Tuesday, May22, 2018 L-36.com


Marine Weather and Tides
Rio del Mar, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:52AMSunset 8:16PM Tuesday May 22, 2018 8:32 PM PDT (03:32 UTC) Moonrise 12:28PMMoonset 1:12AM Illumination 58% Phase: First Quarter Moon; Moon at 8 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- 233 Pm Pdt Tue May 22 2018
Rest of today..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 ft or less. W swell around 3 ft at 10 seconds.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 ft or less. W swell around 3 ft at 10 seconds and sw up to 4 ft at 18 seconds. Areas of drizzle.
Wed..W winds 5 to 15 kt. Wind waves 2 ft or less. W swell around 3 ft at 10 seconds and sw up to 4 ft at 17 seconds. Areas of drizzle.
Wed night..W winds 5 to 10 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 12 seconds and sw up to 4 ft at 16 seconds.
Thu..SW winds 5 to 15 kt with gusts up to 25 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 12 seconds and sw up to 4 ft at 16 seconds.
Thu night..SW winds 5 to 15 kt with gusts up to 25 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 12 seconds and sw up to 3 ft at 15 seconds.
Fri..W winds 5 to 15 kt. Wind waves 2 ft or less. W swell 3 to 6 ft and sw up to 3 ft.
Sat..W winds up to 10 kt. Wind waves 2 ft or less. W swell 3 to 5 ft.
PZZ500 233 Pm Pdt Tue May 22 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light northwest winds are expected this evening and overnight, though locally breezy conditions are possible near the golden gate and angel island. Winds will become southerly by Thursday morning as a weak low pressure system approaches from the west. This low will bring a chance of showers Thursday through Friday night. A long period southwest swell will persist with a shorter period northwest swell through 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 230022
afdmtr
area forecast discussion
national weather service san francisco bay area
522 pm pdt Tue may 22 2018

Synopsis Cool weather and morning low clouds will continue
through most of the week with inland temperatures remaining below
normal for this time of year as a deep marine layer continues to
influence the region. A late season cold front will approach
california late Thursday into Friday bringing a slight chance of
showers to most of the area. Showers should end by Saturday
morning before a warming trend brings inland temperatures back to
near seasonal normals by Sunday.

Discussion As of 1:34 pm pdt Tuesday... Visible satellite
imagery shows this morning's low clouds have dissipated for inland
areas while much of the coast remains under broken to overcast
conditions. Late clearing has slowed this afternoon's warming,
keeping temperatures across the area about 5 degrees cooler than
this time yesterday. An upper low remains near las vegas, allowing
for breezy onshore winds to continue this afternoon with onshore
gradients still around 2.5 mb from sfo to sac. Expect low clouds
to redevelop this evening moving inland and down the valleys
overnight.

Despite some brief shortwave ridging over the eastern pacific
tomorrow, seasonably cool temperatures will continue with many
inland locations around 5 to 10 degrees below normal as we remain
under the influence of a deep marine layer. Expect afternoon highs
along the coast in the low 60s with inland areas reaching the low
70s.

An upper level low with an associated surface cold front will then
approach the area on Thursday. This will bring chances of showers
to the region Thursday night into Friday morning. QPF totals
remain light with most areas seeing a few hundredths to just over
a tenth of an inch. The highest amounts will likely be in the
north bay coastal hills where up to a quarter of an inch is
possible. For now, the main impact from this system would be for
the commute Friday morning when the bulk of the precipitation is
expected. The forecast was updated this afternoon to increase pops
and QPF across the region with higher QPF totals in the north bay
and other terrain favored locations along the coast.

Showers will remain a possibility through Saturday morning as the
core of the upper low slowly moves inland, but any remaining
showers would bring little if any additional accumulations. The
main impact will be continued unseasonably cool weather,
especially inland.

As the low continues to move east on Saturday, a modest warming
trend will occur starting Saturday afternoon through memorial day
as a ridge develops over the eastern pacific. Inland temperatures
will rebound to near seasonal normals by Sunday with more
widespread upper 70s in the afternoon. As warming continues on
Monday, some inland locations may even be slightly above normal
with widespread afternoon highs forecast in the 80s.

