Friday, January19, 2018 L-36.com


Marine Weather and Tides
La Selva Beach, 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 7:16AMSunset 5:19PM Thursday January 18, 2018 9:51 PM PST (05:51 UTC) Moonrise 8:19AMMoonset 7:02PM Illumination 6% 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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PZZ535 Monterey Bay- 903 Pm Pst Thu Jan 18 2018
.small craft advisory in effect through Friday afternoon...
Tonight..W winds 10 to 20 kt. Wind waves 2 to 4 ft... Becoming 3 ft after midnight. W swell 13 to 16 ft at 17 seconds. Showers likely late in the evening, then chance of showers after midnight.
Fri..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 11 to 14 ft at 15 seconds. Slight chance of showers in the morning, then chance of showers and slight chance of Thunderstorms in the afternoon.
Fri night..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 9 to 12 ft at 14 seconds. Slight chance of showers.
Sat..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 7 to 9 ft at 15 seconds. Slight chance of showers in the morning.
Sat night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 7 to 9 ft at 14 seconds.
Sun..S winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft. Chance of rain.
Mon..NW winds 10 kt. Wind waves 2 ft or less. W swell 7 to 9 ft. Chance of rain, then slight chance of showers.
Tue..SW winds 5 kt. Wind waves 2 ft or less. W swell 5 to 7 ft. Slight chance of rain, then chance of rain.
PZZ500 903 Pm Pst Thu Jan 18 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A large, long period west swell will continue to impact the waters overnight and into Friday, bringing hazardous seas to the coastal waters. Additionally, the coastline will see large breaking waves and high surf associated with the large swell. A cold front will slowly pass through the waters through the evening and overnight hours, bringing with it a chance of rain.

7 Day Forecast for Marine Location Near La Selva Beach, CA
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location: 36.93, -121.85     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 190518
afdmtr
area forecast discussion
national weather service san francisco bay area
918 pm pst Thu jan 18 2018

Synopsis Light rain will continue to fall through late
Thursday evening as a cold front pushes through the region.

Showers will mostly end from north to south late Thursday night.

A slight chance of showers will continue on Friday as a cold upper
trough settles over the area and there is also a slight chance of
thunderstorms near the coast. A few lingering showers are
possible in coastal areas through Saturday morning, but otherwise
dry conditions are forecast for Saturday. The next system is due
to spread rain across the region Sunday and Sunday night.

Discussion As of 9:15 pm pst Thursday... Kmux radar currently
shows two bands of light rain associated with a cold front moving
through our area. One band is extends from the east bay southwest
through northern monterey county while a second band is pressing
through the north bay. Rainfall amounts with this system so far have
mostly been about a quarter inch or less, but local amounts of a
half to three-quarters of an inch have accumulated from the santa
cruz mountains northward. Nearly an inch has fallen at mount
tamalpais in marin county. Additional rainfall overnight is
expected to be a quarter inch or less.

Both the 00z NAM and 00z GFS indicate that rainfall will end from
north to south overnight as the front pushes to the south of our
area. Both models also agree that post-frontal showers associated
with the cold upper trough on Friday will be confined almost
entirely to our coastal waters. Have therefore reduced rain
chances for tomorrow in a forecast update that was completed
earlier this evening.

Lightning strikes have been detected off the northern california
coast since this afternoon. Models show increasing instability
over our coastal waters overnight and into Saturday, as well as
across coastal land areas. Will keep slight thunderstorms chances
in the forecast for these areas late tonight and tomorrow.

However, given latest model guidance it appears that thunderstorm
development for areas over land is highly unlikely.

The upper trough is forecast to move inland by Saturday morning
and precipitation chances are expected to end in most areas. A few
lingering showers may continue in southern coastal areas on
Saturday morning. But for the most part Saturday is expected to
be a partly cloudy, dry, and cool day.

The cool airmass that will settle across our area by tomorrow
will result in chilly nights starting tomorrow night, especially
in areas that see clearing. Look for temperatures to drop down
close to freezing in the inland valleys by early Saturday morning.

The next system dropping in from the northwest is forecast to
sweep across our area Sunday and Sunday night. The models disagree
somewhat on the timing of precip onset with the 00z NAM bringing
rain into the north bay as early as sunrise Sunday morning, while
the 00z GFS lags the NAM by about six hours. The 12z ECMWF is
even slower. In any case, the Sunday Sunday night system is
forecast to move through rather quickly and rainfall totals are
projected to be similar to what the current system is generating,
except possibly higher amounts in the north bay.

The pattern is forecast to remain active with another system due
in around the middle of next week.

