Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Big Lagoon, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 5:45AMSunset 8:54PM Wednesday June 28, 2017 7:09 PM PDT (02:09 UTC) Moonrise 10:05AMMoonset 11:27PM Illumination 25% Phase: Waxing Crescent; Moon at 5 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- 254 Pm Pdt Wed Jun 28 2017
.small craft advisory in effect through Thursday evening...
Tonight..N winds 5 to 15 kt. Gusts up to 30 kt. Waves nw 8 ft at 9 seconds.
Thu..NW winds 5 to 15 kt. Waves nw 8 ft at 7 seconds...and nw 2 ft at 11 seconds.
Thu night..NW winds 5 to 15 kt. Waves nw 6 ft at 7 seconds... And nw 2 ft at 11 seconds.
Fri..NW winds 5 to 15 kt. Waves nw 5 ft at 6 seconds...and nw 2 ft at 10 seconds.
Fri night..N winds 5 to 15 kt. Waves nw 6 ft at 7 seconds... And nw 2 ft at 12 seconds.
Sat..N winds 5 to 15 kt. Waves nw 7 ft at 7 seconds...and W 3 ft at 11 seconds.
Sun..NW winds 5 to 15 kt. Waves nw 7 ft at 7 seconds.
Mon..N winds 5 to 15 kt. Waves N 7 ft at 7 seconds.
PZZ400 254 Pm Pdt Wed Jun 28 2017
Synopsis for northern california waters..Moderate to fresh north winds and steep seas will persist over the next several days as high pressure remains stationed offshore. Gale force wind gusts will be possible across the outer waters this weekend.

7 Day Forecast for Marine Location Near Big Lagoon, CA
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location: 41.17, -124.32     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 282218
afdeka
area forecast discussion
national weather service eureka ca
318 pm pdt Wed jun 28 2017

Synopsis
The weather this weekend will return to a more typical summer
pattern, with warm temperatures persisting across the interior
through the weekend. Marine stratus will continue along the coast
during the overnight and early morning hours for the next couple
of nights, with temperatures near or slightly warmer than seasonal
values continuing into early next week.

Discussion
Short term
(tonight through Friday night)
more of the same can pretty much sum up our weather for the next 18
hours, as stratus has been rather stubborn in its recession along
most of the redwood coast. However, the latest sounding out of
mckinleyville shows the marine layer has decreased to about 2500
feet depth, which is about 500 feet less than yesterday. This has
proven useful in eroding the clods more, as most of the outer waters
have become clear, and the stratus is rapidly decreasing in coverage
and depth along the coast from humboldt hill north to klamath right
now. This should provide a few hours of sunshine, before the clods
increase again after sunset. In fact, a developing southwest flow
ahead of an incoming shortwave trough may allow the stratus to
penetrate a little further inland tonight, especially along the
river valleys. As for temperatures overnight, heights aloft
increase, causing 850mb temps to warm about 2 to 3 deg. C area-wide,
resulting in lows being a couple of degrees warmer than what was
observed this morning for most locations.

Speaking of that shortwave, normally one would think our convective
chances for the interior would increase, as the base of the trough
and resultant best lift treks right down highways 299 36. The
problem seen in the soundings this go around is the dearth of
moisture. Given this is a fast moving system and there's no
prolonged period of southeast to south winds, as we typically need
to get a more substantial increase of moisture across the interior
as it creeps up the valley, the net affect fro the added lift will
be nil. At this point, maybe some slightly higher wind gusts may
help warm temperatures a bit due to increased down-slope effects.

Seasonably warm values will continue Friday night, with soundings
continuing to show a bone-dry profile.

Long term
(Saturday through Thursday)
riding aloft will once again attempt to build northeastward across
the forecast area, with 500mb heights increasing into the 586-590dkm
range, with 850mb temps increasing into the 20-25 deg. C range as
well for our neck of the woods. This will in turn cause temperatures
to rise about 2 to 5 degrees during the afternoon, with the interior
valleys likely seeing highs in the middle to upper 90s. The
increased heights temperatures aloft will also help morning lows
increase a degree or two as well.

