Saturday, June24, 2017 L-36.com


Marine Weather and Tides
Mendocino, CA

Version 3.4
What's New / NOTES
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 5:46AMSunset 8:44PM Friday June 23, 2017 10:28 PM PDT (05:28 UTC) Moonrise 4:38AMMoonset 7:26PM Illumination 0% Phase: New Moon; Moon at 0 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- 829 Pm Pdt Fri Jun 23 2017
Tonight..W winds up to 5 kt. Waves nw 5 ft at 16 seconds. Patchy drizzle.
Sat..W winds up to 5 kt. Waves nw 4 ft at 11 seconds. Patchy drizzle.
Sat night..NW winds 5 kt. Waves nw 4 ft at 11 seconds. Patchy drizzle.
Sun..W winds 5 kt. Waves sw 3 ft at 11 seconds.
Sun night..NW winds 5 kt. Waves W 4 ft at 7 seconds...and sw 3 ft at 15 seconds.
Mon..NW winds 5 to 10 kt. Waves W 4 ft at 7 seconds...and sw 3 ft at 14 seconds.
Tue..NW winds 10 to 20 kt. Waves nw 7 ft at 7 seconds...and sw 3 ft at 14 seconds.
Wed..NW winds 10 to 20 kt. Waves N 6 ft at 7 seconds.
PZZ400 829 Pm Pdt Fri Jun 23 2017
Synopsis for northern california waters..Light winds and low seas will persist through the weekend. High pressure will bring fresh north winds once again next week allowing for steep waves to build as well.

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 232315
afdeka
area forecast discussion
national weather service eureka ca
415 pm pdt Fri jun 23 2017

Synopsis Hot conditions will continue through Saturday, with a
gradual cooling to near normal temperatures beginning Sunday.

Isolated thunderstorms will be possible Sunday and Monday across
the interior.

Discussion The heat continues throughout northwest california
as a persistent ridge of high pressure maintains it's grip on the
west coast. Temperatures across the interior valleys have
generally reached near or slightly above 100 degrees across a
broad area... And while final highs may end up being 2 to 5 degrees
cooler than yesterday, it may not be noticeable to most. This is
expected to continue tomorrow, with very similar readings
throughout the interior. No changes were made to the ongoing heat
advisory, and it will continue into tomorrow. Trinity county may
see this advisory extended into Sunday, as these hot temperatures
may linger a bit longer here. Meanwhile along the coast, a
weakening offshore pressure gradient has resulted in a southerly
flow reversal along the coast, allowing a shallow stratus deck
to move northward through the day. While some very low elevation
areas have seen periods of stratus on land, the bulk of this cloud
cover has remained offshore. Overnight tonight this stratus will
likely surge inland, although the shallow depth of the marine
layer will limit its inland extent. This stratus will continue to
linger along the coast through at least Monday morning, inundating
low elevation areas in the evening and overnight and slowly
dissipating on land during the afternoons.

The next item of interest will be the potential for thunderstorms
over the weekend, as an upper level low pressure system is set to
develop off the coast and move onshore. As this low develops
Saturday and into Sunday, southerly flow will begin to advect
midlevel moisture into the region. The best chance for
thunderstorms will occur Sunday afternoon and evening when
instability and upper forcing is maximized, and storms will likely
be widely scattered and closely tied to the higher terrain in
siskiyou, northern trinity, and northeastern mendocino counties.

The primary concerns with this activity will be lightning and the
potential for fire starts, although fuels in the higher elevations
remain relatively wet for this time of year. This is not the case
in the lower elevations, and the potential for fire starts does
exist. While Sunday will present the best chances for storms, a
stray storm or two will be possible late Saturday night or early
Sunday morning as modest midlevel instability advects into the
region. While likely very isolated in nature, should any nocturnal
storms develop during this period they would likely feature
little rainfall, and any lightning strikes would be mostly dry.

Isolated storms will again be possible Monday afternoon, but will
likely be focused from the trinity horn northward.

