Sunday, August9, 2020
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Marine Weather and Tides
Gonzales, 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 6:17AMSunset 8:03PM Sunday August 9, 2020 2:05 PM PDT (21:05 UTC) Moonrise 10:32PMMoonset 10:54AM Illumination 67% Phase: Waning Gibbous; Moon at 21 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 Pdt Sun Aug 9 2020
Today..SW winds 5 to 15 kt. Wind waves 1 ft. W swell 3 to 5 ft at 10 seconds.
Tonight..SW winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 11 seconds and sw around 2 ft at 18 seconds.
Mon..W winds up to 10 kt. Wind waves 1 ft. W swell 2 to 4 ft at 12 seconds and S around 2 ft at 17 seconds.
Mon night..W winds around 5 kt. Wind waves 1 ft. W swell 2 to 4 ft at 12 seconds and S around 2 ft at 18 seconds.
Tue..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 4 ft at 11 seconds and sw around 2 ft at 16 seconds.
Tue night..W winds around 5 kt. Wind waves 1 ft. W swell 2 to 4 ft at 11 seconds and sw around 2 ft at 16 seconds.
Wed..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 4 ft and S around 2 ft.
Thu..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 2 to 4 ft and S around 2 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 847 Am Pdt Sun Aug 9 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Split flow continues with predominately southerly winds along the coast and southern outer waters and diminishing northerly winds in the northern outer waters. Locally hazardous seas conditions will persist over the northern outer waters into this evening. Meanwhile, locally breezy winds are expected this afternoon and evening over the northern san francisco bay near the golden gate and to the delta. Mixed seas will continue through the period with a short period northwest swell and a longer period southerly swell.


7 Day Forecast for Marine Location Near Gonzales, CA
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location: 36.54, -121.46     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 092020 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 120 PM PDT Sun Aug 9 2020

SYNOPSIS. After warmer conditions returned to the region this weekend, a slight cooling trend will occur during the first half of the week, especially across the interior. Meanwhile, little change is anticipated near the coast with the typical ebb and flow of low clouds each night/morning.

DISCUSSION. as of 01:16 PM PDT Sunday . Weather conditions across the region this afternoon are mainly defined by a broad mid/upper level ridge over the Desert Southwest/Texas and a weak low off of the central/southern California coast. This has allowed for a compressed marine layer down to below 1,000 feet in depth with region-wide temperatures running a few to as much as 7 degrees warmer at this hour. With this said, southerly flow at the surface has kept low clouds along much of the coastline and up into the northern Monterey Bay where temperatures are only in the 50s to lower 60s. Thus, the warmest conditions are likely to occur across the interior this afternoon where 90s will be common.

Onshore flow is gradually forecast into increase early next week as a mid/upper level trough drops southward out of British Columbia. This will bring a slight cooling trend to the interior with only minor day-to-day changes near the coast through midweek. Additionally, the marine layer will likely deepen resulting in more widespread night/morning coastal clouds spreading inland into the valleys.

By late in the week the upper level pattern looks to return to near what is occuring overhead today. Thus, interior locations look to warm back into the upper 80s to 90s while coastal areas hold steady in the 60s to lower 70s as high pressure builds over the Desert Southwest. Additionally, moisture associated with a tropical system off of Mexico will advect into southern and/or central California by next weekend as it rotates around the upper level high. While precipitation does not appear likely at this time across our region, this is something worth keeping an eye on.

AVIATION. As of 11:05 AM PDT Sunday . for 18z TAFs. The rather compressed marine layer evacuated to the coastline by late morning. Widespread VFR with generally light winds are expected today. Locally breezy conditions through coastal gaps of up to 10 to 15kt are expected by later this afternoon to early evening. For tonight, the marine layer will be further compressed, thinning the layer, and pushing bases even lower. As a result, more terminals are anticipated to remain VFR SKC tonight however the distribution of fog and associated reductions in visby are more of a threat tonight, particularly at KMRY/KSNS. Mix out times tomorrow morning in the 1500-1630Z time range are expected.

