Thursday, April26, 2018 L-36.com


Marine Weather and Tides
Rio del Mar, CA

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 6:17AMSunset 7:53PM Wednesday April 25, 2018 11:00 PM PDT (06:00 UTC) Moonrise 2:35PMMoonset 3:09AM Illumination 83% Phase: Waxing Gibbous; Moon at 11 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- 831 Pm Pdt Wed Apr 25 2018
Tonight..W winds 10 kt. Wind waves 2 ft or less. W swell 3 to 5 ft at 13 seconds.
Thu..W winds 10 kt...increasing to 10 to 20 kt in the afternoon. Wind waves 2 ft or less...becoming 3 ft in the afternoon. W swell 3 to 4 ft at 12 seconds.
Thu night..W winds 10 to 20 kt. Wind waves 3 ft in the evening...becoming 2 ft or less. W swell 3 ft at 12 seconds.
Fri..W winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 ft at 16 seconds.
Fri night..W winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 3 to 4 ft at 15 seconds.
Sat..W winds 10 to 20 kt. Wind waves 2 to 4 ft...becoming 2 ft or less. W swell 3 to 5 ft.
Sun..W winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 3 to 4 ft.
Mon..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft.
PZZ500 831 Pm Pdt Wed Apr 25 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will remain generally light over the coastal waters overnight, though locally breezy conditions could develop near coastal gaps or prominent points during the day on Thursday. Light to moderate seas will continue through the forecast period with a mixed south and northwest swell developing late in the week.

7 Day Forecast for Marine Location Near Rio del Mar, CA
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location: 36.96, -121.9     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 260545
afdmtr
area forecast discussion
national weather service san francisco bay area
1045 pm pdt Wed apr 25 2018

Synopsis A cooling trend will continue through the end of the
week as an upper low slowly approaches the northern california
coast. Areas of drizzle or light rain are possible in coastal
areas late Thursday night and again Friday night. There is also a
slight chance of showers Friday night into Saturday for the far
northern portions of the north bay as the upper low finally pushes
inland to our north. Dry conditions along with a slight warming
trend appears likely early next week.

Discussion As of 8:55 pm pdt Wednesday... An upper low centered
about 500 miles west of point arena this evening is drifting
slowly eastward. This low has already had an impact on our weather
by cooling us off over the past few days. Over the weekend our
temperatures were ten degrees or more above normal, but by today
most locations had cooled to near normal or as much as five
degrees below normal. The marine layer has deepened to about 2000
feet, and further marine layer deepening is likely over the next
few days as the low continues to move slowly eastward. This will
mean continued cooling through the end of the week, especially for
inland areas.

In addition to cooling, the approach of the upper low will also
result in light precipitation chances. First, very light rain or
drizzle is possible in coastal areas late Thursday night and
Friday morning as a shortwave trough rotating around the low
approaches the coast and interacts with the deep moist boundary
layer. Then, as the upper low approaches the ca or border on
Friday night, light rain or drizzle is possible once again in
coastal areas. In addition, there is a slight chance of shower
activity Friday night and Saturday across northern sonoma county
and northern napa county, which will be in close enough proximity
to the upper low. Rainfall totals through Saturday are not likely
to reach a tenth of an inch in any one location, and most of our
forecast area will likely remain dry. A forecast update was
completed earlier this evening to add light rain chances to
coastal areas late Thursday night into Friday morning and again
late Friday night into Saturday morning.

The upper low will move well inland by late in the weekend, but
then a weak and dry system is forecast to drop in from the north
which will keep temps cool into the early part of next week.

Temperatures are not expected to warm back to normal until about
the middle of next week.

Aviation As of 10:45 pm pdt Wednesday... Lower level cooling
is continuing to lift and weaken the marine layer inversion. A
negative tilt, amplifying mid level trough arrives Thursday night
which should further weaken and mix out the marine layer. Forecast
confidence in the 06z tafs is low to slightly more than moderate
on ceiling bases, timing and duration.

