Thursday, August24, 2017 L-36.com


Marine Weather and Tides
Cleone, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 6:34AMSunset 7:55PM Thursday August 24, 2017 3:39 AM PDT (10:39 UTC) Moonrise 8:40AMMoonset 8:55PM Illumination 5% 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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PZZ455 Cape Mendocino To Pt Arena Out 10 Nm- 209 Am Pdt Thu Aug 24 2017
.small craft advisory in effect through Friday evening...
Today..NW winds 15 to 25 kt with gusts to around 35 kt. Waves nw 7 ft at 7 seconds...and nw 3 ft at 11 seconds. Patchy fog.
Tonight..NW winds 15 to 25 kt with gusts to around 35 kt. Waves nw 8 ft at 8 seconds...and nw 4 ft at 12 seconds. Patchy fog.
Fri..NW winds 10 to 20 kt with gusts to around 30 kt. Waves N 7 ft at 7 seconds...and nw 3 ft at 11 seconds. Patchy fog.
Fri night..NW winds 5 to 15 kt. Waves N 5 ft at 7 seconds.
Sat..NW winds 5 kt. Waves nw 5 ft at 9 seconds.
Sun..NW winds 5 to 10 kt. Waves nw 4 ft at 8 seconds...and nw 3 ft at 12 seconds.
Mon..NW winds 5 to 10 kt. Waves N 3 ft at 4 seconds...and nw 4 ft at 12 seconds.
PZZ400 209 Am Pdt Thu Aug 24 2017
Synopsis for northern california waters..Marine conditions will deteriorate through Friday as building high pressure brings increasing north winds. Strong northerlies and steep seas will persist through the work week with gale force wind gusts across the outer waters. The strongest winds will be primarily across the southern outer waters. Winds and seas are forecast to settle late this weekend into early next week.

7 Day Forecast for Marine Location Near Cleone, CA
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location: 39.63, -123.78     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 232227
afdeka
area forecast discussion
national weather service eureka ca
327 pm pdt Wed aug 23 2017

Synopsis An upper trough will produce interior cooling on
Thursday. Warmer weather is expected for the weekend as high
pressure builds over the area. Coastal locations will continue to
see the usual dose of low clouds and fog through the week before
the marine layer decreases this weekend.

Discussion An upper trough to our NW will slowly sag southeast
toward the northern california coast tonight through Thursday.

Drier southwesterly flow aloft in advance of this trough has been
developing across the region today. The thunderstorm threat has
shifted well to our NE with only cloud buildups over the trinity
mountains expected through early this evening.

The upper level trough will deepen the marine layer tonight
and some light coastal drizzle is expected. Shallow cooling
from a weak surface front will result in lower high temperatures
across the interior on Thursday. Increasing northerly winds
offshore behind the front should result in better chances for
clearing along the mendo coast as downslope winds develop in the
lee of the king range. For the north coast, full clearing seems
less probable.

The cool down for the interior will be shortlived. High pressure
aloft and stronger large scale sinking will build back over the
area on Friday. Temperatures will ramp up even more for the
weekend as upper level ridging and stronger adiabatic compression
develops. Interior valleys will once again be flirting with 100f
degree heat. Coastal stratus is expected to compress and become
shallower this weekend. This should result in faster clearing.

The offshore flow is not forecast to become very robust, so only
del norte county may be spared from the stratus this weekend.

However, smoke from the wild fires in western siskiyou county may
result in more smoke filled skies for del norte county. Also, the
latest high resolution models indicate a flow reversal taking
shape south of the CAPE this weekend. This will advect stratus
northward and may keep low clouds and fog locked onto the
mendocino coast through the weekend. Confidence in sunshine for
coastal areas this weekend is declining.

Going into early to mid next week, the ridge aloft will hold
firm then start to shift eastward mid to late next week. This may
be enough increase the depth of the marine layer and allow the
stratus to be a bit more persistent. Inland temperatures will
remain above normal while coastal areas remain near normal.

Aviation The marine layer continued today with ifr-lifr
cigs vis impacting local airports airfields... Especially acv &
cec. The layer remained fairly deep through morning. A received
pirep just before noonday reported cig tops 2200 feet down to 200
feet as a airplane descended into acv. Although the stratus
remained quite entrenched into afternoon, vis satellite indicated
some thin spots vicinity of humboldt bay and a little bit of cloud
erosion just east of acv. "any" mixing out of clouds will once
again be very brief... Allowing the stratus to intensify and again
overwhelm coastal sites by late afternoon early evening. With no
dynamics to change conditions... Stratus should persist. Inland
area airfields will remainVFR through the period.

