Tuesday, January16, 2018 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 7:28AMSunset 5:17PM Tuesday January 16, 2018 11:15 AM PST (19:15 UTC) Moonrise 7:08AMMoonset 5:13PM 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- 900 Am Pst Tue Jan 16 2018
Today..NW winds 10 kt. Wind waves 2 ft or less. W swell 11 to 14 ft at 16 seconds.
Tonight..NW winds 10 kt...becoming northeast after midnight. Wind waves 3 to 4 ft. W swell 11 to 13 ft at 15 seconds.
Wed..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 9 to 12 ft at 14 seconds.
Wed night..S winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 8 to 10 ft at 21 seconds. Chance of rain in the evening, then rain likely after midnight.
Thu..W winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 18 to 21 ft at 21 seconds. Rain likely, then chance of showers.
Fri..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 15 to 18 ft. Chance of showers, then slight chance of showers.
Sat..W winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 12 to 15 ft. Slight chance of rain.
PZZ500 900 Am Pst Tue Jan 16 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate winds will prevail today as high pressure remains off the coast. Winds will switch southerly late tonight and Wednesday as a low pressure system develops off the british columbia coast and pushes the high south. Large swells will impact the beaches through early tonight before decreasing. A larger swell with long period will arrive Thursday.

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 161738 aaa
afdeka
area forecast discussion... Updated
national weather service eureka ca
938 am pst Tue jan 16 2018

Synopsis Mainly dry conditions will occur across northwest
california Tuesday through midday Wednesday. Thereafter, southerly
winds will strengthen ahead of a storm system during Wednesday
afternoon. This will be followed by an extended period of
precipitation Wednesday evening into Saturday. In addition, snow
levels will fall to 2500 feet Thursday night and Friday.

Update A weak warm front has been bringing some light rain or
drizzle to mendocino county this morning. Rainfall amounts will be
light, but periods of light rain may continue through the
afternoon and evening. This light rain or drizzle is expected to
move north this afternoon and evening. Did a quick update to the
forecast to add a chance of rain to these areas. Mkk

Prev discussion issued 433 am pst Tue jan 16 2018
discussion... Rain showers that occurred Monday have cleared the
region as a shortwave impulse exits east away from nwrn ca.

However, an upper-level long wave trough persists over the gulf of
alaska and the nern pacific, with 140+ kt jet stream winds
spreading toward the base of the trough. This will favor height
falls upstream from the trough, and modest ridging downstream over
the pac nw. As a result, mainly dry weather will be favored
Tuesday through midday Wednesday. One exception... Model guidance
shows a subtle upper disturbance moving across the area Tuesday
night, which could yield a brief period of light rain.

Otherwise, an upper low is forecast to develop offshore from bc
during Wednesday. An intense cyclone will develop at the surface
beneath the low, with an associated cold front approaching nwrn ca
Wednesday evening. South-southeasterly winds will accelerate in
advance of the front, with advisory level speeds expected in the
vicinity of crescent city and adjacent ridges. Rain will spread
inland with the front during Wednesday night, possibly becoming
moderate in intensity over the coastal mountains of del norte and
northern humboldt counties.

Behind the front during Thursday, midlevel temperatures will
become progressively cooler during the day, with the coldest air
arriving Thursday night (characterized by 500 mb temperatures at
or below -30c, and 700 mb temperatures at or below -12c). The cold
midlevel airmass will yield steep lapse rates that will favor
mucape values near 200 j kg, which will support a slight chance of
thunderstorms and small hail accumulations on area roadways near
the coast Thursday night and Friday. In addition, snow levels
will fall to around 2500 feet. This may result in advisory level
snow accumulations for highways at pass level.

Showers will persist through at least Friday night as a second
impulse moves across the region. This will be followed by
gradually warming midlevel temperatures during Saturday, which
will result in shower dissipation and rising snow levels. After
Saturday, model guidance shows another upper low digging across
the nern pac. A frontal boundary associated with the low will
subsequently advance across nwrn ca Sunday night, resulting in
another round of rain.

Aviation... Showers were ending early this morning across nw
california. At the same time, clearing skies were taking place.

With abundant ground moisture and clear skies, low clouds and fog
were popping up in the area this morning. Conditions were bouncing
betweenVFR and MVFR for crescent city airport, between
vfr MVFR ifr for arcata airport, and between MVFR ifr lifr for
ukiah airport. Do expect conditions to improve later this morning
as daytime heating should provide enough mixing for the low clouds
to burn off.VFR conditions will then prevail across all
terminals for the rest of today. Do expect lower cloud ceilings
and increasing winds late tonight for arcata and crescent city
airports. For ukiah, do expect potential for low clouds and fog
for late tonight.

