Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Boulder Creek, 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 6:28AMSunset 7:53PM Sunday August 20, 2017 5:58 PM PDT (00:58 UTC) Moonrise 4:15AMMoonset 6:22PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 241 Pm Pdt Sun Aug 20 2017
Tonight..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 10 seconds. Patchy fog after midnight.
Mon..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 10 seconds. Patchy fog in the morning.
Mon night..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 9 seconds. Patchy fog after midnight.
Tue..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 4 ft at 12 seconds. Patchy fog in the morning.
Tue night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. Mixed swell nw 2 to 4 ft at 13 seconds and S 3 ft at 12 seconds.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 to 3 ft. SWell S 3 ft.
Thu..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 3 to 5 ft. SWell sw 3 ft.
Fri..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft.
PZZ500 241 Pm Pdt Sun Aug 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate northwest winds will continue subsiding this evening and overnight for the outer coastal waters. Typical breezy conditions are possible from the golden gate bridge to angel island through the evening hours. Winds are forecast to remain generally light for both Monday and Tuesday.

7 Day Forecast for Marine Location Near Boulder Creek, CA
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location: 37.13, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 202348
afdmtr
area forecast discussion
national weather service san francisco bay area
448 pm pdt Sun aug 20 2017

Synopsis Cooling will continue early this week as an upper
trough of low pressure becomes nearly stationary over the eastern
pacific. Coastal areas will see little in the way of change with
continued night and morning low clouds and patchy fog.

Discussion As of 2:00 pm pdt Sunday... Clouds have burned-off
from most of our CWA although still have a few patches near and
along the coast. Temperatures have been running close to
yeterday's numbers with most locations in the 60s and 70s at the
coast with 70s and 80s inland. Satellite shows widspread clouds
off the coast, and with the marine layer still over 2000 feet plus
the onshore gradient still around 2 mb west-to-east clouds will
return back to most of the same locations overnight.

For those planning on watching the eclipse (remember to get the
correct lenses) tomorrow morning, still looks like the farther
inland you are the better shot at seeing it starting at 9 am. The
big question remains how quickly the clouds will dissipate through
the morning hours. Feeling right now is the south bay through
santa clara valley will see mostly clear conditions around the
start while farther to the north stretching from san francisco to
oakland there will likely be clouds at first. However, the hope if
they will dissipate during the hour with good viewing before the
peak time. Most of our coastal locations will likely remain cloudy
all morning.

Outside of the eclipse, not much to talk about as we are going to
continue to see overnight clouds, clearing during the day, and
temperatures remaining cool the first part of the week followed by
a modest warming trend going into the weekend as a ridge of high
pressure rebuilds into our region. No chance of rain.

Aviation As of 4:47 pm pdt Sunday... A weak surface low 120 miles
west of santa cruz tilts southward with height to a mid level nearly
stationary and dry closed low near the channel islands. This low is
producing a solid southerly wind component through the stratus field
while an onshore pressure gradient from sfo-sac is present at 2.6 mb.

Wildfire smoke entrained into this low pressure circulation continues
to be present aloft. Convection along the sierra nevada will eventually
transform into mid level cloud debris drifting westward over the area
tonight. In all, it's a difficult TAF forecast package, but thinking
is that the stratus will reach into the north bay a little more quickly
than it does over to the east bay and south bay areas including the
bay side of the sf peninsula. Stratus will prob wrap around to ksns
earlier than it reaches kmry this evening.

Warming 925 mb level temperatures results in reinforcement and possibly
some compression of the marine layer depth tonight, thus ifr CIGS and
vsbys becoming increasingly likely tonight into Monday morning.VFR
should return by mid-late Monday morning with the last places to clear
out being the north bay and along the immediate coast of santa cruz
and san mateo counties.

Vicinity of ksfo... West wind near 15 knots this evening.VFR likely
holding much of the night, tempo ifr forecast 12z-16z Monday morning.

Vfr returns Monday. Hazy due to wildfire smoke affecting slant range
visibilities.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ifr CIGS redeveloping this evening.

Hazy due to wildfire smoke affecting slant range visibilities. Ifr
cigs tonight and Monday morning til approx 17z.

Eclipse Here are the times for the start, peak, and end of the
eclipse for Monday morning. The percent of obscuration for each
location is also listed.

Santa rosa... San francisco... Oakland... San jose... Monterey

Start... 9:01... ... ... .9:01... ... ... 9:02... ... 9:02... ... .9:02..

