Sunday, March26, 2017 L-36.com


Marine Weather and Tides
Trinidad, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:05AMSunset 7:37PM Sunday March 26, 2017 5:35 PM PDT (00:35 UTC) Moonrise 5:33AMMoonset 5:16PM 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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PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 407 Pm Pdt Sun Mar 26 2017
.small craft advisory in effect until 9 pm pdt this evening...
Tonight..W winds 5 to 10 kt. Waves sw 10 ft at 8 seconds... And W 3 ft at 22 seconds. Showers.
Mon..NW winds 5 to 10 kt. Waves W 10 ft at 14 seconds. Showers.
Mon night..N winds 5 to 10 kt. Waves W 12 ft at 15 seconds.
Tue..N winds 5 to 10 kt. Waves W 11 ft at 16 seconds.
Tue night..N winds up to 5 kt. Waves W 10 ft at 16 seconds.
Wed..W winds 5 kt. Waves W 10 ft at 16 seconds.
Thu..N winds 10 to 20 kt. Waves N 5 ft at 7 seconds...and W 10 ft at 14 seconds.
Fri..N winds 10 to 20 kt. Waves nw 6 ft at 8 seconds...and W 8 ft at 14 seconds.
PZZ400 407 Pm Pdt Sun Mar 26 2017
Synopsis for northern california waters..Moderately steep seas will persist through this evening. Winds will diminish tonight as a high pressure ridge builds across the region. An elevated westerly swell will propagate across the waters Monday through Wednesday.

7 Day Forecast for Marine Location Near Trinidad city, CA
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location: 41.06, -124.14     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 262236
afdeka
area forecast discussion
national weather service eureka ca
336 pm pdt Sun mar 26 2017

Synopsis A front will slowly exit northwest california this
afternoon producing scattered showers this afternoon. A trough in
the cooler air will generate additional showers tonight through
Monday morning. High pressure will build Monday afternoon and
maintain dry weather through Tuesday.

Discussion The cold front which brought rain earlier today
and continues to supply some gusty winds is slowly migrating
eastward. Although the heaviest rain is behind us the air column
will start to cool down significantly behind the front tonight
while a secondary vort MAX is still expected to move over the
region later tonight into Monday morning and sparking up
additional shower activity. Mid level lapse rates will steepen in
response to strong 500mb cooling, however temperatures through the
entire column will cool as well and snow levels are expected to
fall to around 3kft by daybreak Monday. Freezing levels will be
low enough to consider small hail. Instability parameters (lifted
indices and cape) as well as mid level lapse rates are very
unfavorable for hail production. Shallow convection may still
generate a mix of rain and hail as a mid level trough line swings
across the area early Monday morning. The best location looks to
be across del norte and far northern humboldt counties. Confidence
is by no means high due to the lack of instability and available
buoyant energy to sustain updrafts. After this short-wave
impulse moves across the area Monday morning, upper level ridging
will build over the area and squash any showers that try to sprout
up with daytime heating. An offshore wind flow pattern will
develop Monday night resulting in dry and stable weather
conditions through tue. The latest GFS and ECMWF remain consistent
with bringing another front toward the coast Tue night. There
were still some variations between the two models on how fast the
rain will arrive and how long it will last. The models differed
also on the southern extent of the rain. It is not going to be a
major dumping, however, del norte and humboldt counties will
probably receive some light rain. After that upper level ridging
will return by Fri and provide for 2 to 3 days of dry weather.

The ECMWF and GFS hint at a weak front riding over the ridge
toward the latter portion of next weekend that may generate some
light rain, primarily along the coast and over del norte county. A
spring like weather pattern is starting to take shape with
surface northerlies dominating offshore. Djb/jt

Aviation For most of today, lingering showers were impacting all
terminals. Do expect the showers to continue through the evening.

