Thursday, April9, 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 6:37AMSunset 7:35PM Thursday April 9, 2020 4:26 PM PDT (23:26 UTC) Moonrise 8:51PMMoonset 6:59AM Illumination 96% Phase: Waning Gibbous; Moon at 17 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- 221 Pm Pdt Thu Apr 9 2020
Tonight..W winds up to 10 kt. Wind waves 1 to 2 ft. W swell 3 to 4 ft at 12 seconds and sw 2 to 3 ft at 15 seconds. A slight chance of showers.
Fri..W winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 4 ft at 11 seconds and sw 2 to 3 ft at 15 seconds.
Fri night..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 12 seconds and sw around 2 ft at 15 seconds.
Sat..W winds up to 10 kt. Wind waves 1 ft. W swell 3 to 4 ft at 9 seconds and sw around 2 ft at 14 seconds.
Sat night..W winds 5 to 10 kt. Wind waves 1 ft. W swell 3 to 4 ft at 8 seconds and sw around 2 ft at 14 seconds.
Sun..NW winds up to 10 kt. Wind waves 1 ft. W swell 3 to 4 ft at 8 seconds and sw around 2 ft at 13 seconds.
Sun night..NW winds 5 to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 9 seconds.
Mon..NW winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft and sw around 2 ft.
Tue..NW winds up to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft and sw around 2 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 221 Pm Pdt Thu Apr 9 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak surface low pressure circulation is leaving the southern outermost coastal waters and continues to move southward. Winds will be from the south over the coastal waters and from the east and southeast over the bays tonight, shifting to northwest Friday and becoming gusty over the weekend. Moderate northwest swell will persist through the rest of the week along with a long to moderate 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 092056 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 156 PM PDT Thu Apr 9 2020

SYNOPSIS. Isolated showers may linger south of the Bay Area into tonight with areas elsewhere remaining dry. A gradual warming trend will then begin tomorrow continuing through the weekend as high pressure slowly builds over the region and the upper low continues to push further inland. More seasonable temperatures and drier conditions will persist into at least early next week.

DISCUSSION. as of 01:56 PM PDT Thursday . Satellite imagery shows the region remains under cloudy skies as the upper low that gave us our most recent rainfall continues to spin over southern California. This pesky and persistent low has been very slow to exit the region keeping isolated showers mainly south of the Bay Area into this morning. Over the past 12 hours as much as an additional quarter of an inch of rain has fallen over the Santa Cruz and Santa Lucia Mountains. Forecast models show one last possible push of scattered showers across the region tonight, again most likely south of the Bay Area, before the upper low finally progresses southward and then inland into the southern United States.

For those who are curios, just about the entire Greater Bay Area over the past two weeks has seen above normal precipitation for this time of the year with some locations exceeding their entire April normal rainfall in just over a week. The Monterey Airport did so in a single day with 1.71" falling on April 5th. The normal April rainfall for the airport is 1.12". However, most of the area is still about 40 to 55 percent of normal for the water year so far. After a fairly wet and cooler start to April, conditions look to warm and dry out beginning tomorrow.

The upper low will finally move eastward as an upper ridge builds over the eastern Pacific. Most areas tomorrow away from the coast will be in the mid to upper 60s with some locations possibly reaching 70 degrees. Coastal areas can expect temperatures in the upper 50s to mid 60s. Gradual warming will continue through the weekend as the ridge slowly shifts closer to the west coast. More widespread low to mid 70s are expected across the interior for the latter half of the weekend and into early next week with some areas even a few degrees above seasonal normals. Looking into the longer term, the CPC 6-10 and 8-14 day outlooks both show California with above normal temperatures and below normal precipitation. Both GFS and ECMWF ensembles show dry conditions persisting into at least the middle of the month.

