Sunday, July23, 2017 L-36.com


Marine Weather and Tides
Ukiah, 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 6:04AMSunset 8:34PM Saturday July 22, 2017 11:55 PM PDT (06:55 UTC) Moonrise 4:20AMMoonset 7:03PM Illumination 0% Phase: New Moon; Moon at 29 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 859 Pm Pdt Sat Jul 22 2017
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft at 8 seconds. Patchy fog after midnight.
Sun..W winds 5 to 15 kt...becoming S in the afternoon. Wind waves 3 to 4 ft. NW swell 5 to 7 ft at 8 seconds. Patchy fog in the morning.
Sun night..SE winds 10 kt. Wind waves 2 ft or less. NW swell 5 to 7 ft at 9 seconds. Patchy fog after midnight. Patchy drizzle after midnight.
Mon..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft at 9 seconds. Patchy fog in the morning. Patchy drizzle in the morning.
Mon night..SE winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft at 10 seconds. Patchy fog after midnight. Patchy drizzle after midnight.
Tue..NW winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft. Patchy fog.
Wed..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft. Patchy fog.
Thu..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 6 ft. Patchy fog.
PZZ500 859 Pm Pdt Sat Jul 22 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the eastern pacific will shift to the northwest as a thermal trough extends towards the central coast of california. Winds will begin to decrease for most of the coastal waters. The northern outer waters, however, will remain gusty through the weekend.

7 Day Forecast for Marine Location Near Ukiah, CA
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location: 39.15, -123.21     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 222245
afdeka
area forecast discussion
national weather service eureka ca
345 pm pdt Sat jul 22 2017

Synopsis
Isolated thunderstorms are possible for portions of trinity, del
norte, and humboldt counties tomorrow through early next week.

Otherwise, hot and dry conditions will continue to persist across
the interior for a few more days before more seasonal temperatures
return early next week. Coastal low clouds and patchy fog will
also be possible each night however sunshine should return each
afternoon.

Discussion
The marine layer has been shrinking throughout the day and most of
the coastal stratus has disappeared this afternoon. Tonight,
offshore flow in combination with a compressed marine layer should
keep the stratus confined to areas just along the coast. This
coastal stratus should dissipate again tomorrow by early
afternoon.

Inland hot temperatures will persist for at least one more day with
more seasonal temperatures (granted still warm) returning early next
week. The main forecast issue for this cycle is the chance for
thunderstorms across the interior tomorrow through mid-week. Water
vapor analysis currently shows a mid-level low located across the
pacific slowly moving towards the ca coast which will be the main
player for the week. While the GFS has been consistent for the past
few runs of developing isolated thunderstorms across the interior
mountains, other models do not present the same scenario. Therefore
quite a few questions still remain as to what will actually happen.

Most models are consistent with slowly bringing the mid-level low
just south of CAPE mendocino and then leaving it there to spin lobes
of energy across our area. Models have been slowing the progression
of this low onto land with subsequent runs which is why isolated
thunderstorms now appear possible through Wednesday. Timing of this
passage will dictate when the thunderstorm chances across the
interior will come to an end. Precipitable water values are
expected to increase to around an inch by tomorrow afternoon by
several models however the exact source of this moisture is still
a bit questionable. Goes-16 derived total precipitable water still
shows around 0.4 inches across our region with no indication of
higher pwats streaming in however the stratus is preventing
retrieval of values across the pacific but bears watching tonight
into tomorrow. Other convective parameters do appear favorable
for thunderstorms with capes near 1000 j kg, LI near
-3, and lapse rates near 8.0 c km. Modest 0-6km shear values are
also present with an upper level jet streak off to our south and
west which would help to organize any thunderstorms that do form.

As this system approaches the coast it will be better analyzed
which should help models come to a more uniform solution.

