Tuesday, November20, 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 7:09AMSunset 4:55PM Tuesday November 20, 2018 6:27 AM PST (14:27 UTC) Moonrise 3:54PMMoonset 4:08AM Illumination 94% Phase: Waxing Gibbous; Moon at 12 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 241 Am Pst Tue Nov 20 2018
Synopsis for northern california waters..Southerly winds increase across the area this afternoon ahead of a cold front which will move across the waters early Wednesday. A second, stronger front will arrive on Thursday, with gales possible for the northern waters. Thunderstorms are possible late on Wednesday. A mid-period W to nw swell will persist through Tuesday, with another swell train arriving Tuesday night.


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 201243
afdeka
area forecast discussion
national weather service eureka ca
443 am pst Tue nov 20 2018

Synopsis Dry, mild, and hazy conditions will continue through
this evening with breezy southeasterly ridge top winds developing. Significant
rains will return to the area late this evening and persist
through Friday with breezy southerly winds.

Discussion Poor air quality and hazy conditions will continue
for just one more day before widespread rain returns to the area
late this evening into early tomorrow morning. Ahead of this cold
front, southerly winds will begin to increase across the area. A
few raws sites such as kneeland, cooskie mountain, and ship
mountain have begun reporting southeasterly winds near 20 mph
early this morning. These winds will continue to increase as we
go through the day. With the enhanced southeasterly winds some
downsloping may become evident for the humboldt bay area which may
warm temperatures into the low to mid 60's.

Significant precipitation will return to the north coast late
this evening and last into Wednesday. Widespread light to moderate
rain will lead to half an inch to an inch of precipitation area
wide. Once the front slides by a more convective situation will
develop as cold temperatures aloft move in. With this showery
activity a modest amount of MUCAPE along with steep lapse rates
mean that a few lightning strikes may be possible across the
waters and coastal locations. Any thunderstorm or stronger shower
that develops would be capable of producing gusty localized
winds due to the fairly strong winds aloft and unstable profile.

With the cold airmass aloft the stronger showers may also produce
some small hail.

The heaviest batch of precipitation is expected to move north to
south during the afternoon of thanksgiving day into Friday morning.

Current indications are that a moisture plume will be oriented
perpendicular to our coastline which will help to enhance rainfall
totals on the windward (ocean) side of coastal mountains. Latest
model guidance has increased the ivt amounts within this system as
well as the residence time over our area to approximately 24
hours which means even heavier precipitation can be expected than
originally thought. From Thursday afternoon to Friday morning
most locations can expect to see upwards of 2 inches of
precipitation. Areas with favorable topography could see totals
during this time period upwards of 6 inches. Fortunately, rivers
and streams are currently running well below normal so they will
be able to handle a lot of this rain however some urban or small
creek flooding may be possible. For mountain locations, it
appears that snow levels will remain above 5000 feet during this
event which means only scott mountain pass on hwy 3 will see
accumulating snow.

Strong southerly winds will also peak Thursday afternoon and evening
with area ridges experiencing gusts in excess of 35 mph. Since this
is the first strong southerly wind event of the season these winds
may bring some tree limbs down and cause sporadic power outages,
therefore a wind advisory may be required.

Looking into the long term the active weather pattern appears to continue
as weak disturbances continue to impact our area this weekend and
into early next week. While exact timing and strength is still a
bit in question it appears only minimal impacts will be
associated with these features. Wci

Aviation Southeast winds ahead of a cold front are keeping most
of the areaVFR this morning. There is is still some lingering haze
in the ukiah area, but farther north the vis has lifted toVFR.

Southeast winds have increased over the higher elevations this
morning and this will expand to include most areas this afternoon.

Speeds are expected to only reach around 10 kt with some gusts to 15
or possibly as high as 20 kt this evening. Rain is expected to start
at kcec shortly before 12z and will likely be after 12z for kacv and
even later for kuki. Mkk

Marine Currently the seas are fairly quiet across the area this
morning. There is a swell of around 2 to 3 feet at 11 seconds. An
approaching cold front has just started to increase the southerly
winds in the outer waters. The winds are expected to increase to 10
to 20 kt this afternoon. These will continue to increase tonight,
peaking Wednesday morning. A few gale force gusts are possible in
the northern outer waters, but most areas will peak at 25 to 30 kt.

The winds will generally be out of the south to southeast and this
will limit the waves building in the northern inner waters (zone
450)and it will be protected somewhat from the winds. For now have
held off on issuing a small craft advisory for the zone 450.

