Thursday, June20, 2019 L-36.com


Marine Weather and Tides
Rio Vista, CA

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:42AMSunset 8:34PM Thursday June 20, 2019 6:38 AM PDT (13:38 UTC) Moonrise 10:22PMMoonset 7:44AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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- 233 Am Pdt Thu Jun 20 2019
.small craft advisory in effect from noon pdt today through this evening...
Today..SW winds 5 to 15 kt...becoming W 15 to 25 kt with gusts up to 30 kt this afternoon.
Tonight..SW winds 15 to 25 kt...diminishing to 5 to 15 kt overnight.
Fri..SW winds 5 to 15 kt...becoming W 15 to 25 kt with gusts up to 30 kt this afternoon.
Fri night..SW winds 15 to 25 kt...diminishing to 5 to 15 kt overnight.
Sat..SW winds 5 to 15 kt...becoming W 15 to 25 kt with gusts up to 30 kt this afternoon.
Sat night..SW winds 15 to 25 kt...diminishing to 5 to 15 kt overnight.
Sun..SW winds 5 to 15 kt...becoming W 15 to 25 kt with gusts up to 30 kt this afternoon.
Mon..SW winds 5 to 15 kt...becoming W 15 to 25 kt with gusts up to 30 kt this afternoon.
PZZ500 233 Am Pdt Thu Jun 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light southerly winds will persist along the coast south of point reyes through midday today then gradually veer to the northwest in the late afternoon. Strong gale force winds across the northern outer waters are forecast to spread farther south late this afternoon prompting gale warnings over the outer waters to expand in coverage. Stronger winds are forecast across all coastal waters this evening into Friday. These winds will result in steep fresh swell creating hazardous seas conditions, especially for smaller vessels.


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 201108
afdsto
area forecast discussion
national weather service sacramento ca
408 am pdt Thu jun 20 2019

Synopsis
Cooling today with daytime temperatures near normal then a little
below normal on Friday as a low pressure system drops through the
pacific northwest and into the northern great basin. Breezy
north winds behind the departing low pressure system will bring
elevated fire weather concerns tonight through Saturday. Warmer
than normal over the weekend with cooling again next week.

Discussion
A strong delta breeze continues this morning with coastal status
making it into the delta and even into parts of the southern
sacramento valley. The sacramento executive airport is showing
overcast cloudiness at this time. Elsewhere, skies are clear this
morning under upper level high pressure ridging. Temperatures are
running several degrees cooler this morning than 24 hours ago as a
low continues to drop into the pacific northwest. The increased
onshore flow will bring a significant cool off today with daytime
highs expected to come in around normal for this time of year. By
late this afternoon the upper low center is predicted to be over
the northern great basin with northerly flow developing over the
north state. Breezy winds will begin to develop today but mainly
over the northern sacramento valley. Coverage of these increased
winds will be limited so the timing of the fire weather watch has
been trimmed out of the today forecast period. Northerly surface
pressure gradients and wind pick up tonight especially along the
west side of the sacramento valley. This will keep humidity
recovery limited in this area where a fire weather watch remains
in place. Higher rh outside of the windiest areas should preclude
the need for a fire weather watch until rh values drop on Friday.

Daytime temperatures cool a little more on Friday and should see
highs a little below normal. Combination of breezy north winds and
low humidity will still elevate fire concerns, however.

Combination of northerly surface gradient and good upper level
support from upper ridge pushing back in over the west coast will
keep breezy north winds going through most of the day Saturday.

Airmass warms a bit bringing daytime highs back up above normal
and keeping humidity relatively low for late june. Upper level
high pressure ridge pushes in over the state on Sunday bringing a
little more warming but lighter winds. This should allow humidity
to climb a bit and combined with the lighter winds should reduce
fire weather concerns slightly.

.Extended discussion (Monday through Thursday)
unseasonably deep 552 dm upper low from goa digs slowly southeast
towards west coast Monday into Tuesday, then shifts into the
pacnw Wednesday Thursday. This will result in increasing synoptic
cooling and delta breeze as heights thicknesses lower over
norcal. Not expecting precip with increased troughing, but should
see a deepening marine layer and enhanced onshore flow. High
temperatures cool from about 2 to 5 degrees above normal Monday to
4 to 8 degrees below normal Wednesday into Thursday. Low to mid
80s expected by the middle of next week in the central valley,
with 50s to 70s for the mountains and foothills.

