Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Shelter Cove, 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 7:02AMSunset 7:17PM Wednesday September 20, 2017 12:32 AM PDT (07:32 UTC) Moonrise 6:25AMMoonset 6:54PM Illumination 0% Phase: New Moon; Moon at 29 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- 908 Pm Pdt Tue Sep 19 2017
.small craft advisory in effect through late Thursday night...
Tonight..SW winds 5 to 10 kt. Waves nw 2 ft at 5 seconds... And nw 11 ft at 14 seconds. Widespread showers.
Wed..NW winds 5 to 15 kt. Waves W 4 ft at 5 seconds...and nw 9 ft at 13 seconds. Scattered showers.
Wed night..NW winds 5 to 15 kt. Waves W 5 ft at 5 seconds... And nw 8 ft at 11 seconds. A slight chance of showers.
Thu..NW winds 5 to 15 kt. Waves nw 4 ft at 6 seconds...and nw 7 ft at 11 seconds.
Thu night..NW winds 5 to 15 kt. Waves nw 5 ft at 5 seconds... And nw 6 ft at 10 seconds.
Fri..NW winds 10 to 15 kt. Waves nw 8 ft at 8 seconds.
Sat..NW winds 5 to 15 kt. Waves N 6 ft at 6 seconds.
Sun..N winds 5 to 15 kt. Waves N 4 ft at 5 seconds...and nw 2 ft at 11 seconds.
PZZ400 908 Pm Pdt Tue Sep 19 2017
Synopsis for northern california waters..A long period nw swell will bring large seas to the waters through Wednesday, then gradually subside through rest of the week. A cold front will bring gusty S to sw winds to the waters tonight with gusts to 20 kt possible. Building high pressure will bring increasing N winds late this week.

7 Day Forecast for Marine Location Near Shelter Cove, CA
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location: 40.03, -124.07     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 192114
afdeka
area forecast discussion
national weather service eureka ca
214 pm pdt Tue sep 19 2017

Synopsis
Showers and cooler temperatures will persist through
Thursday due to an unseasonably cold upper level low. High
pressure will rebuild this weekend leading to a warming and drying
trend into the early portion of next week.

Discussion
Rain will start to increase again late this afternoon into this
evening as a frontal system moves toward the north coast. We will
see a period of gusty southerly winds in advance of the front this
evening, primarily over the ridges and coastal headlands,
followed by a rapid shift to the northwest early Wednesday. The
southerly downslope flow in the lee of the king range may delay
the arrival of rain for the eureka area. The high resolution
models capture the lee side drying the best.

The front will move across the area overnight through early
Wednesday morning and provide a period of moderate to heavy rain.

Totals of a quarter to half an inch are expected for del norte and
humboldt counties. The west slopes and higher elevations will no
doubt see greater quantities due to the enhancement from
topography. A few hundredths to tenth or two will be possible for
mendocino and trinity counties.

Cold air aloft and greater instability will follow behind the
front on Wednesday. On and off showers will probably continue
through the day on Wednesday for del norte and humboldt counties
as a post frontal trough embedded in NW flow approaches the north
coast. The potential for low topped convection will increase by
wed evening with 500mb temperatures plummeting to -25c over the
coastal waters. The upper trough will dig SW and away from land
during this time frame and prevent thunderstorms from reaching the
coast.

Colder and drier air will settle over the area on thu. There will
be a threat for morning frost in the interior valleys. The
greatest threat will be across trinity county, however some spots
in northern and eastern mendocino county may also see early
morning frost. The threat for early morning frost in the valleys
will continue on Fri and perhaps into Sat even as the air warms
aloft.

The chance for showers will continue on thu. The models were still
not in agreement. The nam12 and GFS dry us out, while the ecmwf
continues to indicate the potential for showers. There will
probably be a fair amount of cumulus with daytime heating thanks
to the cold air aloft. Thus, a few terrain driven showers may
sprout up over the mountains. The cold weather will moderate this
weekend as high pressure builds back over our region. An offshore
flow will result in a warming and drying trend this weekend that
will last into the early portion of next week.

