Thursday, April18, 2019 L-36.com


Marine Weather and Tides
Myrtle, 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 6:31AMSunset 8:00PM Thursday April 18, 2019 10:15 AM PDT (17:15 UTC) Moonrise 6:21PMMoonset 5:31AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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 901 Am Pdt Thu Apr 18 2019
Synopsis for northern california waters..Light to moderate northwest breezes and a northwest swell will prevail across the coastal waters through the rest of the week. Northerly gales are possible this weekend, with steep short-period seas expected to develop as a result.


7 Day Forecast for Marine Location Near Myrtle, CA
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location: 40.8, -124.14     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 181206
afdeka
area forecast discussion
national weather service eureka ca
506 am pdt Thu apr 18 2019

Synopsis Warmer weather is expected across the interior today.

A weak trough will bring a slight chance of showers Friday
through Saturday, followed by dry weather and a new warming trend
Sunday through early next week.

Discussion Satellite imagery showed stratus blossoming over
and offshore the north coast early this morning. The status
should erode this afternoon, but then quickly reform this
evening and expand overnight. The marine layer was around 1500
feet this morning and will probably deepen on Friday as a mid
level trough approaches the coast. The deeper layer, thicker
clouds and an onshore NW flow will ensure cloud cover persisting
over the north coast through the day on Friday.

Deterministic models have been consistently indicating precip
potential with the incoming trough on Friday. Some instability
will develop with daytime heating across the interior on Friday
and a few isolated lightning strikes will be possible, though
not very likely, over far NE trinity county. Bufkit soundings
and convective indices were not very impressive, however sref
(short range ensemble forecast) calibrated probability of
thunderstorms increases to around 20% late Friday afternoon. The
threat may persist into the early morning hours of Saturday as the
500mb cold pool drops over the area from the nw.

Temperatures have warmed up substantially at many higher elevations
raws overnight. Expect highs to reach the 80s in the interior
valleys today under bright april sunshine. Unfortunately, coastal
areas will not see any warming today due to the marine stratus.

The mendocino coast stands the best chance of warming into at
least the 60s today. Even though high temperatures will start a
downward trend on Friday, it will still be well above normal in
many of the interior valleys. More substantial cooling is expected
on Saturday with readings near to slighlty below normal.

Ridging aloft is expected to return on Sunday with start of another
warm up that will last into the early portion of next week. Temperatures
should once again reach the 80s, in the interior valleys. A few sites
may even hit the lower 90s, however confidence is not high at the
moment. As for precip chances, it is not looking very promising
for any precip through mid next week. Ensemble blend indicates
low precip chances late next week, however the ridge is firmly in
place and it may end up remaining dry through the end of next week.

Aviation Marine stratus developed along the coast overnight from
point saint george down to CAPE mendocino. Both coastal terminals
experienced lifr conditions as a result. Expect lifr to ifr
conditions to continue along the coast through mid-morning before
clearing out late this morning. MostlyVFR conditions should return
by this afternoon and expected to persist through this evening. Low
clouds will be possible through the morning across the interior,
with mostlyVFR conditions expected through tonight at interior
terminals.

Marine Light to moderate northerlies will persist through Friday
morning, with winds expected to be a little stronger south of cape
mendocino. Northerlies will begin to increase Friday afternoon and
continue to increase to gale force in strength on Saturday. A gale
watch or warning will likely be issued this afternoon for the outer
waters. Winds will remain elevated through early Sunday and are
forecast to weaken throughout the day on Sunday. Steep, short-period
seas will develop as a result of the increasing northerlies.

Additionally, a long-period northwest swell has moved through the
coastal waters. This swell will persist through Friday before
weakening this weekend.

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory from 2 pm to 11 pm pdt Friday for pzz455-
470.

Small craft advisory from 8 am to 11 pm 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 mi40 min 53°F1021.6 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi46 min 54°F7 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 21 mi26 min N 7.8 G 9.7 55°F8 ft1021.8 hPa
46213 - Cape Mendocino, CA (094) 47 mi106 min 54°F9 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 mi23 minNW 55.00 miFog/Mist51°F50°F96%1021.6 hPa
Fortuna Rohnerville Airport, CA17 mi21 minSSE 310.00 miFair57°F53°F88%1021.3 hPa

Wind History from ACV (wind in knots)
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Last 24hrNW7NW15NW15NW16NW17NW15
G22
NW14NW13NW11N10N6NE3CalmCalmCalmNE3CalmCalmE3CalmCalmCalmCalmNW5
1 day agoW5W5W8NW8NW9NW9NW11NW10NW10N8NW6CalmCalmNE3NE3CalmNE4NE5E3NE3E3E3NE3NW6
2 days agoSE3W5SE4SE10SE8S11S12S13S6SW5SW9W4SE3CalmSE3E3CalmE3S4SE3NW5E3E3W4

Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
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Thu -- 12:15 AM PDT     7.96 feet High Tide
Thu -- 06:06 AM PDT     0.34 feet Low Tide
Thu -- 06:30 AM PDT     Moonset
Thu -- 06:33 AM PDT     Sunrise
Thu -- 12:38 PM PDT     7.37 feet High Tide
Thu -- 06:14 PM PDT     0.56 feet Low Tide
Thu -- 07:21 PM PDT     Moonrise
Thu -- 07:59 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.97.76.54.62.610.30.71.83.34.96.47.27.36.54.931.40.60.81.83.45.26.9

Tide / Current Tables for Humboldt Bay Entrance, California
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Humboldt Bay Entrance
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Thu -- 06:01 AM PDT     0.33 feet Low Tide
Thu -- 06:31 AM PDT     Moonset
Thu -- 06:33 AM PDT     Sunrise
Thu -- 11:57 AM PDT     6.06 feet High Tide
Thu -- 06:09 PM PDT     0.55 feet Low Tide
Thu -- 07:21 PM PDT     Moonrise
Thu -- 07:59 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.55.94.73.21.70.70.30.71.83.34.75.76.15.74.83.42.110.60.91.93.55.16.3

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 (13,3,4,5)
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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.