Saturday, December7, 2019
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Marine Weather and Tides
Rio Vista, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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 7:07AMSunset 4:48PM Saturday December 7, 2019 2:31 PM PST (22:31 UTC) Moonrise 2:27PMMoonset 2:30AM Illumination 84% Phase: Waxing Gibbous; Moon at 11 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- 928 Am Pst Sat Dec 7 2019
.small craft advisory in effect until 9 pm pst this evening...
Today..S winds 15 to 25 kt with gusts up to 35 kt. Showers and a slight chance of Thunderstorms.
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt. Showers and a slight chance of Thunderstorms.
Sun..SW winds up to 10 kt. Rain likely.
Sun night..N winds around 5 kt.
Mon..W winds up to 10 kt. Patchy fog.
Mon night..W winds up to 10 kt.
Tue..NE winds up to 10 kt.
Wed..NE winds up to 10 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 928 Am Pst Sat Dec 7 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A secondary frontal boundary will move through the coastal waters today. Scattered Thunderstorms will move into the coastal waters which could produce lightning, gusty winds, and possible waterspouts. Breezy to gusty south to southwest winds will continue through the day today before diminishing this evening. A moderate west swell will continue through Sunday. Steep wind waves will continue through the day today creating hazardous seas.


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 071207 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 407 AM PST Sat Dec 7 2019


SYNOPSIS. A strong winter storm will bring periods of heavy rain, mountain snow, strong winds, and hazardous travel this weekend. Dry conditions return next week with near average temperatures.

DISCUSSION. The closed low is currently sitting at 130W this morning with one embedded disturbance moving into southern OR. Radar imagery does show a quite a few showers over interior NorCal, with the bulk of the precip currently located over NW CA. Expect to see increasing chances for precip again later today as the next wave moves in. This will bring periods of moderate to heavy rain and mountain snow, along with the chance for some Valley thunderstorms. Instability, shear, LI, and a favored vort max support the chance for storm activity. HREF probabilities continue to high light the potential for over a half inch of rain an hour for portions of the foothill and Valley regions. Some blesses form over Lake and Butte counties in particular, thus we kept the Flash Flood Watch going for the the Carr/Hirz/Delta, Camp, and Mendocino Complex burn areas.

For those also, or perhaps more interested in the snow forecast, snow levels are expected to be around 6500-7000ft throughout most of the day, but will slowly be falling this evening. The profiler at Colfax this morning depicts snow levels around 7500ft. Expect to see moderate to heavy mountain snow over the Sierra Nevada today, especially for areas above 6500ft. Significant travel impacts are expected. Gusty winds may create near white out conditions at times in combination with heavy snowfall rates. Snow levels do drop slightly by early Sunday morning as the low moves over NorCal, with snow down to about 5500-6000ft. Feet of snow are still expected by the end of this system. The Winter Storm Warning continues through early afternoon Sunday.

Finally, we can expect to see breezy winds continue in the Valley through much of the morning and into the early afternoon hours. Wind gusts of 30-45 mph will be possible, mainly for the northern portion of the Sacramento Valley.

Looking to Sunday, showers will linger over the area with the possibility for some isolated thunderstorms, mainly south of HWY 36. As the mid level wave pushes out of NorCal chances for precip will dwindle, with drier weather expected for the evening. Ridging returns Monday with average temperatures and dry weather expected through Tuesday.

EXTENDED DISCUSSION (Wednesday THROUGH Saturday).

Ensemble guidance continues indicate zonal flow across the eastern Pacific later next week with ridging across NorCal. The pattern will bring potential for light warm-advection precipitation across the northern mountains, but the remainder of the area will likely remain dry. Temperatures will be slightly above average.

AVIATION.

Widespread MVFR, with local IFR, conditions next 24 hours as Pacific storm system continues to bring showers to the region. Southerly surface wind gusts 25-35 kts, strongest over the northern Sacramento Valley, gradually tapering after 00Z Sunday. Isolated thunderstorms possible 18Z-00Z accompanied by small hail and surface wind gusts to 45 kts. Snow levels 6500-7500 ft.