AVIATION. as of 11:08 AM PDT Thursday . for 18Z TAFs. Most airports reporting VFR-MVFR except very locally and briefly IFR, otherwise seeing improvement in ceilings and visibilities since early morning. Satellite imagery still showing a fair amount of clouds rotating east to west from the Sierra Nevada and Central Valley, also remnant low clouds from a southerly surge on the coastline. Not sure how well model output is handling boundary layer relative humidity and cloud cover which will be subject to a relatively drier continental influence as the wind flow is from the east. TAFs are otherwise near persistence, there may be another period of light rain developing from the East Bay to the South Bay and over the north Central Coast tonight and early Friday.

Vicinity of KSFO . Recent observations showing VFR with a higher ceiling since early morning. Low confidence on duration of east wind today, recent 5 minute obs show east wind at 8 knots. Wind shift to southwest or west possible in the late afternoon or evening.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR, light and variable winds except southeast up to 14 knots at KSNS. East winds generally decreasing to light and variable with light southeast winds tonight. A passing shower possible tonight and early Friday.

MARINE. as of 10:39 AM PDT Thursday . A weak surface low pressure circulation is located over the southern outermost coastal waters and continues to move southward. Winds will be from the south over the coastal waters and east to southeast over the bays today, shifting to northwest on Friday and becoming gusty over the weekend. Moderate northwest swell will persist through the rest of the week along with a long to moderate period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. NONE.



PUBLIC FORECAST: AS AVIATION: Canepa MARINE: Canepa

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MEYC1 23 mi116 min N 7 G 8 55°F 58°F1016.5 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 24 mi116 min 58°F2 ft
ELXC1 - Elkhorn Slough Reserve, CA 24 mi161 min SE 4.1 58°F 52°F
46092 - MBM1 33 mi178 min SSW 12 54°F 56°F1016.6 hPa (-1.3)
46239 - Point Sur, CA (157) 36 mi116 min 55°F6 ft

Wind History for Monterey, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Salinas, Salinas Municipal Airport, CA11 mi33 minSSE 910.00 miOvercast61°F48°F65%1016.4 hPa
Monterey Regional Airport, CA20 mi32 minNNW 810.00 miOvercast60°F50°F70%1017.3 hPa

Link to 5 minute data for KSNS

Wind History from SNS (wind in knots)
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Last 24hrNW7NW8NW9NW9NW9NW7W7NW6CalmN5N5NE4N4E3E3E3SE7SE13SE16SE14SE15SE13SE14S9
1 day agoW12
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W11W10W8W5W5SW5SW9W11N4E3SW4S3CalmS4NE3CalmW7W9NW10NW8NW9NW8NW10
2 days agoNW12
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W11NW11NW7NW4CalmW3CalmCalmCalmSE3CalmSE5SE4E5SE8SE9SE8SE5CalmCalmSE3W13NW11

Tide / Current Tables for Monterey, Monterey Harbor, California
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Monterey
Click for Map
Thu -- 06:16 AM PDT     -0.50 feet Low Tide
Thu -- 06:41 AM PDT     Sunrise
Thu -- 08:00 AM PDT     Moonset
Thu -- 12:33 PM PDT     4.57 feet High Tide
Thu -- 06:06 PM PDT     1.06 feet Low Tide
Thu -- 07:37 PM PDT     Sunset
Thu -- 09:53 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.75.242.61.20.1-0.5-0.30.41.62.83.94.54.543.12.21.41.11.323.14.35.3

Tide / Current Tables for Elkhorn, California
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Elkhorn
Click for Map
Thu -- 12:03 AM PDT     5.69 feet High Tide
Thu -- 06:30 AM PDT     -0.40 feet Low Tide
Thu -- 06:40 AM PDT     Sunrise
Thu -- 07:59 AM PDT     Moonset
Thu -- 12:48 PM PDT     4.60 feet High Tide
Thu -- 06:17 PM PDT     1.15 feet Low Tide
Thu -- 07:36 PM PDT     Sunset
Thu -- 09:53 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.75.44.53.11.60.4-0.3-0.30.31.42.63.74.44.64.23.42.41.61.21.31.92.945

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 (19,4,5,8)
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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.