Monday, June26, 2017 L-36.com


Marine Weather and Tides
Bonny Doon, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:49AMSunset 8:33PM Monday June 26, 2017 11:57 AM PDT (18:57 UTC) Moonrise 7:50AMMoonset 9:56PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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- 920 Am Pdt Mon Jun 26 2017
.small craft advisory in effect from 1 pm this afternoon to 9 pm pdt this evening...
Today..NW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. SWell sw 3 ft at 15 seconds.
Tonight..NW winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight. Wind waves 3 to 5 ft. SWell sw 3 ft at 15 seconds. Patchy fog after midnight.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. Mixed swell nw 2 ft at 10 seconds and sw 3 ft at 14 seconds. Patchy fog in the morning.
Tue night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 ft at 10 seconds and sw 3 ft at 14 seconds. Patchy fog after midnight.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 to 3 ft at 9 seconds. Patchy fog.
Thu..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 to 4 ft. Patchy fog.
Fri..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft. Patchy fog.
PZZ500 920 Am Pdt Mon Jun 26 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure remains located over the eastern pacific. Locally gusty winds are forecast along the immediate coast and in san francisco bay today. A dominant southerly swell will persist into Wednesday morning.

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 261829
afdmtr
area forecast discussion
national weather service san francisco bay area
1129 am pdt Mon jun 26 2017

Synopsis Onshore wind flow today will lead to cooler
conditions through Tuesday. Modest warming is expected during the
second half of the week, however highs will fall well short of
the recent heatwave.

Discussion As of 8:37 am pdt Monday... Completed a minor
forecast grid update to account for current sky cover which is
showing mostly clear conditions for santa cruz monterey and san
benito while a deep marine layer over the bay area allowed low
clouds to push into the far east bay valleys early this morning.

Onshore gradients are around 2 mb at this hour but winds out in
the delta are howling with travis afb currently sustained at 23 kt
from the southwest and gusting to 29 kt. This will keep a cool
onshore wind flow in place today into Tuesday as a weak shortwave
moves onshore near the oregon border. Still expect morning clouds
to slowly mix out and burn back to the coast.

Forecast for the upcoming work week looks benign and seasonable
with a zonal flow aloft in place. Expect seasonable daytime highs
through midweek then perhaps slight warming later in the week
before the next trough arrives Friday Saturday with a cooling
trend.

Prev discussion As of 3:00 am pdt Monday... Clouds mostly
cleared from our CWA later yesterday but satellite shows that they
have returned to san mateo county northward. Clouds are
continuing to stream to the southeast and will be down into
monterey county by sunrise. Patchy fog and drizzle can be expected
into the morning.

Synoptically the ridge of high pressure that had been overhead is
now well to the east while the onshore flow combined with a
moderate marine layer will lead to cooler conditions compared to
yesterday especially for spots away from the coast. Highs will
range from 60s near the water with mostly 70s to mid 80s inland.

In general, temperatures will be 3 to 6 degrees cooler compared to
Sunday. Similar conditions can be expected tonight into Tuesday.

By Wednesday a ridge of high pressure will rebuild into the
pacific and toward our region. This will lead to slight warming
into Thursday. Inland highs will return to the upper 70s to lower
90s with coastal spots in the 60s to the mid 70s. Those
temperatures will hold into early next week and possibly into the
following week.

Aviation As of 11:27 am pdt Monday... It's been extra challenging
to forecast stratus CIGS in the last 12-18 hours; a classic example
as to the sensitivities of marine based clouds interacting with area
topography and other finer scale waves propagating through the
atmosphere. This complexity, of course, greatly reduces forecast
confidence.

Similarly complex weather even at this late morning hour there is
an ongoing stratus feed into the bay area while a sharp stratus no
stratus line extends south from san mateo county. Area-wide dewpoint
temperatures are a couple degrees lower than sea surface temps which
should generate more coastal stratus and add to the stratus feed
entering the bay area today and tonight, and while the set-up is
similarly true along the north central coast, other influences by
local terrain, etc. Are causing the leading edge of the stratus
field to dissipate.

