Thursday, June21, 2018 L-36.com


Marine Weather and Tides
Trinidad, 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 5:43AMSunset 8:53PM Thursday June 21, 2018 7:10 AM PDT (14:10 UTC) Moonrise 1:42PMMoonset 1:07AM Illumination 57% 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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PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 302 Am Pdt Thu Jun 21 2018
.small craft advisory in effect from Friday morning through Saturday afternoon...
Today..NW winds 5 to 10 kt. Waves nw 3 ft at 4 seconds...and W 3 ft at 11 seconds. Patchy fog.
Tonight..N winds 5 to 15 kt. Waves nw 4 ft at 5 seconds...and W 2 ft at 10 seconds. Patchy fog.
Fri..N winds 10 to 20 kt. Gusts up to 30 kt. Waves nw 7 ft at 7 seconds. Patchy fog.
Fri night..N winds 10 to 20 kt. Waves nw 8 ft at 8 seconds.
Sat..N winds 10 to 20 kt. Waves nw 9 ft at 9 seconds.
Sun..NW winds 10 to 15 kt. Waves nw 7 ft at 7 seconds.
Mon..NW winds 10 to 20 kt. Waves nw 7 ft at 7 seconds...and nw 4 ft at 12 seconds.
PZZ400 302 Am Pdt Thu Jun 21 2018
Synopsis for northern california waters..North winds will increase through the end of the week as high pressure strengthens offshore. Gale force winds and steep hazardous seas are likely Friday through Monday.

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 211145
afdeka
area forecast discussion
national weather service eureka ca
445 am pdt Thu jun 21 2018

Synopsis Summer is arriving right on time, as temperatures
will heat up across inland northern california for the end of the
week and the weekend, accompanied by widespread sunshine.

Northerly breezes and marine air will keep most coastal areas
seasonably cool.

Discussion High pressure aloft will begin to build across
northern california today while a departing trough tracks eastward
over the intermountain west. While we saw some thunderstorm
development around northeastern trinity county Wednesday afternoon
and evening, this high pressure ridge will suppress afternoon
cumulus development over the mountainous terrain, and but the
kibosh on any shower or thunderstorm chances. This will set the
stage for an extended dry spell, which may last right through next
week. The next storm system moving off the pacific will track to
our north on Friday, and then drop well to our east over the
rockies, while upper-level ridging really amplifies along the west
coast heading into this weekend. This will not only suppress
cloud cover away from the coast, but result in hot temperatures,
peaking over 100 degrees Friday, Saturday, and Sunday for the
hottest interior valleys of trinity and mendocino counties. Thus,
a moderate risk of adverse health effects will be possible for
those sensitive to heat this weekend. That being said, none of
this is out of the ordinary for late june, as a few 100-degree
days are fairly typical during the course of the month. In fact,
june 21st and 22nd of last year saw high temperatures at ukiah
reach 107 and 111 respectively, both of which were records.

Meanwhile, along the coast, low clouds and patchy fog will remain
the forecast challenge. Overcast conditions cover almost all of
our coast this morning, except around shelter cover. The building
high pressure aloft will tend to lower the top of the marine
layer, and limit the inland extent of the stratus, but expect
only limited afternoon breaks of sunshine between eureka and
crescent city. By Friday increasing northerly winds will tend to
scour out the low cloudiness, especially during the afternoon
hours. Friday night into Saturday low-level winds will have an
offshore component over del norte and mendocino counties, keeping
those areas largely clear even during the nights and mornings.

Still expect some areas of morning clouds along the humboldt
coast. The beaches will be windy on Friday and Saturday,
especially in those areas that remain clearer.

Winds will turn more onshore later Sunday into next week. This
will result in increasing cloudiness along the coast. An upper-
level trough tracking across the pacific northwest supporting this
push of marine air will not bring any precipitation to our region
outside of some coastal drizzle, but will act to lower
temperatures back into the 80s and low 90s across inland areas
heading into next week. Aad

Fire weather Building high pressure aloft late this week into
the weekend will bring dry, clear, and hot weather to northern
california. Fuels are not critical yet, though they have been
drying fast, and grasses are curing. The most critical period will
be Saturday afternoon through Sunday morning, as drying offshore
winds will bring afternoon humidity into the teens. Rh values will
only recover into the 30s and upper 20s across the mountainous
terrain of western mendocino national forest and the trinity alps.

