Saturday, May27, 2017 L-36.com


Marine Weather and Tides
Myrtle, CA

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:47AMSunset 8:40PM Saturday May 27, 2017 2:52 AM PDT (09:52 UTC) Moonrise 6:55AMMoonset 9:51PM Illumination 4% Phase: Waxing Crescent; Moon at 2 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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This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ410 1227 pm pdt Wed apr 19 2017 a marine weather statement has been issued for the following areas... Coastal waters from cape mendocino to pt. Arena ca out 10 nm... Coastal waters from pt. St. George to cape mendocino ca out 10 nm... Humboldt bay bar... Waters from cape mendocino to pt. Arena ca from 10 to 60 nm... Waters from pt. St. George to cape mendocino ca from 10 to 60 nm... Scattered Thunderstorms will continue to develop through 3 pm. The main storm hazards will be dangerous cloud to water lightnig...wind gusts to 40 knots or more...small hail...and waterspouts. 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.ground 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 4174 12417 4156 12410 4150 12398 4153 12407 4154 12408 4089 12413 4076 12423 4087 12414 4085 12409 4083 12408 4065 12431 4060 12416 4051 12413 4063 12432 4043 12441 4044 12581 4129 12555 4168 12568 4178 12579
PZZ400 811 Pm Pdt Fri May 26 2017
Synopsis for northern california waters..Broad low pressure will remain over the waters through Sat maintaining light winds and low seas. Light northerly winds will return on Sun and then increase on Mon as high pressure rebuilds toward the coast.

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 262253
afdeka
area forecast discussion
national weather service eureka ca
353 pm pdt Fri may 26 2017

Synopsis
Temperatures will continue to warm over the next few days, with warm
temperatures likely across the interior, and seasonably warm
readings near the coast. Some coastal river valley stratus will
develop during the late night early morning hours through the
weekend. Isolated thunderstorms may develop across the interior
through much of the upcoming week, especially for trinity county.

Discussion
Short term
(tonight through Saturday night)
clouds have been very persist all day over the waters, near the
coast, and across most of mendocino county. Farther ease, a cumulus
field was developing across the interior mountains. The clouds near
the redwood coast have been reinforced by a nice meso low that has
been seen spinning about 20 to 30 miles west of humboldt bay, with a
smaller meso low rotating around it (fujiwhara effect).

With little change in the synoptic pattern and the persistence the
stratus has shown the last few days, look for a repeat performance
the next couple of mornings. Sky cover was adjusted in the grids to
account for this, especially across the southwestern two-thirds of
mendocino county. Otherwise, as the upper ridge continues to
strengthen, heights aloft will continue to rise, with the net effect
being increased warming over the next few days. Highs will climb
into the 80s for the interior, with a few locations popping into the 90s. Lows at night will temperatures will continue to warm over the next few days, with warm temperatures likely across the interior, and seasonably warm readings near the coast. Some coastal river valley stratus will develop during the late night early morning hours through the weekend. Isolated thunderstorms may develop across the interior through much of the upcoming week, especially for trinity county. Be fairly pleasant for this time of year as well.

Long term
(Sunday through Friday)
a summer-like pattern will make an appearance for the end of the
holiday weekend and persist through much of the upcoming week. The
numerical models have come into better agreement with the overall
theme, which features a ridge axis to the east, with warm
temperatures and isolated convection developing across portions of
the interior. For Sunday and memorial day, the tail end of an upper-
level trough will begin to approach the region from the northwest. A
few vort maxes are seen in the data (especially the gfs) crossing
the region during peak heating Sunday and more so on Monday. This,
combined with a favorably southeast to south low-level flow, may
allow a few storms to develop across the interior as convective
temperatures are breached. The best chance of seeing a storm or two
would be east of an orleans - willow creek - covelo line. Soundings
show mid-level lapse rates a little above 7 deg. C km with a nearly
super-adiabatic low-level environment. Freezing levels near ten
thousand feet will make some hail a possibility if these storms
develop, with gusty winds also possible given the inverted-v
signature seen in the forecasts. Any storm will be slow moving
though given the weak wind fields throughout the column, with storms
likely being terrain anchored or outflow dominant.

