Monday, April6, 2020
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Marine Weather and Tides
Richmond, CA

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
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.

Sunrise 6:45AMSunset 7:37PM Sunday April 5, 2020 9:03 PM PDT (04:03 UTC) Moonrise 3:59PMMoonset 4:42AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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- 234 Pm Pdt Sun Apr 5 2020
Rest of today..W winds 5 to 15 kt. A chance of showers and a slight chance of Thunderstorms.
Tonight..W winds up to 10 kt. A chance of showers.
Mon..N winds up to 10 kt. Showers likely.
Mon night..E winds 10 to 20 kt with gusts up to 25 kt. A slight chance of showers.
Tue..N winds up to 10 kt. A slight chance of showers.
Tue night..W winds 5 to 15 kt.
Wed..SW winds up to 10 kt.
Thu..SW winds 5 to 10 kt. Winds and wind waves higher in and near Thunderstorms.
PZZ500 234 Pm Pdt Sun Apr 5 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to heavy showers will persist the rest of today along with a slight chance of Thunderstorms, mainly over the southern waters. This will also result in locally breezy west to southwest winds across portions of the coastal waters into this evening before winds diminish tonight. The upper low will slowly exit the area into Tuesday before high pressure rebuilds over the eastern pacific mid to late next week. A prevailing moderate west to northwest swell will persist through much of the forecast period.


7 Day Forecast for Marine Location Near Richmond, CA
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location: 37.91, -122.38     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 060009 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 509 PM PDT Sun Apr 5 2020

SYNOPSIS. Widespread rain is forecast for today as a stronger system drops down the coast. Locally heavy rain, possible thunderstorms, and gusty winds can be expected with this system. Rain will turn to showers tonight into Monday as an upper low moves south offshore. Showers may linger across the Central Coast into Tuesday, and possibly Wednesday, as the upper low slowly exits the region. A warming and drying trend is forecast for the second half of the week.

DISCUSSION. as of 01:40 PM PDT Sunday . A late season storm system sweeping through the Bay Area continues to bring active weather this afternoon. Latest surface analysis shows a low pressure system spinning off the NorCal Coast. A second low is moving through S Oregon. A cold front associated with the second low is currently bisecting the forecast area this afternoon. KMUX radar imagery shows light to moderate shower activity along and south of the front (mainly south and east of the Golden Gate). Radar imagery also shows some embedded showers that are likely producing locally brief heavy rain. The atmosphere remains unstable as evident from thunderstorms developing near the East Delta and Sacramento Valley. No actual lightning strikes have been detect in the WFO Monterey forecast area. Winds still remain breezy to gusty, but have subside near the coast and lower elevations. Therefore the Wind Advisory for Monterey Peninsula/Big Sur has been canceled.

For the rest of the day, the cold front will continue to move south and east. Rain will continue along and south of the front and transition to more scattered showers behind the front. Have kept a chance for thunderstorms in the forecast, but cut back on coverage. Best chance for thunder is now south and east of SF Bay. Have also cut back on precip chances across the North Bay this evening.

By tonight the bulk of the frontal rain will be south and east of the Bay Area with lingering shower activity behind it. Next item of concern will be the low pressure moving down the coast. As this happens model guidance suggest a split in the low with one piece pivoting toward the Bay Area Monday morning and a second piece much farther offshore. The piece pivoting toward the Bay Area has a good shot at bringing another band of moderate to locally heavy rain on Monday. This low is also cold aloft with the 540 DAM thickness south of the region. The cold air will lead to more instability and another chance for thunderstorms on Monday. Best chance for thunder will be southern areas near the cold pool aloft. Additionally, accumulating higher elevation snow is possible over the East Bay, Big Sur Coast and Southern Gabilan Range. Not bad for early April. Would not be surprised at all if a quick 6" fell above 4500 feet. As always for this scenario is the timing of cold air/precip. Showers will linger through Monday night as well. And finally, a few more wrap around showers will be possible on Tuesday, but mainly for Monterey/San Benito.

A warming and drying trend is expected by Wednesday continuing through the rest of the week.

AVIATION. as of 5:00 PM PDT Sunday . Strong winds have not materialized and thunderstorms have been confined to the central Valley. These elements have been removed from the tafs.

Most of the rain is from KSJC south. Abundant moisture at the lower levels will keep borderline MVFR/VFR cigs over the entire area through tonight with patchy fog in the North Bay late tonight. Upper level low will drop south along the central coast. Winds will become more southerly after midnight but remain 10 kt or less. A band of showers from the low is expected to come onshore in the MRY Bay Area after 12Z spreading into the Santa Clara Valley after 16Z and the rest of the Bay Area after 21Z.

Vicinity of KSFO . MVFR cigs at times with bases around 3000 ft. West to southwest winds to 10 kt becoming southeast Monday morning. Showers expected to return after 20Z as winds switch back to westerly.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Light to moderate rain through early evening. MVFR cigs becoming more widespread tonight as the low levels are very moist. A short lull in the rain tonight before the next band of showers arrives after 12Z and persists through the afternoon.

