Saturday, December7, 2019
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Marine Weather and Tides
Sereno del Mar, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:13AMSunset 4:51PM Saturday December 7, 2019 5:35 AM PST (13:35 UTC) Moonrise 2:32PMMoonset 2:36AM Illumination 81% Phase: Waxing Gibbous; Moon at 10 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- 238 Am Pst Sat Dec 7 2019
.small craft advisory in effect through this evening...
Today..S winds 20 to 30 kt with gusts up to 35 kt. Wind waves 11 to 13 ft, decreasing to 8 to 9 ft this afternoon. W swell 7 to 8 ft at 13 seconds. A slight chance of Thunderstorms this morning. Showers. A chance of Thunderstorms this afternoon.
Tonight..SW winds 10 to 15 kt. Wind waves 4 to 5 ft. W swell 7 to 9 ft at 12 seconds. Showers likely.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft at 11 seconds. A chance of rain.
Sun night..N winds up to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft at 10 seconds.
Mon..NW winds up to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft at 15 seconds.
Mon night..NW winds up to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft at 15 seconds and S around 2 ft at 16 seconds.
Tue..E winds around 5 kt. Wind waves 1 ft. W swell 5 to 7 ft and S around 2 ft.
Wed..E winds around 5 kt. Wind waves 1 ft. W swell 6 to 8 ft and S around 2 ft. Winds and wind waves higher in and near Thunderstorms.
PZZ500 238 Am Pst Sat Dec 7 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A secondary frontal boundary will move through the coastal waters today. Scattered Thunderstorms will move into the coastal waters which could produce lightning, gusty winds, and possible waterspouts. Breezy to gusty south to southwest winds will continue through the day today before diminishing this evening. A moderate west swell will continue through Sunday. Steep wind waves will continue through the day today creating hazardous seas.


7 Day Forecast for Marine Location Near Sereno del Mar, CA
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location: 38.4, -123.09     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 071210 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 410 AM PST Sat Dec 7 2019

SYNOPSIS. Showery conditions through the morning, then another frontal band will move across the district bringing heavier showers and a chance of thunderstorms. Lingering showers on Sunday but trending drier by afternoon. Dry weather returns early next week.

DISCUSSION. as of 3:20 AM PST Saturday . Showers continue to move southward through the district although the front has weakened considerably. The complex upper low is still offshore, and another shortwave can be seen on IR satellite imagery approaching the coast. A lot of lightning is being detected with this impulse, and SPC has most of northern California under the general thunderstorm risk with a bullseye of marginal severe risk including the North Bay in the Day 1 outlook. Thus, it looks more likely for thunderstorm development this afternoon, especially across the North Bay. Therefore, another flash flood watch is warranted for the Kincade Fire burn area to account for possible brief downpours with thunderstorms in this passing shortwave. The current watch expires at 4 am.

This impulse is forecast to move through by this evening, although showers will linger into Sunday.

Winds remain gusty over the higher terrain, but are decreasing. The wind advisory will be canceled before 4 am. Winds are forecast to be gusty again as this next impulse moves through later today, but are expected to be below wind advisory criteria.

High pressure to build back in by Monday bringing drier conditions to the area. The midweek weather system still looks very weak with rain chances very slim.

AVIATION. as of 04:10 AM PST Saturday . Scattered light showers will continue through the morning hours. Skies are mainly MVFR this morning and this is expected to continue through the day. The upper low offshore will push more energy through the area this afternoon. Moderate to potentially heavy rain showers and a chance for thunderstorms will arrive this afternoon as another front pushes through. Winds this morning will gust to 25-30 kt with gusts increasing briefly this afternoon to 30-35 kt along the front. Occasional lulls have been observed at the terminals overnight and this will continue through the morning. LLWS will be a concern at the terminals through the afternoon. Winds will subside this evening after the front passes through. Scattered showers will persist this evening and overnight but rainfall should be light. MVFR cigs will persist through the end of the TAF period.

