Sunday, August18, 2019 L-36.com


Marine Weather and Tides
Bonny Doon, CA

Version 3.4
NOTICE
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 6:26AMSunset 7:57PM Sunday August 18, 2019 2:30 PM PDT (21:30 UTC) Moonrise 8:57PMMoonset 8:14AM Illumination 89% Phase: Waning Gibbous; Moon at 18 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- 153 Pm Pdt Sun Aug 18 2019
Rest of today..SW winds 5 to 10 kt. NW swell 3 to 5 ft at 9 seconds.
Tonight..NW winds 10 to 15 kt. NW swell 3 to 4 ft at 9 seconds.
Mon..NW winds 10 to 15 kt. Wind waves 3 to 4 ft. W swell 2 to 3 ft at 15 seconds.
Mon night..NW winds 10 to 15 kt. Wind waves around 4 ft. W swell around 2 ft at 15 seconds.
Tue..NW winds 15 to 25 kt with gusts up to 30 kt. NW swell 3 to 5 ft at 9 seconds.
Tue night..NW winds 10 to 20 kt with gusts up to 30 kt. NW swell 3 to 5 ft at 10 seconds.
Wed..NW winds 20 to 30 kt with gusts up to 40 kt. NW swell 4 to 6 ft.
Thu..NW winds 15 to 20 kt. W swell 4 to 6 ft and sw around 2 ft.
PZZ500 153 Pm Pdt Sun Aug 18 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to locally moderate northwest winds will continue across the coastal waters through mid week as high pressure weakens over the eastern pacific and a low pressure system develops off of british columbia. Locally gusty afternoon and evening winds can be expected in the northern san francisco bay around the golden gate and through the delta. The sea state will remain dominated by shorter period northwest waves at around 8 to 10 seconds along with a light southerly swell. Additionally, a lighter more moderate period west to northwest swell will affect the coastal waters through mid week.


7 Day Forecast for Marine Location Near Bonny Doon, CA
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location: 37, -122.12     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 182054
afdmtr
area forecast discussion
national weather service san francisco bay area
154 pm pdt Sun aug 18 2019

Synopsis A deep marine layer will prevail along the west coast
for the next 24 hours or so, with seasonal conditions prevailing
as well as some patchy drizzle possible during the late night and
early morning hours. A gradual warming trend will develop midweek
and continue through next weekend as higher pressure rebuilds over
northern california.

Discussion As of 01:45 pm pdt Sunday... Water vapor imagery
continues to show a trough of low pressure along the west coast
this afternoon. There are a series of weak disturbances moving
through this trough, with one moving inland across far northern
california at this time, and another along 140 north approaching
130 west. This first disturbance helped deepen the marine layer
overnight, with the fort ord profiler still showing the marine
layer around 3000 feet deep. Meanwhile, the visible satellite
imagery shows a nice little eddy spinning off our immediate coast,
approximately 40 miles west southwest of san francisco this
afternoon. Given the deep nature of the marine layer in
combination with this eddy producing upslope flow into the
northern monterey bay today, we had numerous reports of drizzle,
some of which was heavy enough to tip the rain gauges. Most
places only reported a hundredth of two, but a few locations
around santa cruz measured up to 0.08 inches. The marine stratus has
also been slow to pull back to the coast today, resulting in
inland areas running up to four degrees cooler than this time
yesterday, while coast areas are similar to or slightly warmer.

All in all, not expecting much change over the next 24 hours,
with a deep marine layer and more seasonal conditions prevailing.

We could even see more late night and early morning drizzle
possible, especially in the upslope areas of the northern monterey
bay once again.

High pressure will then gradually begin to build back across the
region by midweek and continue through next weekend. At this time,
believe that inland areas will likely see gradually warmer
conditions this week, with it not really affecting the coastal
areas until Thursday or Friday. This is in part due to some model
differences with the 12z GFS trying to lift one last disturbance
across the region on Thursday, which could help modify
temperatures and the marine layer a bit. This looks a little
suspect compared to the 12z ecmwf, which trends more in line with
the ensembles, with the ridge building faster. Either way, expect
warmer conditions to start to develop come Tuesday, with next
weekend potentially being significantly warmer across the region
once again. Palmer

Aviation As of 10:35 am pdt Sunday... For 18z tafs. The marine
layer remains fairly deep this morning at over 3,000 ft agl per
the fort ord profiler. Satellite imagery shows low clouds
beginning to dissipate over land while stratus remains offshore.

Most sites are currentlyVFR aside from ksts, kmry, and ksns.

