Saturday, April4, 2020
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Marine Weather and Tides
Redwood, 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 6:47AMSunset 7:36PM Saturday April 4, 2020 7:02 AM PDT (14:02 UTC) Moonrise 2:45PMMoonset 4:02AM Illumination 88% Phase: Waxing Gibbous; Moon at 11 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- 349 Am Pdt Sat Apr 4 2020
.small craft advisory in effect from Sunday morning through Sunday afternoon...
Today..SW winds 10 to 20 kt gusts up to 25 kt. Rain.
Tonight..SW winds 5 to 15 kt. Rain likely.
Sun..SW winds 15 to 25 kt with gusts up to 30 kt. Rain.
Sun night..W winds up to 10 kt. A chance of rain.
Mon..NE winds 5 to 10 kt. A chance of rain.
Mon night..NW winds 5 to 10 kt.
Tue..W winds up to 10 kt.
Wed..SW winds up to 10 kt.
PZZ500 349 Am Pdt Sat Apr 4 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will shift to southwesterly as a warm front moves eastward over the coastal waters and bays today. The warm front will move to the north central coast tonight and become replaced by a cold upper level low and cold front from the gulf of alaska on Sunday. Wet weather will develop today and continue into early next week. High pressure will bring a return of drier weather by the middle of next week. A prevailing moderate northwesterly swell will last through much of the forecast period.


7 Day Forecast for Marine Location Near Redwood, CA
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location: 37.52, -122.2     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 041212 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 512 AM PDT Sat Apr 4 2020

SYNOPSIS. Forecast remains on track with North Bay rain this morning spreading over the Bay Area this afternoon and reaching the Central Coast by late afternoon/evening. Rainfall today will mostly be light, though moderate at times in the North Bay. Showers overnight become a steady rain on Sunday as another system drops down the coast. Locally heavy rain, possible thunderstorms and gusty winds during the day Sunday. Precipitation becomes showers Sunday night into Monday as the upper low passes over the region. Showers may linger for the Central Coast Tuesday and Wednesday as the upper low slowly exits the region followed by a warming and drying trend for the second half of next week.

DISCUSSION. as of 3:41 AM PDT Saturday . Forecast remains on track early this morning with no big changes in timing or intensity of incoming storms. Rain has reached the north coast with Arcata reporting light rain. We are just starting to get some returns on radar off the Mendocino/Sonoma coast. Short term models bring rain onshore between 14-16z then spreading southward over the Bay Area through the day before reaching the Central Coast late afternoon/evening hours. This initial storm wont pack too much punch and mainly expecting light rainfall today as the main energy passes to our north. Scattered showers overnight will become a steady rain by Sunday morning as a deeper trough drops down the coast. There will be better jet dynamics with diffluence aloft, steeper lapse rates and a more well defined surface boundary with stronger surface forcing and upslope flow to produce some locally heavy rain. The boundary looks fairly progressive on Sunday and last few model runs have focused heaviest rains from the Santa Cruz mtns southward to the Santa Lucia range above Big Sur. This is not an atmospheric river but rather a cold core system so rain totals of around 0.75-1.50 inches for the valleys with 2-3 inches for the hills when all is said and done. Most of the climate sites around the Bay Area are running 40-50% of normal so this will be one last chance to put some dents into the season rainfall deficits. Last few model runs have kept the core of the upper low and thus the associated cold air farther offshore. This has reduced t-storm chances on the model solutions though some isolated t-storms later Sunday afternoon through Monday afternoon will still be possible.

Precip will turn showery on Sunday night as the main surface boundary moves through. Shower chances stay in the forecast Monday but if the 06z nam is right the best forcing stays offshore and activity looks to be scattered at best with the higher terrain of the Central Coast the most likely location for some t-storms on Monday. Snow levels aren't as low as previously forecast due to the upper low staying offshore. On Sunday when the steady precip fall the snow levels stay well above 4000 feet, then lowering to around 3500 feet by Monday when precip becomes more showery.

Shower chances linger for the Central Coast on Tuesday with the upper low over Southern California. The operational ECMWF would keep shower threat going into Weds with slow moving low but Blend of Models suggest we should see drying by Weds with a ridge building by Thursday and Friday.

AVIATION. as of 5:12 AM PDT Saturday . For 12Z TAFs. VFR to MVFR ceilings and visibilities with light rain developing today. Showery weather develops tonight and Sunday with a cold upper level low arriving from the Gulf of Alaska. Strong and gusty winds developing Sunday morning per recent statistical guidance.

Vicinity of KSFO . VFR, tempo light rain 15z-18z with ceilings gradually lowering to MVFR today. Wind from the southwest today. South to southeast tonight and Sunday and strengthening per recent statistical guidance, could get close to airport weather warning criteria near 35 knots.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR to MVFR ceilings, light rain developing late morning to afternoon. MVFR ceilings later today, tonight and Sunday morning.

