Thursday, May25, 2017 L-36.com


Marine Weather and Tides
Seaside, CA

Version 3.4
What's New / NOTES
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 5:51AMSunset 8:16PM Wednesday May 24, 2017 10:05 PM PDT (05:05 UTC) Moonrise 4:19AMMoonset 6:07PM Illumination 0% Phase: New Moon; Moon at 29 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- 925 Pm Pdt Wed May 24 2017
.small craft advisory in effect from Thursday morning through late Thursday night...
Tonight..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 to 4 ft at 11 seconds. Light drizzle or light rain.
Thu..SW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. NW swell 2 to 4 ft at 10 seconds. Light drizzle or light rain in the morning.
Thu night..SW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 to 4 ft at 11 seconds.
Fri..SW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 2 to 3 ft at 10 seconds.
Fri night..SW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 2 to 3 ft at 10 seconds. Patchy fog after midnight.
Sat..NW winds 10 kt. Wind waves 2 ft or less. NW swell 2 ft. Patchy fog.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 2 ft.
Memorial day..W winds 10 kt. Wind waves 2 ft or less. NW swell 2 ft...becoming 2 ft or less.
PZZ500 925 Pm Pdt Wed May 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A newly developing weak low pressure center will form just west of the bay area Thursday and remain nearly stationary through Friday. Southerly winds over much of the coastal waters will persist tonight becoming locally enhanced and gusty Thursday and perhaps again on Friday especially along the big sur and Monterey bay coastline. High pressure will redevelop over the eastern pacific just prior to the memorial day weekend bringing a return to more typical afternoon and evening onshore winds to the coastal waters and bays.

7 Day Forecast for Marine Location Near Seaside, CA
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location: 36.65, -121.81     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 250319
afdmtr
area forecast discussion
national weather service san francisco bay area
819 pm pdt Wed may 24 2017

Synopsis A cooling trend can be expected through Friday as
high pressure weakens and the marine influence increases. Minor
warming is then expected during the upcoming weekend into early
next week as high pressure returns to the west coast.

Discussion As of 08:09 pm pdt Wednesday... No big changes made
to this evening's forecast. Satellite continues to show marine
stratus along the central california coast. The fort ord profiler
indicates the marine layer is just above 2000 ft. Afternoon highs
were distinctly cooler across inland locations with many stations
at least 5 to 15 degrees cooler than Tuesday. Santa rosa observed
one of the most prominent day-to-day changes: the high on Tuesday
was 84 but today it was only 64. The cooler temperatures were a
response to the departing ridge that had been parked over the west
coast earlier this week, as well as a weak upper level low off
the california coast. The persistent onshore flow and overcast
skies helped to minimize the change in afternoon highs along the
coast.

Expect additional cooling through the end of the work week with
below normal temperatures for many locations. Coastal areas will
continue to see low clouds and experience highs ranging from the
middle 50s to 60s. Warmer weather will return for the holiday
weekend as another ridge builds over the west coast with 90s
returning to the southern salinas valley as early as Sunday.

Prev discussion As of 01:33 pm pdt Wednesday... Only minor changes
to the ongoing forecast as unseasonably cool weather prevails into
the weekend with a gradual warm up next week.

Synoptically speaking an upper low remains off the coast spreading
mid and high level clouds over the region. At the surface, onshore
flow continues to keep low clouds and patchy fog along the coast.

The upper low and onshore flow led to much cooler temps around
the region today. 24 hour trend shows some impressive 24 hour
drops, 10 to 15 degrees colder in some spots. At 1 pm santa rosa
is 13 degrees colder today than Tuesday.

Only minor tweaks were made to previous forecast. Night and
morning clouds will continue with a marine layer 1,500 to 2,000
feet into the weekend. Patchy fog and drizzle will be possible,
especially along the immediate coastline. Milder temps will be
possible above the marine layer the next few nights, but not a
very strong thermal belt. As for daytime highs, temperatures will
continue to cool through Friday. Interior locations will drop to
very cool temps for late may with highs in the 70s to lower 80s.

Friday's forecast compare to climo is roughly 5-10 degrees below
normal.

Temperatures will begin to moderate and eventually warm over the
upcoming holiday weekend as high pressure builds over the region.

The warmest of the three days will be memorial day, but mainly
over the interior. Persistent low clouds fog will keep
coastal bay shoreline area cool. Highs on Monday will be 60s to
70s coast and 80s to lower 90s interior. Temperatures level off
next Tuesday and Wednesday.

Outside of some night morning drizzle not forecasting any
noteworthy rain through the end of the month.

Aviation As of 5:45 pm pdt Wednesday... It's a chaotic stratus
and wind pattern presently with a steadily deepening marine layer
responding to ongoing lower level cooling on southerly flow along
the immediate coast. Much cooler pacific air modified by coastal
ssts in the 50s includes modified cooler air arriving from the
mid-high latitudes wrapping around a lower level circulation off
the ca coast. A mid level 500 mb height low approx 400 miles SW of
the bay area advances to the coast coinciding with a newly
developing weak surface low pressure center remaining nearly
stationary just west of the bay area thu-fri. As a result spotty
coastal drizzle or very light rain is possible, none indicated in
00z tafs presently, but will amend as needed.

