Tuesday, January23, 2018 L-36.com


Marine Weather and Tides
Eureka, 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 7:32AMSunset 5:24PM Monday January 22, 2018 11:50 PM PST (07:50 UTC) Moonrise 10:43AMMoonset 11:04PM Illumination 40% Phase: Waxing Crescent; Moon at 6 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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This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ410 754 Am Pdt Thu Sep 7 2017
.a strong Thunderstorm over the waters... The areas affected include... Coastal waters from pt. St. George to cape mendocino ca out to 50... At 751 am pdt...doppler radar indicated Thunderstorms... Capable of producing local winds to around 30 knots and small hail. These storms are moving to the northwest at 25 knots. These Thunderstorms will continue through at least mid morning. Precautionary/preparedness actions... 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 4174 12417 4160 12410 4114 12416 4104 12412 4077 12423 4076 12423 4081 12418 4081 12417 4069 12422 4071 12426 4065 12431 4063 12428 4062 12426 4061 12433 4045 12441 4052 12578 4178 12499 4178 12426
PZZ400 837 Pm Pst Mon Jan 22 2018
Synopsis for northern california waters..Southerly winds will strengthen on Tuesday in advance of an approaching storm. Gale force southerlies are expected as the cold front moves through the waters by early Wednesday morning. A long period westerly swell will continue to subside tonight through Tuesday, however, steep southerly wind waves will start to build on Tuesday. Another large westerly swell will impact the coastal waters Thursday and Friday.

7 Day Forecast for Marine Location Near Eureka, CA
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location: 40.81, -124.14     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 222321
afdeka
area forecast discussion
national weather service eureka ca
321 pm pst Mon jan 22 2018

Synopsis Dry weather will continue through daytime on Tuesday for
most areas. A strong weather front will be the big weather maker
after that. Wind and heavy rain from Tuesday night through
Wednesday. Snow for higher elevation locations Wednesday, with
lowering snow level on Thursday. Lingering showers on Friday into
Saturday.

Discussion Enjoy the dry weather today and Tuesday, before the
weather turns into its active side once again. Highs today were in
the 50s in coastal locations and in mendocino county, with 40s
reported in inland locations. With previous precipitation from
Sunday, our ground is pretty saturated. With light winds and really
stable low level airmass, do expect conditions very conducive for
fog formation. Do expect fog for wind sheltered locations overnight.

Tuesday will be another nice day, with dry conditions and highs in
the upper 50s to near 60 degrees along the coast.

However, Tuesday will be the transition day with the approach of a
strong weather front from the northwest. By late afternoon on
Tuesday, the front will make landfall over del norte county.

Precipitation should begin by Tuesday afternoon evening. There will
be gusty south wind ahead of the front. Do expect southerly gusts to
50 mph for exposed locations along the coastal ridges from Tuesday
night into Wednesday morning. Overnight, precipitation will spread
south and east into the rest of NW california. Precipitation will be
heavy at times during the day on Wednesday. Precipitation should
taper off during Wednesday night as the precipitation pushes inland.

Do expect 1 to 3 inches for most areas, higher amounts to 5 inches
over the exposed windward slopes along the coast.

With the moderate to heavy rainfall over the area, the area rivers
are expect to have modest rises. However, they are expected to
remain below flood advisory criteria. We are fortunate to have two
days of dry weather on Monday and Tuesday before the heavy
precipitation comes in on Wednesday, so that the rivers have time to
drop towards the baseline flow level.

On Wednesday night, as the front pushes inland and much colder air
will filter into the area on the back side. Snow level is expected
to drop from 6000 feet down to 3500 feet by Wednesday evening. Snow
level will further drop into 2000 to 2500 feet through Friday. There
will be lingering showers over the area through Thursday night.

Precipitation over higher elevation locations in trinity county will
be snow. Looks like mountain pass locations along roadways in
trinity county will be the most impacted, with a few inches of snow
expected. Scott mountain pass may see much higher snow accumulation.

Stay tuned to more updates on this situation. Snow showers will
linger into Friday.

Forecast confidence is low starting on Saturday. There is
significant model disagreement on the placement of the atmospheric
river. GFS place the atmospheric river over NW california on
Saturday, while ECMWF has the feature further north in
oregon washington states. If ECMWF solution is correct, then we will
have a dry weekend. If GFS is right, then we will have a soaking wet
weekend, at least for humboldt and del norte county. Forecast
confidence is low unless models resolve their differences.

