Saturday, October16, 2021
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Marine Weather and Tides
Discovery Bay, CA

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 7:14AMSunset 6:28PM Saturday October 16, 2021 1:46 AM PDT (08:46 UTC) Moonrise 4:02PMMoonset 2:09AM Illumination 77% Phase: Waxing Gibbous; Moon at 10 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- 833 Pm Pdt Fri Oct 15 2021
Tonight..NE winds 5 to 10 kt.
Sat..NE winds 5 to 10 kt.
Sat night..SW winds 5 to 10 kt.
Sun..SW winds 15 to 20 kt with gusts up to 30 kt. A slight chance of rain.
Sun night..W winds 10 to 20 kt with gusts up to 30 kt. A chance of rain.
Mon..W winds 10 to 15 kt.
Mon night..W winds around 5 kt.
Tue..S winds 5 to 10 kt. A chance of rain.
Wed..SE winds 5 to 10 kt. Rain likely.
PZZ500 833 Pm Pdt Fri Oct 15 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will remain light to moderate winds prevail through the weekend.a weak northwest prevails. Winds will increase out of the northwest as a cold front arrives late Sunday into early Monday. This front brings with it a chance of light to moderate scattered rain showers over the waters.


7 Day Forecast for Marine Location Near Discovery Bay, CA
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location: 37.89, -121.49     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 160537 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 1036 PM PDT Fri Oct 15 2021

SYNOPSIS. Warm and dry weather continues into the weekend. Cooler weather along with a chance of precipitation returns Sunday afternoon and night. More unsettled weather mid to late week into next weekend.

DISCUSSION. The Evening Update: Onshore flow will return by afternoon on Sat as the ridge axis shifts Ewd into the 4-Corners region ahead of an advancing Ern Pac trof. The trof/low pressure system will move rapidly across Norcal Sun nite/early Mon. A vigorous vort max is forecast to be embedded in the fast-moving trof which may result in some relatively brief heavy showers on the NE quadrant of the vort max Sun nite, impacting our NErn mtn ones. Some of the modeling is hinting that there may be enough instability for a brief thunderstorm or two as this vort max moves across Norcal. Timing of this trof is gradually evolving around a similar speed or solution. This system will bring windy conditions to the Sierra as it approaches the CWA on Sun, and continuing Sun nite into Mon as the system moves E of our area. JHM

Previous Discussion.

High pressure has built into NorCal and that is bringing pleasant weather to end the week. Highs this afternoon will top out in the lower 80s across the Valley and 60s and 70s over the higher elevations. The upper level ridge and high pressure will begin to track east on Saturday but will still be the main influence for our weather bringing another great fall day. Highs will be similar tomorrow to what we saw today but will be a bit warmer in the higher elevations.

A quick moving short wave trough will then approach the area for Sunday, this will bring changing conditions. Clouds will begin to build in Saturday night and we should see light showers reach the Coastal Range by late morning/early afternoon Sunday associated with the cold front. Showers will continue to overspread the area during the afternoon and evening as the cold front works east. The cold front looks to clear the area by the mid evening but showers are going to linger into Sunday night as the trough axis spins through. This system will have some moisture to work with but overall QPF totals will be low, generally less then 0.10" in the Valley and 0.10" to 0.40" over the higher elevations. Snow levels will be just under pass level Sunday but will start to fall Sunday night falling to around 5500 feet early in the night. A few inches of snow will be possible above 5500 feet with the biggest snow impacts coming after the sun sets into the early overnight Sunday.

Short wave ridging builds in on Monday but cool air will build in behind the departing systems. This will bring a chilly day with Valley highs only in the 60s and 40s and 50s in the higher elevations.

-CJM

EXTENDED DISCUSSION (Tuesday THROUGH Friday). A shift to unsettled weather is expected for much of the extended forecast. Clusters continue to indicate an initial wave ahead of the main trough which will bring some precipitation chances to far northern California Tuesday into Wednesday. With this push, the best chances for precipitation will be in the higher elevations north of Highway 50, with some slight chances in the Valley. From here, the main deep trough remains relatively stagnant until late Friday into the weekend when more widespread chances for precipitation are expected throughout the entire area. Exact timing and QPF amounts are hard to say at this time, as there is quite a bit of difference in deterministic models. Overall, expect a wetter and colder pattern to take hold for the end of next week and keep up to date with the forecast.

AVIATION. VFR conditions expected over the next 24 hours over interior Northern California. Winds generally less than 10 kts.

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 23 mi53 min W 1G1.9 60°F 1018.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 31 mi53 min S 5.1G6 58°F 64°F1018.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 35 mi53 min SE 1G1 57°F 63°F1018.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 36 mi62 min 0 51°F 1022 hPa41°F
LNDC1 42 mi53 min 0G1 62°F 1018.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 43 mi53 min 0G1 60°F 1018.2 hPa
AAMC1 - 9414750 - Alameda, CA 44 mi53 min 0G1.9 62°F 63°F1019 hPa
OBXC1 45 mi53 min 64°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 45 mi53 min NNE 2.9G2.9 61°F 1018.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 45 mi53 min NNE 2.9G4.1
PPXC1 - 9414847 - Richmond (Point Potrero), CA 46 mi53 min N 8.9G12 63°F 1018.9 hPa
RTYC1 - 9414523 - Redwood City, CA 47 mi53 min SW 1G1.9 60°F 1019.3 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 48 mi53 min W 1.9G2.9 64°F 1017.6 hPa
PXSC1 48 mi53 min 65°F 45°F
RCMC1 - 9414863 - Richmond, CA 49 mi53 min SW 1G1 64°F 61°F1018.8 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA13 mi52 minN 010.00 miFair52°F38°F59%1018.5 hPa
Livermore, Livermore Municipal Airport, CA22 mi54 minENE 310.00 miFair55°F34°F45%1018.5 hPa

Link to 5 minute data for KSCK

Wind History from SCK (wind in knots)
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Last 24hr------------------0S4S3SW4SW3S50SW4SW3W30N3000
1 day agoNW6NW7N3N30NW6NW6W6NW6NW7N13NW11
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2 days agoE4E4E3SE3S4SE4SE4SE60000S34NW8W10NW9NW7NW8W8W7W7W8NW7

Tide / Current Tables for Borden Highway Bridge, Middle River, San Joaquin River, California
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Borden Highway Bridge
Click for Map
Sat -- 03:09 AM PDT     Moonset
Sat -- 03:56 AM PDT     2.79 feet High Tide
Sat -- 07:15 AM PDT     Sunrise
Sat -- 11:07 AM PDT     -0.17 feet Low Tide
Sat -- 05:02 PM PDT     Moonrise
Sat -- 05:18 PM PDT     2.89 feet High Tide
Sat -- 06:26 PM PDT     Sunset
Sat -- 11:11 PM PDT     0.54 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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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
Sat -- 01:04 AM PDT     0.52 knots Max Flood
Sat -- 03:08 AM PDT     Moonset
Sat -- 04:04 AM PDT     -0.00 knots Slack
Sat -- 07:15 AM PDT     Sunrise
Sat -- 07:52 AM PDT     -0.54 knots Max Ebb
Sat -- 11:18 AM PDT     0.00 knots Slack
Sat -- 02:35 PM PDT     0.73 knots Max Flood
Sat -- 05:01 PM PDT     Moonrise
Sat -- 05:45 PM PDT     -0.00 knots Slack
Sat -- 06:25 PM PDT     Sunset
Sat -- 08:30 PM PDT     -0.43 knots Max Ebb
Sat -- 11:18 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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Weather Map
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GEOS Local Image of CentralWestCoast    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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