Monday, July13, 2020
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Marine Weather and Tides
Elkhorn, 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 5:57AMSunset 8:27PM Monday July 13, 2020 4:21 AM PDT (11:21 UTC) Moonrise 12:05AMMoonset 1:06PM Illumination 44% Phase: Third Quarter Moon; Moon at 23 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- 330 Am Pdt Mon Jul 13 2020
Today..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 8 seconds.
Tonight..SW winds up to 10 kt. Wind waves 1 ft. W swell 2 to 4 ft at 9 seconds.
Tue..SW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 4 ft at 9 seconds.
Tue night..SW winds up to 10 kt. Wind waves 1 ft. W swell 2 to 4 ft at 9 seconds.
Wed..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 3 ft at 9 seconds.
Wed night..W winds around 5 kt. Wind waves 1 ft. W swell 2 to 4 ft at 10 seconds.
Thu..SW winds up to 10 kt. Wind waves 1 ft. W swell 2 to 4 ft.
Fri..SW winds up to 10 kt. Wind waves 1 ft. W swell 2 to 4 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 330 Am Pdt Mon Jul 13 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwest winds continuing mainly over the northern and outer coastal waters today into Tuesday. These winds will generate steep fresh swell resulting in hazardous conditions for small craft vessels. By midweek, a nearly stationary low pressure trough will develop over the coastal waters and cause winds to shift to a southerly direction mainly over the southern and inner coastal waters. A longer period south swell will mix with the steep fresh northwest swell.


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 130951 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 251 AM PDT Mon Jul 13 2020

SYNOPSIS. Interior areas are forecast to cool over through midweek as onshore flow increases and high pressure weakens. Temperatures will then likely remain near seasonal averages for the remainder of the week and into next weekend. Expect increasing night and morning low clouds through midweek.

DISCUSSION. as of 02:49 AM PDT Monday . More widespread stratus has developed over the Pacific and shifted southward from the San Francisco Peninsula down along the Big Sur Coast. While conditions to the north along the coast have cleared, do expect the boundary layer to continue to moisten as onshore flow increases through the remainder of the night. However, inland stratus intrusion will likely be limited to the Monterey Bay region and/or through the Golden Gate into Oakland.

Look for onshore flow to spread further inland today in response to weakening high pressure over the Desert Southwest and troughing over the Pacific Northwest. This will result in a cooling trend of around 5 to 12 degrees across the interior while only slight cooling is likely near the coast. As surface winds ease and turn southerly Tuesday into Wednesday, additional cooling is likely in places such as Big Sur, Santa Cruz and into the North Bay coastal valleys. Additionally, the marine layer will likely become better defined by midweek allowing for more widespread overnight and morning low clouds.

Another trough is forecast to develop along the West Coast late in the week which will help to keep temperatures near seasonal averages. While it is difficult to forecast the exact depth of the marine layer late in the week, do expect the typical ebb and flow of low clouds into the coastal valleys each night/morning. Slight warming of the interior looks possible by next weekend as onshore flow diminishes slightly.

AVIATION. as of 10:54 PM PDT Sunday . for 06z TAFs. VFR; however, stratus slowly builds over the ocean. Clouds are expected to move in overnight extending cloud cover to area terminals to IFR conditions for coastal locations. Though they will back off slightly, winds remain onshore and breezy. VFR is forecast for inland areas on Tuesday while clouds will linger closer to the coast. Tuesday night will see an earlier return of low clouds.

Vicinity of KSFO . Stratus clouds build on the west side of the peninsula with northwest winds still around 20 kts. Low clouds are expected to move over the terminals after 10z for IFR conditions overnight. Winds will decrease, but remain breezy. Cloud cover is forecast to remain until around 17z before a return to VFR. Winds will once again become gusty Tuesday afternoon with gusts between 21-25 kts. With a deeper marine layer in place, an earlier return of clouds Tuesday night is forecast.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Clear skies currently, but IFR conditions are forecast as stratus moves in overnight as winds ease. Clouds will break up for VFR conditions Tuesday afternoon, but expect them to linger around coastal terminals for much of the day as winds stay onshore and breezy in the afternoon. Lowering cigs to IFR conditions is expected to be earlier Tuesday night.

