Friday, December13, 2019
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Marine Weather and Tides
Salmon Creek, 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 7:17AMSunset 4:52PM Friday December 13, 2019 5:20 AM PST (13:20 UTC) Moonrise 6:31PMMoonset 8:45AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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 Fri Dec 13 2019
.small craft advisory in effect through late tonight...
Today..S winds 5 to 10 kt. Wind waves 1 to 2 ft. W swell 12 to 14 ft at 18 seconds. Areas of dense fog this morning. A chance of rain this morning, then rain this afternoon.
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 12 to 14 ft at 17 seconds. Rain.
Sat..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 1 to 2 ft. W swell 10 to 12 ft at 16 seconds. A chance of rain.
Sat night..NW winds 10 to 20 kt. Wind waves 3 to 4 ft. W swell 8 to 10 ft at 15 seconds. A chance of rain.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 10 to 12 ft at 14 seconds.
Sun night..N winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 9 to 11 ft at 13 seconds.
Mon..E winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft.
Tue..E winds 10 to 20 kt with gusts up to 25 kt. Wind waves 5 to 6 ft. W swell 6 to 7 ft. A chance of rain.
PZZ500 238 Am Pst Fri Dec 13 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds will persist today ahead of a weak frontal boundary approaching the region. Winds will switch to the northwest tonight and increase on Saturday as a cool upper level trough passes to the north of the area. Large long-period northwest swell will impact the waters through Saturday.


7 Day Forecast for Marine Location Near Salmon Creek, CA
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location: 38.33, -123.05     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 131209 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 409 AM PST Fri Dec 13 2019

SYNOPSIS. Areas of dense fog will prevail across the coast and the coastal valleys this morning, with a disturbance spreading light rain across the region later today and tonight. The threat of light rain will continue into this weekend, as a cold front takes aim at Northern California. Drier and colder conditions will prevail on Sunday, with frost possible Sunday night. An unsettled and wet pattern will likely to return by the middle of next week.

DISCUSSION. As of 03:55 AM PST Friday . Water vapor imagery shows a dirty ridge over Northern California this morning, with plenty of high cloud cover spreading across the North Bay. Thus far, this high cloud cover is not impeding fog development across the North Bay, as all of our North Bay sites are currently reporting visibility at or below a quarter mile. Farther south, coastal areas and the coastal valleys are also dealing with this dense fog, including SFO. This dense fog will make for a nasty morning commute, with delays possible most of our airports. Therefore, a dense fog advisory remains in effect this morning through 8 am for all coastal regions and valleys.

Light rain will also gradually spread across the region today, as the next system takes aim at Northern California. In fact, radar is picking up on some light returns across northern Sonoma already, with a few sites reporting a hundredth here and there. The north half of the Bay Area will likely see the brunt of the rain over the next 24 hours, but amounts will remain light for the most. A cold front will then move across the region late in the day on Saturday. Although this cold front will bring some light rain to the region, the biggest impact will be with the colder and drier air moving in behind the front. Although Sunday will be slightly cooler than Saturday, the main impact will be on the overnight temperatures Sunday night. In fact, frosty conditions will be possible, as temperatures fall into the lower to mid 30s across the inland valleys.

Drier and warmer conditions will gradually develop for the first part of the work week, as high pressure builds over the West Coast. However, models continue to hint that a wet and unsettled pattern will return for the latter part of the work week. At this point in time, there are still some significant model differences in the timing and strength, but believe a more progressive pattern is likely looking to the ensembles. Palmer

AVIATION. as of 04:08 AM PST Friday . LIFR conditions are currently impacting most terminals across the San Francisco Bay Area and Monterey Bay Region with IFR ceilings over interior East Bay terminals. Low clouds and areas of dense fog will persist through about 15Z with improving conditions likely after 18Z. However, low ceilings will likely keep MVFR to IFR conditions through much of the day. A weak frontal system will then drop southward across the region resulting in light rain developing around 21Z over the North Bay, 00Z across the Bay Area and then 03Z for the Monterey Bay Region. Periods of lowering visibility and ceilings will also be possible during times of heavier precipitation. Precipitation should diminish region-wide by 06Z, yet worsening flight conditions are again likely to develop overnight through Saturday morning due to residual moisture and light winds in place.

