Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Pescadero, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:54AMSunset 7:30PM Wednesday March 29, 2017 12:11 PM PDT (19:11 UTC) Moonrise 7:16AMMoonset 8:36PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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- 855 Am Pdt Wed Mar 29 2017
.small craft advisory in effect through late Thursday night...
Today..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 12 ft at 16 seconds.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 8 to 10 ft at 15 seconds.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 8 to 9 ft at 14 seconds. Slight chance of showers in the morning.
Thu night..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. NW swell 9 to 12 ft at 14 seconds.
Fri..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 9 to 12 ft at 12 seconds.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 8 to 10 ft.
Sun..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. W swell 7 to 9 ft...increasing to 11 to 14 ft.
PZZ500 855 Am Pdt Wed Mar 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the california coast will keep moderate northwest winds through the day. Winds will briefly decrease tonight as the high weakens but will increase again Thursday through Friday as strong low pressure develops over the intermountain region.

7 Day Forecast for Marine Location Near Pescadero, CA
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location: 37.18, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 291727
afdmtr
area forecast discussion
national weather service san francisco bay area
1027 am pdt Wed mar 29 2017

Synopsis A gradual warming trend will continue through
today as high pressure builds over the region. Cooler and breezy
conditions return on Thursday as a cold front sweeps through the
region. While a few light rain showers will be possible, most
locations will remain dry. The ridge will then rebuild back over
the region late in the week resulting in another warming trend
heading into the upcoming weekend.

Discussion As of 08:57 am pdt Wednesday... Mainly clear skies
prevail over the region this morning with temperatures in the
mid/upper 40s to mid 50s as conditions begin to warm. Clouds
approaching northern california this morning ahead of an
approaching weather system may impact portions of the north bay
today, yet should have minimal effect on temperatures. Expect
afternoon temperatures to warm into the 70s and potentially lower
80s in the warmest inland spots with mid/upper 60s to lower 70s at
the coast. The ongoing forecast remains on track and no updates
are needed at this time. Please see the previous discussion below
for details on the weak system that will move through the region
late tonight and early tomorrow morning with potential for very
light precipitation.

Prev discussion As of 3:10 am pdt Wednesday... All signs point to
beautiful weather across our entire CWA today. Synoptically a
ridge of high pressure aloft will combine with warmer temperatures
at 925 mb and offshore flow at the surface to bring widespread
60s and 70s to the coast with 70s to lower 80s for inland
locations. Sunny conditions can also be expected along with
lighter winds than yesterday.

A system in the north pacific will dive to the southeast over the
next couple of days and move to eastern california/nevada on
Thursday. Showers associated with this feature will generally stay
to our east although a few sprinkles may occur especially over
the north and east bay hills. At the same time cooler air will
filter back in along with increasing gradients both at the surface
and aloft. Northwesterly winds will be on the increase through
the day with many spots forecast to see gusts over 25 mph. Coastal
locations should see the stronger winds with local gusts over 40
mph possible. Will allow the day crew to make the final call on
possible wind advisory. Temperatures will be considerably cooler
than today -- most spots will be 7 to 12 degrees lower.

The ridge of high pressure will quickly rebuild back into our
region starting on Friday and continue into the weekend. By
Saturday highs will be back to levels close to what we will see
today.

Another system will pass to our east by the end of the weekend
which will lead to temperatures being knocked down again going
into next work week. That will be followed by the ridge rebuilding
once again.

Finally, interesting to note that guidance continues to show a
return to wet weather starting around next Thursday as a system
moves in from the northwest that will have a moderate moisture tap
to use. Current ivt values favor around 250 kg/m/s although some
of the ensemble members have values over 500. Both the GFS and
ecmwf have widespread rainfall by next Friday. Still more than a
week down the road, however this potential change in the pattern
has been hinted at for quite a few days.

Aviation As of 10:30 am... Clear skies with light winds this
morning. Winds will increase in the afternoon as onshore gradients
tighten up. Models consistent in bringing low level moisture into
the area after 06z as a strong shortwave approaches the area.

This will translate into ifr CIGS over most terminals. Clearing
will take rapidly Thursday morning after the shortwave passes.

Vicinity of ksfo...VFR today with west winds to gusting to 25 kt
after 20z. Ifr CIGS after 06z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR today. Ifr after 06z.

Marine As of 08:57 am pdt Wednesday... High pressure off the
california coast will keep moderate northwest winds through the
day. Winds will briefly decrease tonight as the high weakens but
will increase again Thursday through Friday as strong low
pressure develops over the intermountain region.

Mtr watches/warnings/advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm until 3 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 pm
sca... Rough bar advisory for sf bar
sca... Mry bay from 3 pm
sca... Sf bay from 3 pm
public forecast: rgass
aviation: W pi
marine: W pi
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 24 mi42 min N 2.9 G 5.1 63°F 60°F1021.8 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 27 mi82 min 19 G 23 56°F 56°F10 ft1022.1 hPa (+0.0)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 29 mi82 min NW 19 G 23 55°F 56°F11 ft1022.6 hPa (+1.2)
46114 - West Monterey Bay, CA 32 mi42 min 56°F10 ft
46092 - MBM1 35 mi63 min W 9.7 54°F 55°F1021.2 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 41 mi42 min SW 1.9 G 2.9 61°F 60°F1022.7 hPa
PXSC1 43 mi42 min 59°F 53°F
OBXC1 43 mi42 min 58°F 53°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 43 mi42 min WSW 2.9 G 4.1
LNDC1 43 mi42 min WSW 4.1 G 5.1 62°F 1022.3 hPa
FTPC1 - 9414290 - San Francisco, CA 43 mi42 min WSW 8 G 13 58°F 57°F1022.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi42 min WNW 4.1 G 5.1 59°F 1022.4 hPa
46237 - San Francisco Bar, CA (142) 44 mi42 min 56°F8 ft
46240 - Cabrillo Point, Monterey Bay, CA (158) 46 mi51 min 58°F5 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 46 mi82 min NNW 18 G 21 54°F 53°F9 ft1023.1 hPa (+1.5)
MEYC1 48 mi42 min WNW 13 G 15 56°F 57°F1021.9 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA24 mi77 minNW 15 G 185.00 miFair with Haze57°F50°F77%1023 hPa

Wind History from HAF (wind in knots)
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Last 24hrN16
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N9N13SE5E3NW6N10
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Tide / Current Tables for Ano Nuevo Island, California
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Ano Nuevo Island
Click for Map
Wed -- 05:58 AM PDT     -0.10 feet Low Tide
Wed -- 06:58 AM PDT     Sunrise
Wed -- 08:15 AM PDT     Moonrise
Wed -- 12:16 PM PDT     4.72 feet High Tide
Wed -- 06:07 PM PDT     0.71 feet Low Tide
Wed -- 07:29 PM PDT     Sunset
Wed -- 09:35 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.24.73.72.310.2-0.10.21.12.23.34.24.74.63.92.91.91.10.711.72.83.94.9

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Wed -- 06:12 AM PDT     0.01 feet Low Tide
Wed -- 06:59 AM PDT     Sunrise
Wed -- 08:15 AM PDT     Moonrise
Wed -- 12:34 PM PDT     5.12 feet High Tide
Wed -- 06:22 PM PDT     0.82 feet Low Tide
Wed -- 07:30 PM PDT     Sunset
Wed -- 09:36 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.75.34.331.50.500.212.13.34.455.14.53.52.41.40.911.72.73.95

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 (15,3,4,5)
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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.