Saturday, August19, 2017 L-36.com


Marine Weather and Tides
Redwood Valley, 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 6:29AMSunset 8:02PM Saturday August 19, 2017 11:41 AM PDT (18:41 UTC) Moonrise 3:08AMMoonset 5:44PM Illumination 7% Phase: Waning Crescent; Moon at 27 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- 852 Am Pdt Sat Aug 19 2017
.small craft advisory in effect through Sunday evening...
Today..NW winds 15 to 25 kt with gusts to around 35 kt. Waves nw 7 ft at 9 seconds. Patchy smoke.
Tonight..N winds 15 to 25 kt with gusts to around 35 kt. Waves N 8 ft at 10 seconds...and sw 2 ft at 15 seconds. Patchy fog.
Sun..S winds 5 to 15 kt with gusts to around 35 kt. Waves S 2 ft at 3 seconds...and N 6 ft at 11 seconds. Patchy fog.
Sun night..NW winds 5 to 10 kt. Waves N 4 ft at 10 seconds.
Mon..W winds up to 5 kt. Waves N 3 ft at 7 seconds...and nw 3 ft at 11 seconds.
Tue..NW winds 5 to 15 kt. Waves nw 3 ft at 6 seconds...and nw 3 ft at 10 seconds.
Wed..NW winds 10 to 20 kt. Waves nw 6 ft at 7 seconds...and nw 2 ft at 12 seconds.
PZZ400 852 Am Pdt Sat Aug 19 2017
Synopsis for northern california waters..Northerly gales will continue across the outer waters today and Sunday. Gale force gusts will be possible nearshore primarily near point saint george and cape mendocino. Seas will be large and steep through the weekend. Marine conditions are expected to settle by the middle of next week.

7 Day Forecast for Marine Location Near Redwood Valley, CA
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location: 39.28, -123.35     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 191206
afdeka
area forecast discussion
national weather service eureka ca
506 am pdt Sat aug 19 2017

Synopsis
Northeasterly winds will continue to transport smoke from the
wildfires in southern oregon and northern california across our
region. Above average temperatures will persist across the
interior through the middle of next week before a slight cool down
late next week. Thunderstorms will be possible across trinity and
mendocino counties Tuesday afternoon and evening.

Discussion
Today we are undergoing a slight pattern shift as a weak rex
block develops along the u.S. West coast. The sensible weather
will not change much with only a slight cool down in temps. Along
the coast a strong pressure gradient is setting up which will
allow for enhanced northeasterly winds for elevated locations
across del norte and humboldt counties today and tomorrow. These
enhanced winds and poor overnight rh recoveries will lead to
elevated to locally critical fire weather conditions (see fire
weather discussion below). These northeasterly winds will continue
to transport smoke across del norte and humboldt counties through
early next week. Then, winds will weaken which will allow the smoke
to only drift near its source rather than spreading out across
the entire redwood coast however the region should remain
generally smoky assuming the fires continue.

The low pressure of the rex block will setup along the south
central ca coast which will lead to enhanced moisture return and
slightly cooler temperatures aloft across NW ca. These cooler
temperatures aloft will help to deepen the marine layer (already
evident on the profiler) which should lead to more cloudiness
along the coast for the next week. The cut off low to our south
will also help enhance thunderstorm potential perhaps as early as
Monday but definitely Tuesday afternoon across interior mendocino
and trinity counties. Due to relatively weak steering flow in the
upper levels these storms will be primarily tied to the higher
terrain.

Towards midweek models indicate that the cutoff low will become more
progressive and clear our area as an even more substantial trough
approaches the region. This system will help to bring
temperatures back to near normal for this time of year across the
interior however precipitation should be limited due to a lack of
moisture. Wci

Aviation
High pressure and offshore flow is keeping clouds to a
minimum this morning to the north of CAPE mendocino. There is a
layer of smoke bringing MVFR conditions to areas and there are
some patchy ifr clouds. These clouds look to be expanding as of
4:30 am and may spread into kacv. This may take until mid morning
for it to dissipate. Farther south there is a fairly shallow layer
of stratus and fog which is expected to burn off back to the
coast. The MVFR conditions at crescent city will likely persist
for a few more hours this morning, but increased mixing during the
morning may dissipate it. This afternoon as fire activity
increases there may be some mvr layers of smoke again along the
coast. Along the del norte coast north to northwest winds with
gusts to 30 mph are expected in the afternoon and evening. Farther
south and tonight winds will diminish. Increased offshore flow
will likely keep clouds out of del norte county and kcec tonight.