Aviation As of 4:00 pm pst Thursday... For 00z tafs. MVFR to
vfr CIGS anywhere from 1000 ft to 4000 ft will continue through
tonight as rain showers continue through much of the forecast
period. CIGS will be jumping between categories as showers move
across area terminals. West winds of 10 kt or less will prevail.

Vicinity of ksfo... MVFR CIGS will prevail across area terminals as
showers continue to move across the region. Showery conditions
will persist through much of the forecast period therefore have
kept -shra and vcsh in the forecast. West winds around 10 kt.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR toVFR CIGS will prevail across
area terminals as showers continue to move across the region.

Showery conditions will persist through much of the forecast
period therefore have kept -shra and vcsh in the forecast. Light
winds.

Marine As of 2:06 pm pst Thursday... A large, long period west
swell will continue to impact the waters overnight and into
Friday, bringing hazardous seas throughout the coastal waters.

Additionally, the coastline will see large breaking waves and
high surf associated with the large swell. A cold front will
slowly pass through the waters through the evening and overnight
hours, bringing with it a chance of rain.

Mtr watches warnings advisories
Tngt High surf warning... Entire coast
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
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
sca... Mry bay
public forecast: dykema
aviation: cw
marine: rowe
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 10 mi67 min NW 11 54°F 1018 hPa54°F
46092 - MBM1 16 mi157 min W 16 55°F 57°F1017.9 hPa (-0.0)
46240 - Cabrillo Point, Monterey Bay, CA (158) 21 mi61 min 57°F7 ft
MEYC1 23 mi76 min WSW 7 G 9.9 53°F 58°F1018.9 hPa
46114 - West Monterey Bay, CA 30 mi52 min 57°F17 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 31 mi62 min WNW 12 G 16 55°F 56°F18 ft1018.3 hPa (+1.0)
46239 - Point Sur, CA (157) 43 mi52 min 57°F15 ft
RTYC1 - 9414523 - Redwood City, CA 44 mi52 min SW 1.9 G 7 52°F 56°F1018.3 hPa (+0.9)

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA3 mi59 minWSW 58.00 miLight Rain54°F0°F%1018 hPa
Hollister, CA, CA23 mi57 minWSW 96.00 miFog/Mist54°F51°F94%1018.3 hPa
Salinas, Salinas Municipal Airport, CA23 mi59 minW 104.00 miLight Rain Fog/Mist54°F53°F97%1019.3 hPa
Monterey Regional Airport, CA23 mi58 minWSW 64.00 miLight Rain Fog/Mist53°F53°F100%1020.1 hPa

Wind History from WVI (wind in knots)
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Last 24hrN3NW4CalmN3NW4W3NW4NW4CalmW5NE3Calm3CalmCalm3SW53S8SW4W7SW10SW8
G18
SW5
1 day agoCalmCalmE3CalmCalmCalmW3CalmN3W3CalmCalmE3CalmSW8SW63S5S6S4CalmW3CalmCalm
2 days agoNW3NW4NW4N3CalmCalmCalmCalmW4N3CalmN3CalmNE3--------W3CalmCalmCalmCalmCalm

Tide / Current Tables for Elkhorn Slough railroad bridge, Monterery Bay, California
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Elkhorn Slough railroad bridge
Click for Map
Fri -- 12:38 AM PST     4.32 feet High Tide
Fri -- 05:08 AM PST     2.52 feet Low Tide
Fri -- 07:17 AM PST     Sunrise
Fri -- 08:55 AM PST     Moonrise
Fri -- 11:50 AM PST     5.48 feet High Tide
Fri -- 05:18 PM PST     Sunset
Fri -- 06:26 PM PST     0.03 feet Low Tide
Fri -- 07:58 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.24.33.93.42.82.52.73.23.84.555.45.55.24.33.11.80.70.10.10.61.42.43.3

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Fri -- 02:16 AM PST     -0.00 knots Slack
Fri -- 04:28 AM PST     -0.47 knots Max Ebb
Fri -- 07:17 AM PST     Sunrise
Fri -- 07:40 AM PST     0.00 knots Slack
Fri -- 08:55 AM PST     Moonrise
Fri -- 10:31 AM PST     0.46 knots Max Flood
Fri -- 01:15 PM PST     -0.00 knots Slack
Fri -- 04:37 PM PST     -0.86 knots Max Ebb
Fri -- 05:19 PM PST     Sunset
Fri -- 07:59 PM PST     Moonset
Fri -- 08:25 PM PST     0.00 knots Slack
Fri -- 11:25 PM PST     0.65 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.40.1-0.2-0.4-0.4-0.3-0.10.10.30.40.40.30.1-0.2-0.6-0.8-0.8-0.7-0.4-0.10.20.50.6

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 (0,6,7,8)
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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.