Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Davenport, CA

Version 3.4
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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 6:27AMSunset 7:55PM Tuesday August 20, 2019 3:26 AM PDT (10:26 UTC) Moonrise 9:52PMMoonset 10:06AM Illumination 77% Phase: Waning Gibbous; Moon at 19 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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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 259 Am Pdt Tue Aug 20 2019
.small craft advisory in effect from noon pdt today through this evening...
.small craft advisory in effect from Wednesday afternoon through Wednesday evening...
Today..NW winds 10 to 15 kt, increasing to 15 to 25 kt with gusts up to 30 kt this afternoon. Wind waves around 4 ft this morning. W swell around 2 ft at 15 seconds, becoming nw 3 to 4 ft at 9 seconds this afternoon.
Tonight..NW winds 10 to 20 kt with gusts up to 30 kt. NW swell 4 to 6 ft at 10 seconds. Patchy fog.
Wed..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 14 seconds. Patchy fog.
Wed night..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 4 to 6 ft at 13 seconds and sw around 2 ft at 20 seconds. Patchy fog.
Thu..NW winds 15 to 20 kt with gusts up to 30 kt. Wind waves 1 to 2 ft. W swell 5 to 6 ft at 11 seconds and sw around 2 ft at 20 seconds. Patchy fog.
Thu night..NW winds 10 to 15 kt. W swell 5 to 6 ft at 10 seconds and sw around 2 ft at 18 seconds. Patchy fog.
Fri..S winds 5 to 10 kt. NW swell 4 to 6 ft and sw around 2 ft. Patchy fog.
Sat..W winds 5 to 10 kt. NW swell 3 to 5 ft and sw around 2 ft. Patchy fog.
PZZ500 259 Am Pdt Tue Aug 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the eastern pacific will maintain generally light to moderate northwesterly winds over the coastal waters through mid-week. Locally gusty coastal jets south of point arena, pigeon point and point sur will create hazardous conditions for small vessels. Breezy winds are also forecast for san francisco bay around the golden gate and through the delta, and over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.


7 Day Forecast for Marine Location Near Davenport, CA
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location: 37.01, -122.2     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 200640
afdmtr
area forecast discussion
national weather service san francisco bay area
1140 pm pdt Mon aug 19 2019

Synopsis A deep marine layer will prevail through today,
maintaining widespread morning low clouds and cooler than normal
inland temperatures. Warmer temperatures will develop by midweek
and continue through the upcoming weekend as high pressure
rebuilds.

Discussion As of 9:25 pm pdt Monday... A deep marine layer
allowed cooler air to reach the inland and mountain areas today
where highs were about 5 degrees cooler than yesterday. Low clouds
were late to burn off around the bay area today and highs were a
couple of degrees below normal.

Not much change on Tuesday as the deep marine layer persists. By
Wednesday the upper level ridge over the southwest starts to
build and extend westward towards southern california. At this
time an unseasonably strong low pressure system will be moving
northeast across the pacific northwest waters into western canada.

While 500 mb heights do not change much over our district... The
airmass warms at the lower levels with 850 mb temps climbing about
3 degrees c from Wednesday 00z through Friday 00z. This translates
to a combined 4 to 8 degrees of warming for Wednesday and
Thursday. Inland areas will be well into the 90s on Thursday. The
marine layer will be compressed but should still keep the coastal
areas in the 60s to lower 70s with 80s around the bay.

Some cooling is expected Friday and Saturday as the upper ridge
breaks down. Medium range models are suggesting an upper high
moving over the state from the pacific. There is also the
potential for an uptick in tropical activity well to our south
along the baja california coast by early next week from a tropical
system. There still remains plenty of uncertainty this far out
but will have to keep tabs on any development as northbound
moisture transport to parts of the southern california coast and
possibly even the central california coast isn't completely out of
the question by early next week. Will also have to watch for this
tropical system enhancing the subsidence over our area which
could result in significant warming possibly a heatwave.

