Monday, August20, 2018 L-36.com


Marine Weather and Tides
Davenport, CA

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Sunrise 6:28AMSunset 7:53PM Monday August 20, 2018 12:00 AM PDT (07:00 UTC) Moonrise 3:07PMMoonset 12:31AM Illumination 64% Phase: Waxing Gibbous; Moon at 9 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 Pigeon Point To Point Pinos To 10 Nm- 857 Pm Pdt Sun Aug 19 2018
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 3 to 4 ft at 8 seconds and S 3 ft at 14 seconds. Patchy fog after midnight.
Mon..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 8 seconds. Patchy fog in the morning.
Mon night..NW winds 10 kt. Wind waves 2 ft or less. NW swell 4 ft at 8 seconds. Patchy fog after midnight.
Tue..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 ft at 9 seconds. Patchy fog.
Tue night..SW winds 10 kt. Wind waves 2 ft or less. NW swell 2 to 3 ft at 8 seconds. Patchy fog after midnight.
Wed..W winds 10 kt. Wind waves 2 ft or less. W swell 2 to 4 ft. Patchy fog.
Thu..NW winds 10 kt. Wind waves 2 ft or less. NW swell 2 to 4 ft. Patchy fog.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft. Patchy fog.
PZZ500 857 Pm Pdt Sun Aug 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A thermal trough along the california coast will maintain relatively light to moderate northwest winds across the coastal waters through midweek. Strongest winds are expected over the northern outer waters through Monday afternoon. In addition, onshore westerly winds will be breezy through the golden gate each afternoon. Light to moderate mixed northwest and southerly swell will persist through the rest of the weekend.


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 200518
afdmtr
area forecast discussion
national weather service san francisco bay area
1018 pm pdt Sun aug 19 2018

Synopsis An upper level trough will move into northern
california tonight which will bring cooler temperatures to our
entire region during the first half of the work week. A slight
rebound in temperatures is expected late in the week.

Discussion As of 09:30 pm pdt Sunday... A 581dm 500mb upper
level disturbance has dug southeastward into the pacific northwest
through the course of the day and is now centered over eugene
oregon. The broad ridge residing over the desert southwest has
yielded the northern half of california to the encroaching low
from the north which ushered in a tangible shift in the regional
weather throughout our forecast area today. Temperatures generally
reported 3 to 10 degrees cooler today versus yesterday in
response to weakening pressure and cooler air aloft. Satellite
imagery indicates that a rather dry air mass is accompanying the
base of this trough and has scoured out the marine layer from cape
mendocino southward to point reyes and will bring a less robust
marine layer for the northern counties tonight.

While the initial vorticity wave responsible for digging this
trough into northern california is progged to be ejected from the
base of the trough by midday tomorrow, the broader parent trough
will stubbornly remain in place over northern california pacnw
through midweek. A secondary vorticity wave, currently over
central british columbia, will rapidly descend southward through
the lee of the trough, reaching the base of the trough by midday
Tuesday. As this occurs, the trough will briefly intensify and
push slightly farther southward, bringing in cooler air and
weaker pressure aloft. The marine layer should also rebound and
deepen for Monday night into Tuesday morning after becoming
slightly less robust tonight. Thus, Tuesday is forecast to be the
coolest day of the upcoming week. Coastal and shoreline
communities will see temperatures in the upper 50s to 60s, with
70s for inland valleys, which is several degrees cooler than
seasonal average temperatures. Extreme inland location will see
much warmer readings in the 80s, which is near to slightly above
seasonal average temperatures. The warmest isolated, inland
locations will reach the low 90s. Locally increased onshore winds
through low lying coastal gaps is also expected as the onshore
gradient tightens.

The upper low evacuates from the broader norcal pacnw region late
Wednesday into Thursday. The desert southwest ridge will attempt
to backbuild into california late this week, however, the ridge
will be thwarted by the presence of two broad upper lows in
proximity of the golden state (a trough over the vancouver area
and a cutoff low 1000 miles west of california). As such, the san
francisco and monterey bay areas will be somewhat in the center of
3 weak features, none of which will be able to singularly
dominate the local weather pattern. This will lead to a return to
near seasonal conditions for the area, meaning a slight warming
trend (to bring us closer to normal) near the coast, with
generally light winds, and mostly clear skies sans the typical
summer morning stratus.

