Monday, May29, 2017 L-36.com


Marine Weather and Tides
Trinidad, 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 5:46AMSunset 8:41PM Sunday May 28, 2017 10:48 PM PDT (05:48 UTC) Moonrise 7:57AMMoonset 10:47PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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- 829 Pm Pdt Sun May 28 2017
Tonight..N winds 5 to 10 kt. Waves N 2 ft at 6 seconds...and nw 4 ft at 10 seconds. Patchy drizzle.
Mon..NW winds 5 to 15 kt. Waves nw 4 ft at 5 seconds...and nw 2 ft at 14 seconds. Patchy drizzle.
Mon night..NW winds 5 to 10 kt. Waves nw 4 ft at 6 seconds... And nw 2 ft at 14 seconds. Patchy fog.
Tue..NW winds 5 to 10 kt. Waves N 4 ft at 6 seconds...and nw 2 ft at 13 seconds.
Tue night..N winds 5 to 10 kt. Waves nw 3 ft at 7 seconds... And nw 2 ft at 13 seconds.
Wed..NW winds up to 5 kt. Waves W 4 ft at 13 seconds.
Thu..NW winds 5 to 10 kt. Waves N 2 ft at 6 seconds...and W 5 ft at 11 seconds.
Fri..N winds 10 to 20 kt. Waves nw 8 ft at 10 seconds.
PZZ400 829 Pm Pdt Sun May 28 2017
Synopsis for northern california waters..North winds will increase through Mon as high pressure offshore builds toward the coast. Short period wind waves will build as a result and peak by Mon evening. Northerly winds will ease Tue and Wed as the offshore ridge becomes perturbed by a front.

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


Area Discussion for - Eureka, CA
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Fxus66 keka 282245
afdeka
area forecast discussion
national weather service eureka ca
345 pm pdt Sun may 28 2017

Synopsis Warm interior temperatures will continue through
Monday with seasonable readings along with low clouds near the
coast. Isolated thunderstorms may develop over the interior
mountains Monday afternoon.

Discussion A sharp upper ridge of high pressure over the
pacific states will gradually shift E as a low pressure trough
pivots toward the N ca coast. Low cloudiness continues to blanket
much of the redwood coast this afternoon with several eddies in
the cloud-level flow evident over the coastal waters. Clouds over
the coastal river valleys have slowly eroded due to daytime
heating and low-level mixing. N flow over the coastal mountains of
sw humboldt county has led to clearing skies downwind due to
downsloping. Some small CU development has been noted over
portions of S trinity county into portions of the yolla bollys.

Through the evening, expect a few showers to develop over the
interior. However, at this time, not expecting any thunderstorm
development. A few breaks in the coastal low clouds are expected
to be short-lived, as clouds thicken back up overnight. A modest
increase in low-level northerlies will lead to enough moisture
pooling and orographic lift to produce some patchy drizzle along
portions of the redwood coast through Monday night, especially
near humboldt bay and just N of CAPE mendocino.

The combination of increased low-level moisture and instability,
along with some weak dynamic forcing associated with the
approaching upper trough and vorticity, will lead to an increased
shot at convection over the interior Monday afternoon. Isolated
thunderstorms are possible, mainly over trinity county. Even
better chances of showers are expected on Tuesday, but, as
mentioned by previous shifts, instability will be waning during
this time frame as cooler air moves into the area. For now, have
continued to just mention showers on Tuesday.

A couple of weak surface fronts will approach the or coast through
mid-week, but these will mainly serve to increase cloudiness
across parts of our county warning area. Heights are expected to
build over the W coast by late in the coming week, with decreasing
chances of rain and warmer temperatures. Maximum temperatures may
once again rise into the 90s over portions of the interior by
next weekend. Sec&wci

Aviation The marine layer will continue to shrink in depth
tonight through Monday as the air aloft warms. Greatest change in
the last 24 hours has been south of CAPE mendo where the bodega bay
profiler indicated a depth up to 500 meters. The change in the depth
at acv was not as dramatic and ceilings have been very similar to
the day before.

