Friday, April20, 2018 L-36.com


Marine Weather and Tides
Myrtle, CA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 6:27AMSunset 8:03PM Friday April 20, 2018 11:36 AM PDT (18:36 UTC) Moonrise 9:15AMMoonset 12:00AM Illumination 29% 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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PZZ410 730 pm pdt Tue mar 13 2018 a marine weather statement has been issued for the following areas... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay bar... At 729 pm pdt, doppler radar indicated a shower, capable of producing winds to around 30 knots. This shower was located 9 nm north of cape mendocino, moving northeast at 20 knots. Precautionary/preparedness actions... Water spouts are possible along with stronger Thunderstorms...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. Mariners can expect gusty winds to around 30 knots...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && lat...lon 4080 12411 4080 12418 4075 12419 4073 12423 4070 12421 4068 12422 4070 12427 4071 12427 4065 12431 4063 12429 4063 12424 4062 12426 4063 12432 4047 12439 4057 12459 4095 12437 4086 12417 4076 12423 4085 12416 4082 12409 PZZ400 855 Am Pdt Fri Apr 20 2018
Synopsis for northern california waters..Winds will remain out of the north today but will be a bit lighter than on Thursday. Gale force northerlies and large, steep wind waves will build Saturday as a result of a strengthening pressure gradient.

7 Day Forecast for Marine Location Near Myrtle, CA
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location: 40.8, -124.14     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 201125
afdeka
area forecast discussion
national weather service eureka ca
425 am pdt Fri apr 20 2018

Synopsis Mainly dry weather will occur across the region
during the next seven days. This will bring above normal
temperatures in the inland areas. Along the coast periods of
breezy north winds and occasional marine stratus will keep
temperatures near normal.

Discussion High pressure is currently centered over the area.

This will start to shift off to the east today with an
approaching shortwave. The stratus should increase along the
coast late this afternoon or evening as the wind flow becomes more
onshore. Inland temperatures will continue to warm up today,
highs should climb into the 70s. Tonight a weak trough moves
through the area which is only expected to bring a few high
clouds. The warm afternoon temperatures, slightly increased winds
and the potential for a few clouds should limit the chance for
frost to only the coldest spots in trinity county tonight.

Saturday dry air and breezy conditions should mix out any low
clouds along the coast. This should also help inland temperatures
to warm into the upper 70s to low 80s. Saturday night another
shortwave moves through the area. This will cool temperatures
slightly for Sunday afternoon in the inland areas. Northerly winds
will also increase as this feature moves past the area. Frost is
possible both nights, but coverage should be limited to the
most protected valleys mainly in trinity county.

High pressure is expected to remain in place over the area on
Monday and Tuesday. Highs will be in the upper 70s to low 80s in
the inland areas. The coast may see highs in the 60s on Monday and
should see mainly clear skies. Tuesday the ridge axis looks to
move east of the area increasing the potential for stratus along
the coast and that will keep coastal temperatures cooler.

Northerly winds along the coast should start to diminish as well.

Wednesday an upper level low starts to approach the area. The
models start to disagree on the exact timing and location of the
system, but there is general agreement that the low will remain
in the area through the week. This brings the potential for some
showers over the inland areas, but confidence is low on the timing
and location of these. The pressure gradient will also relax which
could allow some coastal clouds to form. Inland temperatures will
cool and likely return closer to normal. Widespread rain doesn't
look likely at this point. Mkk

Aviation An area of low clouds formed this evening over the eel
river delta and up the adjacent valley. These clouds have not
expanded and have actually pulled a little bit farther up the valley
away from the coast. Adjusted the acv TAF earlier to scale back on
MVFR ceilings, with only a brief tempo group around sunrise. Even
this is highly uncertain at this time. Other than some mid and high
cloudiness later today and some gusty winds along the redwood coast
during the afternoon, generally benign conditions are expected to
continue. Sec

Marine Nw to N winds will decrease a bit today across the n
outer waters, but remain near advisory strength over the S outer
waters. Winds will increase across the area by Saturday afternoon
with gales expected over the outer waters as a thermal trough
strengthens over the mainland. Have hoisted a gale watch for the
outer waters from 3 pm Saturday thru Sunday night. NW swells will
continue through the period. Sec

Eka watches warnings advisories
Ca... Frost advisory until 9 am pdt Friday for caz105-107-108.

Northwest california coastal waters...

gale watch from Saturday afternoon through Sunday evening
for pzz470-475.

Small craft advisory until 6 am pdt early this morning for
pzz470.

Small craft advisory until 3 pm pdt Saturday for pzz475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HBYC1 - 9418767 - North Spit, CA 5 mi61 min WSW 6 G 6 50°F 56°F1025 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi37 min 54°F6 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 21 mi47 min NNW 16 G 19 51°F 53°F6 ft1024.5 hPa (+1.0)48°F
46213 - Cape Mendocino, CA (094) 47 mi45 min 52°F6 ft

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, CA13 mi44 minW 810.00 miFair57°F48°F74%1025.2 hPa
Fortuna Rohnerville Airport, CA17 mi62 minWNW 410.00 miFair54°F48°F82%1024.4 hPa

Wind History from ACV (wind in knots)
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Last 24hrNW14NW13NW15NW18NW17
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NW12NW5CalmCalmSE5SE5SE4E5E4E5E5E6E5CalmNE3W6W8
1 day ago6W7NW9NW10NW11NW12NW12N11N8N6NE3CalmE3E3CalmE3E3E5E5E5CalmCalmNW5NW8
2 days agoW8NW9NW9NW10NW9NW10NW9NW8N5E3E3E3E3CalmE3E3CalmE3CalmCalmNE3CalmCalmW5

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
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Fri -- 12:16 AM PDT     Moonset
Fri -- 03:35 AM PDT     7.59 feet High Tide
Fri -- 06:29 AM PDT     Sunrise
Fri -- 10:15 AM PDT     Moonrise
Fri -- 10:20 AM PDT     -0.86 feet Low Tide
Fri -- 05:22 PM PDT     5.66 feet High Tide
Fri -- 08:01 PM PDT     Sunset
Fri -- 10:08 PM PDT     2.74 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.65.86.97.57.56.85.33.41.5-0-0.8-0.70.21.52.94.15.15.65.54.93.93.12.72.9

Tide / Current Tables for Humboldt Bay Entrance, California
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Humboldt Bay Entrance
Click for Map
Fri -- 12:16 AM PDT     Moonset
Fri -- 02:54 AM PDT     6.68 feet High Tide
Fri -- 06:30 AM PDT     Sunrise
Fri -- 10:16 AM PDT     Moonrise
Fri -- 10:19 AM PDT     -0.65 feet Low Tide
Fri -- 04:49 PM PDT     4.81 feet High Tide
Fri -- 08:01 PM PDT     Sunset
Fri -- 10:06 PM PDT     2.96 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.65.66.46.76.35.44.12.51.1-0.1-0.6-0.50.31.62.944.64.84.64.13.63.233.2

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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Wind Forecast for Eureka, CA (14,3,4,5)
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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.