Saturday, August8, 2020
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Marine Weather and Tides
Roseland, 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 6:18AMSunset 8:14PM Saturday August 8, 2020 4:07 AM PDT (11:07 UTC) Moonrise 10:10PMMoonset 10:04AM Illumination 80% Phase: Waning Gibbous; Moon at 19 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 200 Am Pdt Sat Aug 8 2020
Today..S winds 5 to 15 kt, becoming W this afternoon. Wind waves 1 to 2 ft. NW swell 6 to 8 ft at 10 seconds.
Tonight..W winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft at 10 seconds.
Sun..S winds 5 to 10 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft at 10 seconds.
Sun night..S winds 5 to 10 kt. Wind waves 1 ft. NW swell 6 to 8 ft at 12 seconds.
Mon..SE winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 6 to 8 ft at 12 seconds and S around 2 ft at 19 seconds.
Mon night..S winds around 5 kt. Wind waves 1 ft. NW swell 5 to 7 ft at 11 seconds and S 2 to 3 ft at 18 seconds.
Tue..W winds up to 10 kt. Wind waves 1 ft. NW swell 4 to 6 ft and S 2 to 3 ft.
Wed..NW winds 10 to 20 kt. Wind waves 1 to 2 ft. NW swell 4 to 6 ft and S 2 to 3 ft.
PZZ500 200 Am Pdt Sat Aug 8 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Split flow today and tonight with north to northwest winds over the outer waters and southerly winds along the inner coastal waters. Expect locally breezy conditions to persist over the northern outer waters through much of the weekend. These winds will create locally hazardous conditions for smaller vessels. Winds will diminish into Sunday with southerly winds gradually expanding into much of the outer waters. Mixed seas will continue through the period with a short period northwest swell and a longer period southerly swell.


7 Day Forecast for Marine Location Near Roseland, CA
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location: 38.43, -122.71     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 081003 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 303 AM PDT Sat Aug 8 2020

SYNOPSIS. Warmer temperatures are expected over the weekend, especially inland. Slightly cooler weather returns early next week.

DISCUSSION. As of 3:00 AM PDT Saturday . There is a weak upper level low over central California with high pressure to the west and to the east over Texas. The upper low is forecast to drift off the coast today allowing the high over Texas to build westward. The 500 mb heights rise which will result in warmer temperatures today and Sunday. Temperatures will be warmest on Sunday ranging from the mid 60s to low 70s at the coast . to the 90s well inland, about 5 degrees above normal. The marine layer will become compressed while surface winds become light southerly near the coast. This will maintain the night and morning low clouds at the coast with less inland penetration.

Something to watch is the upper low drawing in some mid-level moisture from the Sierras into our district. Models indicate increased humidities at around 700 mb Saturday afternoon but believe there is not enough instability to cause any elevated convection within the CWA as the low will be drifting westward.

Still looking at cooling for early next week as an upper trough moves into British Columbia and deepens along the west coast. Temperatures should cool back to near normal values.

AVIATION. As of 10:31 PM PDT Friday . for 06z TAFs. Mostly VFR at this hour, with MVFR down near the Monterey Bay. Clouds will thicken and lower for MVFR/IFR conditions overnight, but drier air inland will prevent widespread coverage. Winds remain onshore, but continue to reduce. Cigs should lift and break up around 17z Saturday morning for VFR in the afternoon. Winds will become breezy in the afternoon with a return of stratus Saturday night.

Vicinity of KSFO . VFR with only a finger of stratus extending through the Golden Gate towards the East Bay. Winds are breezy but continue to ease. MVFR conditions are expected after 10z with a chance of dropping to IFR conditions. VFR forecast after 17z with increasing onshore winds.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . MVFR trending to IFR as stratus clouds are moving from the Bay and over to terminals within the last 40 minutes. Chances of reduced vis and LIFR conditions are possible in the early morning hours. Improving conditions after 17z as stratus retreats to the ocean for VFR Saturday afternoon. Winds have eased which will prevail overnight; breezy onshore winds Saturday afternoon.