Aviation
Vfr conds ovr intr norcal nxt 24 hrs exc areas MVFR ifr conds in
st vcnty of delta and lcly into SRN sac vly til 18z-20z. Swly sfc
wnd gsts up to 35 kts poss vcnty delta tda. N of kcic LCL nly sfc
wnd gsts to 25 kts tda and S of kcic LCL sly sfc wnd gsts to 25
kts.

Sto watches warnings advisories
Fire weather watch from this evening through Saturday afternoon
for central sacramento valley in glenn, colusa, yuba, northern
sutter, and butte county below 1000 ft-eastern mendocino nf-
eastern portion of shasta trinity nf-lake county portion of lake-
napa-sonoma unit-northern sacramento valley to southern tehama
county line below 1000 ft-northern sierra foothills from 1000 to
3000 ft. Includes portions of shasta-trinity and butte units-
southeast edge shasta-trinity nf and western portions of tehama-
glenn unit-southern sacramento valley in yolo-sacramento far
western placer, southern sutter and solano county below 1000 ft.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 13 mi51 min WNW 13 G 18 60°F 1010.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 18 mi114 min W 15 58°F 1011 hPa53°F
PCOC1 - 9415144 - Port Chicago, CA 20 mi51 min W 18 G 20 58°F 68°F1011.3 hPa
UPBC1 24 mi51 min W 15 G 18
MZXC1 - 9415102 - Martinez-Amorco CA 24 mi51 min W 12 G 16 57°F 67°F1011.6 hPa57°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 31 mi51 min WSW 16 G 22 58°F 1011.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi51 min SW 18 G 21 58°F 1012 hPa
LNDC1 40 mi51 min W 5.1 G 7 58°F 1012.1 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 41 mi51 min W 7 G 9.9 57°F 1012.1 hPa
RCMC1 - 9414863 - Richmond, CA 41 mi51 min 63°F
OBXC1 42 mi51 min 58°F 58°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 42 mi51 min WSW 9.9 G 11
AAMC1 - 9414750 - Alameda, CA 42 mi57 min WSW 5.1 G 6 58°F 66°F1012.5 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi51 min WSW 2.9 G 6 57°F 1011 hPa
PXSC1 44 mi51 min 58°F 57°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 44 mi70 min SW 13 55°F 1012 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi57 min WSW 9.9 G 15 55°F 58°F1012.5 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fairfield / Travis Air Force Base, CA16 mi1.7 hrsWSW 25 G 3110.00 miOvercast and Windy57°F52°F84%1010.1 hPa
Vacaville Nut Tree Airport, CA21 mi46 minSW 710.00 miFair59°F54°F83%1009.7 hPa
Concord, Buchanan Field, CA22 mi46 minW 710.00 miOvercast60°F52°F75%1010.1 hPa

Wind History from SUU (wind in knots)
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Tide / Current Tables for Rio Vista, Sacramento River, California
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Rio Vista
Click for Map
Thu -- 01:05 AM PDT     2.45 feet Low Tide
Thu -- 05:43 AM PDT     Sunrise
Thu -- 05:44 AM PDT     4.56 feet High Tide
Thu -- 08:43 AM PDT     Moonset
Thu -- 01:27 PM PDT     -0.60 feet Low Tide
Thu -- 08:17 PM PDT     3.35 feet High Tide
Thu -- 08:32 PM PDT     Sunset
Thu -- 11:22 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.62.42.63.13.84.44.54.13.32.31.30.5-0.2-0.6-0.5-00.91.92.73.23.33.33.23.1

Tide / Current Tables for Point Sacramento .3 mi NE, Sacramento River, California Current
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Point Sacramento .3 mi NE
Click for Map
Thu -- 12:46 AM PDT     0.00 knots Slack
Thu -- 03:18 AM PDT     1.00 knots Max Flood
Thu -- 05:44 AM PDT     Sunrise
Thu -- 06:40 AM PDT     -0.00 knots Slack
Thu -- 08:44 AM PDT     Moonset
Thu -- 10:07 AM PDT     -1.21 knots Max Ebb
Thu -- 02:27 PM PDT     0.00 knots Slack
Thu -- 05:39 PM PDT     1.01 knots Max Flood
Thu -- 08:33 PM PDT     Sunset
Thu -- 09:27 PM PDT     -0.00 knots Slack
Thu -- 11:21 PM PDT     -0.43 knots Max Ebb
Thu -- 11:22 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.20.10.710.90.70.3-0.2-0.7-1.1-1.2-1.2-1-0.7-0.20.30.8110.90.60.2-0.2-0.4

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Sacramento, CA (9,2,3,4)
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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.