STO WATCHES/WARNINGS/ADVISORIES. Flash Flood Watch through this afternoon for Central Sacramento Valley-Clear Lake/Southern Lake County-Mountains Southwestern Shasta County to Northern Lake County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Shasta Lake Area / Northern Shasta County-Western Plumas County/Lassen Park.

Winter Storm Warning until 1 PM PST Sunday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park.

Wind Advisory until 1 PM PST this afternoon for Carquinez Strait and Delta-Central Sacramento Valley-Mountains Southwestern Shasta County to Northern Lake County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Northern San Joaquin Valley-Southern Sacramento Valley.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 13 mi50 min SW 11 G 20 65°F 1011.6 hPa
SFXC1 - San Francisco Bay Reserve, CA 18 mi47 min SW 13 60°F 1012 hPa55°F
PCOC1 - 9415144 - Port Chicago, CA 20 mi50 min SSW 9.9 G 15 60°F 53°F1011.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 24 mi50 min S 15 G 20 61°F 54°F1011.8 hPa
UPBC1 24 mi44 min SW 14 G 21
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 31 mi44 min SSW 19 G 26 60°F 1010.8 hPa
LNDC1 40 mi50 min SSW 14 G 19 60°F 1012.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi44 min S 21 G 26 61°F 1012.1 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 41 mi50 min SSW 15 G 19 59°F 1012 hPa
RCMC1 - 9414863 - Richmond, CA 41 mi50 min S 14 G 22 54°F1011.4 hPa
AAMC1 - 9414750 - Alameda, CA 42 mi50 min S 13 G 16 54°F1012.7 hPa
OBXC1 42 mi50 min 59°F 59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi44 min SE 11 G 16 61°F 1010.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 44 mi27 min SE 14 60°F 1011 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi50 min S 8.9 G 22 54°F1012 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 mi94 minS 20 G 2710.00 miLight Rain and Breezy64°F51°F64%1012.5 hPa
Vacaville Nut Tree Airport, CA21 mi39 minS 14 G 2310.00 miOvercast61°F54°F78%1011.7 hPa
Concord, Buchanan Field, CA22 mi39 minS 138.00 miLight Rain62°F55°F78%1010.4 hPa

Link to 5 minute data for KSUU

Wind History from SUU (wind in knots)
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Last 24hrS5S5S8S8S3S4CalmSW8SW6CalmCalmSE5SE8S7SE6S5S4SE7SE12S14S24
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1 day agoE3E4NE6NE6NE3NE7N6N8--SE3CalmCalmE4E4CalmCalmCalmCalmCalmE4CalmE6SE8SE9
2 days agoNE6NE7N5N6N8
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NE9NE8NE6N4CalmCalmCalmN3N4--N5N5N6N6NE6NE6E6E7E3

Tide / Current Tables for Rio Vista, Sacramento River, California
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Rio Vista
Click for Map
Sat -- 02:30 AM PST     Moonset
Sat -- 06:34 AM PST     1.19 feet Low Tide
Sat -- 07:09 AM PST     Sunrise
Sat -- 12:04 PM PST     4.26 feet High Tide
Sat -- 02:26 PM PST     Moonrise
Sat -- 04:46 PM PST     Sunset
Sat -- 07:35 PM PST     0.56 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.92.72.52.321.61.31.21.72.53.444.34.13.83.32.71.91.20.70.61.11.82.5

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
Sat -- 01:03 AM PST     -0.00 knots Slack
Sat -- 02:31 AM PST     Moonset
Sat -- 03:46 AM PST     -0.75 knots Max Ebb
Sat -- 06:48 AM PST     0.00 knots Slack
Sat -- 07:10 AM PST     Sunrise
Sat -- 09:50 AM PST     1.15 knots Max Flood
Sat -- 01:34 PM PST     -0.00 knots Slack
Sat -- 02:27 PM PST     Moonrise
Sat -- 04:47 PM PST     Sunset
Sat -- 04:52 PM PST     -1.02 knots Max Ebb
Sat -- 08:22 PM PST     0.00 knots Slack
Sat -- 11:03 PM PST     0.78 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40-0.4-0.7-0.7-0.6-0.30.10.71.11.210.80.3-0.2-0.7-0.9-1-0.9-0.6-0.20.30.60.8

Weather Map
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wmap_P
GEOS 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 (17,4,5,8)
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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.