MARINE. as of 01:56 AM PDT Saturday . Split flow today and tonight with north to northwest winds over the outer waters and southerly winds along the inner coastal waters. Expect locally breezy conditions to persist over the northern outer waters through much of the weekend. These winds will create locally hazardous conditions for smaller vessels. Winds will diminish into Sunday with southerly winds gradually expanding into much of the outer waters. Mixed seas will continue through the period with a short period northwest swell and a longer period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . SF Bay from 3 PM



PUBLIC FORECAST: W Pi AVIATION: DK MARINE: AS

Visit us at www.weather.gov/sanfrancisco

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 34 mi27 min SSE 7.8 G 14 51°F 53°F1013.4 hPa51°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 35 mi49 min SW 14 G 17 58°F 1013.1 hPa
RCMC1 - 9414863 - Richmond, CA 38 mi49 min 66°F
SFXC1 - San Francisco Bay Reserve, CA 40 mi82 min W 9.9
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi49 min SW 17 G 21 58°F 1014 hPa
UPBC1 41 mi49 min WNW 9.9 G 13
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi49 min WNW 9.9 G 13 61°F 69°F1013 hPa
PCOC1 - 9415144 - Port Chicago, CA 44 mi49 min W 18 G 19 61°F 70°F1012.5 hPa
FTPC1 - 9414290 - San Francisco, CA 45 mi49 min 63°F
46237 - San Francisco Bar, CA (142) 45 mi37 min 59°F5 ft
PXSC1 46 mi49 min 58°F 58°F
OBXC1 47 mi49 min 58°F 58°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 47 mi27 min SSE 9.7 G 14 53°F 54°F1014.5 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 47 mi49 min NW 1 G 1.9 57°F 1013 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi49 min WNW 2.9 G 5.1 58°F 1014.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi49 min SW 2.9 G 5.1
LNDC1 49 mi49 min NNE 1.9 G 2.9 60°F 1014 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA8 mi74 minN 09.00 miFair54°F52°F93%1012.9 hPa
Petaluma Municipal Airport, CA13 mi72 minN 08.00 miMostly Cloudy55°F55°F100%1013.9 hPa
Novato / Gnoss Field, CA21 mi72 minN 010.00 miFair55°F51°F88%1013.9 hPa

Link to 5 minute data for KSTS

Wind History from STS (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmSE3SE3CalmSW65S7S9S10S11S11S10SE10S7S4SE3S5SE3CalmCalm
1 day agoCalmCalmCalmCalmCalm3Calm4SW5SE6S8S9SE10S7SW9W9SE8SE8S7S4S4CalmCalmCalm
2 days agoCalmCalmCalmCalmS44Calm5Calm5SW7S9S8SE9
G18
SE12SE11S9S6S4S3S3CalmCalmCalm

Tide / Current Tables for Upper drawbridge, Petaluma River, San Pablo Bay, California
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Upper drawbridge
Click for Map
Sat -- 12:12 AM PDT     1.90 feet Low Tide
Sat -- 05:02 AM PDT     5.74 feet High Tide
Sat -- 06:19 AM PDT     Sunrise
Sat -- 11:03 AM PDT     Moonset
Sat -- 12:19 PM PDT     0.71 feet Low Tide
Sat -- 06:12 PM PDT     6.02 feet High Tide
Sat -- 08:11 PM PDT     Sunset
Sat -- 11:09 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.92.23.14.25.35.75.64.942.91.91.10.70.91.734.45.565.95.34.43.52.6

Tide / Current Tables for Lakeville, Petaluma River, San Pablo Bay, California
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Lakeville
Click for Map
Sat -- 04:51 AM PDT     5.50 feet High Tide
Sat -- 06:19 AM PDT     Sunrise
Sat -- 11:03 AM PDT     Moonset
Sat -- 11:59 AM PDT     0.71 feet Low Tide
Sat -- 06:01 PM PDT     5.76 feet High Tide
Sat -- 08:11 PM PDT     Sunset
Sat -- 11:09 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.92.33.34.45.25.55.24.63.62.51.60.90.71.123.24.55.45.85.54.943.12.4

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 (7,2,3,4)
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Ground Weather Radar Station Sacramento, CA
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Disclaimer:
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.