Tuesday, November20, 2018 L-36.com


Marine Weather and Tides
Rio del Mar, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:51AMSunset 4:56PM Tuesday November 20, 2018 12:11 AM PST (08:11 UTC) Moonrise 3:47PMMoonset 3:57AM Illumination 92% Phase: Waxing Gibbous; Moon at 12 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- 905 Pm Pst Mon Nov 19 2018
.small craft advisory in effect from late Tuesday night through Wednesday afternoon...
Tonight..NE winds around 5 kt. Wind waves 2 ft or less. W swell 2 to 3 ft at 12 seconds and sw up to 2 ft at 16 seconds.
Tue..SW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 ft or less. W swell 2 to 3 ft at 11 seconds and sw up to 2 ft at 15 seconds. Hazy.
Tue night..SE winds 5 to 15 kt. Wind waves 2 ft or less. W swell 2 to 3 ft at 17 seconds and sw up to 2 ft at 15 seconds. A slight chance of rain.
Wed..SE winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 5 ft. W swell 2 to 3 ft at 17 seconds and S up to 2 ft at 14 seconds. Showers.
Wed night..SW winds 15 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 1 to 4 ft at 16 seconds. Showers.
Thanksgiving day..W winds 5 to 15 kt. Wind waves around 3 ft. W swell 4 to 7 ft. A chance of rain.
Fri..SW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 5 to 9 ft. Rain.
PZZ500 905 Pm Pst Mon Nov 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light winds expected tonight ahead of the approaching cold front. Southerly winds will increase Tuesday evening into Wednesday as the front moves inland. Infrequent borderline gale force gusts may be possible with the frontal passage Tuesday night through early Wednesday with a slight chance of Thunderstorms on Wednesday. Winds will ease Thursday before the next system moves in late Thursday night into Friday. A small mixed nw and S swell will continue through Tuesday before a longer period northwest swell train arrives midweek.


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 200604
afdmtr
area forecast discussion
national weather service san francisco bay area
1004 pm pst Mon nov 19 2018

Synopsis A pattern change is forecast to develop by late
Tuesday and widespread rainfall is expected on Wednesday with
showers lingering through Wednesday night and possibly into
Thursday morning. A second system will likely bring additional
rainfall to the area from Thursday afternoon through Friday.

Forecast models are trending dry for next weekend.

Discussion As of 9:10 pm pst Monday... Visibilities across our
region this evening are higher than 24 hours ago as air quality
gradually improves. The latest hrrr smoke model indicates
continued gradual improvement through Tuesday and then significant
improvement Tuesday night and Wednesday as stronger winds and
rain associated with the incoming storm system clean the air.

No significant changes are forecast through Tuesday. Daytime
temperatures will remain near, or slightly warmer than, seasonal
averages under partly cloudy and hazy skies.

Satellite shows a pacific weather system offshore approaching
135w. Models are in agreement in spreading rain from this system
into the north bay, as well as coastal areas south of the golden
gate, starting late Tuesday night. But the bulk of the
precipitation with this system is forecast to fall on Wednesday as
a frontal boundary sweeps across our area. Rain rates with this
first system are mostly expected to be light to moderate, but
brief heavy rain may occur along the frontal boundary as it moves
through, most likely on Wednesday afternoon. Scattered showers
are expected to follow the front on Wednesday night, with a few
showers possibly lingering into thanksgiving morning. Models
indicate sufficient instability for at least isolated
thunderstorms on Wednesday afternoon and evening, mainly over the
coastal waters but also possibly across coastal land areas.

Southerly winds will increase ahead of the incoming system on
Tuesday night, and reach peak speeds on Wednesday just ahead of
the front. The local WRF model has recently trended lower on wind
speeds and wind advisories are not anticipated. Strongest winds
are expected near the coast and in the hills where local gusts to
40 mph are possible on Wednesday. Winds will decrease by
Wednesday night.

It's likely that much of our area will see a brief period of dry
weather on thanksgiving day before the next system approaches
from the northwest. The 00z GFS and 00z NAM have both trended
earlier on precipitation onset in the north bay with this second
system, spreading rain across sonoma, marin, and napa counties
from mid afternoon on Thursday through Thursday evening. Rain is
then expected to shift slowly south across much of the rest of
our forecast area Thursday night and Friday. Whereas the first
system is forecast to generate relatively uniform rainfall amounts
across our forecast area, this second system is projected to
produce heavier amounts in the north bay, with rainfall amounts
tapering off rather significantly to the south. In fact, based on
latest model guidance, as much as 2.00-2.50" of rain may fall in
the hills of the north bay from Thursday afternoon through Friday.

Rainfall totals with the first system (late Tuesday night through
Wednesday night) are forecast to mostly be in the half inch to one
inch range, with perhaps locally higher amounts in the hills. The
second system is currently projected to drop between 1.00-2.50
inches in the north bay, about 0.50-0.75" across the remainder of
the sf bay area and santa cruz county, and generally a quarter of
an inch or less across monterey and san benito counties.

