Thursday, August17, 2017 L-36.com


Marine Weather and Tides
Scotia, 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 6:28AMSunset 8:12PM Thursday August 17, 2017 10:34 AM PDT (17:34 UTC) Moonrise 1:09AMMoonset 3:59PM Illumination 21% Phase: Waning Crescent; Moon at 25 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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This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ410 750 am pdt Thu aug 10 2017 a marine weather statement has been issued for the following areas... Waters from pt. St. George to cape mendocino ca out 60 nm... Humboldt bay bar... At 749 am pdt...doppler radar indicated a strong Thunderstorm... Capable of producing winds to around 30 knots. This Thunderstorm was located 16 nm west of eureka...moving southeast at 10 knots. Precautionary/preparedness actions... Mariners can expect gusty winds to around 30 knots...locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until this storm passes. && lat...lon 4082 12415 4082 12417 4085 12417 4076 12423 4081 12417 4069 12425 4071 12427 4069 12428 4063 12429 4063 12432 4050 12439 4087 12483 4108 12440 4093 12414 4085 12416 4087 12415 4086 12412
PZZ400 814 Am Pdt Thu Aug 17 2017
Synopsis for northern california waters..Strong to gale force winds will persist across the outer waters for the next several days as a thermal trough intensifies over interior california. Very steep seas will build in response to the winds and will persist through the weekend.

7 Day Forecast for Marine Location Near Scotia, CA
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location: 40.25, -124.37     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 171440
afdeka
area forecast discussion
national weather service eureka ca
740 am pdt Thu aug 17 2017

Synopsis High pressure will maintain hot weather conditions
for the interior through the weekend. Temperatures will moderate
early to mid next week.

Update Smoke continues to stream southwest from fires in
siskiyou county and southern oregon. This updated concerned
expanding the smoke coverage across much of del norte and humboldt
counties considering visibility restrictions are being observed
and there is a very obvious smoke layer aloft. Otherwise the
forecast remains on track and the previous discussion is below.

Rpa

Prev discussion issued 529 am pdt Thu aug 17 2017
discussion... An upper level ridge and a warm dry air mass
will dominate weather conditions across NW california through
the weekend. The only exception will be along the coast where
stratus and marine air will keep the weather cooler. The stratus
has been bottled up south of CAPE mendo through the night. The
latest high resolution NAM indicates southerly winds briefly
developing inside 10nm north of the CAPE today. The stratus will
have to fight the offshore flow and strong subsidence north of the
cape though. It may take til Friday or Saturday for stratus and
fog to return in earnest along the north coast. The latest model
guidance continues to show offshore flow continuing along the del
norte county coast through the weekend. Coastal del norte may not
see any stratus, only smoke filled skies.

High temperatures across the interior valleys will continue to
warm today. The heat risk will be moderate across central and
eastern trinity county as well as northeastern mendocino county
where high temperatures are expected to peak around 100 to 105f.

Folks are encouraged to take necessary precautions to avoid heat
related issues... And stay as hydrated as possible. Latest guidance
has temperatures remaining fairly hot through the weekend across
the interior.

The north coast should see warming today as an offshore wind flow
pattern suppresses the marine layer and limits the extent and
duration of stratus and fog especially along the del norte county
coast. There will be a distinct onshore component in the afternoon
and given the amount of smoke aloft, lower 70's remain doubtful.

The mendocino coast on the other end will continue to be socked-in
and cool due to a southerly push of stratus.

An upper level trough will slowly break down the ridge early to
mid next week. Interior temperatures will moderate while coastal
areas north of the CAPE see a return of diurnal stratus as the
flow becomes onshore. The models continue to indicate the
potential for storms over the interior Monday and Tuesday as
southeasterly flow aloft develops in relation to an upper level
low that is forecast to form offshore the central california
coast. Trinity county and northeastern mendocino county may be in
store for some showers and wet thunderstorms early next week. An
upstream trough should arrive mid to late next week, bringing
more cooling and perhaps a few showers to the northern and
western portions of the forecast area.