Tuesday and Wednesday has become more interesting, as the GFS drops
the base of the trough across the outer waters now, with a low in
the base nearby. Strong vort maxes ejecting across the region ahead
of the low could aid in convective potential if this forecast
verifies. The ECMWF shows a similar, albeit weaker solution. In any
event, confidence in potential foci for convection has increased,
with increased spatial and temporal periods for such added to the
zones.

As the first trough upper energy dive southeast by Wednesday,
another trough looks to clip us as it passes by to the north, with
additional jet stream energy crossing our neck of the woods. Thus,
convective potential was extended for mainly trinity county through
the end of the week. Temperatures will cool some during this time
frame, as lowering heights aloft and increased cloud cover play a
role in modulating this. Pd

Aviation
The marine layer was fairly deep today and quite intrusive.

Clouds spread well into the inland coastal hills and valleys and
were fairly slow to burn off, especially in mendocino county. At
uki yesterday, clouds had scattered out by 12 noon, but overcast
conditions continued well past noonday with MVFR CIGS around 020
feet. Acv & cec air terminals were also entrenched under a blanket
of stratus once again. The MVFR overcast was enhanced by a couple of
well-defined eddys off the coast. A glimmer of sunshine appeared
around humboldt bay around midday as breezy conditions developed.

Guidance and persistence suggest that the marine layer will remain
definite, so a repeat of today's conditions expected through
Saturday morning. Taa

Marine
Broad weak low pressure will remain over the waters through
Saturday providing light winds and small short period seas. A
ridge offshore will build toward the coast on Sunday bringing a
return of light n-nw winds that will last through mid week.

Eka watches warnings advisories
Ca... None.

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 5 mi76 min Calm G 1 51°F 51°F1018.6 hPa
46244 - Humboldt Bay, North Spit, CA 13 mi31 min 52°F6 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 21 mi62 min ESE 1.9 G 1.9 51°F 51°F5 ft1017.8 hPa (+0.0)49°F
46213 - Cape Mendocino, CA (094) 47 mi30 min 49°F6 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 mi59 minN 010.00 miOvercast52°F51°F97%1018.7 hPa
Fortuna Rohnerville Airport, CA17 mi57 minNNW 35.00 miOvercast50°F50°F100%1018.3 hPa

Wind History from ACV (wind in knots)
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Last 24hrSE4S5SE5SE7SE6SE7S7SW6SW10SW9
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1 day agoE4E3E3CalmCalmCalmSW3W4NW7NW6NW11NW11NW11NW14
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2 days agoSE3NW3CalmSW3SE4S6SW5W3NW5NW5W6W6NW10NW14
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Tide / Current Tables for Eureka Slough Bridge, Humboldt Bay, California
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Eureka Slough Bridge
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Sat -- 01:26 AM PDT     8.62 feet High Tide
Sat -- 05:49 AM PDT     Sunrise
Sat -- 07:55 AM PDT     Moonrise
Sat -- 08:06 AM PDT     -2.18 feet Low Tide
Sat -- 03:05 PM PDT     6.41 feet High Tide
Sat -- 07:58 PM PDT     2.17 feet Low Tide
Sat -- 08:38 PM PDT     Sunset
Sat -- 10:50 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.88.58.57.45.42.90.4-1.4-2.2-1.8-0.51.33.14.85.96.4653.72.62.22.63.75.2

Tide / Current Tables for Humboldt Bay Entrance, California
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Humboldt Bay Entrance
Click for Map
Sat -- 12:48 AM PDT     7.64 feet High Tide
Sat -- 05:50 AM PDT     Sunrise
Sat -- 07:56 AM PDT     Moonrise
Sat -- 08:07 AM PDT     -1.87 feet Low Tide
Sat -- 02:35 PM PDT     5.49 feet High Tide
Sat -- 07:54 PM PDT     2.55 feet Low Tide
Sat -- 08:38 PM PDT     Sunset
Sat -- 10:51 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.47.67.15.841.90-1.3-1.9-1.5-0.31.43.24.65.45.454.23.42.82.6345.3

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Eureka, CA (5,6,7,8)
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Ground Weather Radar Station Eureka, CA
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weather_mapweather_map weather_map

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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.