A notable cooling trend can be expected Monday and beyond as the
upper level ridge weakens, with temperatures generally near
normal. Chances for thunderstorms will also decrease Monday and
beyond. Brc

Aviation Along the north coast, skies remained clear (skc)
overnight even as a stratus surged rounded CAPE mendocino... And
then advected more quickly than expected north to acv. By 9:00 am,
the marine clouds had pushed across humboldt bay and up to
trinidad. However, mixing caused the stratus to pull back to the
coast and out of much of the bay. Acv airport and the nearby
immediate coast, including the coves of westhaven trinidad, were
nevertheless breached by the stratus advection. With very little
mixing early on at that coast location, ifr lifr CIGS became a
potential flight threat at acv. By 1 pm, the stratus surged had
reached the oregon border but mostly stayed well offshore. Expect
cig and vis to seriously deteriorate through the evening as the
marine influence shifts onshore.VFR skies will keep fair and hot
conditions over the inland areas. Ta

Marine Light winds and low seas this weekend. A trough of low
pressure is set up off the coast of NW california. This allows the
pressure gradient to relaxes. Do expect light winds through this
weekend. With light winds, seas will be lowering to 5 feet or less
for this weekend. However, we are still dealing with some steep
seas along the coastal waters at least through this evening.

We will return to a strong northerly wind regime starting next
Tuesday as the thermal trough moves back inland and the east
pacific high re-establishes itself. With the tight northerly
pressure gradient, the strong northerly wind regime will persist
through most of next week.

Forecast is still on track. Little changes were made to the
previous forecast package. Extend the small craft advisory through
this evening as the steep seas is taking a little bit longer to
subside. GFS is used to update the forecast package.

Eka watches warnings advisories
Ca... Heat advisory until 8 pm pdt Saturday for caz102-105>108-110-111-
113.

Northwest california coastal waters... Small craft advisory until 9 pm pdt this evening for pzz450-470-
475.

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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 10 mi28 min S 3.9 G 5.8 55°F 1014.4 hPa (+0.5)55°F
ANVC1 - 9416841 - Arena Cove, CA 27 mi40 min SSW 2.9 G 4.1 55°F 53°F1015.1 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA34 mi32 minN 010.00 miFair79°F57°F49%1011.4 hPa

Wind History from UKI (wind in knots)
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Last 24hrSE5S63S5S4CalmS3Calm5SE44SE54E4E5E4E546N9N9W5CalmCalm
1 day agoNW3CalmCalmCalmN3CalmCalmCalmCalmCalm3CalmE4E4SE44E4W9W11W7E8N4S3S6
2 days agoN3NW3NW4NW3CalmCalmCalmCalmCalmCalmCalm3CalmSE4Calm--W9W8NW7SE4N6N6CalmCalm

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
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Sat -- 05:49 AM PDT     Sunrise
Sat -- 06:07 AM PDT     -1.81 feet Low Tide
Sat -- 06:38 AM PDT     Moonrise
Sat -- 12:53 PM PDT     4.65 feet High Tide
Sat -- 05:40 PM PDT     1.98 feet Low Tide
Sat -- 08:45 PM PDT     Sunset
Sat -- 09:26 PM PDT     Moonset
Sat -- 11:50 PM PDT     6.87 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.65.43.71.80-1.3-1.8-1.5-0.60.82.33.64.44.64.33.52.72.122.53.44.65.86.6

Tide / Current Tables for Point Cabrillo, California Current
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Point Cabrillo
Click for Map
Sat -- 03:07 AM PDT     -1.84 knots Max Ebb
Sat -- 05:49 AM PDT     Sunrise
Sat -- 06:38 AM PDT     Moonrise
Sat -- 07:00 AM PDT     0.00 knots Slack
Sat -- 10:04 AM PDT     1.46 knots Max Flood
Sat -- 01:28 PM PDT     -0.00 knots Slack
Sat -- 03:45 PM PDT     -0.92 knots Max Ebb
Sat -- 06:53 PM PDT     0.00 knots Slack
Sat -- 08:46 PM PDT     Sunset
Sat -- 09:27 PM PDT     Moonset
Sat -- 09:46 PM PDT     1.06 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.2-0.9-1.6-1.8-1.7-1.3-0.7-00.71.31.51.30.90.3-0.4-0.8-0.9-0.7-0.40.10.6110.8

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 (1,6,7,8)
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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.