Aviation As of 10:18 pm pdt Sunday... Aside from coastal
lifr vlifr due to a mix of low stratus ceilings, fog, smoke and
haze spreading inland tonight and Monday morning other impacts
include reduced slant range visibilities and inland horizontal
visibilities MVFR ifr at times. Additional smoke has been
entrained in northwesterly coastal winds originating from
wildfires over far northern california and the pacific northwest
and based on the aug 19th 18z high-resolution rapid refresh model
smoke is forecast to reach the bay area by later Monday and Monday
night; along with night and morning stratus and fog, slant range
visibilities are likely to remain moderate to poor into Tuesday.

Vicinity of ksfo... It'll be hazy with a lighter westerly wind mid
evening into Monday morning. Low to moderate confidenceVFR holds
until eventually transitioning to ifr beginning 12z and lasting
to 17z Monday. Restricted slant range visibility for the period.

Sfo bridge approach... Moderate to poor slant range visibility for
the period. Otherwise similar to ksfo.

Monterey bay terminals... Ifr lifr spreading inland early-mid evening,
lifr vlifr late tonight and Monday morning. Hazy conditions likely
lingering through Monday, stratus CIGS mixing out by late Monday
morning.

Marine As of 8:57 pm pdt Sunday... A thermal trough along the
california coast will maintain relatively light to moderate
northwest winds across the coastal waters through early next week.

Strongest will are expected over the northern outer waters
through at least Monday afternoon. In addition, onshore westerly
winds will be breezy through the golden gate each afternoon. Light
to moderate mixed northwest and southerly swell will persist
through the rest of the weekend.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt arena to pt reyes 0-10 nm until 4 am
public forecast: drp
aviation: canepa
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 mi70 min N 7.8 G 9.7 57°F 57°F5 ft1012.8 hPa (+0.3)
46092 - MBM1 20 mi35 min W 3.9 56°F 59°F1012.7 hPa (+0.0)
46114 - West Monterey Bay, CA 21 mi30 min 58°F5 ft
ELXC1 - Elkhorn Slough Reserve, CA 28 mi75 min SSW 2.9 56°F 1013 hPa55°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 31 mi39 min 58°F2 ft
MEYC1 32 mi84 min S 1.9 G 5.1 56°F 59°F1013.8 hPa
RTYC1 - 9414523 - Redwood City, CA 34 mi30 min NNW 4.1 G 4.1 59°F 73°F1012.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 43 mi70 min WNW 9.7 G 12 60°F 59°F6 ft1013.1 hPa (-0.0)
46239 - Point Sur, CA (157) 46 mi30 min 59°F5 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA22 mi67 minSE 36.00 miFog/Mist56°F54°F93%1013.3 hPa

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Last 24hrCalmCalmCalmCalmCalmW3CalmCalmCalmCalmS7S8SW6S8SW8SW9SW8S7SW7S5S5E3SE3Calm
1 day agoCalmCalmCalmCalmCalmSE3SE3CalmN3E3S76SW10SW5SW9W7SW8W5W5CalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmN3N3CalmCalmCalm3S5S8SW8SW8SW9SW8SW9SW7SW5SW3S4SW3CalmCalm

Tide / Current Tables for Santa Cruz, Monterey Bay, California
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Santa Cruz
Click for Map
Mon -- 01:30 AM PDT     Moonset
Mon -- 01:40 AM PDT     0.50 feet Low Tide
Mon -- 06:29 AM PDT     Sunrise
Mon -- 08:23 AM PDT     3.44 feet High Tide
Mon -- 12:48 PM PDT     2.58 feet Low Tide
Mon -- 04:05 PM PDT     Moonrise
Mon -- 07:07 PM PDT     5.12 feet High Tide
Mon -- 07:52 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.60.50.81.42.12.73.23.43.43.22.92.72.62.83.23.84.44.95.154.43.62.6

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Mon -- 01:11 AM PDT     0.55 feet Low Tide
Mon -- 01:31 AM PDT     Moonset
Mon -- 06:30 AM PDT     Sunrise
Mon -- 08:02 AM PDT     3.61 feet High Tide
Mon -- 12:55 PM PDT     2.74 feet Low Tide
Mon -- 04:07 PM PDT     Moonrise
Mon -- 06:43 PM PDT     5.04 feet High Tide
Mon -- 07:54 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80.60.71.11.62.333.43.63.53.332.82.72.93.43.94.54.954.743.12

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 (3,6,7,8)
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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.