There may be some clouds around humboldt bay and the mendocino
coast will likely see widespread stratus again. Mkk

Marine
High pressure off to the northwest and developing low
pressure to the south is bringing gale force winds to the waters
this morning. The orientation of the pressure gradient is to keep
the stronger winds off the coast with the exception of near cape
mendocino and point st george. These areas will likely see local
gusts to 35 kt.

Sunday the winds in the southern waters will start to diminish
near the coast and become southerly. Southerly winds of 10 to 15
kt are possible off the mendocino coast. This will likely create
confused seas with the steep northwest waves and the short steep
southerly waves. Sunday night into Monday the winds will continue
to diminish as the area of low pressure approaches from the
south. Tuesday currently looks to have the lightest winds. Mid to
late week moderate to strong northerlies and steep seas are
expected to return. Mkk

Fire weather
Northeasterly winds gusting to around 20-30 mph are expected for
elevations above 1500 feet in del norte county this afternoon
through tomorrow morning. In combination with poor overnight rh
recoveries in the teens and 20s and sufficiently dry fuels, a
locally critical fire weather threat exists. A red flag warning
has been issued for fire zone 203 (upper smith) in interior del
norte county from 5pm this afternoon to 8am Sunday for elevations
above 1500 feet. We did consider including zone 204 (lower middle
klamath) which includes sern del norte, nern humboldt, and wrn
siskiyou counties however winds appear to be a bit weaker in this
zone and rh recoveries just slightly better so have opted to only
headline this zone at the moment however this zone will be watched
for possible issuance later today.

There is a chance for thunderstorms Tuesday afternoon and evening
across trinity and mendocino counties (fire zones 283 and 277).

These storms should be wet however the exact details and evolution
of this event are still questionable due to model differences.

Wci

Eka watches warnings advisories
Ca... Red flag warning from 5 pm this afternoon to 8 am pdt Sunday for
caz203.

Northwest california coastal waters... Small craft advisory until 11 pm pdt Sunday for pzz450-455.

Gale warning until 9 pm pdt Sunday for pzz470.

Gale warning until 11 pm pdt Sunday 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 32 mi48 min SW 2.9 G 5.1 53°F 53°F1014.8 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 33 mi32 min NNW 7.8 G 12 1014 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA13 mi46 minN 010.00 miA Few Clouds73°F57°F57%1011.5 hPa

Wind History from UKI (wind in knots)
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Last 24hrE33SE8SE6SE844NE5E3S7S6S6SE6S4S4S5E3CalmCalmCalmSE3CalmCalmCalm
1 day agoCalmE5CalmCalmNW10NW8N8N8CalmCalmCalmCalmCalmCalmS3S5S5S6S5CalmSE4SE3CalmCalm
2 days agoCalm535NW11
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Tide / Current Tables for Albion, California
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Albion
Click for Map
Sat -- 03:55 AM PDT     -0.61 feet Low Tide
Sat -- 04:10 AM PDT     Moonrise
Sat -- 06:32 AM PDT     Sunrise
Sat -- 10:49 AM PDT     5.05 feet High Tide
Sat -- 03:47 PM PDT     2.30 feet Low Tide
Sat -- 06:45 PM PDT     Moonset
Sat -- 08:04 PM PDT     Sunset
Sat -- 09:49 PM PDT     6.69 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.720.5-0.4-0.6-0.30.51.62.944.854.73.93.12.52.32.73.64.65.76.56.76.2

Tide / Current Tables for Mendocino, Mendocino Bay, California
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Mendocino
Click for Map
Sat -- 03:59 AM PDT     -0.69 feet Low Tide
Sat -- 04:10 AM PDT     Moonrise
Sat -- 06:32 AM PDT     Sunrise
Sat -- 10:39 AM PDT     4.70 feet High Tide
Sat -- 03:36 PM PDT     2.10 feet Low Tide
Sat -- 06:45 PM PDT     Moonset
Sat -- 08:04 PM PDT     Sunset
Sat -- 09:49 PM PDT     6.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.72.10.7-0.3-0.7-0.40.51.7344.64.74.23.52.72.22.12.63.54.65.76.46.76.2

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.