Marine A new storm system will impact the waters Tue through fri.

Southerlies will start to ramp up on Tue in advance of this storm.

The strongest winds on Tue appear to remain over the northern outer
waters (pzz470) where gale force gusts are possible in the afternoon
as a warm front clips the area. Gale force winds for the rest of the
waters will likely hold off til Tue night or Wed morning, right
before and during cold frontal passage. Robust SW and W winds will
likely follow behind the front on Wed before easing up on thu.

Large mid period swell will continue to subside tonight and tue.

The downside is that southerly wind waves will start to build
through the day on tue. The highest southerly waves will likely be
across the northern outer waters (pzz470) on tue. Short period
southerly seas will continue to build Tue night as winds ramp up
throughout the waters. Combined seas will eventually reach 12 to 14
ft on Wed due to a combination of two short period wave groupds, one
from the west and the other from the s-sw.

The storm will also generate another fairly large westerly swell
group that should arrive on Thu and last through fri. The swell
should peak near 17 feet at 15 seconds Thu night or early Friday
morning. The exact magnitude and timing are still not certain,
however.

High pressure will build on Fri and wind fields should become
lighter. Seas will most likely remain elevated and hazardous,
however. Another storm will approach Fri night or Sat and robust
southerly winds may once again generate steep southerly waves.

The GFS and ECMWF were not in great agreement on the location
and evolution of this storm, so there is low confidence with
the wind and wave forecast going into sat.

Aviation Rainy conditions, low clouds and fog accompanied a
frontal boundary that pushed across the region overnight. Since
then, scattered skies and dry conditions have been the result of
weak high pressure ridging that will be somewhat shortlived.

Another weather system will bring more rain to the region on
Wednesday. In the mean time, increasing cloudiness overnight
expected at the coast, but interior areas will most likely develop
fog low CIGS again... Including uki's airport. Afternoon at some
coastal locales today was briefly obstructed as westerly
winds onshore flow brought hazy conditions to acv and cec... With
both locations briefly reporting MVFR CIGS vis. Wednesday as early
as middle to late morning at cec, models have light rain
possible. Ta

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Gale watch from Tuesday evening through Wednesday morning for
pzz450-455-475.

Small craft advisory until 9 pm pst Tuesday for pzz450-455-475.

Small craft advisory until 1 pm pst Tuesday for pzz470.

Gale warning from 1 pm Tuesday to 10 am pst Wednesday for pzz470.

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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 mi74 min SE 6 G 9.9 45°F 52°F1027 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi50 min 53°F11 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 22 mi60 min ESE 9.7 G 12 49°F 54°F9 ft1026 hPa (-0.4)45°F
46213 - Cape Mendocino, CA (094) 47 mi58 min 54°F12 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 mi57 minESE 410.00 miFair44°F39°F85%1026.9 hPa
Fortuna Rohnerville Airport, CA18 mi75 minSSE 70.15 miOvercast39°F39°F100%1026.7 hPa

Wind History from ACV (wind in knots)
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Last 24hrE3CalmCalmCalmCalmE4CalmE3Calm5CalmCalmW5NW6NW7NW9NW8N3SE3E6SE5E6E4E4
1 day agoSE7SE8SE7SE11SE13
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2 days agoCalmE5CalmE3CalmE3CalmE3E3E3E3CalmW4W5NW3NW4CalmCalmE3E5SE4SE3CalmSE6

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
Click for Map
Tue -- 04:37 AM PST     6.96 feet High Tide
Tue -- 07:33 AM PST     Sunrise
Tue -- 10:26 AM PST     2.57 feet Low Tide
Tue -- 11:13 AM PST     Moonrise
Tue -- 04:20 PM PST     5.75 feet High Tide
Tue -- 05:23 PM PST     Sunset
Tue -- 10:11 PM PST     1.54 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.84.15.36.36.96.96.35.34.13.22.62.73.244.85.45.75.6542.821.61.7

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Tue -- 04:03 AM PST     6.38 feet High Tide
Tue -- 07:34 AM PST     Sunrise
Tue -- 10:11 AM PST     2.50 feet Low Tide
Tue -- 11:14 AM PST     Moonrise
Tue -- 03:46 PM PST     5.27 feet High Tide
Tue -- 05:23 PM PST     Sunset
Tue -- 09:56 PM PST     1.49 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
34.35.36.16.46.15.44.53.52.82.52.73.344.75.25.34.94.23.32.41.71.51.8

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 (2,6,7,8)
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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.