Monday, August26, 2019 L-36.com


Marine Weather and Tides
Eureka, CA

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7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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Sunrise 6:36AMSunset 8:00PM Monday August 26, 2019 2:15 AM PDT (09:15 UTC) Moonrise 1:07AMMoonset 4:28PM Illumination 18% Phase: Waning Crescent; Moon at 25 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 227 pm pst Fri feb 15 2019 a marine weather statement has been issued for the following areas... Waters from pt. St. George to cape mendocino ca out 60 nm... Humboldt bay bar... At 222 pm pst, doppler radar indicated lines of showers and isolated Thunderstorms over the waters north of cape mendocino, capable of producing winds to around 30 knots and small hail. This activity was moving east-northeast at 30 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. && lat...lon 4174 12417 4154 12405 4153 12405 4154 12408 4124 12410 4114 12416 4089 12413 4084 12418 4086 12410 4082 12410 4065 12431 4060 12418 4062 12424 4063 12432 4045 12440 4047 12579 4129 12555 4168 12568 4178 12579
PZZ400 850 Pm Pdt Sun Aug 25 2019
Synopsis for northern california waters..Northerly winds and waves will continue to increase tonight over the outer waters and remain elevated through Monday night. Closer to shore, winds will generally be lighter with periods of southerly winds. Winds will become southerly across the entire area starting Tuesday afternoon.


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 252305
afdeka
area forecast discussion
national weather service eureka ca
405 pm pdt Sun aug 25 2019

Synopsis Hot inland conditions can be expected through
Wednesday, particularly on Monday and Tuesday, with warmer than
normal temperatures on the coast as well. Shallow coastal clouds
will be more patchy and localized than recent days, before
becoming more widespread again by Wednesday and Thursday.

Isolated but mostly dry thunderstorms will be possible Wednesday
or Thursday.

Discussion High pressure has provided another seasonably sunny
and dry day across all of inland northwest california, with a
shallow marine layer keeping coastal areas cooler, with some
persistent fog along many of the beaches. Temperatures are running
pretty close to yesterday's readings at the coast, with the
exception being in some areas where fog has been more persistent,
keeping readings a bit cooler. Inland, much of the region is
several degrees warmer than yesterday, with inland valley areas in
the 90s set to peak near 100 in the hottest spots. The warming
trend is set to continue through Tuesday, as a strong mid and
upper-level ridge builds northward over our area. Previous
forecast highs remain essentially the same, with 100 to 107 degree
readings expected Monday and Tuesday for much of the interior
valleys. The ridge will retreat toward the intermountain west
later this week, with gradually 'cooling' back into the 90s for
highs. Along the coast, have kept forecast readings the same as
the previous forecast package as well, however there is a lower
degree of confidence in the low to mid 70s for Monday and Tuesday
highs. While offshore flow will develop above the boundary layer,
that may only serve to strengthen the inversion in place and make
whatever stratus and fog we have more stubborn, especially to the
south of CAPE mendocino where the current extent of stratus is
much greater. As the surface thermal trough does shift offshore on
Tuesday, there may be a brief period where the marine layer around
humboldt bay is scoured out and allows for warming, before winds
turn back onshore. A reinforcing southerly surge of stratus will
likely increase the coverage of low clouds and fog along the
mendocino coast and offshore on Tuesday, with a return to more
widespread and persistent overnight and morning clouds and fog for
the rest of the week.

The other forecast challenge will continue to be any isolated
thunderstorm threat Tuesday night through Wednesday night, as an
elevated layer of moisture in association with the remnants of
'ivo'. The degree of moisture and instability with this system
remains in question, though current model guidance continues to
support enough of a threat to keep the isolated dry thunderstorms
we have in the forecast. The best chance may be found over the
trinity alps and the siskiyou wilderness Wednesday afternoon.

Aside from any localized rainfall with any thunderstorm that does
manage to develop that time period, dry weather is expected for
our area through next week.

Aviation Areas of coastal stratus will continue to affect
coastal areas through Monday, while inland areas will remain clear
andVFR. The forecast at cec contains a high degree of
uncertainty, as southerly winds may allow redeveloping stratus to
the south to creep northward. The stratus may be thinner and less
persistent than today, but some fog cannot be ruled out early
Monday morning. Confidence is greater in a period of lifr
conditions and fog at acv after 06z tonight, though the afternoon
hours Tuesday should turn out mostly sunny.