Aviation
Local aviation sites remain under the influence of an upper level
low which has ushered in cloudy and wet conditions. An associated
frontal system tonight, which may be a little more impactful, will
continue to advect a multi-layer blend of clouds across the north
coast and northern interior areas. CIGS will stayVFR with spotty
MVFR through the afternoon with occasional light sprinkles. A warm
front will proceed the cold front this evening, so therefore
rain showers amounts will increase overnight and CIGS will lower.

Acv & cec can expect ifr-lifr CIGS vis overnight... While uki may see
MVFR CIGS in the morning.

Marine
Buoy observations this afternoon show a mix of rising and
falling wave heights as one of the first large swells of the season
moves through the region. Majority of the buoys north of cape
mendocino are reporting wave heights of 11 to 13 feet at roughly 14
seconds with buoy 22 being the only site reporting an increase in
wave height. South of CAPE mendocino buoy 14 is reporting building
waves, however; all sites should start to will be seeing throughout
the rest of the week. Small craft advisories will remain in effect
for these conditions, but may still need to be adjusted if they fall
below criteria earlier than expected. Winds during this time frame
will remain moderate during this time frame, however; they're
currently blowing from the south and will turn back to the north-
northwest over the next 24 hours. We will then experience
increasing northerly winds later this week as high pressure builds
offshore. Kr kml

Eka watches warnings advisories
Ca... Beach hazards statement through Wednesday evening for
caz101-103-104-109.

Northwest california coastal waters... Small craft advisory until 3 am pdt
Friday for pzz450-455-470- 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) 40 mi40 min 60°F10 ft
HBYC1 - 9418767 - North Spit, CA 52 mi56 min S 16 G 19 58°F 56°F1014.8 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, CA36 mi57 minESE 145.00 miOvercast55°F53°F94%1015.6 hPa

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Last 24hrSE3SE3SE4S4SE3SE3SE4SE5SE5E4N3N11N7N11NW11
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1 day agoCalmCalmNW5NW6NW6NW7W3NW5NW4NW6NW8N5NW10NW10NW9NW12NW9NW9NW6NW5CalmCalmCalmSE4
2 days agoCalmW3SE3SE4CalmCalmSE7SE7SE6SW3NW4N3N4NW10NW12NW11NW9NW7NW4CalmSE4CalmSE3Calm

Tide / Current Tables for Shelter Cove, California
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Shelter Cove
Click for Map
Wed -- 05:47 AM PDT     0.24 feet Low Tide
Wed -- 07:02 AM PDT     Sunrise
Wed -- 07:25 AM PDT     Moonrise
Wed -- 12:03 PM PDT     5.91 feet High Tide
Wed -- 06:05 PM PDT     0.85 feet Low Tide
Wed -- 07:16 PM PDT     Sunset
Wed -- 07:53 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.15.44.12.71.30.50.30.81.83.24.65.55.95.64.73.52.21.20.81.123.24.55.5

Tide / Current Tables for Punta Gorda, California Current
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Punta Gorda
Click for Map
Wed -- 12:13 AM PDT     -0.00 knots Slack
Wed -- 03:08 AM PDT     -1.32 knots Max Ebb
Wed -- 06:48 AM PDT     0.00 knots Slack
Wed -- 07:03 AM PDT     Sunrise
Wed -- 07:26 AM PDT     Moonrise
Wed -- 09:45 AM PDT     1.17 knots Max Flood
Wed -- 12:45 PM PDT     -0.00 knots Slack
Wed -- 03:31 PM PDT     -1.20 knots Max Ebb
Wed -- 07:05 PM PDT     0.00 knots Slack
Wed -- 07:17 PM PDT     Sunset
Wed -- 07:55 PM PDT     Moonset
Wed -- 10:01 PM PDT     1.13 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0.5-1.1-1.3-1.2-1-0.50.10.71.11.210.5-0.2-0.8-1.2-1.2-1-0.6-0.10.511.11

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 (3,6,7,8)
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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.