Monday, January25, 2021
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Marine Weather and Tides
Rollingwood, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 7:17AMSunset 5:26PM Monday January 25, 2021 11:17 AM PST (19:17 UTC) Moonrise 2:33PMMoonset 4:56AM Illumination 93% Phase: Waxing Gibbous; Moon at 12 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- 841 Am Pst Mon Jan 25 2021
.gale warning in effect through this evening...
Today..NW winds 15 to 25 kt with gusts up to 35 kt.
Tonight..NW winds 15 to 25 kt with gusts up to 35 kt.
Tue..SW winds 5 to 15 kt with gusts up to 25 kt. A chance of rain.
Tue night..S winds 25 to 35 kt with gusts up to 50 kt. Rain.
Wed..S winds 15 to 25 kt with gusts up to 35 kt. Rain.
Wed night..SE winds 15 to 25 kt with gusts up to 30 kt. Rain.
Thu..S winds 5 to 15 kt. Rain.
Fri..SW winds 5 to 10 kt. A chance of rain.
PZZ500 841 Am Pst Mon Jan 25 2021
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gale force winds out of the northwest continue across the waters today as an upper level trough strengthens over california. These strong winds are merging with a northwest swell creating a very steep sea of roughly 12 to 20 feet at 11 to 14 seconds. Rain showers will also continue today with a slight chance of Thunderstorms this morning. Winds will become southerly Tuesday ahead of an approaching atmospheric river. Storm force southerly winds are anticipated for coastal zones beginning Tuesday evening. Additionally, buoy 46013 (bodega bay buoy) has been reported to have gone adrift.


7 Day Forecast for Marine Location Near Rollingwood, CA
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location: 37.96, -122.33     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 251752 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 952 AM PST Mon Jan 25 2021

SYNOPSIS. A few scattered showers remain over the coastal waters and Monterey County, along with colder temperatures and lowering snow levels. Gusty northwest winds will continue through early this morning, especially near the coast. A much stronger and wetter system will then impact the region with heavy rain and strong winds from late Tuesday through Thursday evening. Additional rainfall is likely next weekend.

DISCUSSION. as of 09:09 AM PST Monday . It's a chilly start to the morning, especially in the interior North Bay and East Bay valleys where winds have diminished. Temperatures are generally in the 30s with a few of the coldest spots down into the upper 20s in the aforementioned areas. Meanwhile, onshore winds remain brisk and gusty along the coast with temperatures in the 40s. Rain showers also persist over the Pacific and along coastal Monterey County on the western periphery of the mid/upper level low just inland. This is also likely producing additional snow showers in the higher elevations of the Santa Lucia Range. Expect these showers to persist off and on throughout the day as well. The only change to the ongoing forecast this morning will be the potential need to extend the Wind Advisory currently in effect until 10 AM along west/northwest facing coastal areas. This may need to be extended into the early afternoon, an updated NPW product will be forthcoming to either allow the product to expire or extend the advisory. All this said, will be working to fine tune the details on the coming atmospheric river event from Tuesday into Thursday for the afternoon forecast package. For more on this, please see the previous forecast discussion below.

PREV DISCUSSION. as of 04:21 PM PST Monday . A cold front that brought widely scattered showers across the Bay Area and Central Coast on Sunday has exited the forecast area and is now over SoCal. In its wake, a cold unstable airmass is trailing in from the north. As a result scattered showers continue early Monday morning. Latest radar imagery shows most of the shower activity continues to be over the coastal waters and Monterey County. There are a few embedded showers that may drop small hail and brief heavy rain. Saw one isolated flash off the Santa Cruz Coast, but given the higher radar reflectivities hitting the -10 C mark aloft an additional strike or two are still possible. Per the latest hi- res short- term models these showers have the chance to linger well into the afternoon. In fact, the models even highlight the Monterey Bay moisture feed "effect" keeping showers tracking over the Santa Lucia Range. Given the colder airmass snow levels have dropped 2000-2500 feet. Therefore, snow is likely falling over the higher terrain, especially Monterey county. The Palo Escrito cam overnight does show snow, but how much is hard to tell. Up to 10 inches of snow will be possible over the Santa Lucia Range peaks. A few echoes did pass over the Santa Cruz Mts earlier so a dusting is possible there as well. It should also be noted that patchy black ice is possible over the higher terrain given the temps near freezing and lingering water from Sunday. Lastly, the post- frontal set up also resulted in some gusty winds. Winds are strongest over the higher terrain and immediate coastline. There is a Wind Advisory through 10 AM this morning to account for the gusty winds. Despite some afternoon sunshine possible today will be on the colder with highs in the 50s (30s in the mts). The NW wind will make it feel even colder.

Diminishing clouds and weakening winds will result in some very cold overnight lows tonight with frost and patchy black ice with any lingering water. Overnight lows will drop into the mid 20s to lower 30s inland and 30s to low 40s near the coast and Bay Shoreline.

