Wednesday, December11, 2019
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Marine Weather and Tides
Pittsburg, 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

Sunrise 7:11AMSunset 4:49PM Tuesday December 10, 2019 9:56 PM PST (05:56 UTC) Moonrise 4:01PMMoonset 5:32AM Illumination 100% Phase: Full Moon; Moon at 14 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- 846 Pm Pst Tue Dec 10 2019
Tonight..SE winds up to 10 kt. Rain this evening, then a chance of showers after midnight.
Wed..SE winds up to 10 kt. A slight chance of showers.
Wed night..S winds up to 10 kt. A slight chance of rain.
Thu..S winds 5 to 10 kt. A slight chance of rain.
Thu night..SW winds up to 10 kt. A slight chance of rain.
Fri..N winds around 5 kt.
Fri night..W winds around 5 kt.
Sat..W winds up to 10 kt. A chance of rain.
Sun..N winds up to 10 kt.
PZZ500 846 Pm Pst Tue Dec 10 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak frontal system will bring light to moderate rain to the northern waters tonight. Light to moderate southerly winds will then continue through much of the week as a series of frontal systems pass north of the area. Winds shifting to the northwest towards the weekend. A moderate northwest swell will persist before a longer period northwest swell arrives on Thursday. Wave heights will gradually build heading into the coming weekend creating hazardous seas conditions, particularly for smaller vessels.


7 Day Forecast for Marine Location Near Pittsburg, CA
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location: 38.05, -121.87     debug


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.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 1 mi56 min SE 6 G 8 52°F 1023.7 hPa (+1.0)
PCOC1 - 9415144 - Port Chicago, CA 9 mi56 min E 4.1 G 4.1 51°F 53°F1023.6 hPa (+1.0)
SFXC1 - San Francisco Bay Reserve, CA 13 mi71 min E 6 51°F 1023 hPa51°F
UPBC1 13 mi56 min E 4.1 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 14 mi56 min ENE 1 G 1.9 52°F 54°F1023.8 hPa (+0.6)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 21 mi56 min SE 8 G 9.9 53°F 1023 hPa (+0.0)
LNDC1 28 mi56 min ESE 7 G 8.9 54°F 1023.2 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi56 min SE 5.1 G 9.9 54°F 1023.8 hPa (+0.3)
OBXC1 30 mi56 min 53°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 30 mi56 min SE 5.1 G 6 53°F 1023.5 hPa (-0.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 30 mi56 min SE 4.1 G 6
AAMC1 - 9414750 - Alameda, CA 30 mi56 min ESE 4.1 G 5.1 53°F 55°F1023.6 hPa (+0.0)
RCMC1 - 9414863 - Richmond, CA 30 mi56 min SSE 5.1 G 6 53°F 55°F1023 hPa (-0.3)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 32 mi63 min Calm 52°F 1024 hPa (-0.0)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 33 mi56 min ESE 6 G 8 52°F 1022.1 hPa (-0.3)
PXSC1 33 mi56 min 54°F 54°F
FTPC1 - 9414290 - San Francisco, CA 36 mi56 min Calm G 1 53°F 54°F1023.6 hPa (-0.4)
RTYC1 - 9414523 - Redwood City, CA 42 mi56 min NE 5.1 G 7 54°F 57°F1024 hPa (+0.7)
46237 - San Francisco Bar, CA (142) 44 mi56 min 54°F3 ft

Wind History for Port Chicago, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA11 mi63 minSSW 34.00 miLight Rain Fog/Mist54°F50°F87%1022.4 hPa
Fairfield / Travis Air Force Base, CA16 mi3 hrsN 010.00 miOvercast52°F48°F87%1024.7 hPa
Vacaville Nut Tree Airport, CA23 mi63 minENE 44.00 miFog/Mist51°F48°F92%1023.9 hPa
Napa, Napa County Airport, CA24 mi62 minVar 56.00 miFog/Mist52°F50°F93%1022.6 hPa
Livermore, Livermore Municipal Airport, CA24 mi63 minSE 32.50 miLight Rain Fog/Mist52°F48°F89%1023.4 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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Last 24hrCalmW5W3CalmCalmCalmCalmCalmCalmCalmNW3CalmE3NE5NE3NE5N3NE5E6E6N4N5CalmSW3
1 day agoCalmS3SE3SE3SE3S3SE3CalmSE4CalmCalmSW3CalmCalmSW5CalmNW8NW7NW8CalmW4W6W5W4
2 days agoS7SE7S6S9S7CalmSE3CalmE4S6SE3CalmS7SW6NW94CalmNW4CalmNW5CalmNW4E3N3

Tide / Current Tables for Pittsburg, New York Slough, Suisun Bay, California
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Pittsburg
Click for Map
Wed -- 02:57 AM PST     3.07 feet High Tide
Wed -- 06:35 AM PST     Moonset
Wed -- 07:13 AM PST     Sunrise
Wed -- 07:48 AM PST     1.57 feet Low Tide
Wed -- 01:25 PM PST     4.48 feet High Tide
Wed -- 04:42 PM PST     Moonrise
Wed -- 04:47 PM PST     Sunset
Wed -- 09:14 PM PST     Full Moon
Wed -- 09:31 PM PST     -0.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.62.42.93.12.92.421.71.61.82.43.344.44.443.32.31.40.70.1-0.2-0.20.2

Tide / Current Tables for Chain Island .7 mi SW, Sacramento River, California Current
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Chain Island .7 mi SW
Click for Map
Wed -- 01:59 AM PST     1.00 knots Max Flood
Wed -- 05:13 AM PST     -0.00 knots Slack
Wed -- 06:35 AM PST     Moonset
Wed -- 07:07 AM PST     -0.52 knots Max Ebb
Wed -- 07:13 AM PST     Sunrise
Wed -- 09:13 AM PST     0.00 knots Slack
Wed -- 12:20 PM PST     1.43 knots Max Flood
Wed -- 03:31 PM PST     -0.00 knots Slack
Wed -- 04:42 PM PST     Moonrise
Wed -- 04:47 PM PST     Sunset
Wed -- 06:58 PM PST     -1.90 knots Max Ebb
Wed -- 09:14 PM PST     Full Moon
Wed -- 11:26 PM PST     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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0.60.910.90.60.1-0.3-0.5-0.4-0.10.411.41.30.90.4-0.4-1.2-1.7-1.9-1.8-1.5-1-0.3

Weather Map
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wmap_P
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
Wind Forecast for Sacramento, CA (0,6,7,8)
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Ground Weather Radar Station Sacramento, CA
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