Wednesday, September19, 2018 L-36.com


Marine Weather and Tides
Mendocino, CA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:57AMSunset 7:14PM Wednesday September 19, 2018 1:28 PM PDT (20:28 UTC) Moonrise 3:37PMMoonset 12:47AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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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PZZ455 Cape Mendocino To Pt Arena Out 10 Nm- 833 Am Pdt Wed Sep 19 2018
.small craft advisory in effect through Thursday evening...
Today..NW winds 15 to 25 kt with gusts to around 35 kt. Waves nw 8 ft at 9 seconds...and nw 2 ft at 13 seconds.
Tonight..N winds 15 to 25 kt with gusts to around 35 kt. Waves nw 8 ft at 9 seconds.
Thu..N winds 15 to 25 kt. Waves nw 7 ft at 8 seconds.
Thu night..N winds 10 to 20 kt. Waves nw 7 ft at 8 seconds.
Fri..NW winds 10 to 20 kt. Waves nw 6 ft at 7 seconds...and nw 2 ft at 13 seconds.
Sat..NW winds 10 to 15 kt. Waves nw 5 ft at 6 seconds...and nw 3 ft at 13 seconds.
Sun..NW winds 10 to 20 kt. Waves N 5 ft at 5 seconds.
PZZ400 833 Am Pdt Wed Sep 19 2018
Synopsis for northern california waters..Brisk northerly winds will persist across the coastal waters through the work week. Winds and steep seas will peak today and remain at advisory criteria into Thursday before gradually diminishing by Friday.


7 Day Forecast for Marine Location Near Mendocino, CA
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location: 39.3, -123.8     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 191123
afdeka
area forecast discussion
national weather service eureka ca
423 am pdt Wed sep 19 2018

Synopsis High pressure offshore will maintain dry weather
conditions with seasonable temperatures through the week.

Discussion Stratus has been dissipating through the night in
the wake of a dry short-wave trough. Some low cloud cover will
probably linger trough mid-morning, especially in the coastal
river valleys. Otherwise, expect sunshine for coastal areas
today.

Upper ridging should result in warming across the interior today.

Highs generally in the 80s are expected for the interior valleys.

Northerly to northwesterly breezes will keep coastal areas on the
cool side, however. The beaches may not warm at all due to chilly
onshore breezes by this afternoon.

Upper ridging and offshore flow will continue tonight into Thursday.

The offshore flow should limit the coverage of stratus, though patches
may still form around humboldt bay and in the eel delta. After a
chilly morning, interior temperatures are expected to warm above
normal on Thursday. Temperatures should peak in the lower to mid
90s in the valleys of mendocino and trinity counties.

The ridge will start to buckle on Friday as a new trough
approaches the pacific northwest. Temperatures will probably
remain above normal on Friday. A dry front will move across the
area Friday night resulting in a return of coastal low clouds. No
rain is expected for NW california from this front, though patchy
coastal drizzle will be possible by early Saturday morning.

A dry weather pattern is expected to persist through the weekend
and hold into the early portion of next week. A push of marine air
on Saturday behind a dry front should result in cooling for the
coastal river valleys of humboldt and del norte counties. Temperatures
should start to warm up again by early next week as an upper ridge
rebuilds over the area and an offshore flow pattern emerges.

Aviation Overnight satellite imagery shows stratus in the
vicinity of kacv and none around kcec. The stratus around kacv is
has shown a clearing trend while stratus looks to be slowly building
toward kcec. Given this trend, expect little to no stratus at kacv
and periods of stratus at kcec this morning, with mainly sunny
conditions this afternoon at both coastal terminals. Hi-res guidance
does bring stratus back in to kacv this morning, but confidence is
low given the recent clearing. Elsewhere,VFR conditions will
continue through the TAF period.

Marine Strong northerly winds will continue through today in
response to a pressure gradient created by a thermal trough over
interior california. Seas will continue to peak through this
morning, with seas expected to be between 8 to 11 feet at 7 to 9
seconds. Gusts may near gale force in strength across the outer
waters, along with near and downwind of CAPE mendocino; however,
these conditions are expected to be localized. Overnight buoy
observations continue to support the current small craft
advisories over the coastal waters. Winds and seas will gradually
come down the later half of the week, with conditions expected to
drop below advisory level Thursday night into Friday. Otherwise, a
southerly swell with a period around 15 seconds will continue
across the coastal waters through this morning and will return
Friday afternoon.

Fire weather Issued at 250 pm pdt Tue sep 18 2018. While there
will be some potential for localized lower humidity recoveries
and breezier northeast winds over the higher ridges of del norte
county during the next couple of mornings nights, the greater
concern has shifted to areas of far eastern mendocino and lake
counties Wednesday night and Thursday. NWS sacramento and
monterrey have fire weather watches posted for their adjacent
zones for low humidity and gusty winds. Model guidance indicates
that the higher terrain over eastern mendocino and lake county in
particular will see afternoon rh in the teens, and recoveries only
into the 30s Thursday and Friday mornings. However, winds outside
of some localized exposed ridgetops appear that they will be
light, with any stronger winds staying in the zones adjacent to
ours where the fire weather watch is posted. Somewhat cooler
weather with improved rh is projected for the weekend, but then
next week looks like it will bring warmer temperatures and lower
humidity. Aad

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters...

small craft advisory until 9 am pdt Thursday for pzz450.

Small craft advisory until 9 pm pdt Thursday for pzz455-470-475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46263 8 mi119 min 53°F7 ft
46014 - PT ARENA - 19NM North of Point Arena, CA 10 mi39 min NNW 18 G 23 55°F 54°F8 ft1014.7 hPa54°F
ANVC1 - 9416841 - Arena Cove, CA 27 mi47 min NW 7 G 16 57°F 52°F1015.5 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA34 mi93 minN 010.00 miFair75°F42°F31%1012.7 hPa

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Last 24hrCalmNW12
G20
N10NW114N7N6CalmCalmCalmSE3S4CalmCalmNW5N3CalmCalmCalmNW3N3N4CalmNE4
1 day ago6NW11NW8
G15
N8N6N4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE3CalmCalmCalmCalmCalm
2 days ago56NW13NW7NW6N3N5W3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNW4

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Point Cabrillo, California Current
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


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 (16,3,4,5)
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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.