Wednesday, December11, 2019
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Marine Weather and Tides
Elkhorn, 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 7:07AMSunset 4:52PM Wednesday December 11, 2019 8:01 PM PST (04:01 UTC) Moonrise 4:45PMMoonset 6:31AM Illumination 100% Phase: Full Moon; Moon at 15 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- 205 Pm Pst Wed Dec 11 2019
Tonight..SW winds around 5 kt, becoming southeast after midnight. Wind waves 1 ft. W swell 4 to 6 ft at 17 seconds. Patchy fog. A slight chance of rain after midnight.
Thu..SW winds around 5 kt. Wind waves 1 ft. W swell 5 to 7 ft at 18 seconds. Patchy fog. A slight chance of rain.
Thu night..W winds around 5 kt. Wind waves 1 ft. W swell 8 to 10 ft at 17 seconds. Patchy fog.
Fri..W winds up to 10 kt. Wind waves 1 ft. W swell 8 to 10 ft at 18 seconds. A slight chance of rain.
Fri night..W winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 8 to 10 ft at 17 seconds. A slight chance of rain.
Sat..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 7 to 9 ft at 16 seconds.
Sat night..NW winds 10 to 15 kt. Wind waves around 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..E winds 5 to 10 kt. Wind waves 1 ft. NW swell 4 to 6 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 205 Pm Pst Wed Dec 11 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light southerly winds will prevail tonight into Thursday then switch around to the northwest with the arrival of the next weather system. This next system will also bring with it a large long period northwest swells. This swell will build on Thursday, peak on Friday and continue through Saturday.


7 Day Forecast for Marine Location Near Elkhorn, CA
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location: 36.82, -121.75     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 120009 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 409 PM PST Wed Dec 11 2019

SYNOPSIS. Periods of light rain will be possible over mainly the northern portion of the forecast area through Saturday with mild temperatures region-wide. Conditions will dry out and turn cooler Sunday into Monday. Unsettled conditions will potentially return by mid/late next week.

DISCUSSION. as of 02:04 PM PST Wednesday . KMUX radar continues to indicate scattered showers mainly across the North Bay with isolated showers around San Mateo and Santa Cruz Counties. Additional showers have formed off the coast and will drift inland this afternoon. Moist zonal flow has developed and will remain in place through Friday with subtropical moisture offshore. A weak disturbance moving through the flow will interact with the abundant moisture to enhance rainfall this evening and overnight, mainly across the northern half of the forecast area. Scattered showers will continue on Thursday, with another disturbance on Friday bringing another round of light rain, once again focused on our northern areas. The moist onshore flow will finally be pushed south on Saturday as a trough approaches from the northwest. Precipitation from the trough looks to be very light and mostly brush by to our north. The trough will usher in a colder and drier airmass with Sunday and Monday cool and dry.

Precipitation amounts tonight through Thursday will range from a quarter to a half inch across the North Bay, 0.1 to 0.2 inches in the Bay Area, and less than a tenth of an inch near Monterey Bay. The higher terrain of the North Bay could pick up slightly higher amounts with totals up to an inch. Additional rainfall on Friday will range from a few hundredths to a quarter of an inch, with locally up to a half inch in the North Bay Mountains. Rainfall rates and totals are not expected to create significant impacts, with wet and slick roadways the main concern during brief periods of moderate rain.

Skies will remain cloudy through the week as moisture continues to stream inland. Temperatures will warm several degrees across southern areas on Thursday and Friday under a slightly warmer airmass. Highs both days will mainly be in the 60s, coolest across the North Bay where showers will be the most persistent and warmest in the lower elevations of Monterey and San Benito Counties. Temperatures will cool significantly on Saturday behind a cold front with highs in the mid to upper 50s. Cool temperatures will continue on Sunday and Monday as northwesterly flow aloft sets up. Overnight lows will also drop considerably with 30s possible in many valley locations.

A ridge will build over the eastern Pacific on Sunday and move overhead on Monday. The ridge looks to be short-lived as another trough is projected to approach California on Tuesday or Wednesday. Models have generally come into better agreement about this feature with the latest model cycle. Looking into the long term, the pattern looks to remain progressive into the middle of December with the potential for more significant storm systems 8-14 days into the future.