MARINE. as of 5:01 AM PDT Saturday . Winds will shift to southwesterly as a warm front moves eastward over the coastal waters and bays today. The warm front will move to the north Central Coast tonight and become replaced by a cold upper level low and cold front from the Gulf of Alaska on Sunday. Wet weather will develop today and continue into early next week. High pressure will bring a return of drier weather by the middle of next week. A prevailing moderate northwesterly swell will last through much of the forecast period.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 9 AM



PUBLIC FORECAST: RWW AVIATION/MARINE: Canepa

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 1 mi45 min 60°F
AAMC1 - 9414750 - Alameda, CA 18 mi45 min W 5.1 G 11 50°F 59°F1013.8 hPa
LNDC1 19 mi45 min WSW 7 G 8.9 51°F 1013.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi45 min WSW 8.9 G 13
OBXC1 21 mi51 min 50°F 46°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi45 min W 9.9 G 12 50°F 1013.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi45 min WSW 8 G 13 49°F 1012.6 hPa
PXSC1 22 mi45 min 51°F 46°F
FTPC1 - 9414290 - San Francisco, CA 24 mi45 min 58°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi45 min SW 6 G 8 51°F 1013.7 hPa
46237 - San Francisco Bar, CA (142) 29 mi33 min 55°F4 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 29 mi41 min S 6 48°F 1013 hPa
RCMC1 - 9414863 - Richmond, CA 30 mi45 min SSW 1.9 G 5.1 51°F 57°F1013.2 hPa
UPBC1 36 mi45 min W 8.9 G 16
MZXC1 - 9415102 - Martinez-Amorco CA 36 mi45 min SW 8 G 15 50°F 58°F1012.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi45 min WSW 8.9 G 13 51°F 1012.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 38 mi45 min SSW 1.9 G 7 47°F 58°F1012.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 38 mi23 min W 5.8 G 7.8 51°F 52°F1014 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 38 mi23 min WNW 9.7 G 12 52°F 54°F1014.1 hPa48°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 40 mi45 min W 5.1 G 11 51°F 1012.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 48 mi78 min W 8.9

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA3 mi63 minW 310.00 miA Few Clouds48°F41°F76%1014.6 hPa
Hayward, Hayward Air Terminal, CA11 mi69 minWSW 610.00 miOvercast50°F42°F74%1014.9 hPa
San Francisco, San Francisco International Airport, CA11 mi67 minWSW 510.00 miMostly Cloudy50°F42°F74%1013.8 hPa
Oakland, Metro Oakland International Airport, CA12 mi70 minW 1010.00 miMostly Cloudy52°F43°F72%1014 hPa
Half Moon Bay Airport, CA16 mi68 minWNW 310.00 miOvercast50°F44°F82%1014.6 hPa
San Jose, San Jose International Airport, CA18 mi70 minSSE 510.00 miPartly Cloudy42°F37°F82%1014.4 hPa
Livermore, Livermore Municipal Airport, CA24 mi70 minSSW 710.00 miOvercast47°F39°F77%1013.4 hPa
San Jose / Reid / Hillv, CA24 mi16 minN 010.00 miClear43°F35°F76%1014.6 hPa

Link to 5 minute data for KSQL

Wind History from SQL (wind in knots)
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1 day agoCalmNW5W5N7NW7NW5N8--------W14W11
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W10W10W5W6W5CalmCalmS4SW3S4
2 days agoW10NW12W10NW8NW8W11
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Tide / Current Tables for Redwood Creek entrance (inside), San Francisco Bay, California
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Redwood Creek entrance (inside)
Click for Map
Sat -- 04:41 AM PDT     2.44 feet Low Tide
Sat -- 05:01 AM PDT     Moonset
Sat -- 06:48 AM PDT     Sunrise
Sat -- 10:04 AM PDT     7.64 feet High Tide
Sat -- 03:44 PM PDT     Moonrise
Sat -- 05:11 PM PDT     -0.30 feet Low Tide
Sat -- 07:34 PM PDT     Sunset
Sat -- 11:45 PM PDT     7.24 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.65.84.53.42.62.53.24.45.97.17.67.36.44.93.11.40.2-0.3-012.64.35.97

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Sat -- 12:06 AM PDT     -0.00 knots Slack
Sat -- 02:13 AM PDT     -0.77 knots Max Ebb
Sat -- 04:59 AM PDT     0.00 knots Slack
Sat -- 05:01 AM PDT     Moonset
Sat -- 06:48 AM PDT     Sunrise
Sat -- 08:06 AM PDT     1.40 knots Max Flood
Sat -- 11:24 AM PDT     -0.00 knots Slack
Sat -- 02:20 PM PDT     -1.59 knots Max Ebb
Sat -- 03:44 PM PDT     Moonrise
Sat -- 05:42 PM PDT     0.00 knots Slack
Sat -- 07:34 PM PDT     Sunset
Sat -- 08:59 PM PDT     1.91 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.1-0.5-0.8-0.7-0.400.61.21.41.30.90.3-0.5-1.2-1.6-1.5-1.1-0.60.21.11.71.91.71.3

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.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (10,2,3,4)
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Ground Weather Radar Station San Francisco Bay Area, 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.