For ukiah, the showers will diminsh overnight. While for arcata and
crescent city airports, do expect the rain showers to continue
overnight into tomorrow morning. These showers will bring in lower
flight categories at times, down to MVFR. There will also be some
gusty south winds through early this evening, before diminishing
tonight. Behind the weather front, winds will turn northerly and
northwesterly for all terminals tomorrow during the day. /rcl

Marine Fairly active pattern for the next few days. Moderately
steep seas and gusty winds this evening. Winds and seas will subside
overnight tonight. A noticeable swell will be moving into the area
starting on Monday night and will persist through most of the
work week.

Gusty south winds today as a weather front pushed through the area.

Area buoys saw wind gusts to 35 kt. Do expect the winds to subside
this evening as the weather front push inland. The winds should then
turn northwesterly at around 10 to 15 kt with occasional higher
gusts.

Seas-wise, we are still dealing with agitated seas this afternoon.

With short period waves of 9 to 10 feet at around 8 seconds. Do
expect the moderatly steep seas should gradually subside this
evening. Thus, have extended the small craft advisory for the nw
california waters through this evening.

With a northwesterly flow, we will have a fresh northwesterly swell
approaching NW california coast by tomorrow afternoon. The swell
will then remain in the area through most of the work week.

Minimal changes to the previous forecast package were made, as the
forecast is still on track from the previous version.

Eka watches/warnings/advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until 9 pm pdt this evening for pzz450-455-
475.

Small craft advisory until 9 pm pdt this evening for pzz470.

Gale warning until 3 pm pdt this afternoon for pzz470.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46244 - Humboldt Bay, North Spit, CA 17 mi45 min 53°F8 ft
HBYC1 - 9418767 - North Spit, CA 21 mi60 min SW 12 G 14 51°F 53°F1016 hPa
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 31 mi46 min W 9.7 G 12 53°F 52°F7 ft1015.5 hPa (+2.7)49°F
CECC1 - 9419750 - Crescent City, CA 47 mi48 min SSW 8.9 G 12 52°F 54°F1014.7 hPa

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Arcata / Eureka, Arcata Airport, CA5 mi43 minWSW 54.00 miFog/Mist52°F52°F100%1016.3 hPa

Wind History from ACV (wind in knots)
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Last 24hrNW5NW3CalmCalmE3E3SE3SE4E4E6E4SE5SE10SE9SE14
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1 day agoSW10SW9S6SE3S54S4CalmSE3E4E4CalmCalmCalmN7E4E4W3W5W6NW8NW8NW5NW5
2 days agoSE13
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SW12SW8N4E5SE6SE8S7SW9SW10SW12SW10

Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
Click for Map
Sun -- 05:13 AM PDT     1.46 feet Low Tide
Sun -- 06:32 AM PDT     Moonrise
Sun -- 07:09 AM PDT     Sunrise
Sun -- 11:12 AM PDT     6.49 feet High Tide
Sun -- 05:37 PM PDT     -0.04 feet Low Tide
Sun -- 06:15 PM PDT     Moonset
Sun -- 07:35 PM PDT     Sunset
Sun -- 11:56 PM PDT     6.37 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.95.24.12.91.91.51.72.53.7566.56.35.33.92.310.100.723.556

Tide / Current Tables for Mad River Slough, Arcata Bay, Humboldt Bay, California
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Mad River Slough
Click for Map
Sun -- 12:15 AM PDT     6.74 feet High Tide
Sun -- 05:49 AM PDT     1.59 feet Low Tide
Sun -- 06:32 AM PDT     Moonrise
Sun -- 07:09 AM PDT     Sunrise
Sun -- 12:02 PM PDT     7.49 feet High Tide
Sun -- 06:15 PM PDT     -0.05 feet Low Tide
Sun -- 06:15 PM PDT     Moonset
Sun -- 07:35 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.76.55.64.32.91.91.62.13.34.767.17.57.15.84.12.20.7-00.21.32.84.45.9

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 Eureka, CA (20,4,5,8)
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Ground Weather Radar Station Eureka, 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.