Thursday, June20, 2019 L-36.com


Marine Weather and Tides
Scotia, CA

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:43AMSunset 8:52PM Thursday June 20, 2019 4:07 PM PDT (23:07 UTC) Moonrise 10:39PMMoonset 7:49AM Illumination 88% Phase: Waning Gibbous; Moon at 18 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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PZZ410 227 pm pst Fri feb 15 2019 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 222 pm pst, doppler radar indicated lines of showers and isolated Thunderstorms over the waters north of cape mendocino, capable of producing winds to around 30 knots and small hail. This activity was moving east-northeast at 30 knots. Precautionary/preparedness actions... Water spouts are possible along with stronger Thunderstorms... Locally higher waves...and lightning strikes. Boaters should seek safe harbor immediately until these storms pass. && lat...lon 4174 12417 4154 12405 4153 12405 4154 12408 4124 12410 4114 12416 4089 12413 4084 12418 4086 12410 4082 12410 4065 12431 4060 12418 4062 12424 4063 12432 4045 12440 4047 12579 4129 12555 4168 12568 4178 12579
PZZ400 309 Pm Pdt Thu Jun 20 2019
Synopsis for northern california waters..Gale force northerly winds and steep hazardous seas will remain for much of the coastal waters through Saturday. Some modest improvement is expected on Sunday, followed by more significant lessening of winds and seas heading into next week.


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 202255
afdeka
area forecast discussion
national weather service eureka ca
355 pm pdt Thu jun 20 2019

Synopsis A dry upper trough passing through will maintain
sunny and breezy weather for much of northwest california through
Friday. Near normal temperatures in the interior today will warm
slightly above normal this weekend before a more substantial
cooling trend commences next week.

Discussion Only minor changes were made to the going forecast
package, with overall sunny, dry and breezy weather continuing
through the weekend. An upper level trough passing southeastward
across the pacific northwest has brought a cooler and drier
airmass to our region today. Temperatures inland are running 10 to
15 degrees cooler than yesterday, and even a few degrees lower at
the coast. The exception is along the mendocino coast, where the
coastal stratus has retreated to the south today, giving way to a
bit more sunshine and milder temperatures. However, despite the
sunshine today, many locations are feeling a cool breeze, thanks
in part to the upper level trough passage, along with an increased
pressure gradient toward the coast as thermal troughing has
shifted back inland. Gusts along exposed portions of the coastal
plain and over the hills and ridges into the 30 to 40 mph range
have been common. This will continue to be the case heading
through Friday, and while winds will relax a little through the
weekend, it will remain breezy in exposed areas.

Geopotential heights rebound slightly on Friday and temperatures
should start to edge upward a bit in the valleys. Gusty winds will
likely put a cap on afternoon highs again, however. Lows may
start out "cool" Friday morning, in the lower to mid 40s in some
of the colder valleys. Strong north winds will also make it
miserable in the mountains, especially in the king range where
northerlies have been gusting to 55 to 63 mph for the last couple
of days nights.

Medium range deterministic models and ensemble forecast systems
continue to indicate a large trough dropping southward from the
gulf of alaska next week. This trough will bring cooling to the
interior. Highs inland will still be quite pleasant through, in
the mid 70s to mid 80s in the interior valleys. Frost is not
expected at this time for any of the interior valleys. Coastal
areas may also start to see more cloud cover, though there is
still a great deal of uncertainty regarding coastal stratus next
week as northerly flow offshore decreases.

Aviation Robust north winds persisted across the north coast
air terminals overnight through afternoon. Conditions are fairly
unchanging through evening with cec staying gusty and winds
decoupling by late evening at acv. With uncertainty, models
indicating possible stratus returning in the morning at acv.

Stratus occurred in the far south mendocino coast with the marine
layer tops about 2000-2200 feet. Inland areas wereVFR. A surge of
stratus advected from sts-near the mendocino border.

Marine A large area of surface high pressure located over the
nern pac combined with low pressure over cntrl ca and the great
basin continues to yield a tight pressure gradient over the coastal
waters of nwrn ca. Gale force northerlies are occurring as a result
over the eka outer waters, and extending into portions of the
inner waters. The pressure gradient is tighter closer to the coast
today, allowing for stronger winds over the nearshore waters
compared to the last couple of days. Whether there is enough
coverage of gale force gusts over the inner waters for gale
warnings is debatable, but either way these winds are producing
hazardous seas which are propagating across the eka inner waters.

Model guidance indicates these conditions will generally continue
through the weekend. Gale warnings have been extended through
Saturday evening, and while there should be some modest
improvement heading into Sunday, there may still be some gale
force gusts over the outer waters on Sunday. Hazardous seas
warnings for the inner waters may need to be extended into
Saturday as well, with at least small craft advisory conditions
lingering into Sunday there.

Heading into next week it looks like winds and seas will finally
diminish more significantly, especially north of CAPE mendocino.

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Hazardous seas warning
until 11 pm pdt Friday for pzz450-455.

Gale warning until 9 pm pdt Saturday for pzz470-475.

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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 mi38 min 49°F10 ft
46022 - EEL RIVER - 17NM West-Southwest of Eureka, CA 33 mi38 min N 21 G 25 1018.1 hPa
HBYC1 - 9418767 - North Spit, CA 37 mi92 min 52°F1018 hPa

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 mi73 minWNW 22 G 26 miA Few Clouds and Breezy63°F46°F56%1017.3 hPa

Wind History from FOT (wind in knots)
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W11W7W5CalmCalmE3CalmSE5CalmCalmE4CalmCalmN4NW7NW9W12W12
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Tide / Current Tables for Cape Mendocino, California
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Cape Mendocino
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Thu -- 12:57 AM PDT     5.60 feet High Tide
Thu -- 05:47 AM PDT     Sunrise
Thu -- 08:21 AM PDT     -0.74 feet Low Tide
Thu -- 08:49 AM PDT     Moonset
Thu -- 03:25 PM PDT     4.56 feet High Tide
Thu -- 08:29 PM PDT     3.08 feet Low Tide
Thu -- 08:51 PM PDT     Sunset
Thu -- 11:39 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.45.65.34.63.420.7-0.3-0.7-0.6012.13.24.14.54.54.23.83.43.13.13.54.1

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Thu -- 01:42 AM PDT     -0.00 knots Slack
Thu -- 05:05 AM PDT     -1.39 knots Max Ebb
Thu -- 05:47 AM PDT     Sunrise
Thu -- 08:49 AM PDT     Moonset
Thu -- 09:06 AM PDT     0.00 knots Slack
Thu -- 12:09 PM PDT     1.05 knots Max Flood
Thu -- 03:37 PM PDT     -0.00 knots Slack
Thu -- 05:43 PM PDT     -0.60 knots Max Ebb
Thu -- 08:50 PM PDT     Sunset
Thu -- 09:01 PM PDT     0.00 knots Slack
Thu -- 11:38 PM PDT     Moonrise
Thu -- 11:42 PM PDT     0.61 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.3-0.1-0.7-1.2-1.4-1.3-1-0.5-0.10.50.9110.70.3-0.2-0.5-0.6-0.5-0.3-00.30.6

Weather Map and Satellite Images
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wmap_P
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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Eureka, CA (19,4,5,8)
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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.