Wednesday, December12, 2018 L-36.com


Marine Weather and Tides
Caspar, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:22AMSunset 4:52PM Wednesday December 12, 2018 9:03 AM PST (17:03 UTC) Moonrise 11:25AMMoonset 9:55PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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- 842 Am Pst Wed Dec 12 2018
.small craft advisory in effect from noon pst today through Friday morning...
Today..N winds 10 to 20 kt, gusts up to 25 kt. Waves nw 5 ft at 6 seconds...and nw 13 ft at 14 seconds.
Tonight..N winds 5 to 10 kt. Waves nw 5 ft at 6 seconds...and nw 14 ft at 16 seconds.
Thu..SE winds 5 to 10 kt. Waves nw 13 ft at 16 seconds.
Thu night..S winds 10 to 20 kt. Waves sw 5 ft at 7 seconds... And nw 11 ft at 16 seconds.
Fri..W winds 5 to 10 kt. Waves sw 5 ft at 7 seconds...and nw 15 ft at 16 seconds.
Sat..SE winds 15 to 25 kt. Waves S 6 ft at 7 seconds...and nw 9 ft at 14 seconds.
Sun..S winds 10 to 20 kt. Waves S 8 ft at 10 seconds...and W 12 ft at 20 seconds.
PZZ400 842 Am Pst Wed Dec 12 2018
Synopsis for northern california waters..Another series of significant west to northwesterly swells will enter the waters periodically from tonight through the weekend. Winds and short period seas will increase late in the week ahead of an approaching system.


7 Day Forecast for Marine Location Near Caspar, CA
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location: 39.35, -123.83     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 121314
afdeka
area forecast discussion
national weather service eureka ca
514 am pst Wed dec 12 2018

Synopsis High pressure building across northern california will
bring dry weather and some sunshine for Wednesday and Thursday.

A cold front will send us a quick shot of rain, gusty winds, and
modest mountain snows on Friday. Another cold front carrying a bit
more moisture will pass through around Sunday.

Discussion In the wake of a passing cold front and upper-level
trough, fairly strong high pressure will build across northern
california both at the surface and aloft today. This will allow
for a nice period of dry weather along with a fair amount of
sunshine for most locations. That being said, although all shower
activity has cleared our region, areas of clouds linger
particularly across some of the inland mountainous terrain. With
increasingly dry and stable air, expect these clouds to be short-
lived. Clouds and breezy northwest winds overnight managed to keep
temperatures mild across northwest california overnight, and
limited fog development for the most part. As surface high
pressure continues to build into interior california and oregon,
winds will be light outside of immediate coastal locations exposed
to the north, along with a few ridgetop spots. After a mild
start, high temperatures will not recover too much, and will be
near seasonal normals for mid-december. The exception will be
across mendocino county where highs will end up in the low 60s in
the warmer spots, which is several degrees above average.

A passing mid-level disturbance may try to bring in some mid and
high-level clouds across humboldt, del norte, and perhaps trinity
county later this afternoon through this evening, perhaps putting
an end to the sunshine later today. This also may act to keep
temperatures from falling too quickly tonight, though with
clearing skies toward morning along with light winds, certainly
expect a cooler night than last night for most spots. Thinking
most locations along the coastal plain will end up in the upper
30s to around 40, but if skies end up clearer, frost would be a
concern. Valley fog and low clouds will likely develop inland, and
last into Thursday morning.

Aside from the valley fog, Thursday will be a mostly sunny day
with high temps pushing 5 to 10 degrees above seasonal averages. A
fair amount of 60s will be found along the coastal plain and in
the warmer valley locations outside of trinity county. The
tranquil weather will not last, as a fast-moving cold front will
swing through on Friday as strong low pressure tracks
northeastward toward british columbia. Models solutions are still
varied when it comes to the exact timing of the frontal passage,
but right now the smart money is around midday into the afternoon.

The heaviest rain and strongest winds will occur prior to and
with the frontal passage. Rain may only last several hours, with
the duration of heavy rain expected to be fairly short. However, it
is not out of the realm of possibilities that some brief urban or
small stream flooding can occur. Otherwise rainfall will not be
much of an issue, ranging from a half inch to an inch over most of
the area. Most of mendocino county and the valleys of trinity
county will be closer to a third of an inch of rain. Winds could
have a greater impact for certain areas, with most models
indicating a low- level jet carrying 50 kt winds down to 1500 or
2000 ft above msl at the coast. Expect wind advisories will
probably be necessary for the higher terrain of inland del norte
and maybe humboldt, with 40 to 50 mph gusts likely in exposed
spots there. Crescent city is more of a question mark, with maybe
40 mph gusts mid to late morning Friday a reasonable expectation
at this point. Snow levels will be a non- issue for most of the
area passes, as they will be around the 4500-5000 ft range. The
exception would be by scott mountain on highway 3, where several
inches of snow will be possible.