The second half of the week the mid level low should push inland
leaving us in zonal southwest flow. This will lead to the
termination of thunderstorm chances and a return to more seasonal
temperatures. Wci

Aviation
A bank of low clouds developed and lowered late last
night, with a period of low visibilities at kcec this morning. This
cloudiness dispersed early this afternoon, with just a few clouds
lingering in the eel river valley. Looking at the model low-level
moisture flux convergence product, it appears likely that clouds
will reform near the coast N of CAPE mendocino later this evening,
and have generally indicated a similar forecast at redwood coast taf
sites to what happened this morning. High resolution guidance does
indicate some low-level offshore flow tonight in del norte county,
so uncertainty is moderate to high at kcec. In addition, smoke from
a fire in E curry county in SW oregon may periodically produce a
smoke layer near kcec. Kuki is expected to remainVFR. Sec

Marine
A thermal trough over the interior and E pacific high
pressure will maintain a tight pressure gradient over the coastal
waters into the middle of the coming week. As a result, winds will
continue to gradually increase tonight with sustained gales possible
over the N outer waters. Have hoisted a hazardous seas watch for the
s outer waters for Sunday afternoon through Monday afternoon. Gale
force gusts will affect the NW portion of the S outer zone, but the
areal extent isn't forecast to necessitate a gale watch. However,
building seas will continue to be directed into the zone from the
stronger winds to the n. Have also extended the small craft advisory
for the N inner and S outer waters into midday Tuesday. Sec

Fire weather
Gusty northeast and easterly winds will continue over
the exposed ridges of humboldt and del norte counties tonight with
poorer rh recoveries. The offshore flow pattern coupled with
strong warming aloft will continue to bring hot daytime
temperatures as well as lower daytime humidities on Sunday. In
addition, an upper-level low will bring the possibility for
thunderstorms Sunday through early next week especially across
the interior mountains.

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until noon pdt Tuesday for pzz450-475.

Gale warning until 5 pm pdt Monday for pzz470.

Small craft advisory until 11 am pdt Sunday for pzz455.

Hazardous seas watch from Sunday afternoon through Monday
afternoon for pzz475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 31 mi43 min WNW 1.9 G 6 55°F 48°F1012 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 41 mi35 min NNW 16 G 21 1012 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA1 mi2 hrsN 010.00 miFair79°F52°F39%1009.5 hPa

Wind History from UKI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmSE3CalmCalmE3E3E4CalmSE3E4E5NW8W9W5CalmCalmCalmCalmCalm
1 day agoNW3CalmNW4NW3N3CalmW3N3N4CalmCalmCalm--N10N10N8
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Tide / Current Tables for Albion, California
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Albion
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Sun -- 02:47 AM PDT     New Moon
Sun -- 05:46 AM PDT     -1.34 feet Low Tide
Sun -- 06:07 AM PDT     Sunrise
Sun -- 06:29 AM PDT     Moonrise
Sun -- 12:43 PM PDT     5.23 feet High Tide
Sun -- 05:39 PM PDT     2.25 feet Low Tide
Sun -- 08:34 PM PDT     Sunset
Sun -- 08:56 PM PDT     Moonset
Sun -- 11:39 PM PDT     6.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.45.23.41.4-0.2-1.1-1.3-0.80.21.52.94.255.24.73.932.42.32.83.74.95.96.7

Tide / Current Tables for Point Arena, California
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Point Arena
Click for Map
Sun -- 02:47 AM PDT     New Moon
Sun -- 05:51 AM PDT     -1.42 feet Low Tide
Sun -- 06:08 AM PDT     Sunrise
Sun -- 06:29 AM PDT     Moonrise
Sun -- 12:29 PM PDT     4.90 feet High Tide
Sun -- 05:30 PM PDT     1.98 feet Low Tide
Sun -- 08:34 PM PDT     Sunset
Sun -- 08:55 PM PDT     Moonset
Sun -- 11:35 PM PDT     6.88 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.45.13.41.6-0.1-1.1-1.4-0.90.21.63.14.24.84.84.33.42.62.12.12.63.74.966.8

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 (2,6,7,8)
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Ground Weather Radar Station Beal AFB, 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.