Sunday, July25, 2021
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Marine Weather and Tides
Plymouth, 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 5:58AMSunset 8:22PM Sunday July 25, 2021 9:50 AM PDT (16:50 UTC) Moonrise 8:59PMMoonset 6:33AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 842 Am Pdt Sun Jul 25 2021
.small craft advisory in effect from 3 pm pdt this afternoon through this evening...
Today..SW winds 15 to 20 kt, becoming 10 to 20 kt this afternoon. Gusts up to 30 kt.
Tonight..SW winds 15 to 20 kt with gusts up to 35 kt.
Mon..SW winds 15 to 20 kt with gusts up to 30 kt.
Mon night..SW winds 15 to 20 kt with gusts up to 30 kt. A slight chance of showers and Thunderstorms.
Tue..SW winds 10 to 15 kt. A slight chance of showers and Thunderstorms.
Tue night..SW winds 10 to 15 kt.
Wed..SW winds 10 to 15 kt.
Thu..SW winds 10 to 15 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 842 Am Pdt Sun Jul 25 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to locally moderate west to northwest winds will prevail across the waters through mid-week. Locally breezy winds will persist over the far northern outer waters through Monday morning. Additionally, gusty afternoon and evening winds will funnel through the golden gate gap into the san francisco bay. Monsoonal moisture will advect northward into the waters Monday into Tuesday bringing a slight chance of high based Thunderstorms to the area. Steep northwest waves continue to dominate the sea state at 7 to 9 seconds along with a light southerly swell.


7 Day Forecast for Marine Location Near Plymouth, CA
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location: 38.48, -120.84     debug


Area Discussion for - Sacramento, CA
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FXUS66 KSTO 250934 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 234 AM PDT Sun Jul 25 2021

SYNOPSIS. Mostly dry weather with warm temperatures today. Chances for mountain thunderstorms each day today through this week with more widespread thunderstorm chances Monday and Tuesday. Cooler temperatures early this week before warming again midweek.

DISCUSSION. High pressure centered over the Desert Southwest remains stretched over CA today. Models do show a tightening of the pressure gradient over the Delta region today which corresponds with the increase in onshore flow and the Delta breeze today. Therefore, temperatures will begin cooling a few degrees from yesterday for areas that were not impacted by smoke. Smoke forecast in the northern portion of the CWA remains difficult. Light winds early in the day could allow smoke to move into the Valley once again, but with the onshore flow slightly stronger than yesterday, the smoke theoretically should not be quite as thick and should move out faster than yesterday. Monsoon moisture begins pushing into northern CA today, bringing a chance of thunderstorms this afternoon and evening to the Sierra south of Highway 50.

Ensembles indicate a weak trough will set up over the Eastern Pacific beginning Monday, which pushes the western edge of the monsoon high east to set up over CA. Better chances for thunderstorms are Monday and Tuesday as a shortwave moves through CA, bringing the main push of monsoon moisture through the area. Uncertainty still remains in the extent of thunderstorm coverage, but best chances remain over the mountains and foothills. Timing wise, convection potential begins Monday afternoon over the Sierra and possibly to the west of our forecast area. Convective potential spreads north into the Coastal Range and Shasta County overnight into Tuesday morning. There is increasing chance in showers and thunderstorms in the northern Sacramento Valley Tuesday. Will need to keep an eye on elevated instability for chances further south, but right now it seems meager. PWAT values remain high, so thunderstorms would produce rain, especially over the higher elevations. Some heavier rain showers are possible along with gusty wind and lightning. The wave is slated to move out by Tuesday night with another weaker wave moving along the flow Wednesday. Thunderstorm chances Wednesday are limited to the Sierra.

Temperatures are forecast to cool to near or slightly below normal by Monday. Significant cooling is forecast on Tuesday in the northern Sacramento Valley due to cloud cover. Valley temperatures Tuesday will range from the upper 80s in the north to mid 90s in the south. Temperatures will rebound Wednesday as onshore flow cuts off and cloud cover dissipates. -HEC

EXTENDED DISCUSSION (Thursday THROUGH Sunday). NorCal will remain on the periphery of the large high centered over the central US during the latter half of the week. Hot and dry conditions expected except for daily diurnal thunderstorms possible over the northern Sierra, mainly to the south of Interstate 80. Temperatures will likely be a little above average.

AVIATION. VFR conditions for most locations the next 24 hours. Local MVFR in wildfire smoke possible for the northern Sacramento Valley, mainly before 00Z Monday. Local southwesterly surface wind gusts 25-35 kts vicinity west Delta.

STO WATCHES/WARNINGS/ADVISORIES. None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 66 mi66 min W 13 62°F 1014 hPa54°F
PCOC1 - 9415144 - Port Chicago, CA 70 mi57 min W 21 G 26 59°F 68°F1014.1 hPa
AAMC1 - 9414750 - Alameda, CA 92 mi57 min W 4.1 G 7 58°F 69°F1015.8 hPa

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sacramento Mather Airport, CA25 mi66 minSSE 710.00 miA Few Clouds68°F50°F53%1012.5 hPa

Link to 5 minute data for KMHR

Wind History from MHR (wind in knots)
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----W5--SW6--S10--S5--------------SE6SE5SE5SE7S7
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S6S4SE6------CalmS3E4--S3Calm

Tide / Current Tables for Sacramento #4, Sacramento River, California
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Sacramento #4
Click for Map
Sun -- 03:44 AM PDT     0.88 feet Low Tide
Sun -- 06:02 AM PDT     Sunrise
Sun -- 07:35 AM PDT     Moonset
Sun -- 07:51 AM PDT     3.42 feet High Tide
Sun -- 05:04 PM PDT     -0.23 feet Low Tide
Sun -- 08:22 PM PDT     Sunset
Sun -- 10:01 PM PDT     2.71 feet High Tide
Sun -- 10:01 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.91.51.20.90.91.42.43.23.43.32.92.41.91.30.70.3-0.1-0.200.81.72.42.72.6

Tide / Current Tables for Clarksburg #4, Sacramento River, California
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Clarksburg #4
Click for Map
Sun -- 02:14 AM PDT     0.88 feet Low Tide
Sun -- 06:02 AM PDT     Sunrise
Sun -- 06:42 AM PDT     3.42 feet High Tide
Sun -- 07:35 AM PDT     Moonset
Sun -- 03:34 PM PDT     -0.23 feet Low Tide
Sun -- 08:22 PM PDT     Sunset
Sun -- 08:52 PM PDT     2.71 feet High Tide
Sun -- 10:01 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.10.911.72.63.33.43.22.82.31.71.10.50.1-0.2-0.20.31.11.92.52.72.52.2

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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