Otherwise, the forecast as a whole for the next 7 days remains
largely unchanged. Saturday is still looking like a drier day,
though with a narrow window between storm systems, we have
continued at least a slight chance of rain given some uncertainty
in timing these fronts. Sunday will bring another fast-moving cold
front, though with a somewhat better connection to deeper pacific
moisture, we might see twice as much rain as the front on Friday
dumps. A period of gusty southerly winds will also come with it,
but not as strong as with Friday's front. Model uncertain expands
heading into next week, with perhaps a break of relatively drier
weather on Monday. An atmospheric river with a better connection
to pacific subtropical moisture is likely to set up, but taking
aim at the pacific northwest, to the north of california.

However, there are still questions as to the southern extent of
this moisture, which will determine weather we have a very wet
week, or a relatively dry one. Either way, it looks relatively
mild, with high snow levels. Aad

Aviation The combination of gusty northwest winds and lingering
low to mid level cloud cover has precluded any significant fog
development this morning, yieldingVFR conditions across the area in
the wake of the front.VFR conditions are expected to persist
through the TAF period as weak high pressure builds into the area.

Pressure rises behind the departing front have initiated a brief
period of gusty northwest winds at uki early this morning after
impacting cec and acv overnight. These winds should diminish fairly
quickly this morning, yielding mainly light winds below 8 kts for
the remainder of the TAF period. Cb

Marine A new mid period northwesterly swell train has been a
little slower than progged to move into the coastal waters overnight
but will nonetheless support small craft advisory level conditions
for much of the remainder of the work week as it continues to
propagate through. This will be coupled with fresh northerly breezes
and elevated short period seas across the southern waters today as
stronger northerly winds linger behind the departing front before
trending down overnight. Winds will then increase out of the south
on Thursday ahead of the next system approaching on Friday, yielding
another increase in short period seas and more treacherous combined
seas across the outer waters. Gusts to 40 knots will be possible by
Thursday night, prompting a gale watch for the northern outer
waters. Winds should quickly diminish and shift to the west on
Friday as the front moves through, but the significant northwest
swell train will continue to impact the waters into the weekend. Cb

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until
9 am pst Friday for pzz450.

Gale watch from Thursday evening through Friday morning for
pzz470.

Small craft advisory until 9 pm pst Thursday for pzz470.

Small craft advisory from noon today to 9 am pst Friday for
pzz455.

Small craft advisory until 9 am pst Friday for 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 11 mi43 min NW 14 G 18 55°F 56°F1026.4 hPa47°F
ANVC1 - 9416841 - Arena Cove, CA 31 mi45 min E 2.9 G 7 49°F 55°F1026.6 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA36 mi67 minN 010.00 miFair39°F36°F89%1025.8 hPa

Wind History from UKI (wind in knots)
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Last 24hrCalmN4N4Calm3CalmN6CalmCalmCalmNW7NE6S4CalmE3CalmNE3--N10NE5CalmCalmNW3Calm
1 day agoNW43E44SE33NW7W5W3SW3CalmW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmCalmCalmCalmSW3CalmCalmNW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN4

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
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Wed -- 03:09 AM PST     4.61 feet High Tide
Wed -- 07:25 AM PST     Sunrise
Wed -- 08:19 AM PST     3.28 feet Low Tide
Wed -- 11:23 AM PST     Moonrise
Wed -- 01:24 PM PST     4.85 feet High Tide
Wed -- 04:52 PM PST     Sunset
Wed -- 08:32 PM PST     0.22 feet Low Tide
Wed -- 09:55 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.93.74.44.64.54.23.83.53.33.33.64.14.54.84.84.43.62.61.50.70.30.30.71.4

Tide / Current Tables for Point Cabrillo, California Current
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Point Cabrillo
Click for Map
Wed -- 12:11 AM PST     0.91 knots Max Flood
Wed -- 03:43 AM PST     -0.00 knots Slack
Wed -- 05:49 AM PST     -0.55 knots Max Ebb
Wed -- 07:25 AM PST     Sunrise
Wed -- 09:23 AM PST     0.00 knots Slack
Wed -- 11:24 AM PST     Moonrise
Wed -- 11:53 AM PST     0.47 knots Max Flood
Wed -- 02:29 PM PST     -0.00 knots Slack
Wed -- 04:52 PM PST     Sunset
Wed -- 05:53 PM PST     -1.09 knots Max Ebb
Wed -- 09:52 PM PST     0.00 knots Slack
Wed -- 09:55 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.90.90.70.3-0.1-0.5-0.5-0.4-0.3-0.10.20.40.50.40.1-0.2-0.6-1-1.1-0.9-0.6-0.30.10.5

Weather Map and Satellite Images
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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 (12,3,4,5)
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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.