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Marine Weather and Tides
Hercules, CA

Version 3.4
NOTICE
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 6:32AMSunset 6:08PM Friday March 5, 2021 9:38 PM PST (05:38 UTC) Moonrise 12:41AMMoonset 10:41AM Illumination 50% Phase: Third Quarter Moon; Moon at 22 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- 908 Pm Pst Fri Mar 5 2021
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt, becoming W 10 to 20 kt with gusts up to 25 kt after midnight. Rain.
Sat..W winds 5 to 15 kt.
Sat night..NW winds 10 to 20 kt with gusts up to 25 kt.
Sun..W winds 5 to 15 kt.
Sun night..W winds 5 to 15 kt.
Mon..SW winds 10 to 20 kt with gusts up to 25 kt. A chance of rain.
Mon night..SW winds 5 to 10 kt. Rain likely.
Tue..S winds up to 10 kt. Rain likely.
Wed..NW winds 5 to 10 kt. A chance of rain.
PZZ500 908 Pm Pst Fri Mar 5 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A cold front with gusty winds and rain will move southeastward over the coastal waters and bays tonight and Saturday morning. A moderate northwest swell will subside through Sunday then increase early to mid next week. A low pressure system approaches from the northwest with rain early to mid next week.


7 Day Forecast for Marine Location Near Hercules, CA
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location: 38.02, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 060505 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 905 PM PST Fri Mar 5 2021

SYNOPSIS. Have observed rain bands gradually move into coastal Sonoma County this evening. Rain is still looking to move across the area later tonight. Rain totals do not look impressive, as the system will move over the area too fast for much to accumulate. Temperatures will remain cool this weekend and onshore winds breezy Saturday, becoming light Sunday. More chances for rain remaining in the forecast for early next week, keeping temperatures cooler than normal. Warming trend possible next Friday.

DISCUSSION. as of 09:06 PM PST Friday . KMUX picking up on rain bands beginning their approach into coastal Sonoma and Marin counties this evening as the cold front inches closer to the CWA. Preliminary 3-hour precip totals have come in ranging anywhere from trace amounts to five hundredths of an inch at some of the highest peaks in extreme NW Sonoma County. Farther south have observed an increase in moisture levels at the low to mid levels as evidenced by the afternoon OAK sounding, which resulted in a gradual buildup of low/mid level CU's that gradually became more widespread across the Santa Cruz Mountains and other coastal ranges. All in all, the environment is conducive for the rain showers that will eventually move across the full length of the Bay Area and portions of the Central Coast tonight and into early tomorrow morning.

Are still on track for Fri Night-Sat Morn totals from morning forecast package, with totals between 0.1-0.25 inches in the City and slightly higher totals between 0.25-0.5 inches over much of the SF Peninsula. Across the Bay will see totals between 0.1-0.25 inches, with the South Bay also progged for similar totals. The highest totals will of course be in the North Bay where the culmination of the early onslaught from the rain bands and some lingering showers, coupled with orographic lift, will result in the highest coastal peaks in the North Bay getting as high as 0.75 inches overnight, while the foothills and valleys will get between 0.25-0.50 inches. Orographic lift will also aid in producing higher totals in the Santa Cruz Mountains, but only expecting up to 0.25 inches there while coastal Santa Cruz will come out of this overnight event with totals similar to the South Bay. Rain bands will not survive for long once they exit the favorable environment as they track south into Monterey Bay. Are expecting them to mostly fall apart so only expecting trace amounts at most from the Monterey Peninsula to San Benito County.The exception will be the Big Sur Coast where orography will once again aid in creating a more favorable environment for some showers to redevelop; are only forecasting up to 0.25 inches there. Nonetheless, concerns still permeate across the area owing to the damage caused to Highway One during the January AR, so will keep an eye on rain rates. The good news is that this system has not shown high rainfall rates over NorCal earlier this afternoon and given current precip water values are not progging heavy rainfall with this system. May still seem some moderate bands overnight, particularly in some of the urban areas in the SF Bay. Be sure to practice safe driving while driving in the rain.