MARINE. as of 04:53 PM PDT Sunday . Moderate to heavy showers will persist the rest of today along with a slight chance of thunderstorms, mainly over the southern waters. This will also result in locally breezy west to southwest winds across portions of the coastal waters into this evening before winds diminish tonight. The upper low will slowly exit the area into Tuesday before high pressure rebuilds over the eastern Pacific mid to late next week. A prevailing moderate west to northwest swell will persist through much of the forecast period.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Mry Bay until 5 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 5 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 9 PM



PUBLIC FORECAST: MM AVIATION: W Pi MARINE: AS

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PPXC1 - 9414847 - Richmond (Point Potrero), CA 1 mi45 min W 8.9 G 9.9 53°F 1005.9 hPa
RCMC1 - 9414863 - Richmond, CA 2 mi45 min W 5.1 G 7 52°F 57°F1005.3 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 4 mi41 min Calm 50°F 1006 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 7 mi45 min WNW 7 G 11 51°F 1005.7 hPa
PXSC1 7 mi45 min 52°F 43°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 8 mi51 min NW 7 G 8.9
OBXC1 8 mi45 min 52°F 42°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi45 min W 5.1 G 8.9 51°F 1004.7 hPa
FTPC1 - 9414290 - San Francisco, CA 9 mi45 min 59°F
AAMC1 - 9414750 - Alameda, CA 10 mi45 min WNW 6 G 8 52°F 58°F1005.7 hPa
LNDC1 10 mi45 min WNW 5.1 G 8 52°F 1005.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 12 mi45 min NW 12 G 16 53°F 1005.1 hPa
UPBC1 16 mi45 min WNW 8 G 12
46237 - San Francisco Bar, CA (142) 16 mi33 min 55°F5 ft
MZXC1 - 9415102 - Martinez-Amorco CA 16 mi45 min WNW 8 G 12 52°F 58°F1005.5 hPa
PCOC1 - 9415144 - Port Chicago, CA 21 mi45 min SW 6 G 7 51°F 58°F1005.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 27 mi23 min NNW 7.8 G 9.7 51°F 53°F1006.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 27 mi78 min W 5.1
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi45 min W 2.9 G 5.1
RTYC1 - 9414523 - Redwood City, CA 29 mi45 min WSW 5.1 G 7 60°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 47 mi23 min NW 5.8 G 7.8 52°F 53°F1006.2 hPa41°F

Wind History for Point Potrero Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA17 mi70 minW 810.00 miMostly Cloudy54°F41°F62%1005.4 hPa
Concord, Buchanan Field, CA18 mi70 minSSW 610.00 miFair52°F39°F64%1003.9 hPa
Novato / Gnoss Field, CA19 mi68 minVar 510.00 miFair50°F39°F67%1005.8 hPa
San Francisco, San Francisco International Airport, CA20 mi67 minW 710.00 miMostly Cloudy53°F39°F59%1005.3 hPa
Napa, Napa County Airport, CA21 mi69 minWNW 910.00 miFair50°F39°F66%1004.4 hPa
Hayward, Hayward Air Terminal, CA22 mi69 minWNW 410.00 miOvercast51°F42°F71%1006.3 hPa

Link to 5 minute data for KOAK

Wind History from OAK (wind in knots)
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1 day agoW12W9NW5W14W14W12W15W12W10W10SW10S12SE13S16S15S16SW17SW18S18SW14SW11W10W11SW11
2 days agoNW6W5W6CalmNE4CalmCalmCalmNE3N4CalmCalmSW3W7W6SW7W7W14W15W14W14W15W14W14

Tide / Current Tables for Richmond Inner Harbor, San Francisco Bay, California
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Richmond Inner Harbor
Click for Map
Mon -- 05:18 AM PDT     0.97 feet Low Tide
Mon -- 06:17 AM PDT     Moonset
Mon -- 06:46 AM PDT     Sunrise
Mon -- 11:22 AM PDT     6.02 feet High Tide
Mon -- 05:38 PM PDT     -0.23 feet Low Tide
Mon -- 06:13 PM PDT     Moonrise
Mon -- 07:37 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.653.92.61.511.11.934.35.465.95.13.72.10.7-0.1-0.20.41.634.45.5

Tide / Current Tables for Point Richmond .5 mi W, San Francisco Bay, California Current
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Point Richmond .5 mi W
Click for Map
Mon -- 01:01 AM PDT     -0.00 knots Slack
Mon -- 03:28 AM PDT     -1.20 knots Max Ebb
Mon -- 06:17 AM PDT     Moonset
Mon -- 06:30 AM PDT     0.00 knots Slack
Mon -- 06:46 AM PDT     Sunrise
Mon -- 09:58 AM PDT     1.18 knots Max Flood
Mon -- 01:02 PM PDT     -0.01 knots Slack
Mon -- 03:45 PM PDT     -1.48 knots Max Ebb
Mon -- 06:13 PM PDT     Moonrise
Mon -- 06:57 PM PDT     0.01 knots Slack
Mon -- 07:37 PM PDT     Sunset
Mon -- 10:28 PM PDT     1.31 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70-0.7-1.2-1.1-0.8-0.30.30.71.11.210.60-0.8-1.3-1.5-1.2-0.700.611.31.3

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 San Francisco/Monterey Bay Area, CA (0,6,7,8)
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Ground Weather Radar Station Sacramento, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.