Friday, June23, 2017 L-36.com


Marine Weather and Tides
Eureka, 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 5:44AMSunset 8:53PM Friday June 23, 2017 7:01 AM PDT (14:01 UTC) Moonrise 4:36AMMoonset 7:31PM Illumination 0% Phase: New Moon; Moon at 29 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 1227 pm pdt Wed apr 19 2017 a marine weather statement has been issued for the following areas... Coastal waters from cape mendocino to pt. Arena ca out 10 nm... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay bar... Waters from cape mendocino to pt. Arena ca from 10 to 60 nm... Waters from pt. St. George to cape mendocino ca from 10 to 60 nm... Scattered Thunderstorms will continue to develop through 3 pm. The main storm hazards will be dangerous cloud to water lightnig...wind gusts to 40 knots or more...small hail...and waterspouts. 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.ground 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 4156 12410 4150 12398 4153 12407 4154 12408 4089 12413 4076 12423 4087 12414 4085 12409 4083 12408 4065 12431 4060 12416 4051 12413 4063 12432 4043 12441 4044 12581 4129 12555 4168 12568 4178 12579
PZZ400 228 Am Pdt Fri Jun 23 2017
Synopsis for northern california waters..North winds and steep seas will diminish today with light and generally south winds expected into the weekend. Building high pressure will bring fresh north winds once again next week. The sea state will be quite low this weekend with steep building waves for next week.

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 231231 aaa
afdeka
area forecast discussion... Updated
national weather service eureka ca
512 am pdt Fri jun 23 2017

Synopsis Inland heat will continue for the next few days, with
relief expected to arrive early next week. Isolated thunderstorms
will be possible across the interior on Sunday afternoon.

Discussion Early morning goes-16 imagery shows that a
southerly surge of stratus and fog has made it all the way to cape
mendocino. The rap model has a very good handle on this
progression and it, along with the hrrr wind field, shows it
rounding the CAPE before the S surge drops off in intensity. The
hrrr does develop a weak low offshore the redwood coast this
afternoon which should act to push the clouds farther up the
coast. Any clouds that do make it to coastal beaches will likely
not push too far inland do to strong inland mixing. Nighttime and
morning coastal clouds will become more prevalent over the next
few days, but improvement should be noted by each afternoon.

Hot inland temperatures will continue through the weekend, but
readings should be a bit lower than on Thursday due to a pinching
of the upper ridge over the area. Warm redwood coast temperatures
are possible again today, although the aforementioned clouds and
marine layer will bring a tight temperature gradient in the
coastal plain. There are indications that downsloping flow from
the NW may persist for portions of coastal del norte county. In
addition, the thickest coastal clouds are expected to mostly
remain just to the S of this area. This will make the temperature
forecast tricky. Have gone a few degrees over model guidance for
highs there today.

As coastal clouds increase, there is the potential for some patchy
drizzle along the redwood coast, particularly Sunday and Monday
mornings. Increased moisture and instability may lead to isolated
thunderstorms over the interior this weekend. Have left Saturday
pops silent (around 10%). Have continued isolated thunder over
portions of trinity and NE mendocino counties on Sunday afternoon.

Convective inhibition (cin) will be fairly high, but a weak
shortwave will be passing over the area from SW to NE during the
afternoon. This may be enough of a boost in lift to promote shower
or thunderstorm development over some ridgetops.

Less inland heat is expected early next week, but temperatures
will rise once again by mid-week to about 5 to 10 degrees above
normal. Sec

Aviation Cec and acv have had sporadic visibility reductions
this morning due to sea spray haze mist. Expect to continue to see
these sporadic visibility reductions throughout the early morning
however will not go with ifr visibilities as models suggest but
rather stick with MVFR visibilities. Later this morning expect
conditions to go toVFR at all three airports. While a stratus
surge from the south is currently ongoing do not expect this
stratus deck to make it into acv or cec until late this evening.

Wci

Marine Winds will quickly diminish from south to north early this
morning as a shifting surface low allows the pressure gradient to
relax across the coastal waters. Winds will be light to gentle and
generally out of the south this weekend. Expect some stronger south
winds near CAPE mendocino which should result in a light chop. Light
to gentle winds will continue through early next week before high
pressure builds offshore. This will pinch the gradient, once again,
bringing fresh northerlies to the waters for the middle of next
week. Gusts during this time are forecast to reach near 30 kt across
the outer waters. Steep waves, today, will be slower to subside but
should continue this trend through the day with quite low seas
expected into the weekend. Low seas should persist through the
weekend with steep conditions taking over as north winds increase
next week. Kml

Coastal surf Tidal anomalies were running around .6 to .7 feet
during yesterday evening's high tide. Astronomical tides are running
high as well, so the actual tide rose to around 8.8 feet. This is
the level at which some flooding is reported in king salmon. The
predicted high tide late this evening is expected to be a bit higher
than Thursday evening's. We'll continue to monitor the anomalies for
a possible coastal flood advisory. Sec

Eka watches warnings advisories
Ca... Heat advisory until 8 pm Saturday for caz102-105>108-110-111-113.

Northwest california coastal waters...

small craft advisory until 9 am this morning for pzz450-475.

Gale warning until 9 am pdt this morning 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 mi85 min S 8.9 G 11 53°F 55°F1010.8 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi40 min 51°F10 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 22 mi71 min SW 9.7 G 12 55°F 53°F10 ft1010.1 hPa (+0.5)51°F
46213 - Cape Mendocino, CA (094) 47 mi39 min 53°F11 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 mi68 minE 46.00 miFog/Mist53°F51°F93%1011.2 hPa
Fortuna Rohnerville Airport, CA18 mi66 minSE 35.00 miFair50°F50°F100%1010.8 hPa

Wind History from ACV (wind in knots)
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Last 24hrCalmNW34S4SW6NW4NW8N10N6
G15
NW93S10SW10S11S4CalmCalmCalmE3CalmSE3E3SE4E4
1 day agoNW3CalmNW3NW3W6SW9W6NW9N9N12NW13
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N8S7SE5SW5CalmCalmCalmE3E3CalmCalmE3
2 days agoCalmCalmW3W5SW35NW13NW15NW16
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NW15NW14NW10NW7NW7NW5CalmS4CalmCalmNW5CalmCalmNW3Calm

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
Click for Map
Fri -- 05:36 AM PDT     Moonrise
Fri -- 05:45 AM PDT     Sunrise
Fri -- 06:14 AM PDT     -1.83 feet Low Tide
Fri -- 01:09 PM PDT     6.18 feet High Tide
Fri -- 05:57 PM PDT     2.21 feet Low Tide
Fri -- 07:32 PM PDT     New Moon
Fri -- 08:30 PM PDT     Moonset
Fri -- 08:51 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.67.65.83.41-0.9-1.8-1.5-0.41.22.94.55.76.25.94.93.72.62.22.73.85.46.98.2

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Fri -- 05:36 AM PDT     Moonrise
Fri -- 05:46 AM PDT     Sunrise
Fri -- 05:59 AM PDT     -1.77 feet Low Tide
Fri -- 12:35 PM PDT     5.66 feet High Tide
Fri -- 05:42 PM PDT     2.15 feet Low Tide
Fri -- 07:32 PM PDT     New Moon
Fri -- 08:30 PM PDT     Moonset
Fri -- 08:51 PM PDT     Sunset
Fri -- 11:45 PM PDT     8.16 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.66.34.32.20.2-1.3-1.8-1.301.73.34.75.55.654.13.12.32.22.84.15.677.9

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 (10,2,3,4)
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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.