Aviation As of 5:00 pm pdt Tuesday for 00z tafs... A familiar
story this past week with a deep marine layer and a moderately
strong pressure gradient maintaining widespread low clouds along
the coast and inland through the bays and low lying coastal
regions. Temporary or partial clearing is once again anticipated
over bay area and monterey bay area terminals. An early return is
expected as low clouds push inland after sunset. Moderate onshore
flow will persist through this evening then diminish overnight.

Vicinity of ksfo... A deep 3000 ft marine layer and a strong
onshore gradient will maintain MVFR CIGS across area terminals
through the forecast period. Brisk onshore winds around 15 to 20
kt with occasional higher gusts will continue through this
evening. Winds will diminish overnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... A deep 3000 ft marine layer and a strong
onshore gradient will maintain MVFR CIGS across area terminals
through late tonight. CIGS will drop to ifr after 09z. Onshore
winds around 10 kt will gradually diminish this evening to around
5 kt overnight.

Marine As of 2:33 pm pdt Tuesday... Generally light northwest
winds are expected this evening and overnight, though locally
breezy conditions are possible near the golden gate and angel
island. Winds will become southerly by Thursday morning as a weak
low pressure system approaches from the west. This low will bring
a chance of showers Thursday through Friday night. A long period
southwest swell will persist with a shorter period northwest swell
through the week.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
public forecast: as
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 13 mi107 min WNW 7 54°F 1013 hPa52°F
46092 - MBM1 16 mi87 min W 12 54°F 53°F1013.1 hPa (-0.6)
46240 - Cabrillo Point, Monterey Bay, CA (158) 23 mi41 min 57°F3 ft
MEYC1 25 mi56 min WSW 6 G 8 54°F 58°F1013.8 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 29 mi42 min WNW 9.7 G 12 53°F 53°F6 ft1013.1 hPa (+0.3)
46114 - West Monterey Bay, CA 29 mi32 min 55°F6 ft
RTYC1 - 9414523 - Redwood City, CA 41 mi44 min W 12 G 14 55°F 65°F1013.4 hPa
46239 - Point Sur, CA (157) 44 mi32 min 53°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 mi39 minSSW 67.00 miOvercast53°F52°F96%1013.3 hPa

Wind History from WVI (wind in knots)
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Last 24hrE5E6E3E5CalmCalmCalmCalmSW4W3CalmCalmSW5CalmS5SW6SW8SW9SW10SW11SW8SW12SW8S6
1 day agoCalmNW3CalmNW3W5W4SW3CalmCalmCalmCalmCalmE6SE64SE5SW7S6S7E4E8E9E10E8
2 days agoE6NE5E6CalmCalmCalmW3W3CalmCalmW4Calm43S8SW8S11SW11SW10SW8
G17
SW7W7W5SW4

Tide / Current Tables for Santa Cruz, Monterey Bay, California
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Santa Cruz
Click for Map
Tue -- 02:11 AM PDT     Moonset
Tue -- 04:45 AM PDT     4.40 feet High Tide
Tue -- 05:54 AM PDT     Sunrise
Tue -- 11:49 AM PDT     -0.27 feet Low Tide
Tue -- 01:28 PM PDT     Moonrise
Tue -- 06:45 PM PDT     4.63 feet High Tide
Tue -- 08:14 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.32.73.33.94.34.44.13.42.41.40.5-0.1-0.30.10.91.933.94.54.64.33.732.3

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Tue -- 01:32 AM PDT     0.00 knots Slack
Tue -- 02:11 AM PDT     Moonset
Tue -- 04:05 AM PDT     0.39 knots Max Flood
Tue -- 05:55 AM PDT     Sunrise
Tue -- 06:48 AM PDT     -0.00 knots Slack
Tue -- 09:53 AM PDT     -0.72 knots Max Ebb
Tue -- 01:28 PM PDT     Moonrise
Tue -- 01:52 PM PDT     0.00 knots Slack
Tue -- 05:07 PM PDT     0.68 knots Max Flood
Tue -- 08:14 PM PDT     Sunset
Tue -- 08:18 PM PDT     -0.00 knots Slack
Tue -- 11:02 PM PDT     -0.53 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.3-0.10.10.30.40.30.2-0.1-0.4-0.6-0.7-0.6-0.5-0.300.40.60.70.60.40.1-0.2-0.5-0.5

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (23,6,7,8)
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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.