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Marine Weather and Tides Concord, 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 4:50PM

Tuesday December 10, 2019 3:40 PM PST (23:40 UTC)

Moonrise 4:02PM

Moonset 5:32AM

Illumination 99%

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 Concord, CA

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Area Discussion for - Sacramento, CA

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FXUS66 KSTO 102302 AFDSTO

Area Forecast Discussion National Weather Service Sacramento CA 302 PM PST Tue Dec 10 2019

SYNOPSIS. Rain returns to the region tonight tapering to a few light showers on Wednesday. Widespread precipitation expected later in the week and into the weekend. Drier weather Sunday and early next week.

DISCUSSION. After the morning fog in the Valley, much of the low cloud deck was slow to erode. Now the clouds associated and ahead of the frontal band along the coast are moving into our area and will spread over the Sierra early this evening. It has been a sunny, seasonably pleasant day in the Sierra as the higher elevations were above the fog and well to the east of the advancing cloud deck from the west for most of the day. But that will change this evening.

The frontal system will move into the region, spreading light rain over much of our CWA beginning late this afternoon and continuing into the evening. Radar echoes along the Nrn CA coast this morning are now moving onshore at press time, and the timing of the upper trof suggests the frontal precip should end by Wed morning as the trof moves through our region. Satellite trends suggest a brief period of clearing early Wed morning as the trof passes, followed by an increase in cloud cover during the day. Behind the trof, heights rebuild on Wed as a ridge axis slides across the region. Some light sprinkles or showers are still possible mainly in the Nrn part of our CWA on Wed, where WAA (about 7 deg C/12hr in the 850-700 mbs layer) could result in some light precip.

An increase in precip is forecast over Norcal Wed nite and 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 140W will make "landfall" during this time (late on 12/11 and into 12/12). Rising 5H heights will steer the storm track and main dynamics a little farther N and into the Pac NW. But the strong WAA Wed nite 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. An inch or so of precip is forecast over Shasta Co during this time, with amounts tapering off rapidly Swd to the I-80 corridor. South of I-80, only a few hundredths are expected as the storm track shifts Nwd.

Looks as if it will be a little wetter in our CWA on Fri from earlier forecasts 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. Comparing our QPF with the ECMWF ensembles we are generally a little low/light on the QPF and we made a last minute upward adjustment this afternoon . but still we may be a little too light. The bulk of the precip is still forecast over the Sierra.

Snow levels will be rising Wed nite and Thu to 8Kft or so limiting winter travel impacts, until they lower below the passes Fri nite. JHM

EXTENDED DISCUSSION (Saturday THROUGH Tuesday).

By Saturday morning expect ongoing precipitation mainly over the mountains and foothills, although a few lingering showers may be possible in the Valley. Snow levels will range from 4-5kft Saturday, although snowfall accumulations themselves will only be a few inches. Some minor mountain travel impacts are anticipated Saturday due to this lingering precipitation. Models have trended a bit later to bring dry weather back to the area, as a few light lingering snow showers will be possible through Sunday morning.

Upper level ridging builds into the area Sunday and Monday. Mostly clear skies and average temperatures are expected early next week. Ensemble guidance shows the potential for another system to impact NorCal Tuesday, although confidence with this system remains low at this time.

AVIATION.

Deteriorating conditions expected as a system moves across northern California tonight. Light rain is expected at RDD/RBL between 04-06Z, spreading south towards Sacramento terminals shortly after. MVFR/IFR conditions likely overnight at these sites, with possible LIFR conditions returning to southernmost terminals.

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
PCOC1 - 9415144 - Port Chicago, CA	4 mi	71 min			54°F
MZXC1 - 9415102 - Martinez-Amorco CA	7 mi	77 min	NE 7 G 8	54°F	55°F		1022.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA	7 mi	77 min	ESE 7 G 8.9	55°F			1023 hPa
UPBC1	7 mi	71 min	ENE 8.9 G 9.9
SFXC1 - San Francisco Bay Reserve, CA	14 mi	116 min	SE 5.1	54°F			1024 hPa	50°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA	15 mi	71 min	E 9.9 G 11	55°F			1022.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA	20 mi	71 min	W 4.1 G 5.1	57°F			1022.9 hPa
LNDC1	21 mi	77 min	WSW 1.9 G 2.9	57°F			1022.5 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA	22 mi	77 min	N 4.1 G 4.1	54°F			1022.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	22 mi	77 min	WSW 1 G 2.9
AAMC1 - 9414750 - Alameda, CA	22 mi	71 min			55°F
RCMC1 - 9414863 - Richmond, CA	22 mi	71 min			55°F
OBXC1	23 mi	71 min		56°F				52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA	25 mi	71 min	NNW 4.1 G 5.1	54°F			1021.7 hPa
PXSC1	25 mi	71 min		55°F				53°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA	25 mi	60 min	NNW 6	54°F			1023 hPa
FTPC1 - 9414290 - San Francisco, CA	28 mi	77 min	Calm G 1	55°F	55°F		1022.9 hPa
RTYC1 - 9414523 - Redwood City, CA	36 mi	77 min	N 5.1 G 8	57°F	57°F		1023.1 hPa
46237 - San Francisco Bar, CA (142)	37 mi	71 min			54°F	3 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA	48 mi	41 min	SE 7.8 G 9.7	55°F	56°F		1023 hPa (-1.7)

Wind History for Port Chicago, CA

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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	3 mi	48 min	ENE 5	10.00 mi	Overcast	58°F	46°F	65%	1021 hPa
Fairfield / Travis Air Force Base, CA	20 mi	1.7 hrs	E 5	10.00 mi	Overcast	54°F	52°F	94%	1024.4 hPa
Napa, Napa County Airport, CA	21 mi	47 min	E 8	10.00 mi	Mostly Cloudy	55°F	48°F	80%	1022 hPa
Livermore, Livermore Municipal Airport, CA	23 mi	48 min	ENE 6	7.00 mi	Fair	56°F	48°F	75%	1022.3 hPa
Hayward, Hayward Air Terminal, CA	24 mi	47 min	W 5	10.00 mi	Fair	58°F	46°F	67%	1023.1 hPa
Oakland, Metro Oakland International Airport, CA	24 mi	48 min	N 0	10.00 mi	Mostly Cloudy	58°F	46°F	67%	1022.5 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)

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Tide / Current Tables for Mallard Island Ferry Wharf, Suisun Bay, California

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Tide / Current Tables for Stake Point .9 Mi NNW, Suisun Bay, 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 (18,4,5,8)

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Ground Weather Radar Station Sacramento, CA

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