Aviation As of 11:00 pm pdt Monday... For 06z tafs. The marine
layer is gradually filling in at this hour and is expected to be
widespread by morning. MVFR to ifr CIGS anticipated to impact
most terminals overnight. Low clouds are forecast to scatter out
between 18z-20z Tuesday morning. Light onshore flow around 5 to
10 kt will persist through the night.

Vicinity of ksfo... MVFR CIGS will continue to fill in across area
terminals overnight with clearing anticipated around 18z-19z
Tuesday morning. West winds of around 10 kt will prevail overnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR to ifr CIGS will persist through
the night. Clearing is anticipated around 18z-20z Tuesday. West
winds of around 5 kt will prevail overnight.

Marine As of 9:00 pm pdt Monday... Generally light to moderate
northwesterly winds will persist over the coastal waters through
mid-week as high pressure off the california coast weakens and a
surface low develops offshore of the pacific northwest. Locally
gusty winds are expected to develop late tonight along the big sur
coast south of point sur. Breezy winds are also forecast for
tomorrow afternoon and evening over the inner coastal waters from
pigeon point to point pinos, over the northern san francisco bay
around the golden gate and through the delta, and over the
monterey bay. Mixed seas will continue with shorter period
northwest waves at around 8 to 10 seconds, a light longer period
west swell, and a light southerly swell.

Mtr watches warnings advisories
Tngt Sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am
public forecast: W pi
aviation marine: cw
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46042 - MONTEREY - 27NM West of Monterey Bay, CA 19 mi36 min NNE 12 G 16 61°F 61°F3 ft1015 hPa (+0.0)
46092 - MBM1 20 mi76 min NW 9.7 60°F 59°F1015.4 hPa (+0.6)
46114 - West Monterey Bay, CA 21 mi26 min 61°F3 ft
MLSC1 - Moss Landing, South Harbor, CA 26 mi62 min NNE 2.9 G 12 60°F 1016.1 hPa57°F
ELXC1 - Elkhorn Slough Reserve, CA 28 mi101 min ESE 1.9 60°F 1014 hPa58°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 31 mi26 min 62°F1 ft
MEYC1 32 mi50 min 62°F1016.1 hPa
RTYC1 - 9414523 - Redwood City, CA 34 mi56 min W 6 G 8 62°F 75°F1016.4 hPa
46239 - Point Sur, CA (157) 46 mi26 min 60°F4 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA22 mi93 minN 010.00 miOvercast60°F55°F86%1015.7 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrCalmCalmCalmS3SE3S3CalmCalm3SW6SW5W96W6W3SE4SE6E5E3NE4E3CalmCalmCalm
1 day agoW3SW4CalmSW5SW5SW4SW5SW9W9W11
G15
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2 days agoW64W5CalmW3W4W7W9W74SW9W12
G18
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5W7W7W5CalmSW3CalmSW4W3CalmW3

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
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Tue -- 01:30 AM PDT     4.08 feet High Tide
Tue -- 06:30 AM PDT     Sunrise
Tue -- 07:53 AM PDT     1.16 feet Low Tide
Tue -- 11:07 AM PDT     Moonset
Tue -- 02:20 PM PDT     4.57 feet High Tide
Tue -- 07:54 PM PDT     Sunset
Tue -- 08:37 PM PDT     1.85 feet Low Tide
Tue -- 10:52 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.7443.73.12.41.71.31.21.422.83.54.24.54.54.13.52.82.21.91.92.12.5

Tide / Current Tables for Santa Cruz, California
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Santa Cruz
Click for Map
Tue -- 01:24 AM PDT     4.07 feet High Tide
Tue -- 06:28 AM PDT     Sunrise
Tue -- 07:29 AM PDT     1.26 feet Low Tide
Tue -- 11:05 AM PDT     Moonset
Tue -- 02:25 PM PDT     4.57 feet High Tide
Tue -- 07:53 PM PDT     Sunset
Tue -- 08:24 PM PDT     1.95 feet Low Tide
Tue -- 10:51 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.8443.632.21.61.31.31.62.22.83.64.24.54.54.13.42.82.2222.22.7

Weather Map and Satellite Images
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wmap_P
GOES 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 (6,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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Disclaimer:
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.