
will be initiated in time to provide some cooling in the delta
influenced areas. The passing trof will promote a cooling breeze
fri nite and its fast movement will allow heights to rebuild
rapidly on sat. Nly flow in the wake of the trof will provide a
rapid warm-up on sat. Jhm
.Extended discussion (Saturday through Tuesday)
forecast models indicate a weak short wave trough moving across
the forecast area on Saturday with minimal impacts. Have nudged
up temperatures on Saturday given northerly flow and a weak delta
breeze. Therefore, a slight warm up is expected near the delta
influenced areas, while triple digit heat could be expected over
the northern sacramento valley. Temperatures will remain above
normal this weekend. Otherwise, highs could return to near average
for this time of the year early next week. However, there are
model differences at this point, with the ECMWF showing increasing
heights over the great basin. Dry weather will continue during
the extended period.

Aviation
Vfr conditions the next 24 hours. South to west winds 5 to 15 kt
will decrease overnight. Near the delta... Sw wind gusts up to 30
kt expected. A chance for some patches of MVFR CIGS around ksac to
kmhr 11z-15z.

Sto watches warnings advisories
None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 13 mi52 min WNW 16 G 20 61°F 1010.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 18 mi79 min W 8.9 58°F 1012 hPa54°F
PCOC1 - 9415144 - Port Chicago, CA 20 mi52 min SW 11 G 17 58°F 70°F1012.4 hPa
UPBC1 24 mi58 min W 11 G 13
MZXC1 - 9415102 - Martinez-Amorco CA 24 mi52 min WSW 8 G 13 60°F 69°F1013.1 hPa56°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 31 mi52 min SW 15 G 18 59°F 1012.7 hPa
LNDC1 40 mi52 min SW 6 G 8.9 58°F 1014.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi52 min SSW 8.9 G 11 59°F 1013.9 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 41 mi52 min WSW 8 G 12 58°F 1014.4 hPa
RCMC1 - 9414863 - Richmond, CA 41 mi52 min S 5.1 G 8 59°F 63°F1013.4 hPa
AAMC1 - 9414750 - Alameda, CA 42 mi52 min W 5.1 G 9.9 58°F 68°F1014.9 hPa
OBXC1 42 mi52 min 58°F 55°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 42 mi58 min SW 17 G 21
TIBC1 - Tiburon Pier, San Francisco Bay, CA 44 mi57 min SSW 6 56°F 1014 hPa
PXSC1 44 mi52 min 58°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi52 min W 2.9 G 12 57°F 1013.2 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi52 min W 8 G 17 56°F 59°F1014.3 hPa

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
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SW11
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G15
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SW8
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SW12
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G15

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fairfield / Travis Air Force Base, CA16 mi66 minWSW 23 G 3110.00 miFair and Windy59°F52°F77%1010.8 hPa
Vacaville Nut Tree Airport, CA21 mi71 minSSW 810.00 miFair68°F54°F61%1010.1 hPa
Concord, Buchanan Field, CA22 mi71 minSSW 14 G 2010.00 miFair60°F53°F78%1011.5 hPa

Wind History from SUU (wind in knots)
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Last 24hrSW18
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1 day agoSW22
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W12
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SW18W19
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2 days agoSW23
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SW16SW13SW11
G15
SW19

Tide / Current Tables for Rio Vista, Sacramento River, California
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Rio Vista
Click for Map
Wed -- 02:23 AM PDT     1.85 feet Low Tide
Wed -- 05:46 AM PDT     Sunrise
Wed -- 07:14 AM PDT     4.48 feet High Tide
Wed -- 10:57 AM PDT     Moonrise
Wed -- 02:39 PM PDT     -0.57 feet Low Tide
Wed -- 08:33 PM PDT     Sunset
Wed -- 09:04 PM PDT     3.96 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.72.21.91.92.43.34.14.54.33.62.71.70.80-0.5-0.5-0.10.923.13.743.83.5

Tide / Current Tables for Sherman Island (East), California Current
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Sherman Island (East)
Click for Map
Wed -- 01:59 AM PDT     0.00 knots Slack
Wed -- 04:58 AM PDT     0.93 knots Max Flood
Wed -- 05:46 AM PDT     Sunrise
Wed -- 07:46 AM PDT     -0.00 knots Slack
Wed -- 10:55 AM PDT     -1.48 knots Max Ebb
Wed -- 10:58 AM PDT     Moonrise
Wed -- 03:09 PM PDT     0.00 knots Slack
Wed -- 06:46 PM PDT     1.16 knots Max Flood
Wed -- 08:34 PM PDT     Sunset
Wed -- 09:40 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.400.50.80.90.80.5-0.2-0.9-1.3-1.5-1.3-1.1-0.6-0.10.40.81.11.20.90.4-0.2-0.6

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 Sacramento, CA (3,6,7,8)
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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.