MARINE. as of 8:34 PM PDT Sunday . Winds remain strong out of the northwest with near-gale gusts measured along the Sonoma coastline. These winds will prevail through Monday and generate steep fresh swell resulting in hazardous conditions for small craft vessels. By midweek, winds weaken significantly and shift southward along the coast. A longer period south swell will mix with the steep fresh northwest swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Reyes to Pigeon Pt 0-10 nm until 6 AM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 6 AM SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 PM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . SF Bay from 9 AM



PUBLIC FORECAST: RGass AVIATION: DK MARINE: DK

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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 mi96 min SSE 5.1 55°F 55°F
MLSC1 - Moss Landing, South Harbor, CA 3 mi104 min S 4.1 G 11 1012.3 hPa
46092 - MBM1 16 mi122 min NW 16 54°F 54°F1011.5 hPa (+0.0)
MEYC1 17 mi45 min WSW 4.1 G 7 54°F 62°F1012.6 hPa
46114 - West Monterey Bay, CA 33 mi55 min 54°F7 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 34 mi41 min NNW 16 G 21 55°F 54°F1012.5 hPa54°F
46239 - Point Sur, CA (157) 38 mi55 min 52°F8 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA9 mi28 minN 04.00 miFog/Mist54°F54°F100%1011.9 hPa
Salinas, Salinas Municipal Airport, CA13 mi28 minWNW 85.00 miFog/Mist58°F54°F87%1012.8 hPa
Monterey Regional Airport, CA17 mi27 minWSW 64.00 miFog/Mist57°F54°F90%1013.7 hPa
Hollister, CA, CA19 mi26 minN 010.00 miFair55°F50°F82%1011.8 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalm4S7S76SW7S9S7S8S7S6S6SE6SE5SE4E4NE3CalmCalmCalm
1 day agoCalmCalmCalmS3SE33S5S8S8S9S7S9S7S7S7SE6S5S3CalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmSW3SE33S7S6S7SW8S8S8S9S8S8S5CalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Elkhorn, California (2)
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Elkhorn
Click for Map
Mon -- 12:18 AM PDT     1.86 feet Low Tide
Mon -- 01:05 AM PDT     Moonrise
Mon -- 05:49 AM PDT     3.20 feet High Tide
Mon -- 05:58 AM PDT     Sunrise
Mon -- 11:28 AM PDT     1.71 feet Low Tide
Mon -- 02:06 PM PDT     Moonset
Mon -- 06:14 PM PDT     4.74 feet High Tide
Mon -- 08:26 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.91.92.22.52.93.13.23.12.72.321.71.82.12.63.344.54.74.64.23.62.82.1

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Mon -- 01:06 AM PDT     Moonrise
Mon -- 02:04 AM PDT     0.00 knots Slack
Mon -- 04:38 AM PDT     0.31 knots Max Flood
Mon -- 06:00 AM PDT     Sunrise
Mon -- 07:32 AM PDT     -0.00 knots Slack
Mon -- 09:58 AM PDT     -0.39 knots Max Ebb
Mon -- 01:41 PM PDT     0.00 knots Slack
Mon -- 02:07 PM PDT     Moonset
Mon -- 04:41 PM PDT     0.41 knots Max Flood
Mon -- 07:49 PM PDT     -0.00 knots Slack
Mon -- 08:26 PM PDT     Sunset
Mon -- 10:42 PM PDT     -0.56 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.3-0.2-00.20.30.30.20.1-0.1-0.3-0.4-0.3-0.2-0.10.10.30.40.40.30.2-0-0.3-0.5-0.6

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 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 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.