Marine... Very active marine weather will be in store for nw
california waters. We will be dealing with significant seas
through this weekend. We will also be dealing with gale force
winds on Wednesday for part of the waters.

For today, expect light south winds across the waters. However,
the lull in the wind speed will be brief. South winds will be on
the increase again starting tonight ahead of the next weather
front. Do expect gale force winds and gusts for the northern
outside waters. Small craft advisory winds are expected for
southern outside and northern inside waters. On Wednesday night,
winds will shift to the southwest and diminish after the frontal
passage. After that, do expect persistent westerly to
southwesterly winds through the weekend.

Seas will be significant through Saturday. For today, combined
seas will be around 12 to 15 feet as we are still impacted by a
middle period decaying swell group. After the frontal passage on
Wednesday, there will be a significant westerly swell moving into
nw california waters late Wednesday night. Do expect combined seas
of 24 to 28 feet, with the worst conditions found near oregon
waters. Combined seas of 20 to 24 feet can be found for the
northern inside waters and southern waters. Seas will start to
subside on Saturday. Due to the significant swell, decide to issue
a hazardous seas warning from early Thursday morning through
Saturday morning.

High surf... With the significant westerly swell, there is a
potential for high surf along west-facing beaches. Models are
hinting at surf heights of around 26 to 27 feet, which is on the
high end of advisory and just below the warning criteria for high
surf. We will continue to monitor the situation. Confidence is
high that the conditions will be hazardous. However, still need to
nail down the details on the exact magnitude of the high surf
conditions.

Eka watches warnings advisories
Ca... Wind advisory from 10 am Wednesday to 1 am pst Thursday for
caz101.

Northwest california coastal waters... Small craft advisory until 4 am pst Thursday for pzz450-475.

Hazardous seas warning from 4 am Thursday to 10 am pst Saturday
for pzz450-455-475.

Small craft advisory until 7 am pst Wednesday for pzz470.

Gale warning from 7 am to 10 pm pst Wednesday for pzz470.

Hazardous seas warning from 10 pm Wednesday to 10 am pst
Saturday for pzz470.

Small craft advisory until 3 pm pst Wednesday for pzz455.

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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 mi46 min NNW 1.9 G 4.1 55°F 56°F1025.2 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 41 mi36 min NNE 1.9 G 5.8 1024.7 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA1 mi80 minN 02.50 miFog/Mist54°F52°F93%1024.1 hPa

Wind History from UKI (wind in knots)
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Last 24hrSE5S9SE8S6SE3SE8S6S4SE7CalmCalmN3E4CalmCalmCalmCalmS3CalmCalmCalmCalmCalmCalm
1 day agoCalmCalmW3CalmCalmW5CalmCalmCalmW3CalmCalmCalmCalmCalmCalmCalmCalmE3CalmCalmCalmCalmCalm
2 days agoN43CalmCalmW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Albion, California
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Albion
Click for Map
Tue -- 04:17 AM PST     2.93 feet Low Tide
Tue -- 07:10 AM PST     Moonrise
Tue -- 07:32 AM PST     Sunrise
Tue -- 10:02 AM PST     6.04 feet High Tide
Tue -- 05:02 PM PST     -0.42 feet Low Tide
Tue -- 05:15 PM PST     Moonset
Tue -- 05:17 PM PST     Sunset
Tue -- 06:18 PM PST     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.64.33.73.22.933.54.35.15.765.84.93.62.10.8-0.1-0.4-0.20.51.52.63.74.4

Tide / Current Tables for Point Arena, California
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Point Arena
Click for Map
Tue -- 04:01 AM PST     3.05 feet Low Tide
Tue -- 07:09 AM PST     Moonrise
Tue -- 07:31 AM PST     Sunrise
Tue -- 09:58 AM PST     6.30 feet High Tide
Tue -- 05:11 PM PST     -0.19 feet Low Tide
Tue -- 05:15 PM PST     Moonset
Tue -- 05:18 PM PST     Sunset
Tue -- 06:18 PM PST     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.64.33.73.233.23.84.65.46.16.365.23.92.51.20.2-0.2-00.71.82.93.94.6

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 (14,3,4,5)
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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.