Marine Fresh to strong northerlies are present across the outer
waters this afternoon with light southerlies along the coast. Wind
waves are still dominating the sea state ranging from 4 to 8 feet
across the waters this afternoon however a southerly (2ft at 15 sec)
and westerly (3-4ft at 12 sec) swell are also moving through the
waters. Northerly winds will continue to increase this evening
across the outer waters, as well as near CAPE mendocino and point
saint george. These increasing northerlies will lead to a ramp up in
wind driven seas to 10 to 13 ft by late tonight into Monday across
the northern outer waters. Higher seas will also propagate into the
southern outer waters with wind waves of 6 to 10 feet. The inner
waters will primarily see light northerly winds develop tonight
(except for near CAPE mendocino and point saint george as mentioned
above). However, larger wind waves from the outer waters will
propagate into the inner waters late tonight into Monday. At this
time, it appears that the wind waves will remain just below small
craft advisory criteria for the inner waters therefore no small
craft advisory has been issued.

An upper level trough will approach the area Monday night into
Tuesday allowing the pressure gradient to relax and hence the
northerly winds and seas will quickly diminish. This trough will
also be responsible for the formation of widespread gentle to
moderate southerly winds and calmer seas through the end of the
week. Wci

Fire weather Seasonably hot weather will continue Sunday, with
temperatures peaking on Monday and Tuesday. Inland afternoon high
temperatures are likely to climb from the mid to upper 90s today,
to between 100 and 107 degrees Monday and Tuesday. In addition to
the increasing heat, humidity will also decrease, with low
afternoon minimums expected and moderate to poor overnight
recoveries. While winds are not expected to be particularly
strong on a large scale, gusty offshore winds are expected to
develop Sunday night and Monday morning across primarily the upper
elevations of del norte county. This combination of gusty winds
and poor overnight recoveries may result in elevated conditions
Sunday night in those areas. Otherwise, winds will remain
generally light and dominated by daytime onshore nighttime
offshore flow that is significantly augmented by local terrain.

Meanwhile, little to no wetting precipitation is expected for the
foreseeable future. However, the probability of isolated and
mostly dry thunderstorms appears to be increasing slightly across
parts of northwest california toward the middle of the week. Latest
trends suggest that the most likely day for any local lightning
strikes is looking like Wednesday. Brc

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until 9 am pdt
Tuesday for pzz470-475.

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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 mi40 min 56°F1014.3 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi46 min 56°F9 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 22 mi26 min N 5.8 G 7.8 56°F8 ft1014.7 hPa
46213 - Cape Mendocino, CA (094) 47 mi16 min 64°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 mi2.4 hrsSE 310.00 miFair54°F50°F87%1015.2 hPa
Fortuna Rohnerville Airport, CA18 mi3 hrsN 08.00 miFair54°F53°F100%1015.2 hPa

Link to 5 minute data for KACV

Wind History from ACV (wind in knots)
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Last 24hrSE3S6E4S4CalmE3CalmCalmNW7NW7W6NW6NW5NW5NW6NW4CalmS3CalmCalmCalmSE3CalmCalm
1 day agoS5SE4SE3CalmE3CalmCalmCalm4W5W5S6NW7NW6NW8NW6NW5CalmCalmSE4CalmSE3CalmCalm
2 days agoSE3CalmCalmE3CalmCalmCalmW5CalmNW6NW6NW8NW6NW7NW8NW7CalmSW4SW3SE3S3SE6S5S8

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
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Mon -- 02:06 AM PDT     Moonrise
Mon -- 03:31 AM PDT     0.01 feet Low Tide
Mon -- 06:37 AM PDT     Sunrise
Mon -- 10:47 AM PDT     5.40 feet High Tide
Mon -- 03:00 PM PDT     3.28 feet Low Tide
Mon -- 05:28 PM PDT     Moonset
Mon -- 07:58 PM PDT     Sunset
Mon -- 09:28 PM PDT     7.81 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.92.30.90.10.10.61.62.73.84.75.35.454.33.63.33.54.25.26.37.27.77.77

Tide / Current Tables for Humboldt Bay (south jetty), California (expired 1984-12-31)
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Humboldt Bay (south jetty)
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Mon -- 02:07 AM PDT     Moonrise
Mon -- 03:39 AM PDT     -0.00 feet Low Tide
Mon -- 06:37 AM PDT     Sunrise
Mon -- 10:25 AM PDT     4.41 feet High Tide
Mon -- 03:04 PM PDT     2.93 feet Low Tide
Mon -- 05:28 PM PDT     Moonset
Mon -- 07:58 PM PDT     Sunset
Mon -- 09:07 PM PDT     6.61 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.21.90.80.100.51.42.43.344.44.443.63.12.93.13.74.65.56.36.66.45.7

Weather Map and Satellite Images
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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 (5,6,7,8)
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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.