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Marine Weather and Tides Bethel Island, 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

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Sunrise 7:11AM

Sunset 4:48PM

Wednesday December 11, 2019 9:42 PM PST (05:42 UTC)

Moonrise 4:41PM

Moonset 6:33AM

Illumination 100%

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.

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7 Day Forecast for Marine Location Near Bethel Island, CA

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Area Discussion for - Sacramento, CA

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FXUS66 KSTO 112257 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 257 PM PST Wed Dec 11 2019

SYNOPSIS. Light rain at times through Thursday, heaviest in the mountains. Widespread precipitation also expected later in the week and into the weekend. Drier weather Sunday and early next week.

DISCUSSION. Precip should increase over our forecast area tonight into Thu as a strong 150kt Pac jet south of the GOA (Gulf of AK) low reaches the coast and focuses a +3 PW anomaly into our CWA. The U.S. West Coast AR Tool shows that a "weak" AR (TPW/moisture plume) along 130W will make "landfall" during this time tonight and into Thu. Rising 5H heights will steer the storm track and main dynamics a little farther N and into the Pac NW. But the strong WAA tonite and Thu (over 5 deg C/12 hr in the 850-700 mbs layer) will interact with the moisture plume resulting in steady precip over Norcal, mainly over the Nrn mtns and areas N of I-80. One to two inches of precip is forecast over Shasta Co/Wrn Plumas Co during this time, with amounts tapering off rapidly Swd to the I-80 corridor. South of I-80/US-50, only a few hundredths are expected as the storm track shifts Nwd. Snow levels are relatively high due to the transport of subtropical moisture from Hawaii. The snow profilers indicate a snow level around 5500 ft at Shasta Dam, around 7500 ft at Oroville, and Colfax, and could rise some 500 to 1500 ft overnite due to the WAA.

The wet wx should continue on Fri as 5H heights begin to fall slowly as the GOA trof emerges from its source region. This will keep the TPW plume over our CWA through the day. Model freezing/snow level forecasts came in a little colder than previous runs and we began to lower them a little from earlier forecasts. Looks as if the snow level will drop below the passes along the I-80/US-50 corridor by Fri morning. There is likely to be enough QPF Fri and FRi nite (and maybe into Sat) to warrant a snow advisory as the snow levels drop below the Sierra passes. With the bulk of the precip falling over the Sierra, our total QPF thru 12z Sun is now falling in line within the body of the ECMWF ensembles box/whisker plots for BLU, as an example.

The precip should turn more showery on Sat as the colder/unstable air drops into Norcal as the upper low and trof move across the NErn Pac to the Pac NW/Nrn CA coast before winding down on Sun. Snow levels should drop to 3500 ft Nrn mtns to 4000 ft in the Sierra late Sat, but by then the precip will be diminishing. JHM

EXTENDED DISCUSSION (Sunday THROUGH Wednesday).

The weather system bringing multiple days of rain and snow to northern California will be moving out of the area by early Sunday morning. As troughing moves towards the southwest US, upper level ridging begins to build over the west coast. Dry weather and mostly clear skies are anticipated by mid-afternoon Sunday, with these conditions continuing through at least Monday. Tuesday onward, models have varying solutions for when another trough will impact the area bringing additional chances for precipitation. Went with ensemble guidance for this forecast bringing back wet weather to the area Tuesday, although confidence is still low at this time with the onset of any rain. Temperatures remain fairly steady Sunday into next week with Valley highs topping out in the mid-50s. Mountain locations will mainly see high temperatures in the 30s.

AVIATION.

Widespread MVFR/IFR conditions seen through around 20Z. Brief improvement may be seen before another storm brings -RA after 02Z. MVFR/IFR ceilings return by early morning to all sites. VCSH possible around 12Z at Sac terminals. Winds generally less than 12kts.

STO WATCHES/WARNINGS/ADVISORIES. None.

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA	13 mi	55 min	ESE 6 G 8	53°F			1022 hPa
PCOC1 - 9415144 - Port Chicago, CA	21 mi	55 min	E 2.9 G 4.1	53°F	54°F		1022 hPa
SFXC1 - San Francisco Bay Reserve, CA	24 mi	118 min	E 1.9	53°F			1023 hPa
UPBC1	26 mi	55 min	NE 6 G 8
MZXC1 - 9415102 - Martinez-Amorco CA	26 mi	55 min	NE 6 G 8	53°F	54°F		1022.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA	33 mi	55 min	E 9.9 G 12	54°F			1021.6 hPa
LNDC1	37 mi	55 min	SE 5.1 G 7	58°F			1021.6 hPa
AAMC1 - 9414750 - Alameda, CA	39 mi	55 min			55°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	39 mi	55 min	SE 5.1 G 7
OKXC1 - 9414776 - Oakland (Berth 34), CA	39 mi	55 min	SSE 4.1 G 6	57°F			1021.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA	39 mi	55 min	SSW 4.1 G 6	58°F			1022.2 hPa
OBXC1	40 mi	55 min		57°F				57°F
RCMC1 - 9414863 - Richmond, CA	41 mi	55 min			55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA	43 mi	55 min	SE 6 G 11	57°F			1020.8 hPa
PXSC1	43 mi	55 min		58°F				58°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA	44 mi	62 min	NW 1.9	55°F			1022 hPa
RTYC1 - 9414523 - Redwood City, CA	46 mi	55 min	Calm G 2.9	60°F	57°F		1022.3 hPa
FTPC1 - 9414290 - San Francisco, CA	46 mi	55 min	Calm G 0		55°F		1022 hPa

Wind History for Port Chicago, CA

(wind in knots)    EDIT      (on/off)   Help

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Concord, Buchanan Field, CA	22 mi	50 min	WSW 3	4.00 mi	Fog/Mist	55°F	51°F	87%	1020.8 hPa
Stockton, Stockton Metropolitan Airport, CA	22 mi	48 min	ESE 8	5.00 mi	Fog/Mist	54°F	50°F	87%	1022.3 hPa
Livermore, Livermore Municipal Airport, CA	23 mi	50 min	SE 3	6.00 mi	Fog/Mist	55°F	52°F	90%	1021.9 hPa
Fairfield / Travis Air Force Base, CA	24 mi	1.7 hrs	ESE 4	7.00 mi	Light Rain	53°F	51°F	94%	1023.4 hPa

Link to 5 minute data for KSCK

Wind History from SCK (wind in knots)

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Tide / Current Tables for Irish Landing, Sand Mound Slough, San Joaquin River, California

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Tide / Current Tables for West Island Lt .5 mi SE, San Joaquin River, California Current

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Weather Map

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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

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Wind Forecast for Sacramento, CA (0,6,7,8)

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Ground Weather Radar Station Sacramento, CA

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