If you live near a recent burn area from the 2020 fire season or know someone who does pay attention the forecast Tuesday through Thursday of this week. The first big storm of the winter season is still on track to bring heavy rain, gusty winds, and possible thunderstorms. Hazards currently in effect to account for the impactful storm -- Flash Flood Watch Tuesday afternoon through Thursday afternoon for all of the North Bay, Santa Cruz Mts, and Santa Lucia Mts. Of greatest concerns will be near burn areas with potential debris flows, but even outside of the burn areas localized flooding will be possible. A High Wind Watch has also been issued Tuesday evening through Thursday morning. Winds will be strongest along the coast and higher terrain.

Now for the details - the overall forecast has not changed too much from the previous one, just some fine tuning of the details. Satellite imagery shows the PWAT moisture plume nudging northward toward the Aleutians at this time. This moisture plume is still slated to traverse the ridge and accompany a cold front on Tuesday. Rain chances initially increase over the North Bay Tuesday afternoon and then quickly fills in from N to S as the frontal dynamics tap into the higher PWAT air. The front is forecast to push N to S Tuesday night/early Wednesday. Some of the hi-res models are depicting a pretty dynamic fropa that has some signatures of a NCFR (narrow cold frontal rainband). If this plays out rain rates will be rather high leading to flash flooding concerns and maybe even a thunderstorm. The front and associated moisture plume will then continue southward and possibly stall/hang up over Monterey county or northern SLO county briefly before nosing northward on Thursday. The question still remains how far north? For now, it appears to near Santa Cruz but the bulls-eye remains over the Big Sur Coast. Stalling/pivoting moisture plumes with AR events are always tricky and may not know more details until the event begins to unfold. Forecast rain totals from Tuesday through Thursday night range from 2.5-4.5 inches at most lower elevation locations, including urban areas. In the hills, rain totals 6 to 8 inches, except as much as 10 inches in the Santa Cruz Mountains and as much as 13 inches in the Santa Lucia Mountains. Locally higher amounts are certainly possible in areas of orographic enhancement, especially on southwest-facing slopes in the coastal ranges like Big Sur. Finally for precip, WPC has issued a marginal threat for flooding Tuesday AM to Wednesday AM and slgt threat for flooding Wednesday AM through Thursday AM.

The higher resolution models are now in the timeframe to highlight very gusty southerly winds Tuesday evening through Thursday morning. Southerly winds will really crank up over the waters and coast Tuesday evening and remain gusty/strong through early Thursday. The ECMWF Extreme Forecast Index and other ensembles show well above climo for wind potential. Gusts in the 60-70 mph are definitely possible over the higher terrain and immediate coastline. A High Wind Watch in effect and may need to be converted to a mix of Wind Advisory/High Wind Warning. Downed trees and downed powerlines biggest threat.

The AR is forecast to finally move south/inland on Friday with a few lingering showers. Another round of rainfall will be possible Friday night with another front. The longer range pattern looks active.

AVIATION. as of 9:55 AM PST Monday . For the 18Z TAFs. Satellite imagery depicts a post frontal environment with convective showers off and along the coast and gusty northwest winds along the coast, through coastal gaps, and higher terrain. As such, expect to see continued gusts 25-35kt across some of the TAF sites and local VCSH near KMRY (to south/southwest/west). Winds will ease into this evening and become predominately light overnight. Localized BCFG/FG possible in the North Bay valleys. Temperatures will drop into the upper 20s near sunrise, so FZFG is also a possibility at KSTS. An atmospheric river will begin to move into the region at the end of the TAF package and result in mod to heavy rain and gusty southerly winds thru midweek.

Vicinity of KSFO . VFR. Sustained winds 15-22 kt with gusts 25 to 35 kt, weakening after sunset. Winds will back towards the south through tomorrow morning ahead of the arrival of an atmospheric river. Gusty southerly winds will arrive after 03Z WED (beyond end of current TAF package) with periods of mod to heavy rain.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . MVFR to VFR. Gusty WNW winds through the day will gradually taper off this evening and overnight. Trailing showers along coast and over nearby southern hills through Big Sur will bring VCSH. Atmospheric river will eventually bring periods of mod to heavy rain and gusty southerly winds after 06Z WED (beyond end of current TAF package).