Late Wednesday afternoon and evening the winds will diminish for the
most part so have end the small craft advisory. There will be
showers around and these could bring down some stronger winds to the
surface. Local gusts to 30 mph are possible in the heavier showers.

The next system moves into the area Thursday afternoon and Thursday
night. Models continue to show this system as stronger than the
first. The northern outer waters (zone 470) are looking more like
there will be gales or at least gale force gusts. This may need a
gale watch, but will wait for a few more model runs to make sure the
models are consistent.

In addition to the winds a large swell is expected to build into the
waters starting Tuesday night. Initially it is expected to around 3
feet at 16 seconds on Wednesday. The current enp run shows this
building to 7 to 9 feet at 12 seconds on Thursday afternoon.

Thursday night and Friday the winds increase and the wind driven
waves will combine with the swell for total wave heights of around
12 to 14 feet at 12 to 14 seconds. Saturday the winds will diminish
and the waves will become less steep.

Models continue to struggle with the timing of a weak system over
the weekend. The ECMWF has a weak system on Sunday bringing light
southerly winds while the 06z GFS brings this system in on
Tuesday and has light northerly winds on the weekend. Mkk

Fire weather A dry air mass with breezy southeasterly ridge top winds
will lead to elevated to locally critical fire weather conditions
today ahead of an approaching cold front. Humidity will increase
rapidly tonight, as the first round of significant wetting rains
return to the area. The strongest winds and heaviest rain will
occur Thursday afternoon into Friday morning.

Eka watches warnings advisories
Ca... Frost advisory until 9 am pst this morning for caz102-103-109-
112.

Flash flood watch from Wednesday afternoon through Friday
morning for caz107-110-113.

Northwest california coastal waters... Small craft advisory from 3 pm this afternoon to 3 pm pst
Wednesday for pzz470-475.

Small craft advisory from 2 am to 3 pm pst Wednesday for pzz455.

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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 mi51 min SSE 7 G 8.9 47°F 51°F1014.1 hPa
46244 - Humboldt Bay, North Spit, CA 10 mi57 min 52°F3 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 15 mi67 min ESE 7.8 G 9.7 52°F1014.2 hPa
46213 - Cape Mendocino, CA (094) 42 mi57 min 53°F3 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 mi32 minSSE 910.00 miFair39°F32°F75%1013.9 hPa
Arcata / Eureka, Arcata Airport, CA17 mi34 minN 010.00 miFair37°F35°F93%1014.1 hPa

Wind History from FOT (wind in knots)
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Last 24hrSE9SE10SE6SE7SE4S4W3NW7NW4NW3CalmS3SE6SE8SE9SE9SE8SE9SE8SE9SE6SE6SE10SE7
1 day agoSE4SE4SE5CalmSW3N3NW5NW8NW7NW6W5W3SE3SE5SE7SE9SE7SE8SE7S6SE8SE10SE8SE11
2 days agoSE7SE9SE5NW5NW4NW10NW9NW7NW6NW5W6W3CalmCalmCalmCalmCalmCalmCalmCalmCalmSE4SE5SE3

Tide / Current Tables for Humboldt Bay Entrance, California
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Humboldt Bay Entrance
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Tue -- 03:14 AM PST     1.66 feet Low Tide
Tue -- 04:08 AM PST     Moonset
Tue -- 07:09 AM PST     Sunrise
Tue -- 09:21 AM PST     6.26 feet High Tide
Tue -- 03:53 PM PST     Moonrise
Tue -- 04:12 PM PST     0.50 feet Low Tide
Tue -- 04:55 PM PST     Sunset
Tue -- 10:13 PM PST     4.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.52.721.71.82.53.64.85.76.26.15.54.53.21.90.90.50.71.52.53.64.44.84.7

Tide / Current Tables for Hookton Slough, Humboldt Bay, California
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Hookton Slough
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Tue -- 03:32 AM PST     1.66 feet Low Tide
Tue -- 04:08 AM PST     Moonset
Tue -- 07:09 AM PST     Sunrise
Tue -- 09:45 AM PST     6.76 feet High Tide
Tue -- 03:53 PM PST     Moonrise
Tue -- 04:30 PM PST     0.50 feet Low Tide
Tue -- 04:55 PM PST     Sunset
Tue -- 10:37 PM PST     5.33 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.13.12.31.71.72.33.44.75.86.66.76.35.33.92.41.30.60.61.22.33.64.65.25.3

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 (9,2,3,4)
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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.