The second system will likely bring gusty winds to portions of our
forecast area, especially the north bay, but winds in general are
not expected to be as strong as the first system.

Based on model trends, it now appears likely that the upcoming
weekend will be dry across our area as a shortwave ridge builds
over california. Rain chances will likely be eliminated for the
weekend if all 00z model data indicate dry conditions. In the
longer range, more rain may occur in our area by around the middle
of next week.

Aviation As of 10:00 pm pst Monday... For 06z tafs. High clouds
will continue to push over the region as a low pressure system
off the southern california coast moves toward the baja peninsula.

Lingering smoke will continue to impact area terminals with
reduced vsbys and limiting slant range vsbys on approach
throughout the bay area. MVFR CIGS and vsbys possible through
tonight. Anticipate seeing some improvements towards the 3sm-5sm
range through the next 24 hours. Light winds.

Vicinity of ksfo... High clouds and light winds will prevail. Smoke
will continue to reduce vsbys thru the forecast period.

Visibility will gradually improve Tuesday through Wednesday with
the arrival of a storm system.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... High clouds and light winds will
prevail. Smoke will continue to reduce vsbys thru the forecast
period. Visibility will gradually improve Tuesday through
Wednesday with the arrival of a storm system.

Marine As of 9:00 pm pst Monday... Light winds expected tonight
ahead of the approaching cold front. Southerly winds will
increase Tuesday evening into Wednesday as the front moves inland.

Infrequent borderline gale force gusts may be possible with the
frontal passage Tuesday night through early Wednesday with a
slight chance of thunderstorms on Wednesday. Winds will ease
Thursday before the next system moves in late Thursday night into
Friday. A small mixed NW and S swell will continue through Tuesday
before a longer period northwest swell train arrives midweek.

Mtr watches warnings advisories
Tngt None.

Public forecast: dykema
aviation marine: cw
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ELXC1 - Elkhorn Slough Reserve, CA 13 mi86 min W 1 46°F 1016 hPa43°F
46240 - Cabrillo Point, Monterey Bay, CA (158) 23 mi50 min 61°F2 ft
MEYC1 25 mi95 min 60°F1016.7 hPa
46114 - West Monterey Bay, CA 29 mi41 min 61°F3 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 29 mi81 min SW 5.8 G 7.8 58°F 60°F3 ft1015.8 hPa (+0.6)
RTYC1 - 9414523 - Redwood City, CA 41 mi41 min ESE 2.9 G 4.1 48°F 58°F1016.5 hPa
46239 - Point Sur, CA (157) 44 mi41 min 64°F4 ft

Wind History for Monterey, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Watsonville, Watsonville Municipal Airport, CA6 mi78 minNNW 410.00 miFair47°F37°F69%1016.9 hPa

Wind History from WVI (wind in knots)
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Last 24hrNW6NW4CalmCalmNW4NW3W3W3CalmCalmSE3CalmNE3S5SW6SW3CalmN3NW3N5NW5N4NW4N4
1 day agoNW4CalmNE3CalmE4CalmN3CalmE6E4CalmCalmSW6W7S6SW5CalmCalmCalmNW3N5N3N4Calm
2 days agoCalmCalmN5N5CalmN3CalmN3CalmCalmS5CalmS7SW6W7SW5SW3CalmNW3N4NW3N5NW4NW3

Tide / Current Tables for Santa Cruz, Monterey Bay, California
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Santa Cruz
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Tue -- 01:37 AM PST     1.47 feet Low Tide
Tue -- 03:57 AM PST     Moonset
Tue -- 06:51 AM PST     Sunrise
Tue -- 07:53 AM PST     5.28 feet High Tide
Tue -- 02:35 PM PST     0.39 feet Low Tide
Tue -- 03:47 PM PST     Moonrise
Tue -- 04:55 PM PST     Sunset
Tue -- 08:51 PM PST     4.04 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.91.51.51.92.73.64.45.15.354.23.11.910.50.40.91.62.53.33.943.83.3

Tide / Current Tables for Point Pinos, California Current
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Point Pinos
Click for Map
Tue -- 12:27 AM PST     -0.58 knots Max Ebb
Tue -- 03:57 AM PST     Moonset
Tue -- 03:57 AM PST     0.00 knots Slack
Tue -- 06:50 AM PST     Sunrise
Tue -- 06:52 AM PST     0.60 knots Max Flood
Tue -- 09:54 AM PST     -0.00 knots Slack
Tue -- 12:52 PM PST     -0.83 knots Max Ebb
Tue -- 03:47 PM PST     Moonrise
Tue -- 04:46 PM PST     0.00 knots Slack
Tue -- 04:55 PM PST     Sunset
Tue -- 07:37 PM PST     0.64 knots Max Flood
Tue -- 10:47 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.6-0.4-0.200.30.50.60.50.3-0-0.4-0.7-0.8-0.7-0.5-0.30.10.40.60.60.50.3-0.1

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 (3,6,7,8)
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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.