MTR WATCHES/WARNINGS/ADVISORIES. Tday. Wind Advisory . CAZ006-505-509-530 GLW . Pt Arena to Pt Reyes 0-10 nm GLW . Pt Reyes to Pigeon Pt 0-10 nm GLW . Pigeon Pt to Pt Pinos 0-10 nm GLW . Pt Pinos to Pt Piedras Blancas 0-10 nm GLW . Pt Arena to Pigeon Pt 10-60 nm GLW . Pigeon Pt to Pt Piedras Blancas 10-60 nm GLW . SF Bay GLW . Mry Bay



PUBLIC FORECAST: RGass/MM AVIATION: DRP MARINE: DRP

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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 4 mi47 min NW 16 G 23 50°F 1011.5 hPa
RCMC1 - 9414863 - Richmond, CA 5 mi47 min NW 16 G 19 48°F 52°F1011.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 7 mi47 min NW 17 G 20 47°F 1011.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 8 mi36 min NNW 15 49°F 1011 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi47 min N 12 G 16 47°F 1011.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 11 mi47 min NNW 9.9 G 17
PXSC1 11 mi47 min 49°F 34°F
OBXC1 11 mi47 min 48°F 33°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 12 mi47 min WNW 8.9 G 13 48°F 1010.7 hPa
UPBC1 12 mi47 min WNW 16 G 20
MZXC1 - 9415102 - Martinez-Amorco CA 12 mi47 min W 17 G 19 45°F 52°F1011.1 hPa
LNDC1 12 mi47 min NNW 12 G 17 48°F 1011.5 hPa
FTPC1 - 9414290 - San Francisco, CA 13 mi47 min N 6 G 11 49°F 53°F1011.7 hPa
AAMC1 - 9414750 - Alameda, CA 13 mi47 min NW 6 G 8.9 49°F 51°F1011.8 hPa
PCOC1 - 9415144 - Port Chicago, CA 17 mi47 min W 9.9 G 13 46°F 51°F1011.2 hPa
46237 - San Francisco Bar, CA (142) 20 mi47 min 51°F10 ft
SFXC1 - San Francisco Bay Reserve, CA 23 mi92 min NW 8.9 43°F 1011 hPa29°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 24 mi47 min WNW 12 G 17 46°F 1010.7 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 31 mi27 min NW 29 G 37 52°F14 ft1012.5 hPa
RTYC1 - 9414523 - Redwood City, CA 32 mi47 min WNW 19 G 24 48°F 53°F1012.4 hPa
BDXC1 46 mi71 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, CA15 mi24 minWNW 1110.00 miFair48°F30°F50%1009.8 hPa
Napa, Napa County Airport, CA17 mi23 minN 310.00 miFair45°F32°F61%1010.2 hPa
Novato / Gnoss Field, CA17 mi42 minNW 14 G 2110.00 miFair52°F30°F44%1011.2 hPa
Oakland, Metro Oakland International Airport, CA19 mi24 minNNW 1110.00 miPartly Cloudy53°F30°F41%1011.7 hPa
Hayward, Hayward Air Terminal, CA24 mi23 minNW 1510.00 miFair50°F28°F43%1012.3 hPa
San Francisco, San Francisco International Airport, CA24 mi21 minWNW 22 G 2810.00 miA Few Clouds and Breezy52°F34°F50%1011.6 hPa

Link to 5 minute data for KCCR

Wind History from CCR (wind in knots)
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1 day agoCalm6N5W75W8S4S6SE3S7SE4S3S5S5CalmS5S9S7S6S9S11S6SW8SW11
2 days agoS8SW4SE9S8S5SE4CalmCalmS4S3CalmSE4CalmSE3N4NE5N5CalmN5NE3CalmCalmCalm3

Tide / Current Tables for Richmond, Chevron Oil Pier, California (2)
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Richmond
Click for Map
Mon -- 03:08 AM PST     3.14 feet Low Tide
Mon -- 04:57 AM PST     Moonset
Mon -- 07:18 AM PST     Sunrise
Mon -- 09:00 AM PST     6.11 feet High Tide
Mon -- 02:33 PM PST     Moonrise
Mon -- 04:20 PM PST     -0.24 feet Low Tide
Mon -- 05:25 PM PST     Sunset
Mon -- 11:36 PM PST     4.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.23.83.43.13.33.84.55.25.96.15.95.13.92.41.10.2-0.2-0.10.41.22.23.244.5

Tide / Current Tables for Pinole Point 1.2 mi W, San Pablo Bay, California Current
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Pinole Point 1.2 mi W
Click for Map
Mon -- 12:25 AM PST     -0.00 knots Slack
Mon -- 02:12 AM PST     -0.31 knots Max Ebb
Mon -- 04:03 AM PST     0.00 knots Slack
Mon -- 04:57 AM PST     Moonset
Mon -- 06:37 AM PST     0.81 knots Max Flood
Mon -- 07:18 AM PST     Sunrise
Mon -- 10:22 AM PST     -0.00 knots Slack
Mon -- 02:17 PM PST     -1.19 knots Max Ebb
Mon -- 02:32 PM PST     Moonrise
Mon -- 05:25 PM PST     Sunset
Mon -- 06:32 PM PST     0.00 knots Slack
Mon -- 09:21 PM PST     0.77 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0.2-0.3-0.3-00.40.70.80.70.50.1-0.3-0.8-1.1-1.2-1.2-1-0.7-0.20.20.60.80.70.6

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.
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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.