Thursday, December12, 2019
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Marine Weather and Tides
La Selva Beach, 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 7:09AMSunset 4:52PM Thursday December 12, 2019 10:29 AM PST (18:29 UTC) Moonrise 5:34PMMoonset 7:35AM Illumination 99% 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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PZZ535 Monterey Bay- 847 Am Pst Thu Dec 12 2019
Today..W winds around 5 kt. Wind waves 1 ft. W swell 4 to 6 ft at 18 seconds, increasing to 6 to 8 ft at 19 seconds this afternoon. Patchy fog. A slight chance of rain.
Tonight..E winds around 5 kt. Wind waves 1 ft. W swell 8 to 10 ft at 19 seconds. Patchy fog.
Fri..W winds up to 10 kt. Wind waves 1 ft. W swell 8 to 10 ft at 18 seconds. A chance of rain.
Fri night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 8 to 10 ft at 17 seconds. A chance of rain.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 7 to 9 ft at 16 seconds. A slight chance of rain.
Sat night..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft at 15 seconds.
Sun..N winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 5 to 7 ft.
Mon..NE winds 5 to 10 kt. Wind waves 1 ft. W swell 4 to 6 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 847 Am Pst Thu Dec 12 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds remain light and will prevail through Thursday before switching to west to northwest. By Friday night, northwest winds will increase as the next storm system moves in. A large long-period northwest swell will impact the waters through Saturday. Hazardous conditions for small craft vessels will exist with this arriving northwest swell due to steep large seas.


7 Day Forecast for Marine Location Near La Selva Beach, CA
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location: 36.93, -121.85     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 121754 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 954 AM PST Thu Dec 12 2019

SYNOPSIS. Light rain will linger over the region through the morning before diminishing in coverage later in the day. Rain chances increase again Friday into Saturday with temperatures turning colder Sunday into Monday. An unsettled and wet pattern will likely return by middle of next week.

DISCUSSION. as of 9:36 AM PST Thursday . Lots of drizzle or light rain reports this morning as zonal flow aloft continues to bring moisture into the state. Expect on and off drizzle through the day, but decreasing overnight.

By late Friday into Saturday, moisture advection will again increase over the northern and central California coast ahead of an upper level system that will drop southward over the region. This will bring renewed chances for light to moderate rain first developing over the North Bay early Friday before spreading southward Friday night. The best chances for rainfall will be over the greater San Francisco Bay Area with lesser chances for the Central Coast. Unsettled (showery) conditions could persist into Saturday before drying out late Saturday night into Sunday.

Conditions will dry out and temperatures will turn cooler Sunday into early next week as a colder air mass moves over the area from the north. Looking for more widespread 30s and 40s for overnight lows from Saturday night into Monday night. Will need to watch for the potential for areas of frost or even freezing temperatures in the region's coldest interior valleys early next week.

While the operational models continue to differ in the details heading into the latter part of next week, the ensembles do indicate a return to unsettled and wet conditions with the potential for more widespread rainfall across the region during the extended forecast period.

AVIATION. as of 9:50 AM PST Thursday . for 18z TAFs. Low to mid-level stratus clouds surround the Bay Area and the Central Coast. Mostly widespread MVFR conditions but occasional IFR, even isolated terminals at LIFR, is possible as moisture from the ocean continues to move over the area. Less than 10 kts winds will prevail across all terminals. Isolated, very light on and off rain showers persist, but will be too weak to for extended showers that could wet runways. After sunset, forecast is for cigs to lower once again as MVFR continues trending toward IFR, locally LIFR-VLIFR overnight.

Vicinity of KSFO . Light winds prevail. MVFR conditions with cigs around 1500 feet as stratus clouds sit over the region. A passing shower is possible through the TAF period, but nothing for long durations. Lowering cigs is forecast tonight trending to IFR conditions.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Winds are light with cigs around 1500 feet providing mostly MVFR conditions. Cigs should improve somewhat this afternoon but persist with MVFR. Light, passing showers are possible through the TAF period, but nothing long enough to wet runways. Tonight sees cigs lower once again to borderline LIFR/IFR overnight.