However, north-northeasterly winds should stay in the 6-12 mph
range, which along with non-critical fuels, should limit the
potential for fire. Aad

Aviation Stratus continues to impact both acv and cec this
morning with MVFR to ifr ceilings. The profiler at acv indicates the
marine layer remains around 2000 feet along the coast however this
should begin to decay as we go through the day. Therefore some
clearing should be possible today along the coast late this morning
or early afternoon. MVFR to ifr ceilings will then return late this
evening at cec and acv. Uki will remainVFR through this forecast
period. Wci

Marine The calm marine conditions will be coming to an end today
across the waters as the pressure gradient continues to strengthen.

Latest ascat pass shows northerly winds in place across the waters
with winds near 15 kts across the southern zones. Seas have reached
their minimum this morning as well with most buoys reporting 3-4 ft
across the inner waters due to a westerly swell.

Winds will continue to strengthen reaching small craft advisory
level across the southern waters by this afternoon and across the
northern waters by Friday morning. I did debate issuing a gale watch
for the southern waters Friday afternoon however it would be a lower
end gale and in a relatively small area. Will go ahead and let the
day shift take a look at the latest guidance and they may need to
issue a gale warning later today. Wind waves will also ramp up
leading to very steep and hazardous waves by Friday morning. These
strong winds and steep seas will persist through at least the end of
next week. Wci

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory from 9 am
Friday to 3 pm pdt Saturday for pzz450.

Small craft advisory from 3 am Friday to 3 pm pdt Saturday for
pzz470.

Small craft advisory from 3 pm this afternoon to 3 pm pdt
Saturday for pzz455-475.

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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 16 mi41 min 52°F3 ft
HBYC1 - 9418767 - North Spit, CA 21 mi41 min NNE 8.9 G 9.9 53°F 52°F1020.2 hPa
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 31 mi31 min N 12 G 16 54°F 53°F1020.2 hPa51°F
CECC1 - 9419750 - Crescent City, CA 47 mi47 min N 2.9 G 4.1 55°F 50°F1019.6 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 mi78 minno data10.00 miOvercast55°F50°F83%1019.8 hPa

Wind History from ACV (wind in knots)
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Last 24hrCalmCalmW3NW6W8W7NW8NW8NW8NW8NW9
G20
NW7NW8N7N7N4NW4NE3NE3CalmNE3Calm--NE3
1 day agoW5NW4NW5W6NW6W5NW8NW10NW9NW9NW7NW7--W5S3S4SE3CalmCalmCalmCalmCalmCalmE3
2 days agoSW3W7W4CalmW5W5NW7NW95W3W6NW7NW6W4CalmCalmCalmCalmNE4CalmN4NW3N4NE3

Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
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Thu -- 01:16 AM PDT     1.62 feet Low Tide
Thu -- 02:06 AM PDT     Moonset
Thu -- 05:44 AM PDT     Sunrise
Thu -- 06:57 AM PDT     4.79 feet High Tide
Thu -- 01:01 PM PDT     0.90 feet Low Tide
Thu -- 02:41 PM PDT     Moonrise
Thu -- 07:45 PM PDT     6.43 feet High Tide
Thu -- 08:52 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
21.61.82.33.144.64.84.53.82.91.91.20.91.223.14.45.56.36.4653.8

Tide / Current Tables for Mad River Slough, Arcata Bay, Humboldt Bay, California
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Mad River Slough
Click for Map
Thu -- 01:49 AM PDT     1.86 feet Low Tide
Thu -- 02:06 AM PDT     Moonset
Thu -- 05:45 AM PDT     Sunrise
Thu -- 07:42 AM PDT     5.60 feet High Tide
Thu -- 01:37 PM PDT     0.87 feet Low Tide
Thu -- 02:41 PM PDT     Moonrise
Thu -- 08:36 PM PDT     7.45 feet High Tide
Thu -- 08:51 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
32.11.92.233.94.85.45.65.14.12.91.810.91.52.63.95.46.67.37.46.85.6

Weather Map and Satellite Images
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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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Wind Forecast for Eureka, CA (10,2,3,4)
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Ground Weather Radar Station Eureka, 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.