Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Eureka, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:16AMSunset 8:11PM Thursday April 27, 2017 7:24 PM PDT (02:24 UTC) Moonrise 6:33AMMoonset 8:50PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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 207 Pm Pdt Thu Apr 27 2017
Synopsis for northern california waters..Northerly winds will persist through early next week as the east pacific high anchors over the area. There will be a combination of northerly wind wave and westerly swell through the weekend into early 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 272120
afdeka
area forecast discussion
national weather service eureka ca
220 pm pdt Thu apr 27 2017

Synopsis Building high pressure off the west coast will bring
dry weather to the coast and warmer temperatures to the interior.

Breezy northerly winds will be observed along the coast during
the afternoon and early evening periods. The drier weather is
expected to persist into next week.

Discussion Have made few changes to the existing forecast
package. Mostly mid-level cloudiness is heading toward the coast
at the present time with a bit of low and high cloudiness mixed
in. Some cumulus is noted over mainly the mountains of N trinity,
ne humboldt, and E del norte counties due to residual low-level
moisture and daytime instability. A shower or two are possible
over E del norte county into the early evening hours. The land-
based low cloudiness should thin overnight, but some valley low
cloud and fog development is likely. Have forecast some interior
patchy frost below 3000 foot elevations, but uncertainty is high
due to valley and mid-level clouds, potential fog development,
and areal coverage of colder temperatures. The evening shift will
continue to monitor trends for possible shorter fused frost
advisory issuance. There is the potential for some patchy interior
frost again Friday night, but uncertainty is again high.

An upper level ridge over the E pacific will build and shift
slowly E into next week, keeping mostly dry conditions across the
area. A weakening front will approach the or coast on Saturday
night and Sunday. Bumped pops a bit during this time frame over
the extreme n, but have kept them silent (<10%). Also added
isolated thunder for the extreme E portion of the area for next
Thursday due to increased instability parameters and the
possibility of a weakening upper ridge. /sec

Aviation Widespread mid-high clouds dominated area skies today
as high pressure began building over the region... Therefore
producingVFR conditions and breezy northwest-northerly winds
today. Drying and warming will generally result from the building
upper level ridge and surface high. However, guidance (due to
some residual low level moisture) suggests a few pockets of
morning clouds/fog briefly developing locally at the coast and a
few coastal valleys. /ta

Marine Northerlies will prevail through the forecast period as
the east pacific high establishes itself over the area. The
northerly pressure gradient off the NW california coast will be
moderately tight through the weekend. Winds will be around 10 to 20
kt with gusts to 30 kt. Winds will be enhanced Friday night as the
pressure gradient tightens. Occasional wind gusts may get to 35 kt,
especially for the outer waters. The northerly winds will persist
through next week as the east pacific high is not going anywhere.

We have 3 different wave groups. First is the long period southerly
swell, and it is combined with the mid period westerly swell. The
last wave group is the north wind driven short period wave. The wave
height for this wave group is around 8 feet with wave period of
about 8 seconds. All 3 wave groups are expected to continue into
next week.

Small craft advisory is in effect for all waters through Friday
night. The small craft advisory for the southern outside water will
continue through middle of next week. /rl

Eka watches/warnings/advisories
Ca... None.

Northwest california coastal waters...

small craft advisory from 6 pm this evening to 3 am Saturday
for pzz450.

Small craft advisory from 6 pm this evening to 9 am Saturday
for pzz470.

Small craft advisory until 3 am Saturday for pzz455.

Small craft advisory until 9 pm Wednesday 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 mi54 min N 19 G 22 51°F 54°F1022.9 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi63 min 54°F7 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 22 mi94 min N 18 G 19 53°F 54°F7 ft1022.5 hPa (+0.0)46°F
46213 - Cape Mendocino, CA (094) 47 mi62 min 53°F8 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 mi31 minN 910.00 miFair54°F45°F72%1023.3 hPa
Fortuna Rohnerville Airport, CA18 mi49 minN 1110.00 miA Few Clouds54°F41°F63%1022.3 hPa

Wind History from ACV (wind in knots)
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Last 24hrN6N6N7N6N3N3NE4E3E5E3E4CalmE3CalmNW6NW13NW15NW13NW17NW18
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1 day agoCalmCalmE3CalmCalmE4CalmW3S5S3SE4S5S7S9SW9SW10SW9W5NW7NW9N12N13N12N9
2 days agoCalmS4NE4E5E4SE3SE5SE5SE4SE3SE5SE4CalmSE5SE3SE9SE10SE7SE8S9S8S7SE7SE5

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
Click for Map
Thu -- 01:11 AM PDT     8.15 feet High Tide
Thu -- 06:19 AM PDT     Sunrise
Thu -- 07:32 AM PDT     -1.37 feet Low Tide
Thu -- 07:33 AM PDT     Moonrise
Thu -- 02:15 PM PDT     6.64 feet High Tide
Thu -- 07:29 PM PDT     1.35 feet Low Tide
Thu -- 08:09 PM PDT     Sunset
Thu -- 09:49 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.68.17.86.54.42.10-1.2-1.3-0.31.234.766.66.45.33.82.41.51.52.33.85.5

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Thu -- 12:37 AM PDT     7.47 feet High Tide
Thu -- 06:20 AM PDT     Sunrise
Thu -- 07:17 AM PDT     -1.33 feet Low Tide
Thu -- 07:34 AM PDT     Moonrise
Thu -- 01:41 PM PDT     6.09 feet High Tide
Thu -- 07:14 PM PDT     1.31 feet Low Tide
Thu -- 08:09 PM PDT     Sunset
Thu -- 09:50 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.37.46.65.13.11.1-0.5-1.3-1.10.11.73.54.95.96.15.54.331.91.31.62.64.15.7

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.