Expecting clearing to occur within the next hour or so.VFR
conditions to then prevail for all sites into this evening before
stratus returns. Some compression of the marine layer is expected
tonight and tomorrow as high pressure gradually rebuilds over
texas. Overall, all the sites that saw low clouds into this
morning are expected to see MVFR to ifr conditions overnight
tonight. Variable to southerly winds this morning are forecast to
turn onshore by this afternoon at around 10-15 kt.

Vicinity of ksfo...VFR through late tonight before MVFR CIGS are
expected to develop. It is possible, however, that once again sfo
may be left only sct overnight. Light winds this morning expected
to increase and turn SW to W by this afternoon near 15 kt. Lighter
winds expected tonight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Satellite shows MVFR CIGS quickly
eroding.VFR conditions are expected over the next hour or so and
will then prevail through the afternoon. Guidance indicates another
early return of stratus this evening with MVFR to possibly ifr
conditions overnight and into tomorrow morning. Light winds this
morning will increase and turn onshore by this afternoon at around
10-15 kt.

Marine As of 01:54 pm pdt Sunday... Generally light to locally
moderate northwest winds will continue across the coastal waters
through mid week as high pressure weakens over the eastern
pacific and a low pressure system develops off of british
columbia. Locally gusty afternoon and evening winds can be
expected in the northern san francisco bay around the golden gate
and through the delta. The sea state will remain dominated by
shorter period northwest waves at around 8 to 10 seconds along
with a light southerly swell. Additionally, a lighter more
moderate period west to northwest swell will affect the coastal
waters through mid week.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
public forecast: palmer
aviation: as
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46092 - MBM1 18 mi70 min SSW 9.7 59°F 60°F1013.9 hPa (-0.4)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 21 mi40 min WSW 7.8 G 9.7 60°F 60°F5 ft1013.6 hPa (+0.3)
MLSC1 - Moss Landing, South Harbor, CA 22 mi21 min WSW 8 G 21 63°F 1014.4 hPa58°F
46114 - West Monterey Bay, CA 23 mi30 min 61°F5 ft
ELXC1 - Elkhorn Slough Reserve, CA 24 mi45 min WNW 8.9 67°F 1013 hPa59°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 28 mi30 min 58°F2 ft
MEYC1 30 mi54 min 58°F1014 hPa
RTYC1 - 9414523 - Redwood City, CA 35 mi42 min NW 4.1 G 8.9 72°F 76°F1012.1 hPa
46239 - Point Sur, CA (157) 45 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, CA18 mi97 minWSW 11 G 1510.00 miOvercast67°F55°F68%1014.3 hPa

Link to 5 minute data for KWVI

Wind History from WVI (wind in knots)
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Last 24hrW12
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5W7W7W5CalmSW3CalmSW4--CalmW3W3SW4----SW5SW4SW5SW9W9W11
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1 day ago--SW8W7--SW8W4--SW3--6SW4--W5W64--CalmW3W4W7W9W74SW9
2 days agoSW8--SW7W6S6----CalmSW3------CalmCalm------CalmCalmS4SW5SW8--W9

Tide / Current Tables for Santa Cruz, Monterey Bay, California
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Santa Cruz
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Sun -- 12:15 AM PDT     4.91 feet High Tide
Sun -- 06:27 AM PDT     Sunrise
Sun -- 06:53 AM PDT     0.48 feet Low Tide
Sun -- 09:14 AM PDT     Moonset
Sun -- 01:29 PM PDT     4.52 feet High Tide
Sun -- 07:11 PM PDT     2.24 feet Low Tide
Sun -- 07:55 PM PDT     Sunset
Sun -- 09:56 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.94.84.23.32.31.30.70.50.81.52.33.344.54.54.13.62.92.52.22.42.83.43.9

Tide / Current Tables for Santa Cruz, California
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Santa Cruz
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Sun -- 12:06 AM PDT     4.73 feet High Tide
Sun -- 06:27 AM PDT     Sunrise
Sun -- 06:39 AM PDT     0.43 feet Low Tide
Sun -- 09:14 AM PDT     Moonset
Sun -- 01:34 PM PDT     4.32 feet High Tide
Sun -- 06:55 PM PDT     2.20 feet Low Tide
Sun -- 07:55 PM PDT     Sunset
Sun -- 09:56 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.74.53.931.910.50.50.81.42.33.13.84.34.33.93.42.82.32.22.42.83.43.9

Weather Map and Satellite Images
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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 (17,4,5,8)
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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.