Thursday, July19, 2018 L-36.com


Marine Weather and Tides
Eureka, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 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.

Sunrise 5:59AMSunset 8:46PM Wednesday July 18, 2018 11:06 PM PDT (06:06 UTC) Moonrise 11:32AMMoonset 11:40PM Illumination 37% 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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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 826 Pm Pdt Wed Jul 18 2018
Synopsis for northern california waters..Northerly gale force winds will impact the outer waters through the rest of the week. Steep wind driven waves will persist as well, with the largest seas across the northern outer waters. Conditions will begin to settle late in the weekend.

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 182207
afdeka
area forecast discussion
national weather service eureka ca
307 pm pdt Wed jul 18 2018

Synopsis Hot conditions will continue through Thursday, cool
only slightly over the weekend, and heat back up next week. A few
thunderstorms will be possible across mainly interior areas
Friday, Saturday and Sunday in the afternoon and evening. Typical
conditions will continue along the coast.

Discussion Hot conditions continue throughout the interior
today thanks to persistent high pressure aloft. Temperatures
throughout interior valleys have already eclipsed 100 degrees as
of 1 pm in many areas, and will continue to warm a few more
degrees through the late afternoon. Meanwhile at the coast, marine
clouds have finally dissipated across most land areas but it
remains very near the beach. These clouds will likely move back
inland quickly in the late evening, and continue to result in
overcast skies through at least sometime tomorrow morning. More of
the same can be expected throughout the area tomorrow as well,
with similar high inland temperatures and typical cool conditions
along the coast. A heat advisory remains in effect for trinity
county through the evening tomorrow as a result.

On Friday, a cutoff low pressure system will gradually begin to
move northward through the offshore waters of california, which
will initially help to weaken the ridge of high pressure and allow
temperatures to drop slightly to still-warm but closer to average
temperatures over the weekend. This will also place the region
within a regime of southerly flow aloft, allowing substantial mid-
level monsoonal moisture to stream northward into northern
california. Precipitable water values of 1.1 to 1.5 inches will be
well above seasonal averages, despite the presence of a dry layer
of air in the low levels. Meanwhile, model forecasts also
indicate the presence of moderate mid-level instability arriving
in mendocino county late in the day Friday, and this may be enough
to generate a few mostly dry showers and perhaps a few strikes of
lightning. Slight chances of thunderstorms will also exist across
the interior mountains of mendocino and trinity counties Saturday
and Sunday afternoons.

Monday and beyond, thunderstorm chances will decrease, and
building high pressure will likely result in a gradual increase in
temperatures through the middle and possibly the end of next
week. Brc

Aviation Stratus has been slowly eroding today. Confidence is
not high it will clear out and goVFR for very long at the coastal
terminals this afternoon and evening. Guidance indicates ifr
returning to the coastal terminals this evening as a shallow layer
of stratus advects back onshore.

The greatest potential for sustained ifr tonight looks to be at
kacv. A low and tight marine inversion will persist over kacv into
thu morning. Expect low clouds and fog to impact kacv with ifr to
lifr conditions through the morning hours on thu. Slightly
stronger mixing on Thu should result in improvement for the
afternoon hours, though a few patches may linger near the
shoreline through the afternoon around kacv.

High resolution models indicate less potential for low clouds and
fog in the vicinity of kcec tonight due to stronger northeasterly
winds above the marine inversion. With a southerly wind reversal
developing nearshore tonight expect stratus to advect back into
kcec again, however. Stronger northerlies should result in better
chances for longer lastingVFR at kcec Thu afternoon.

At kuki,VFR is expected tonight through thu.

Marine Strengthening northerly winds will continue to impact
the waters through the rest of the work week and gradually
diminish late this weekend. Late morning satellite imagery showed
winds speeds in the 20-30 knots range across the outer waters.

Winds should continue to increase through Thursday, with the gale
watch upgraded to a gale warning starting Thursday afternoon.

Strongest winds and highest seas are expected to be across the
northern outer waters with wave heights reaching near 15 feet. The
small craft advisory remains in effect across the northern inner
waters and opted to issue one for the southern inner waters with
gusty winds expected in the vicinity of CAPE menocino.

Fire weather Above normal temperatures and dry conditions will
continue through Thursday, complete with poor ridgetop humidity
recoveries. Breezy nocturnal offshore winds can also be expected
overnight tonight and again overnight Friday as well, mostly
across the ridges of del norte and far northern humboldt
counties. Temperatures will cool slightly Friday through the
weekend, but will remain warm and near to slightly above normal.

Isolated and mostly dry thunderstorms will be possible Friday
afternoon and evening across primarily mendocino county. Isolated
thunderstorms will again be possible across the mountains of
eastern trinity and northeastern mendocino counties again Saturday
and Sunday afternoons. Brc

Eka watches warnings advisories
Ca... Heat advisory until 9 pm pdt Thursday for caz107-108-111.

Heat advisory until 8 pm pdt this evening for caz102-105-110-113.

Northwest california coastal waters... Small craft advisory until 4 am pdt Saturday for pzz450.

Small craft advisory until 4 am pdt Friday for pzz455.

Small craft advisory until 3 pm pdt this afternoon for pzz470.

Gale warning until 4 am pdt Saturday for pzz470.

Small craft advisory until 11 am pdt Thursday for pzz475.

Gale warning from 11 am Thursday to 4 am pdt Friday 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 mi90 min NW 8 G 8.9 55°F 54°F1017.6 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi36 min 54°F10 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 22 mi26 min NNW 7.8 G 12 55°F 1017.8 hPa55°F
46213 - Cape Mendocino, CA (094) 47 mi36 min 52°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 mi73 minSSE 58.00 miOvercast55°F54°F96%1017.3 hPa
Fortuna Rohnerville Airport, CA18 mi71 minNW 37.00 miOvercast55°F53°F94%1017.6 hPa

Wind History from ACV (wind in knots)
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Last 24hrS5S6S3S6SE5SE3CalmNW5CalmCalmW4W45NW5W6NW6NW7NW6NW7W6W4S5SE5S6
1 day agoS4CalmW3CalmW3CalmSE3CalmCalmSW3W333NW9NW10NW7NW6W43SW3CalmSE6CalmSE4
2 days agoCalmCalmCalmCalmCalmCalmN3CalmCalmCalm3W4SW5W6W5W5W6NW7W5SW6W3S5S5S4

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
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Thu -- 12:39 AM PDT     Moonset
Thu -- 05:59 AM PDT     5.83 feet High Tide
Thu -- 06:01 AM PDT     Sunrise
Thu -- 11:50 AM PDT     0.91 feet Low Tide
Thu -- 12:53 PM PDT     First Quarter
Thu -- 01:36 PM PDT     Moonrise
Thu -- 06:52 PM PDT     7.26 feet High Tide
Thu -- 08:43 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.72.12.93.84.85.55.85.54.63.32.11.20.91.42.33.656.277.36.85.74.42.9

Tide / Current Tables for Fields Landing, Humboldt Bay, California
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Fields Landing
Click for Map
Thu -- 12:40 AM PDT     Moonset
Thu -- 05:25 AM PDT     5.34 feet High Tide
Thu -- 06:01 AM PDT     Sunrise
Thu -- 11:35 AM PDT     0.88 feet Low Tide
Thu -- 12:53 PM PDT     First Quarter
Thu -- 01:36 PM PDT     Moonrise
Thu -- 06:18 PM PDT     6.65 feet High Tide
Thu -- 08:44 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.72.2344.85.35.24.73.72.61.610.91.52.63.85.16.16.66.55.84.83.52.4

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 (2,6,7,8)
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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.