Skies will briefly clear this weekend across the CWA as the drier air mass behind the frontal boundary settles into Northern and Central California through Sunday night. As such, max temps will be a couple of degrees cooler than what has been observed over the last few days along the Coast and several degrees cooler in the interior through Saturday and Sunday, with most of the CWA only getting up into the upper 50s to low 60s F.

This break in the wet pattern will be short-lived as another upper- level trough descends into the 140W void starting around Monday. EC, GFS, and C clusters are all showing high confidence in the amplitude of this system and it taking aim at Northern and Central California. This is in stark contrast to the pattern that we observed during nearly all of last month where the upper-level ridge did not let up in the slightest. Zonal flow across the PAC and the retrogression of the upper-level ridge will greatly aid in providing a favorable environment that is conducive for rain showers to scatter into our CWA as early as Monday evening. The proximity of the vort max of this upcoming low to subtropical moisture, coupled with the previously mentioned zonal flow across the ocean, will allow for a stream of moisture returns through Tuesday and all the way out into Thursday. As such, are looking at strong confidence that we will see some more noteworthy rainfall totals between Monday through Thursday of next week. Are looking at the potential for 1.5 inch totals along he coastal ranges while the interior valleys and hills are looking to range between 0.25- 0.50 inches, with some of the highest interior totals getting up to 0.75 inches. T

Two things to note about these totals: 1)they are subject to change and more fine tuning between now and this upcoming event given we are still a couple of days out and 2) these are totals over several days. Given the slow nature of these streaming moisture returns and the low IVT values on the most recent deterministic model runs, looking like this setup will make for low to moderate rainfall rates (at most) across much of the CWA (this is good news for burn scars as lower rainfall rates keep debris flow concerns down). The outlook for the end of this event is in concert with the longer-range outlook, which is hinting at the upper-level ridge quickly building back into its original domain by Friday and into the upcoming weekend. Ensemble members pick up on its return which makes sense as some of the EC weeklies were also hinting earlier this week at the zonal PAC flow through the middle of March. For now, will take what we can get.

AVIATION. as of 7:24 PM PST Friday . For the 00Z TAFs. It's VFR-MVFR though a cold front will bring lower cigs and rain tonight and Saturday morning. Winds gusty ahead of the front and with the frontal passage. Showers quickly ending behind the front. A few low ceilings lingering early Saturday then transitioning to VFR with clearing Saturday. Vicinity of KSFO . VFR to MVFR tonight and Saturday morning. Gusty southwesterly winds prior to frontal boundary passage Rain starting mid to late evening tapering off to showers Saturday morning. Ceiling lifting to VFR mid-morning Saturday.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR to MVFR tonight and Saturday morning. Southerly winds prior to frontal boundary passage late tonight and Saturday morning. Light rain to showers accompanying the front. A few showers may linger early Saturday, but clearing Saturday.

MARINE. as of 09:03 PM PST Friday . Locally gusty southerly winds will continue as a cold front inches closer to the coast early tonight. The cold front will then move through the coastal waters tonight and early Saturday resulting in gusty winds and periods of rain. A longer period moderate northwest swell will also continue to result in hazardous conditions for small craft through Saturday before subsiding on Sunday. Another low pressure system approaching from the northwest will bring more rain and larger swell early to mid next week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pigeon Pt to Pt Pinos 0-10 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm



PUBLIC FORECAST: Diaz AVIATION: Canepa MARINE: MM

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 3 mi50 min S 12 G 16 58°F 1014.3 hPa
CQUC1 4 mi49 min 55°F
UPBC1 9 mi50 min SSW 8.9 G 19
RCMC1 - 9414863 - Richmond, CA 9 mi56 min S 11 G 18 56°F 54°F1014.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi50 min SE 14 G 21 58°F 1015 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 9 mi50 min S 8.9 G 15 58°F 55°F1015.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi57 min Calm 54°F 1015 hPa
PCOC1 - 9415144 - Port Chicago, CA 14 mi50 min SSW 9.9 G 14 58°F 56°F1015.4 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 15 mi50 min SSW 12 G 19 57°F 1014.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 15 mi50 min S 13 G 17
OBXC1 15 mi50 min 57°F 53°F
LNDC1 16 mi50 min SSE 11 G 13 57°F 1014.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 16 mi50 min SE 12 G 16 57°F 1013.6 hPa
PXSC1 16 mi50 min 58°F 53°F
FTPC1 - 9414290 - San Francisco, CA 17 mi50 min SSW 6 G 9.9 56°F 54°F1014.7 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi50 min S 14 G 18 57°F 57°F1015.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 19 mi53 min WSW 11 56°F 1016 hPa48°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 21 mi50 min WSW 8.9 G 15 58°F 1015.2 hPa
46237 - San Francisco Bar, CA (142) 24 mi38 min 51°F10 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi28 min SSE 18 G 23 51°F1014.9 hPa
PRYC1 - 9415020 - Point Reyes, CA 36 mi50 min 53°F1014.2 hPa
RTYC1 - 9414523 - Redwood City, CA 36 mi50 min S 9.9 G 13 58°F 60°F1017.1 hPa
BDXC1 46 mi32 min 51°F

Wind History for Point Potrero Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Concord, Buchanan Field, CA13 mi45 minS 1010.00 miMostly Cloudy58°F47°F67%1014 hPa
Napa, Napa County Airport, CA13 mi44 minS 1110.00 miPartly Cloudy56°F50°F81%1013.5 hPa
Novato / Gnoss Field, CA16 mi43 minESE 6 G 1310.00 miOvercast55°F54°F94%1014.6 hPa
Oakland, Metro Oakland International Airport, CA22 mi45 minS 17 G 2210.00 miMostly Cloudy61°F51°F70%1015.5 hPa
Petaluma Municipal Airport, CA23 mi43 minVar 310.00 miOvercast55°F50°F82%1014.9 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmSE3CalmS3S3S3NW6N76W6SW11W14SW11W8SW5SW14S10
1 day agoS7SW7SW5SW9S6SW3CalmCalmCalm------3E3--NW8--NW12NW10W9W8SW7CalmCalm
2 days agoCalmCalmCalmCalmS4S4SE3CalmS4S3S4S3S6S7S6W9NW13W9SW10SW9S12S11--S11

Tide / Current Tables for Hercules, Refugio Landing, San Pablo Bay, California
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Hercules
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Sat -- 12:08 AM PST     2.81 feet Low Tide
Sat -- 01:50 AM PST     Moonrise
Sat -- 05:57 AM PST     6.58 feet High Tide
Sat -- 06:33 AM PST     Sunrise
Sat -- 11:29 AM PST     Moonset
Sat -- 01:47 PM PST     -0.01 feet Low Tide
Sat -- 06:07 PM PST     Sunset
Sat -- 08:41 PM PST     4.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.833.64.55.56.36.66.35.64.431.70.70.100.41.12.13.144.64.74.43.9

Tide / Current Tables for Davis Point, California Current
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Davis Point
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Sat -- 01:48 AM PST     0.00 knots Slack
Sat -- 01:51 AM PST     Moonrise
Sat -- 04:18 AM PST     1.67 knots Max Flood
Sat -- 06:33 AM PST     Sunrise
Sat -- 07:27 AM PST     -0.00 knots Slack
Sat -- 11:29 AM PST     Moonset
Sat -- 12:36 PM PST     -2.09 knots Max Ebb
Sat -- 04:00 PM PST     0.00 knots Slack
Sat -- 06:07 PM PST     Sunset
Sat -- 07:10 PM PST     0.85 knots Max Flood
Sat -- 10:16 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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-1-0.60.21.11.61.510.3-0.3-0.9-1.4-1.8-2-2.1-1.6-0.8-00.50.80.80.80.60.1-0.4

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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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