Aviation... Satellite imagery shows that the stratus this morning
can be found along the mendocino coast while other areas remain
clear. Kcec was bouncing around in visibilities and ceilings earlier
this morning but it appears that those conditions were due to smoke
from the wildfires in siskiyou county. Kacv has been reportingVFR
ceilings from smoke as well. Current thinking for the rest of this
morning is that the coastlines of humboldt and del norte counties
will remain stratus free. Model data suggests that stratus should
return to the humboldt coast later this afternoon and into the
evening. Northerly winds followed by offshore winds should keep kcec
and del norte county in the clear from any redevelopment of stratus.

Marine... The northerly wind regime will continue through the
weekend as high pressure builds over the eastern pacific and a
thermal trough strengthens over california. This has resulted in
strong to gale force winds over zone pzz470 (northern outer waters)
while the other areas see moderate to fresh breeze winds.

Subsequently, steep seas have been building with the largest waves
occurring over the outer waters this weekend.

Fire weather... Light to moderate offshore flow will persist
across the upper elevations of zones 203, 204 and 211 for the
next several nights and mornings. There will be subtle changes
each night morning, but the overall surface flow pattern chances
very little going into this weekend. The bottom line, hot and
dry through the weekend.

The focus of attention for Friday looks to occur over the extreme
east side of the CWA around the alps and yolla bolla spine.

Soundings and profiles indicate the potential for cumulus cloud
build ups with the heating of the day.

Next week is looking much more favorable for storms if the models
are correct. The GFS continues to show a cut-off low forming off
the central california coast early next week. The GFS continues
to indicate southeasterly flow aloft as well as instability on
Monday and Tuesday. We may be in store for isolated wet storms on
Monday and again on Tuesday, primarily in zones 283 and 277.

Confidence is by no means high at this time due to the variability
in the model data that far out.

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters...

small craft advisory until 9 pm pdt Sunday for pzz450-475.

Gale warning until 9 pm pdt Sunday for pzz470.

Hazardous seas warning until 9 am pdt this morning for pzz475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46213 - Cape Mendocino, CA (094) 19 mi43 min 54°F9 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 34 mi45 min WNW 3.9 G 3.9 58°F 56°F9 ft1016.4 hPa (+1.5)55°F
HBYC1 - 9418767 - North Spit, CA 37 mi59 min SSW 16 G 18 53°F 54°F1017 hPa
46244 - Humboldt Bay, North Spit, CA 45 mi44 min 58°F7 ft

Wind History for North Spit, Humboldt Bay, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Fortuna Rohnerville Airport, CA24 mi40 minNNW 410.00 miFair61°F55°F83%1016.9 hPa

Wind History from FOT (wind in knots)
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Last 24hrNW5NW10NW12NW12NW11NW12NW11NW11NW7NW4CalmCalmSE4SE3S4SE4SE5S5CalmCalmCalmCalmN4N5
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Tide / Current Tables for Cape Mendocino, California
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Cape Mendocino
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Thu -- 02:09 AM PDT     Moonrise
Thu -- 02:25 AM PDT     0.07 feet Low Tide
Thu -- 06:30 AM PDT     Sunrise
Thu -- 09:06 AM PDT     4.40 feet High Tide
Thu -- 02:07 PM PDT     2.58 feet Low Tide
Thu -- 04:59 PM PDT     Moonset
Thu -- 07:59 PM PDT     6.40 feet High Tide
Thu -- 08:11 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.60.10.20.71.52.43.44.14.44.33.83.32.82.62.83.44.45.36.16.46.15.34

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Thu -- 02:09 AM PDT     Moonrise
Thu -- 03:03 AM PDT     0.00 knots Slack
Thu -- 06:07 AM PDT     0.95 knots Max Flood
Thu -- 06:30 AM PDT     Sunrise
Thu -- 09:22 AM PDT     -0.00 knots Slack
Thu -- 11:32 AM PDT     -0.61 knots Max Ebb
Thu -- 02:52 PM PDT     0.00 knots Slack
Thu -- 04:59 PM PDT     Moonset
Thu -- 05:46 PM PDT     0.78 knots Max Flood
Thu -- 08:11 PM PDT     Sunset
Thu -- 08:39 PM PDT     -0.00 knots Slack
Thu -- 11:56 PM PDT     -1.40 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.1-0.9-0.5-00.50.810.90.60.2-0.3-0.6-0.6-0.5-0.300.40.70.80.60.3-0.2-0.8-1.3

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 (13,3,4,5)
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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.