The marine layer becomes more and more elevated tonight and Thursday.

The primary forecast challenge will be coverage and duration of
stratus ceilings. 925 mb and 850 mb cooling may reach the point of
mixing out the marine layer inversion almost entirely Thursday and
Thursday night.

Vicinity of ksfo... S-sw winds 10-15 knots til 06z this evening then
probably shifting back toward w-sw by later evening, timing is low
confidence. Coordinated with cwsu and we decided to delay the onset
of forecast stratus ceiling based on present local stratus coverage
and wind pattern. Sfo-sac pressure gradient is a healthy 3.6 mb thus
the stratus could suddenly shift inland, but the forecast strongly
hedges on the south wind component holding longer; tempo MVFR cig
06z-08z the MVFR prevailing into Thursday morning.VFR forecast from
17z Thursday through 06z Thursday evening.

Sfo bridge approach... Similar to ksfo. Wind direction forecast is
low confidence from the santa clara valley to smb approach due to
recently strong 2 mb to 3 mb southerly gradient ksns-ksjc; 5 min
metar obs show NW wind 10 knots at ksjc. 00z TAF ksjc forecasts se
wind developing by 03z.

Monterey bay terminals... Tempo MVFR CIGS 00z-04z this evening then
MVFR prevailing tonight and Thursday morning. At least partial clearing
is likely by late Thursday morning depending if the marine layer
inversion persists.

Marine As of 08:09 pm pdt Wednesday... Low pressure off the
central california coast will bring southerly winds to the area
through Thursday. Local gusty winds can be expected Thursday
along the big sur and monterey bay coastline. Surface high
pressure further out in the eastern pacific is bringing northerly
winds offshore north of point reyes. This high will eventually
rebuild off the coast resulting in increasing northerly winds by
late this weekend.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt reyes to pigeon pt 0-10 nm from 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am
sca... Sf bay until 9 pm
public forecast: rowe mm
aviation: canepa
marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
MEYC1 5 mi89 min SSW 8 G 12 55°F 54°F1009 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 5 mi44 min 54°F3 ft
ELXC1 - Elkhorn Slough Reserve, CA 12 mi80 min WNW 6 55°F 1008 hPa53°F
46092 - MBM1 14 mi58 min S 7.8 55°F 56°F1008.1 hPa (-0.5)
46239 - Point Sur, CA (157) 26 mi73 min 53°F6 ft
46114 - West Monterey Bay, CA 29 mi65 min 57°F6 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 35 mi75 min 56°F 55°F7 ft1008.6 hPa (-0.9)

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Monterey, Monterey Peninsula Airport, CA4 mi11 minS 610.00 miOvercast56°F50°F81%1010.3 hPa
Salinas, Salinas Municipal Airport, CA11 mi12 minWNW 910.00 miOvercast58°F51°F78%1009.9 hPa
Watsonville, Watsonville Municipal Airport, CA20 mi12 minSW 510.00 miOvercast55°F53°F93%1009.4 hPa

Wind History from MRY (wind in knots)
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Last 24hrNW4NW3W3S6SW7SW5SW4CalmS4NW3CalmSW5W7W7W9SW13SW11SW12SW10SW14SW11SW9SW9S6
1 day agoNW3W3SW4S4SW5W3NE4N4NE4CalmCalm34NW7SW12
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W9W7NW8NW8NW5SW3N3
2 days agoW4SW4NW33CalmCalmCalmCalmSW3CalmCalmN45NW66N7NW9W9SW9W8W8SW5CalmW3

Tide / Current Tables for Monterey, Monterey Harbor, California
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Monterey
Click for Map
Thu -- 05:02 AM PDT     -1.17 feet Low Tide
Thu -- 05:53 AM PDT     Sunrise
Thu -- 06:06 AM PDT     Moonrise
Thu -- 11:28 AM PDT     4.12 feet High Tide
Thu -- 12:46 PM PDT     New Moon
Thu -- 04:27 PM PDT     1.63 feet Low Tide
Thu -- 08:16 PM PDT     Sunset
Thu -- 08:18 PM PDT     Moonset
Thu -- 10:40 PM PDT     6.41 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.93.41.70.2-0.8-1.2-0.801.32.53.54.143.62.82.11.71.72.33.24.45.56.36.4

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Thu -- 12:00 AM PDT     -0.00 knots Slack
Thu -- 03:13 AM PDT     -1.17 knots Max Ebb
Thu -- 05:53 AM PDT     Sunrise
Thu -- 06:06 AM PDT     Moonrise
Thu -- 07:00 AM PDT     0.00 knots Slack
Thu -- 10:01 AM PDT     0.94 knots Max Flood
Thu -- 12:46 PM PDT     New Moon
Thu -- 01:23 PM PDT     -0.00 knots Slack
Thu -- 03:46 PM PDT     -0.68 knots Max Ebb
Thu -- 06:57 PM PDT     0.00 knots Slack
Thu -- 08:16 PM PDT     Sunset
Thu -- 08:18 PM PDT     Moonset
Thu -- 09:51 PM PDT     0.73 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0-0.5-0.9-1.2-1.1-0.8-0.5-00.50.80.90.80.60.2-0.3-0.6-0.7-0.5-0.300.40.60.70.6

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 (1,6,7,8)
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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.