Thursday, October18, 2018 L-36.com


Marine Weather and Tides
Fields Landing, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:31AMSunset 6:32PM Thursday October 18, 2018 7:20 PM PDT (02:20 UTC) Moonrise 2:56PMMoonset 12:23AM Illumination 71% Phase: Waxing Gibbous; Moon at 9 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 253 Pm Pdt Thu Oct 18 2018
Synopsis for northern california waters..Light northerly winds will continue through the weekend. Otherwise, a long period west-northwesterly swell will persist into Friday, while a south-southwesterly swell continues through the weekend. In the extended range, a weak cold front is forecast to move across the region next Tuesday and Wednesday.


7 Day Forecast for Marine Location Near Fields Landing, CA
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location: 40.77, -124.25     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 182238
afdeka
area forecast discussion
national weather service eureka ca
338 pm pdt Thu oct 18 2018

Synopsis High pressure will result in dry and warm afternoons
accompanied by chilly nights persisting into the weekend across
interior northwest california. Meanwhile, periods of low clouds
and cool temperatures are expected along the coast. Rain chances
will increase later on Tuesday as a cold front approaches.

Discussion A blocked upper-level pattern will keep stagnant
weather across northwest california through Sunday. The center of
an upper-level high will drift eastward across oregon on Friday
and Saturday, resulting in warm air aloft above a steep subsidence
inversion. Easterly, offshore flow will be present over inland
areas, while a shallow marine layer keeps persistent cloudiness
along much of the coast. The dry air and clear skies will mean
another frosty night for the colder interior valleys, where a
frost advisory is in effect. Expect low temperatures Friday
morning to be very similar to this morning's readings.

The stratus has actually peeled back away from inland areas, but
many locations within a half mile of the pacific continue to have
fog and low clouds this afternoon. With warming aloft under the
building upper high, would expect the marine layer to even be a
bit shallower tonight, with perhaps a bit less inland extent.

Friday there may be a little more sunshine away from the immediate
coast, while many beach locations remain cloudy. Northerly winds
may be a touch stronger at exposed coastal locations, but light
elsewhere once again. Friday night into Saturday morning will see
some locally enhanced easterly winds over upper slopes and ridges.

Heading into the weekend, the upper-level high will weaken,
resulting in cooling temperatures aloft, and inland high temps
slipping back closer to normal readings. Coastal clouds will
continue to be present this weekend, and while right now we are
forecasting some afternoon clearing, do not have much confidence
in that given the light wind flow both at the surface and aloft.

Model guidance continues to show a pattern change taking place
heading into next week. A cold upper trough is forecast to deepen
over the gulf of alaska, which will aid in breaking down the
upper ridge and kicking out a cut-off low to our south. A
shortwave trough and associated surface front are then forecast
to move east across the pac NW during Tuesday. This wave appears
to weaken considerably, though may yield some light rain for
del norte and humboldt counties later on Tuesday or Tuesday night.

An upper-level high to the west of california will try to build a
bit, keep the bulk of the moisture directed near or north of cape
mendocino. Details regarding the strength of this high as will as
strength and timing of waves of low pressure tracking eastward
into the pacific northwest are yet to be resolved by the models,
and thus while the sensible weather looks damp mid to late next
week, just how damp remains uncertain. Aad

Aviation Coast side a firmly entrenched stratus deck is
providing mainly MVFR CIGS to near coast terminals this afternoon.

Only brief and local improvement is expected over the next few
hours before CIGS and vsbys drop back to near ifr conditions which
should persist through the night. Interior sites should remain
vfr for much of the TAF cycle with some localized MVFR or ifr vsby
and CIGS during the hours just before sunrise across local
interior and coastal interior valleys.

Marine Light northerly winds will continue through the end of
the weekend as weak high pressure remains over the eastern pacific.

A long period northwesterly swell, long period southerly swell, and
northerly wind chop will create the total sea state through the end
of the weekend. The dominant wave group will be the westerly swell
which will peak at 7 feet at around 15 seconds tonight and then
gradually subside through the weekend. Next week as a system
approaches the coast, southerly winds will develop and another
northwesterly swell will begin to impact the waters. Wci jt

Fire weather Warm temperatures and low humidity values will
persist across the interior through the weekend. Winds will be
largely light and terrain-driven, but will tend east-northeasterly
over the exposed ridges and upper slopes in the thermal belt. This
will be especially true Friday night into Saturday morning, with
some local gusts up to 25 mph. Do not anticipate red flag
conditions, but will headline in the fwf. In the extended range,
rain chances will increase later Tuesday, especially north of
mendocino county.

Eka watches warnings advisories
Ca... Frost advisory from 1 am to 9 am pdt Friday for caz102-104-106-
110-111.

Northwest california coastal waters... None.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
HBYC1 - 9418767 - North Spit, CA 2 mi45 min NNE 8.9 G 11 51°F 53°F1022.3 hPa
46244 - Humboldt Bay, North Spit, CA 10 mi21 min 53°F7 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 15 mi31 min NNE 9.7 G 14 53°F 52°F6 ft1022.2 hPa53°F
46213 - Cape Mendocino, CA (094) 42 mi21 min 57°F8 ft

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fortuna Rohnerville Airport, CA16 mi46 minWNW 87.00 miPartly Cloudy50°F48°F94%1021.7 hPa
Arcata / Eureka, Arcata Airport, CA17 mi28 minN 08.00 miA Few Clouds49°F48°F97%1022.1 hPa

Wind History from FOT (wind in knots)
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Last 24hrN5N3CalmCalmW3CalmCalmCalmNW3S4SE6SE10N5N3CalmSE6CalmNW13NW10W8NW8W12W10
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1 day agoW7CalmS4SE4SE4NW3CalmCalmSE6SE6SE6S4SW3S4SE3N3NW6NW5NW11NW15N12NW9NW5NW6
2 days agoCalmSE6SE7SE7S8SE6S7SE8SE9SE10SE11SE5SE6SE7SE7CalmN3NW5NW7W11W11NW11W11W10

Tide / Current Tables for Humboldt Bay Entrance, California
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Humboldt Bay Entrance
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Thu -- 01:24 AM PDT     Moonset
Thu -- 02:03 AM PDT     0.94 feet Low Tide
Thu -- 07:31 AM PDT     Sunrise
Thu -- 08:58 AM PDT     4.71 feet High Tide
Thu -- 02:30 PM PDT     3.24 feet Low Tide
Thu -- 03:55 PM PDT     Moonrise
Thu -- 06:31 PM PDT     Sunset
Thu -- 07:59 PM PDT     4.78 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.10.91.11.72.53.344.54.74.64.33.93.53.33.33.53.94.34.64.84.64.13.4

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
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Thu -- 01:23 AM PDT     Moonset
Thu -- 02:08 AM PDT     0.95 feet Low Tide
Thu -- 07:31 AM PDT     Sunrise
Thu -- 09:39 AM PDT     5.90 feet High Tide
Thu -- 02:35 PM PDT     3.31 feet Low Tide
Thu -- 03:55 PM PDT     Moonrise
Thu -- 06:31 PM PDT     Sunset
Thu -- 08:40 PM PDT     5.97 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.21.311.11.72.63.64.65.45.85.95.44.73.93.43.33.74.24.95.55.95.95.54.7

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 (22,6,7,8)
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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.