MARINE. as of 09:41 AM PST Thursday . Southerly winds remain light and will prevail through Thursday before switching to west to northwest. By Friday night, northwest winds will increase as the next storm system moves in. A large long-period northwest swell will impact the waters through Saturday. Hazardous conditions for small craft vessels will exist with this arriving northwest swell due to steep large seas.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. High Surf Advisory . CAZ006-505-509-529-530 SCA . Pt Arena to Pt Reyes 0-10 nm from 10 AM SCA . Pt Reyes to Pigeon Pt 0-10 nm from 10 AM SCA . Pigeon Pt to Pt Pinos 0-10 nm from 10 AM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm from 10 AM SCA . Pt Arena to Pigeon Pt 10-60 nm from 10 AM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm from 10 AM



PUBLIC FORECAST: Sims AVIATION: DK MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MLSC1 - Moss Landing, South Harbor, CA 9 mi158 min ESE 1.9 G 7 56°F 1026.5 hPa53°F
ELXC1 - Elkhorn Slough Reserve, CA 10 mi104 min Calm 58°F 1027 hPa55°F
46092 - MBM1 16 mi82 min NE 3.9 56°F 57°F1026.8 hPa (+1.8)
46240 - Cabrillo Point, Monterey Bay, CA (158) 21 mi59 min 57°F3 ft
MEYC1 23 mi53 min 58°F1027.1 hPa
46114 - West Monterey Bay, CA 30 mi59 min 57°F7 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 31 mi39 min SE 3.9 G 5.8 58°F 57°F8 ft1027.1 hPa58°F
46239 - Point Sur, CA (157) 43 mi59 min 57°F7 ft
RTYC1 - 9414523 - Redwood City, CA 44 mi59 min Calm G 1.9 61°F 57°F1026.5 hPa

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA3 mi36 minN 01.50 miFog/Mist59°F57°F96%1027.3 hPa
Monterey Regional Airport, CA23 mi35 minN 010.00 miOvercast65°F59°F81%1028.2 hPa
Salinas, Salinas Municipal Airport, CA23 mi36 minSE 710.00 miA Few Clouds60°F52°F75%1027.9 hPa
Hollister, CA, CA23 mi34 minN 010.00 miMostly Cloudy61°F53°F77%1027.4 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrW3W3SW3CalmCalmNW3N4CalmNW3N3CalmCalmCalmCalmCalmCalmCalmNW3CalmCalmCalmCalmCalmCalm
1 day agoSE5E7Calm3SW4SW4CalmW5W4CalmCalmE3E4N3NW4NW3CalmNW4N3NW3CalmN3CalmCalm
2 days agoSW3CalmCalm3CalmW5W5CalmNW3CalmN3NW3CalmCalmCalmCalmNW4NW3CalmCalmCalmNW3CalmE4

Tide / Current Tables for Elkhorn Slough railroad bridge, Monterery Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Thu -- 12:47 AM PST     -0.00 knots Slack
Thu -- 02:55 AM PST     -0.45 knots Max Ebb
Thu -- 05:57 AM PST     0.00 knots Slack
Thu -- 07:10 AM PST     Sunrise
Thu -- 07:34 AM PST     Moonset
Thu -- 08:54 AM PST     0.51 knots Max Flood
Thu -- 11:36 AM PST     -0.00 knots Slack
Thu -- 03:05 PM PST     -1.01 knots Max Ebb
Thu -- 04:52 PM PST     Sunset
Thu -- 05:35 PM PST     Moonrise
Thu -- 07:00 PM PST     0.00 knots Slack
Thu -- 10:02 PM PST     0.75 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.3-0.1-0.4-0.5-0.4-0.200.20.40.50.40.2-0.1-0.5-0.9-1-0.9-0.7-0.4-00.40.70.70.7

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (13,3,4,5)
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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 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.