Another disturbance aloft will pass by to our north for the
beginning of the work week, helping to flatten the ridge some. This
will allow temperatures to drop back to more seasonal values, with
dry weather continuing through the period. Pd

Aviation
The marine layer behavior remained persistent across the north coast
and nearby coastal mountains and valleys since the beginning of the
week. The impact at acv & cec appeared to be mostly minimal as
visibilities were basically ok and CIGS were not super-restrictive.

The stratus has been especially "clingy" at coast from cape
mendocino to trinidad. Lower cloud CIGS were mostly ifr-lifr.

Following an afternoon of widespread clearing, marine clouds will
redevelop across the coastal areas in the evening overnight. Inland
areas will remainVFR... Including kuki. Ta

Marine
Fresh to moderate winds and steep seas will persist
through the next several days as high pressure stationed offshore
maintains a tight gradient. The existing small craft advisories
remain in effect. Winds across the northern waters could diminish
subtly Thursday night into Friday. However, they will increase again
over the weekend with more numerous gale force wind gusts possible
across the outer waters. Thus, our existing advisories may need to be
extended or upgraded later this week. Kml

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until 11 pm pdt Thursday for pzz450.

Small craft advisory until 3 am pdt Friday for pzz455-470-475.

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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 19 mi48 min 56°F6 ft
HBYC1 - 9418767 - North Spit, CA 28 mi93 min NNW 7 G 8 55°F 54°F1017.4 hPa
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 33 mi79 min NNW 12 G 16 56°F 54°F6 ft1016.6 hPa (+0.0)52°F
CECC1 - 9419750 - Crescent City, CA 40 mi51 min SSW 5.1 G 9.9 59°F 57°F1015.3 hPa
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 47 mi79 min N 23 G 29 55°F 53°F8 ft1013.7 hPa (-0.9)

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, CA17 mi76 minNNW 1010.00 miFair59°F53°F81%1016.9 hPa

Wind History from ACV (wind in knots)
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Last 24hrN7N5N6CalmCalmCalmS3S5S5S3CalmNW3NW3NW5NW7NW6W5NW5NW7NW7NW8NW8NW10NW11
1 day agoNW5NW3CalmCalmNE3N3NE3NE3NE3CalmN3N5NE44NW4NW7NW8NW7NW8NW8NW8NW7NW8NW11
2 days agoNW3CalmCalmCalmCalmCalmCalmCalmN3CalmCalmCalmW3W3CalmCalmW5W6NW4W5W8NW6NW7NW7

Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
Click for Map
Wed -- 03:03 AM PDT     6.50 feet High Tide
Wed -- 05:46 AM PDT     Sunrise
Wed -- 09:51 AM PDT     -0.86 feet Low Tide
Wed -- 11:04 AM PDT     Moonrise
Wed -- 04:37 PM PDT     6.13 feet High Tide
Wed -- 08:52 PM PDT     Sunset
Wed -- 10:22 PM PDT     2.18 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.15.26.16.56.25.23.720.5-0.6-0.8-0.40.82.33.95.266.15.64.63.62.72.22.3

Tide / Current Tables for Mad River Slough, Arcata Bay, Humboldt Bay, California
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Mad River Slough
Click for Map
Wed -- 03:55 AM PDT     7.59 feet High Tide
Wed -- 05:47 AM PDT     Sunrise
Wed -- 10:30 AM PDT     -0.94 feet Low Tide
Wed -- 11:04 AM PDT     Moonrise
Wed -- 05:31 PM PDT     6.96 feet High Tide
Wed -- 08:52 PM PDT     Sunset
Wed -- 10:57 PM PDT     2.44 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.95.26.47.37.67.15.83.91.90.2-0.8-0.801.53.14.86.16.96.96.253.82.82.4

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 (22,6,7,8)
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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.