AVIATION. as of 4:10 PM PST Wednesday . A series of shortwave disturbances will keep abundant low level moisture over the area through Thursday. MVFR cigs will persist with occasional IFR cigs in the valleys and the MRY Bay Area. Some light rain is occurring mainly in the North Bay this afternoon but this will spread over the SFO Bay Area and possibly further south tonight after midnight as the next disturbance approaches. Winds will be light and generally out of the east or southeast.

Vicinity of KSFO . MVFR cigs with bases around 1500-2000 ft. Light southeast winds under 10 kt. Occasional light rain after 09-10Z.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Areas of MVFR cigs around the area becoming more widespread after 03Z. Cigs lowering into IFR category after 06-08Z. Light east to southeasterly winds under 10 kt.

MARINE. as of 04:00 PM PST Wednesday . Light southerly winds will prevail tonight into Thursday then switch around to the northwest with the arrival of the next weather system. This next system will also bring with it a large long period northwest swells. This swell will build on Thursday, peak on Friday and continue through Saturday.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. NONE.



PUBLIC FORECAST: ST AVIATION: W Pi MARINE: CW

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 1 mi77 min Calm 58°F 1023 hPa55°F
MLSC1 - Moss Landing, South Harbor, CA 3 mi173 min WNW 6 G 15 58°F 1023.3 hPa55°F
46092 - MBM1 16 mi55 min NE 3.9 56°F 56°F1023 hPa (-0.0)
46240 - Cabrillo Point, Monterey Bay, CA (158) 16 mi32 min 57°F4 ft
MEYC1 17 mi86 min 58°F1023 hPa
46114 - West Monterey Bay, CA 33 mi32 min 57°F7 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 34 mi32 min SSE 12 G 16 58°F 57°F1022.9 hPa57°F
46239 - Point Sur, CA (157) 38 mi32 min 57°F9 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA9 mi69 minNNW 310.00 miOvercast58°F55°F93%1023.4 hPa
Salinas, Salinas Municipal Airport, CA13 mi69 minN 09.00 miFair59°F52°F78%1023.7 hPa
Monterey Regional Airport, CA17 mi68 minE 310.00 miOvercast60°F52°F75%1024.4 hPa
Hollister, CA, CA19 mi67 minN 05.00 miFog/Mist57°F53°F88%1023.4 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrCalmE3E4N3NW4NW3CalmNW4N3NW3CalmN3CalmCalmW3W3SW3CalmCalmNW3N4CalmNW3N3
1 day agoN3NW3CalmCalmCalmCalmNW4NW3CalmCalmCalmNW3CalmE4SE5E7Calm3SW4SW4CalmW5W4Calm
2 days agoS3CalmCalmCalmN4NW3CalmN4CalmNW4N4CalmCalmNE3SW3CalmCalm3CalmW5W5CalmNW3Calm

Tide / Current Tables for Elkhorn, California
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Elkhorn
Click for Map
Wed -- 02:47 AM PST     2.29 feet Low Tide
Wed -- 06:31 AM PST     Moonset
Wed -- 07:09 AM PST     Sunrise
Wed -- 09:21 AM PST     5.75 feet High Tide
Wed -- 04:32 PM PST     -0.81 feet Low Tide
Wed -- 04:45 PM PST     Moonrise
Wed -- 04:50 PM PST     Sunset
Wed -- 09:14 PM PST     Full Moon
Wed -- 11:14 PM PST     3.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.22.82.42.32.63.13.94.75.45.75.65.142.61.1-0-0.7-0.7-0.20.71.72.73.33.6

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Wed -- 02:10 AM PST     -0.46 knots Max Ebb
Wed -- 05:19 AM PST     0.00 knots Slack
Wed -- 06:31 AM PST     Moonset
Wed -- 07:09 AM PST     Sunrise
Wed -- 08:13 AM PST     0.52 knots Max Flood
Wed -- 11:00 AM PST     -0.00 knots Slack
Wed -- 02:22 PM PST     -0.98 knots Max Ebb
Wed -- 04:46 PM PST     Moonrise
Wed -- 04:52 PM PST     Sunset
Wed -- 06:19 PM PST     0.00 knots Slack
Wed -- 09:14 PM PST     Full Moon
Wed -- 09:20 PM PST     0.73 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0-0.3-0.5-0.4-0.3-0.10.20.40.50.50.30-0.4-0.7-1-0.9-0.7-0.5-0.10.30.60.70.70.5

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

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Wind Forecast for San Francisco/Monterey Bay Area, CA (23,6,7,8)
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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.