Marine Winds increased steadily today. The ascat pass showed
15 kt across the northern outer waters and 20 kt to the south.

North winds will continue to increase through Thursday bringing
more substantial gusts across the outer waters Thursday afternoon
through Friday. A gale warning was hoisted for the southern outer
waters with 35 to 40 kt gusts expected Thursday afternoon.

Additional gale force gusts will pepper the northern waters but
are not expected to be enough to warrant a warning. Stronger gusts
will be possible nearshore primarily around point saint george
and CAPE mendocino. Strong north winds will cause steep waves to
hike up Thursday and Friday. A mid period northwesterly wave
system will also propagate into the waters the next few days.

Conditions will begin to settle Saturday with winds and seas
falling below warning and advisory levels late in the weekend into
next week. The existing small craft advisories may need to be
extended into Saturday if winds or seas are slow to settle. Kml

Fire weather Primary concern going into this weekend will be
gusty northeasterly and easterly winds and poorer rh recoveries
for the mid and upper elevations of mainly zones 203 and 204. A
thermal trough will develop along the coast this weekend as the
air aloft warms in response to stronger adiabatic compression.

Expect another round of triple digit heat and very low daytime
rh's across the interior valleys. The warm air aloft will result
in stronger and lower nocturnal inversions. This coupled with
light NE drainage winds will allow smoke from the fires in
western siskiyou county to snake downstream into the
klamath trinity river valleys. The trapped smoke may result in
degraded air quality this weekend. Current indications are for
light to moderate mixing with decent dispersion in the afternoon
hours as the inversion breaks.

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters...

small craft advisory 5am Thu to 10pm Fri pzz450.

Small craft advisory until 4am Sat pzz470.

Small craft advisory 9pm this evening to 10pm Fri pzz455.

Small craft advisory til 3pm Thu pzz475.

Gale warning 3pm Thu to 3am Fri pzz475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46014 - PT ARENA - 19NM North of Point Arena, CA 29 mi49 min NNW 16 G 19 6 ft1013.7 hPa
ANVC1 - 9416841 - Arena Cove, CA 50 mi51 min WNW 1.9 G 5.1 54°F 54°F1013.9 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA46 mi1.7 hrsN 04.00 miFair with Haze60°F51°F72%1011.6 hPa

Wind History from UKI (wind in knots)
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Last 24hrSE3CalmCalmCalmCalmCalmCalmSE33SE4N7W9
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1 day agoS6CalmCalmCalmS3Calm4CalmE44Calm3W7W9
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Tide / Current Tables for Westport, California
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Westport
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Thu -- 01:15 AM PDT     5.83 feet High Tide
Thu -- 06:36 AM PDT     Sunrise
Thu -- 07:31 AM PDT     0.19 feet Low Tide
Thu -- 09:40 AM PDT     Moonrise
Thu -- 02:07 PM PDT     5.44 feet High Tide
Thu -- 07:52 PM PDT     1.29 feet Low Tide
Thu -- 07:57 PM PDT     Sunset
Thu -- 09:55 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.45.85.64.83.62.210.30.30.81.83.14.25.15.45.24.43.32.31.51.31.62.43.3

Tide / Current Tables for Point Cabrillo, California Current
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Point Cabrillo
Click for Map
Thu -- 01:57 AM PDT     -0.00 knots Slack
Thu -- 04:51 AM PDT     -1.34 knots Max Ebb
Thu -- 06:36 AM PDT     Sunrise
Thu -- 08:34 AM PDT     0.00 knots Slack
Thu -- 09:40 AM PDT     Moonrise
Thu -- 11:29 AM PDT     1.14 knots Max Flood
Thu -- 02:38 PM PDT     -0.00 knots Slack
Thu -- 05:18 PM PDT     -1.13 knots Max Ebb
Thu -- 07:57 PM PDT     Sunset
Thu -- 08:55 PM PDT     0.00 knots Slack
Thu -- 09:55 PM PDT     Moonset
Thu -- 11:44 PM PDT     0.99 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.6-0-0.7-1.2-1.3-1.2-0.8-0.30.30.81.11.10.90.4-0.2-0.8-1.1-1.1-0.8-0.400.60.9

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 (6,6,7,8)
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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.