Vicinity of KSFO . MVFR cigs with bases 2000-2500 feet. Light scattered showers will persist early this morning and should decrease briefly. Scattered thunderstorms are possible this afternoon with moderate to briefly heavy rain. Southeast winds have gusted to around 30 kt overnight mixed with periods of lighter winds. Lulls in stronger winds will continue through the morning hours. Gusty winds 30-35 kt will be possible this afternoon with locally higher gusts in thunderstorms. LLWS will be a concern today especially during periods of lighter winds at the terminal.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Borderline MVFR/VFR this morning with bases 3000-5000 feet. Light rain showers continuing through the day. Gusty south to southeast winds to 20-25 kt at MRY and 30-35 kt in the Salinas Valley. Stronger winds above the surface could cause LLWS at MRY up to 2000 ft. Isolated thunderstorms are now possible into the Monterey Bay terminals this afternoon so VCTS has been added to the TAFs.

MARINE. as of 2:38 AM PST Saturday . A secondary frontal boundary will move through the coastal waters today. Scattered thunderstorms will move into the coastal waters which could produce lightning, gusty winds, and possible waterspouts. Breezy to gusty south to southwest winds will continue through the day today before diminishing this evening. A moderate west swell will continue through Sunday. Steep wind waves will continue through the day today creating hazardous seas.

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

PUBLIC FORECAST: Sims AVIATION: ST MARINE: ST

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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 15 mi25 min SSE 19 G 25 55°F1011.8 hPa
PRYC1 - 9415020 - Point Reyes, CA 29 mi53 min 54°F1012.2 hPa
46214 - Point Reyes, CA (029) 38 mi35 min 56°F12 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 47 mi25 min SSE 21 G 27 57°F 55°F1013.4 hPa
ANVC1 - 9416841 - Arena Cove, CA 48 mi53 min ESE 18 G 24 54°F1009.8 hPa
46237 - San Francisco Bar, CA (142) 49 mi35 min 54°F11 ft
RCMC1 - 9414863 - Richmond, CA 49 mi47 min 54°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 49 mi30 min SSW 5.1 58°F 1013 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, CA17 mi42 minSSE 810.00 miOvercast57°F55°F93%1012 hPa

Link to 5 minute data for KSTS

Wind History from STS (wind in knots)
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Last 24hrE3CalmCalmSE6SE5SE9S13
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1 day agoCalmCalmCalmSE3SE7SE7E3SE7E9SE9SE4SE5S3SE4S3SE3CalmS3CalmCalmSW3S5CalmCalm
2 days agoSE4S3CalmCalmCalmW3CalmCalmNW3CalmNW3N4CalmW3W3CalmCalmCalmN3NW3CalmCalmCalmCalm

Tide / Current Tables for Bodega Harbor entrance, California
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Bodega Harbor entrance
Click for Map
Sat -- 01:04 AM PST     1.70 feet Low Tide
Sat -- 02:36 AM PST     Moonset
Sat -- 07:15 AM PST     Sunrise
Sat -- 07:26 AM PST     5.40 feet High Tide
Sat -- 02:24 PM PST     1.12 feet Low Tide
Sat -- 02:32 PM PST     Moonrise
Sat -- 04:51 PM PST     Sunset
Sat -- 08:18 PM PST     3.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.91.71.92.53.34.24.95.45.34.94.13.12.21.51.21.21.62.333.63.93.83.53

Tide / Current Tables for Salt Point, California Current
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Salt Point
Click for Map
Sat -- 02:24 AM PST     0.00 knots Slack
Sat -- 02:37 AM PST     Moonset
Sat -- 05:24 AM PST     0.81 knots Max Flood
Sat -- 07:17 AM PST     Sunrise
Sat -- 08:25 AM PST     -0.00 knots Slack
Sat -- 11:20 AM PST     -1.01 knots Max Ebb
Sat -- 02:33 PM PST     Moonrise
Sat -- 03:22 PM PST     0.00 knots Slack
Sat -- 04:52 PM PST     Sunset
Sat -- 06:14 PM PST     0.76 knots Max Flood
Sat -- 09:09 PM PST     -0.00 knots Slack
Sat -- 11:34 PM PST     -0.71 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.4-0.20.20.60.80.80.60.2-0.3-0.8-1-1-0.8-0.6-0.20.30.60.80.70.50.1-0.4-0.7

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (8,2,3,4)
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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 numerious 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.