Vicinity of ksfo... Westerly wind 5 to 10 knots tonight.VFR MVFR
tonight,VFR returns by late Thursday morning. Gusty westerly winds
Thursday afternoon near 20 knots.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR tonight into Thursday morning,VFR returns
by late Thursday morning.

Marine As of 8:31 pm pdt Wednesday... Winds will remain generally
light over the coastal waters overnight, though locally breezy
conditions could develop near coastal gaps or prominent points
during the day on Thursday. Light to moderate seas will continue
through the forecast period with a mixed south and northwest swell
developing late in the week.

Mtr watches warnings advisories
Tngt None.

Public forecast: dykema
aviation: canepa
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 13 mi76 min NW 5.1 53°F 1019 hPa49°F
46092 - MBM1 16 mi56 min WNW 5.8 53°F 53°F1018.4 hPa (+0.8)
46240 - Cabrillo Point, Monterey Bay, CA (158) 23 mi40 min 56°F3 ft
MEYC1 25 mi85 min WSW 1.9 G 5.1 54°F 57°F1018.8 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 29 mi71 min W 5.8 G 9.7 53°F 57°F5 ft1018.2 hPa (+0.7)
46114 - West Monterey Bay, CA 29 mi61 min 56°F6 ft
RTYC1 - 9414523 - Redwood City, CA 41 mi43 min WNW 8 G 8 54°F 67°F1018.2 hPa
46239 - Point Sur, CA (157) 44 mi31 min 55°F6 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA6 mi68 minN 09.00 miFair51°F46°F86%1018.8 hPa

Wind History from WVI (wind in knots)
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Last 24hrSW4SW3CalmN3CalmCalmCalmSW3S3CalmCalm4S5SW8W8S11SW9SW6SW8SW7W5CalmCalmCalm
1 day agoCalmCalmCalmCalmCalmE4CalmCalmW3CalmSE4S3SW7SW7SW8S10SW8SW8S9SW7SW3CalmCalmCalm
2 days agoCalmCalmNW3CalmCalmSW3CalmCalmCalmCalmCalmE3S9S9S8S10SW7SW8SW4SW5S4SW3SW3S4

Tide / Current Tables for Santa Cruz, Monterey Bay, California
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Santa Cruz
Click for Map
Thu -- 02:42 AM PDT     1.13 feet Low Tide
Thu -- 04:45 AM PDT     Moonset
Thu -- 06:19 AM PDT     Sunrise
Thu -- 08:32 AM PDT     4.57 feet High Tide
Thu -- 02:53 PM PDT     0.12 feet Low Tide
Thu -- 04:40 PM PDT     Moonrise
Thu -- 07:52 PM PDT     Sunset
Thu -- 09:19 PM PDT     5.08 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.71.81.31.21.52.33.244.54.543.12.110.30.10.51.32.53.74.654.94.3

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Thu -- 01:22 AM PDT     -0.69 knots Max Ebb
Thu -- 04:44 AM PDT     Moonset
Thu -- 04:49 AM PDT     0.00 knots Slack
Thu -- 06:19 AM PDT     Sunrise
Thu -- 07:45 AM PDT     0.65 knots Max Flood
Thu -- 10:32 AM PDT     -0.00 knots Slack
Thu -- 01:30 PM PDT     -0.78 knots Max Ebb
Thu -- 04:40 PM PDT     Moonrise
Thu -- 05:05 PM PDT     0.00 knots Slack
Thu -- 07:51 PM PDT     Sunset
Thu -- 08:09 PM PDT     0.78 knots Max Flood
Thu -- 11:06 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.7-0.7-0.6-0.30.10.40.60.60.50.2-0.2-0.6-0.8-0.8-0.7-0.4-00.40.70.80.70.50

Weather Map and Satellite Images
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wmap_P
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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Wind Forecast for San Francisco/Monterey Bay Area, CA (2,6,7,8)
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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.