18z tafs for the bay area are geared toward ongoing MVFR CIGS with
occasional mixing causing CIGS to mix out to few-sct this afternoon
during maximum diurnal warming. All the while the marine layer is
deep near 3,000 feet and undergoing a mix of cooling warming at 925
mb; btw, this is a different solution as compared to yesterday's nam
run when it was showing cooling of 1c-2c at 925 mb level today.

Tonight's 925 mb temp change is more consistent with previous runs
indicating 2c-4c cooling south bay and north central coast.

Vicinity of ksfo... Thought is that stratus will continue to reach
the terminal with tempo sct 20z-24z today. Early return possible
this evening if stratus along the coast remains intact, onshore
winds and deep marine layer otherwise favorable for more stratus.

West wind gusts up to 20-25 knots most likely during maximum
afternoon warming.

Sfo bridge approach... Coordinated with cwsu, better chances forVFR
in the approach today and similarly this evening. Low confidence
regarding tonight's stratus coverage.

Monterey bay terminals...VFR. MVFR CIGS probable this evening then
MVFR prevailing through 18z Tuesday with a deep marine layer.

Marine As of 10:40 am pdt Monday... High pressure remains located
over the eastern pacific. Locally gusty winds are forecast along
the immediate coast and in san francisco bay today. A dominant
southerly swell will persist into Wednesday morning.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rww
aviation marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46092 - MBM1 18 mi51 min SW 3.9 62°F 58°F1016.7 hPa (+0.4)
46114 - West Monterey Bay, CA 23 mi58 min 59°F3 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 23 mi68 min 62°F 60°F3 ft1017.6 hPa (+0.7)
ELXC1 - Elkhorn Slough Reserve, CA 24 mi73 min WNW 8 67°F 1017 hPa59°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 28 mi37 min 60°F1 ft
MEYC1 30 mi82 min NW 5.1 G 6 59°F 60°F1017.6 hPa
RTYC1 - 9414523 - Redwood City, CA 35 mi40 min NNW 12 G 19 66°F 73°F1016.8 hPa
46239 - Point Sur, CA (157) 46 mi36 min 56°F3 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 47 mi68 min ESE 1.9 G 1.9 59°F 58°F3 ft1017.6 hPa (+0.7)

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA18 mi65 minSW 710.00 miFair72°F57°F61%1017 hPa

Wind History from WVI (wind in knots)
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Last 24hrSW8S7S5SW6S6S8SE5E5E5E6E6CalmN3NW3NW3NW3NW3NW3NW3NW3CalmCalm4SW7
1 day ago4SW74SW8SW7S7S8S5SE4E4SE4NE3E4E3E4NE3E3E6E4CalmCalmCalmS4S7
2 days agoSW8SW10SW11SW9
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6SW9SW6SW6SW5CalmW6W3CalmCalmCalmCalmSW3SW4S3CalmCalmS43

Tide / Current Tables for Santa Cruz, California
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Santa Cruz
Click for Map
Mon -- 05:50 AM PDT     Sunrise
Mon -- 06:48 AM PDT     -1.45 feet Low Tide
Mon -- 08:49 AM PDT     Moonrise
Mon -- 02:12 PM PDT     4.69 feet High Tide
Mon -- 06:57 PM PDT     2.52 feet Low Tide
Mon -- 08:31 PM PDT     Sunset
Mon -- 10:55 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.15.74.631.2-0.3-1.2-1.4-1-0.212.23.44.34.74.543.32.72.52.73.34.14.9

Tide / Current Tables for Santa Cruz, Monterey Bay, California (sub)
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Santa Cruz
Click for Map
Mon -- 05:50 AM PDT     Sunrise
Mon -- 07:03 AM PDT     -1.45 feet Low Tide
Mon -- 08:49 AM PDT     Moonrise
Mon -- 01:57 PM PDT     4.22 feet High Tide
Mon -- 06:42 PM PDT     2.29 feet Low Tide
Mon -- 08:31 PM PDT     Sunset
Mon -- 10:55 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.15.74.73.21.5-0-1-1.4-1.2-0.30.92.23.344.243.42.82.42.32.63.34.25

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (14,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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weather_mapweather_map weather_map

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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.