Vicinity of KSFO . Patchy dense fog over the terminal will result in LIFR conditions through early morning with the potential improving visibilities and ceilings around 15Z and more so by 18Z. MVFR conditions are then likely through much of the remainder of the day with light rain likely to develop after 21Z. Generally light and variable winds are likely through this evening with an increase in west-northwest winds late in the period.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . LIFR conditions impacting regional terminals with patchy dense fog and low ceilings. Light winds also persist and will likely continue through much of the day. Conditions should improve after 18Z to IFR/MVFR with the potential for light rain to develop around 03Z.

MARINE. as of 04:08 AM PST Friday . Southerly winds will persist today ahead of a weak frontal boundary approaching the region. Winds will switch to the northwest tonight and increase on Saturday as a cool upper level trough passes to the north of the area. Large long-period northwest swell will impact the waters through Saturday.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. Dense Fog Advisory . CAZ006-505-506-509-528>530 High Surf Advisory . CAZ006-505-509-529-530 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: Palmer AVIATION: RGass MARINE: RGass

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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 14 mi31 min NNW 7.8 G 9.7 56°F10 ft1024.7 hPa
PRYC1 - 9415020 - Point Reyes, CA 23 mi51 min 55°F1023.6 hPa
46214 - Point Reyes, CA (029) 35 mi51 min 57°F14 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 41 mi31 min NNW 1.9 G 5.8 53°F 56°F11 ft1024.5 hPa
46237 - San Francisco Bar, CA (142) 44 mi51 min 55°F10 ft
RCMC1 - 9414863 - Richmond, CA 44 mi51 min S 2.9 G 5.1 54°F 55°F1023.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 44 mi40 min SSW 4.1 53°F 1024 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 46 mi57 min W 2.9 G 4.1 55°F 1023.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 47 mi57 min S 2.9 G 4.1 55°F 1024 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi51 min SW 1.9 G 4.1 53°F 55°F1024 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, CA18 mi28 minN 30.50 miLight Rain Fog54°F54°F100%1023.1 hPa
Petaluma Municipal Airport, CA24 mi46 minN 00.25 miFog54°F53°F100%1024 hPa

Link to 5 minute data for KSTS

Wind History from STS (wind in knots)
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Last 24hrCalmCalmCalmSE3CalmW3W3CalmSE5CalmS4S3S4SE3CalmCalmCalmNW3CalmSW3CalmCalmCalmN3
1 day agoCalmE3E4CalmCalmN3CalmCalmCalmS4S3SE4CalmE3CalmN3CalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmSE5SE4S333CalmS5S3CalmSE4CalmE3SE3CalmS4CalmE3E4E3CalmCalmNE3

Tide / Current Tables for Bodega Harbor entrance, California
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Bodega Harbor entrance
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Fri -- 12:22 AM PST     4.55 feet High Tide
Fri -- 05:04 AM PST     3.05 feet Low Tide
Fri -- 07:20 AM PST     Sunrise
Fri -- 08:45 AM PST     Moonset
Fri -- 10:48 AM PST     6.21 feet High Tide
Fri -- 04:52 PM PST     Sunset
Fri -- 06:02 PM PST     -0.98 feet Low Tide
Fri -- 06:30 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.54.54.13.63.23.13.33.84.65.466.25.84.83.41.80.3-0.6-1-0.70.11.22.43.5

Tide / Current Tables for Salt Point, California Current
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Salt Point
Click for Map
Fri -- 01:15 AM PST     -0.00 knots Slack
Fri -- 03:22 AM PST     -0.67 knots Max Ebb
Fri -- 06:19 AM PST     0.00 knots Slack
Fri -- 07:22 AM PST     Sunrise
Fri -- 08:47 AM PST     Moonset
Fri -- 09:17 AM PST     0.75 knots Max Flood
Fri -- 11:56 AM PST     -0.00 knots Slack
Fri -- 03:30 PM PST     -1.54 knots Max Ebb
Fri -- 04:52 PM PST     Sunset
Fri -- 06:31 PM PST     Moonrise
Fri -- 07:24 PM PST     0.00 knots Slack
Fri -- 10:28 PM PST     1.14 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.1-0.4-0.6-0.6-0.4-0.10.20.50.70.70.4-0-0.6-1.1-1.5-1.5-1.2-0.7-0.20.30.81.11.1

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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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.