Peak... 10:15... ... ... 10:15... ... ..10:15... ..10:16... ... 10:16..

End... .11:37... ... ... 11:37... ... ..11:37... ..11:38... ... 11:38..

Obsur... .78%... ... ... ..76%... ... ... .76%... ... .74%... ... ..71%...

Marine As of 4:24 pm pdt Sunday... Moderate northwest winds
will continue subsiding this evening and overnight for the outer
coastal waters. Typical breezy conditions are possible from the
golden gate bridge to angel island through the evening hours.

Winds are forecast to remain generally light for both Monday and
Tuesday.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Pt arena to pigeon pt 10-60 nm until 9 pm
public forecast: bell
aviation: canepa
marine: rowe
eclipse: bell rowe
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46042 - MONTEREY - 27NM West of Monterey Bay, CA 25 mi68 min S 5.8 G 7.8 62°F 61°F6 ft1012.1 hPa (-1.0)
RTYC1 - 9414523 - Redwood City, CA 26 mi40 min NW 9.9 G 12 71°F 73°F1010.6 hPa
46114 - West Monterey Bay, CA 28 mi28 min 61°F6 ft
46092 - MBM1 30 mi56 min W 7.8 62°F 61°F1012.2 hPa (-0.7)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 35 mi68 min SE 7.8 G 9.7 61°F 62°F7 ft1011.7 hPa (-0.8)
ELXC1 - Elkhorn Slough Reserve, CA 36 mi73 min NNW 11 66°F 1012 hPa60°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 40 mi37 min 58°F3 ft
MEYC1 42 mi82 min S 14 G 18 65°F 58°F1011.3 hPa
AAMC1 - 9414750 - Alameda, CA 44 mi40 min W 7 G 12 67°F 69°F1012.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 46 mi40 min W 8.9 G 14 66°F 1010.9 hPa
LNDC1 46 mi40 min W 11 G 15 67°F 1011.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi40 min W 11 G 16
OBXC1 47 mi40 min 65°F 60°F
PXSC1 47 mi40 min 67°F 60°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi40 min WNW 8 G 12 65°F 1011.9 hPa
FTPC1 - 9414290 - San Francisco, CA 48 mi46 min W 6 G 9.9 62°F 63°F1012.4 hPa
46237 - San Francisco Bar, CA (142) 49 mi58 min 61°F4 ft

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA24 mi62 minN 1410.00 miFair75°F60°F60%1011.3 hPa

Wind History from NUQ (wind in knots)
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Last 24hrN11N12N8N7N8NE6NE43E6SE4S3S3SE4E3S34CalmN3N8N10N12NW13N12N14
1 day agoNW10NW7N5N5N7N6N6NE5N5CalmN3E3E3E3SE5NE3Calm6N8N9N9N11NW11
G17
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2 days agoNW9NW10NW7N5N7N6N6N8N6NE4NE5N5CalmN3N3CalmCalm3N6N8NW8NW11NW11NW10

Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
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Sun -- 03:57 AM PDT     -0.85 feet Low Tide
Sun -- 05:15 AM PDT     Moonrise
Sun -- 06:30 AM PDT     Sunrise
Sun -- 10:40 AM PDT     4.69 feet High Tide
Sun -- 03:54 PM PDT     1.95 feet Low Tide
Sun -- 07:22 PM PDT     Moonset
Sun -- 07:54 PM PDT     Sunset
Sun -- 09:49 PM PDT     6.07 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.31.70.3-0.6-0.9-0.50.31.42.63.84.54.74.33.52.72.122.33.14.15.15.96.15.6

Tide / Current Tables for Santa Cruz, California
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Santa Cruz
Click for Map
Sun -- 03:57 AM PDT     -0.88 feet Low Tide
Sun -- 05:14 AM PDT     Moonrise
Sun -- 06:29 AM PDT     Sunrise
Sun -- 11:05 AM PDT     4.75 feet High Tide
Sun -- 03:55 PM PDT     2.03 feet Low Tide
Sun -- 07:20 PM PDT     Moonset
Sun -- 07:52 PM PDT     Sunset
Sun -- 10:01 PM PDT     6.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.61.90.4-0.6-0.9-0.60.21.32.43.64.44.74.53.82.92.322.33455.86.15.8

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 (20,4,5,8)
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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.