Vicinity of KSFO . VFR today. NNE winds late this morning before switching back to onshore at around 15 kt around 2230-2300Z, similar to yesterday. For tonight, KSFO will be on the periphery of the compressed marine layer with low confidence on if the airport will see BKN/OVC cigs in the LIFR-IFR range. Will need to watch satellite closely to establish trends later today.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR today, compressed marine layer returns around 04Z tonight. Compressed marine layer will bring high likelihood of FG at terminals with drastic reductions in visibility, though the layer will be too thin for a significant impact from DZ. Rapid clearing by 16Z expected due to thin layer.

MARINE. as of 11:03 AM PDT Sunday . Split flow continues with predominately southerly winds along the coast and southern outer waters and diminishing northerly winds in the northern outer waters. Locally hazardous seas conditions will persist over the northern outer waters into this evening. Meanwhile, locally breezy winds are expected this afternoon and evening over the northern San Francisco Bay near the Golden Gate and to the Delta. Mixed seas will continue through the period with a short period northwest swell and a longer period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pigeon Pt 10-60 nm until 9 PM SCA . SF Bay until 9 PM



PUBLIC FORECAST: RGass AVIATION: DRP MARINE: DRP

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MEYC1 23 mi90 min SSW 9.9 G 13 62°F 61°F1014.5 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 24 mi40 min 58°F3 ft
ELXC1 - Elkhorn Slough Reserve, CA 24 mi81 min WNW 7 62°F 58°F
MLSC1 - Moss Landing, South Harbor, CA 25 mi26 min WNW 8.9 G 25 59°F 1014.6 hPa56°F
46239 - Point Sur, CA (157) 36 mi40 min 59°F7 ft
46114 - West Monterey Bay, CA 48 mi40 min 60°F6 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Salinas, Salinas Municipal Airport, CA11 mi73 minNW 1410.00 miFair72°F55°F57%1014.8 hPa
Monterey Regional Airport, CA20 mi72 minVar 610.00 miFair78°F55°F45%1015.4 hPa

Link to 5 minute data for KSNS

Wind History from SNS (wind in knots)
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Last 24hrNW14NW14NW13NW12NW11NW9NW7NW6NW6NW6W4CalmCalmSE5E4S4SE4SE5S3CalmNW3NW11NW14N15
1 day agoNW12NW11NW14NW12NW10NW9NW8N7NW6NW6NW6NW3Calm3NE4SE4SE4CalmSE3W33NW7NW12NW13
2 days agoNW13NW13NW10NW10NW13NW9W12W11W11W11W12NW9NW9NW6NW6W9W6SW6NW4NW3N6NW8NW11NW14

Tide / Current Tables for Monterey, Monterey Harbor, California (3)
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Monterey
Click for Map
Sun -- 02:35 AM PDT     3.97 feet High Tide
Sun -- 06:20 AM PDT     Sunrise
Sun -- 08:59 AM PDT     1.40 feet Low Tide
Sun -- 11:56 AM PDT     Moonset
Sun -- 03:27 PM PDT     4.74 feet High Tide
Sun -- 08:04 PM PDT     Sunset
Sun -- 10:06 PM PDT     2.02 feet Low Tide
Sun -- 11:33 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.23.63.93.93.73.22.621.61.41.62.12.93.74.34.74.74.43.83.22.62.222.1

Tide / Current Tables for Monterey, Monterey Harbor, California (2)
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Monterey
Click for Map
Sun -- 02:35 AM PDT     4.00 feet High Tide
Sun -- 06:20 AM PDT     Sunrise
Sun -- 08:58 AM PDT     1.34 feet Low Tide
Sun -- 11:56 AM PDT     Moonset
Sun -- 03:36 PM PDT     4.33 feet High Tide
Sun -- 08:04 PM PDT     Sunset
Sun -- 10:00 PM PDT     1.87 feet Low Tide
Sun -- 11:33 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.23.63.943.73.22.51.91.51.31.522.63.33.94.34.343.52.92.421.92

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 (17,4,5,8)
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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 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.