Warming aloft coupled with northerly surface flow offshore will keep
stratus locked into coastal areas tonight and probably through most
of the day on Monday. Ceiling have been mostly MVFR today, but
should fall to high ifr this evening as the daytime heating abates.

Confidence is not high vsbys and CIGS will crash to lifr mon
morning, so based the forecast on persistence. With slightly
stronger northerly flow offshore, areas of clear skies will form
downwind of the capes on Monday. It is possible for kcec to scatter
out, though small scale eddies nearshore will completely ruin that
forecast.

Stratus did not make it into kuki last night or this morning. It was
close, just over the ridgeline to the west. With northerly flow
offshore and a shallower marine layer the chance for stratus at kuki
does not look very good. The statistical guidance has it creeping
into kuki around daybreak Monday, so will hint at the possibility
with only scattered clouds near 1000 feet.

Marine North-northwest winds for the most part returned to the
coastal waters today. Northerly winds will be borderline for an
advisory in the waters south of CAPE mendocino late tonight. High
resolution models indicate a weak expansion fan developing downwind
of CAPE mendo by Monday morning. Steep short period northerly wind
waves are expected to build to 5 to 7 ft on Monday as winds reach 20
to 25 kt. Therefore, a small craft advisory has been hoisted for the
offshore waters south of CAPE mendo.

Marginal advisory conditions with steep waves will likely continue
into Monday night south of CAPE mendo. A front will knock down the
offshore ridge on Tue and north winds will diminish though the day
on Tue into wed.

It is probably going to take til the end of the week (fri) or next
weekend (sat and sun), for winds and short period wind waves to ramp
up significantly again. High pressure is forecast to build closer to
the west coast on Friday while a thermal trough develops near the
northern california coast by sat.

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters...

small craft advisory from 3 am Monday to 5 am Tuesday for pzz475.

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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 mi27 min 53°F4 ft
HBYC1 - 9418767 - North Spit, CA 21 mi72 min N 15 G 18 52°F 53°F1020.2 hPa
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 31 mi58 min N 9.7 G 9.7 52°F 53°F4 ft1019.6 hPa (-0.5)50°F
CECC1 - 9419750 - Crescent City, CA 47 mi48 min NW 5.1 G 6 53°F 52°F1020.1 hPa (+0.0)

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 mi55 minNNW 510.00 miOvercast52°F51°F97%1020.3 hPa

Wind History from ACV (wind in knots)
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Last 24hrNW3NW3W3NW5NW4NW6NW5NE3CalmN3NW3NW7NW65W6NW7NW9NW11NW16NW14N9N8N4N5
1 day agoCalmSE3CalmCalmCalmCalmCalmCalmCalmCalmCalmSW3W5W6SW7W7W7W5W6W5W3N3NE3NW4
2 days agoS3S5S6S5SE4S5SE5SE7SE6SE7S7SW6SW10SW9
G16
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Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
Click for Map
Mon -- 02:22 AM PDT     7.05 feet High Tide
Mon -- 05:47 AM PDT     Sunrise
Mon -- 09:24 AM PDT     -1.69 feet Low Tide
Mon -- 10:02 AM PDT     Moonrise
Mon -- 04:12 PM PDT     5.77 feet High Tide
Mon -- 08:40 PM PDT     Sunset
Mon -- 09:33 PM PDT     2.37 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.26.476.964.52.60.7-0.8-1.6-1.5-0.60.82.54.15.35.85.64.93.932.52.43

Tide / Current Tables for Mad River Slough, Arcata Bay, Humboldt Bay, California
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Mad River Slough
Click for Map
Mon -- 03:17 AM PDT     8.25 feet High Tide
Mon -- 05:48 AM PDT     Sunrise
Mon -- 10:03 AM PDT     Moonrise
Mon -- 10:03 AM PDT     -1.77 feet Low Tide
Mon -- 05:07 PM PDT     6.56 feet High Tide
Mon -- 08:40 PM PDT     Sunset
Mon -- 10:09 PM PDT     2.66 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.16.57.68.286.94.92.70.5-1.1-1.8-1.3-0.11.63.34.96.16.66.35.44.23.22.72.9

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 (1,6,7,8)
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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.