Thursday, October28, 2021
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Marine Weather and Tides
August, 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 7:25AMSunset 6:11PM Thursday October 28, 2021 2:34 PM PDT (21:34 UTC) Moonrise 11:22PMMoonset 1:33PM Illumination 45% Phase: Third Quarter Moon; Moon at 23 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- 214 Pm Pdt Thu Oct 28 2021
Tonight..W winds 5 to 10 kt, diminishing to around 5 kt after midnight. Patchy fog after midnight.
Fri..SW winds 5 to 10 kt.
Fri night..SW winds 10 to 15 kt.
Sat..SW winds 5 to 10 kt. A slight chance of rain.
Sat night..SW winds 5 to 10 kt.
Sun..SW winds 5 to 10 kt.
Sun night..SW winds around 5 kt. A chance of rain.
Mon..SE winds 5 to 10 kt. A chance of rain.
Tue..W winds around 5 kt.
PZZ500 214 Pm Pdt Thu Oct 28 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A moderately large, longer period northwest swell continues to move through the coastal waters this afternoon. This wave energy peaked this morning and is gradually subsiding through the remainder of the day. Hazardous conditions for small craft vessels, particularly in the surf zone, near shoals, and at harbor entrances are possible through the remainder of the day. Generally breezy to locally gusty northwest winds are prevailing today and will continue to do so through the coming days.


7 Day Forecast for Marine Location Near August, CA
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location: 37.95, -121.28     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 282131 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 231 PM PDT Thu Oct 28 2021

SYNOPSIS. Dry and mild weather through Friday. A weather system moving over the far northern portion of California will bring a chance of showers late Friday and Saturday, mainly to the northern mountains and northern Sacramento Valley. Rain returns to the majority of Northern California early next week.

DISCUSSION. Fog and low stratus continued to build north into the northern San Joaquin Valley and Sacramento Valley this morning, as far north as the Sacramento metro area, and slowly dissipated through the morning hours. The fog/stratus kept temperatures dampened in the mid 60s through early afternoon in affected areas, whereas temperatures in the far northern Sacramento Valley rose quickly to the 70s. However, temperatures are bouncing back as high pressure remains situated over California. Valley temperatures are forecast to top out in the low 70s to near 80s across the Valley today and tomorrow with 50s to 60s in the mountains and foothills. HREF and HRRR guidance suggest patchy fog is possible once again tomorrow morning in the Valley, mainly near and south of the Sacramento area.

Ensemble guidance remains on track with a tight, closed upper low approaching the forecast area tomorrow, bringing precipitation chances late tomorrow night into Saturday. Guidance continues to slow the weather system, and members are becoming more in agreement on the timing. Precipitation chances are limited to the Coastal Range, northern Sacramento Valley, Southern Cascades, and adjacent foothills as the southern edge of the low brushes through the forecast area. This system is looking a little more convective in nature, with a chance of isolated thunderstorms on Saturday. QPF amounts have increased slightly due to the convective nature of this system. Precipitation amounts of 0.1 to 0.6 inch are forecast, with the heaviest amounts expected in Shasta County.

Ensemble guidance has the upper low moving out of the forecast area by Sunday as another longwave trough approaches the West Coast, bringing dry weather to interior Northern California for Halloween. Temperatures will cool to around 5 to 10 degrees below normal Saturday and Sunday with Valley temperatures in the 60s and mountains and foothills in the 40s to low 60s. -HEC

EXTENDED DISCUSSION (Monday THROUGH Thursday). Unsettled weather is forecast to continue through the extended period as ensemble guidance shows longwave troughing continuing in the Eastern Pacific through next week. Guidance is in good agreement of a deeper wave brushing across northern California on Monday. IVT forecast indicates it will tap into some tropical moisture, bringing more widespread precipitation across the forecast area. However, the front is expected to weaken as it makes landfall as the main trough only brushes the forecast area, so QPF amounts will be more limited than if the trough fully hit the forecast area. Precipitation amounts in the Valley are only around 0.1 to 0.3 inch with 0.25 to 1 inch in the mountains and foothills, mainly north of Highway 50. This will be a warm system with snow levels above 7,500 to 8,000 feet.

Weak ridging takes over on Tuesday, then ensemble guidance indicates another upper trough approaching the coast Wednesday. Timing and strength is still uncertain at this point, but guidance brings in another round of precipitation in the Wednesday/Thursday timeframe with this system. Temperatures through the week will remain below normal with Valley in the 60s and 40s to 60s in the mountains and foothills. -HEC

AVIATION. VFR conditions next 24 hours expect local MVFR/IFR possible in BR/FG from KCIC southward between 06z-18z Friday. Surface winds remain under 12 knots.

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 33 mi47 min SE 4.1G5.1 67°F 1019.8 hPa
PCOC1 - 9415144 - Port Chicago, CA 41 mi47 min ENE 8G11 67°F 63°F1019.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 43 mi110 min E 11 70°F 1025 hPa59°F
MZXC1 - 9415102 - Martinez-Amorco CA 45 mi47 min NE 5.1G6 67°F 62°F1020.2 hPa
AAMC1 - 9414750 - Alameda, CA 55 mi53 min WNW 5.1G7 70°F 62°F1019.7 hPa

Wind History for Port Chicago, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stockton, Stockton Metropolitan Airport, CA3 mi40 minNNW 310.00 miFair69°F58°F68%1019.6 hPa

Link to 5 minute data for KSCK

Wind History from SCK (wind in knots)
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Last 24hrNW11NW14NW13NW9NW8NW7W4W4W5SW5W6W6W3000E30E4E4E5E30N3
1 day agoSW6W6W4NW5NW3N40N3NW5NW4N500SW40000000NW7NW8NW12
2 days agoW5W11W8W7W7W7W7W9W40W40SE3S4SE4S6SE40S4S3SW4NW330

Tide / Current Tables for Blackslough Landing, San Joaquin River, California
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Blackslough Landing
Click for Map
Thu -- 07:06 AM PDT     0.10 feet Low Tide
Thu -- 07:27 AM PDT     Sunrise
Thu -- 01:06 PM PDT     Last Quarter
Thu -- 01:57 PM PDT     2.65 feet High Tide
Thu -- 02:34 PM PDT     Moonset
Thu -- 06:10 PM PDT     Sunset
Thu -- 06:45 PM PDT     1.39 feet Low Tide
Thu -- 11:28 PM PDT     2.99 feet High 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
Thu -- 03:20 AM PDT     -0.54 knots Max Ebb
Thu -- 07:27 AM PDT     Sunrise
Thu -- 08:03 AM PDT     0.00 knots Slack
Thu -- 11:47 AM PDT     0.56 knots Max Flood
Thu -- 01:06 PM PDT     Last Quarter
Thu -- 02:33 PM PDT     Moonset
Thu -- 03:22 PM PDT     -0.00 knots Slack
Thu -- 05:30 PM PDT     -0.19 knots Max Ebb
Thu -- 06:10 PM PDT     Sunset
Thu -- 07:48 PM PDT     0.00 knots Slack
Thu -- 10:08 PM PDT     0.40 knots Max Flood
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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