Wednesday, September20, 2017 L-36.com


Marine Weather and Tides
Philo, 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 6:58AMSunset 7:12PM Wednesday September 20, 2017 9:12 AM PDT (16:12 UTC) Moonrise 6:23AMMoonset 6:51PM 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 843 Am Pdt Wed Sep 20 2017
.small craft advisory in effect from 3 pm pdt this afternoon through Thursday evening...
Today..NW winds 5 to 15 kt in the morning increasing to 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. NW swell 7 to 9 ft at 13 seconds. Chance of showers late in the morning.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft at 12 seconds.
Thu..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. NW swell 5 to 7 ft at 11 seconds.
Thu night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft at 11 seconds.
Fri..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft at 10 seconds.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft.
Sun..NW winds 10 kt. Wind waves 2 ft or less. W swell 3 to 4 ft...shifting to the nw 4 to 6 ft.
PZZ500 843 Am Pdt Wed Sep 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate long-period northwest swell will continue to affect the coastal waters today as swell periods slowly decrease over the next 12 to 24 hours. SWell heights will remain above 8 feet through this evening, particularly for the northern outer waters, then decrease through the remainder of the week. Northwest winds will increase again this afternoon/evening throughout the waters.

7 Day Forecast for Marine Location Near Philo, CA
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location: 39.15, -123.45     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 201210
afdeka
area forecast discussion
national weather service eureka ca
510 am pdt Wed sep 20 2017

Synopsis Cool weather will persist through the week as a cold
air mass drops south from the gulf of alaska. Periods of showers
will persist through Thursday and then wind down on Friday. High
pressure will rebuild this weekend leading to a warming and drying
trend that will last into the early portion of next week.

Discussion A weakening front will move southeast across the
area this morning. As of 4am, the front was just south of pt st
george where southerly winds have been decreasing. Rain thus far
has been light to moderate with most reliable rain gages
reporting a quarter to half an inch for del norte and northern
humboldt counties. Light rain will continue to spread south and
east across the remainder of the forecast area this morning. Most
locations should see measurable rain.

A break in the light rain is expected by mid or late morning as a
post frontal ridge develops. Cold air aloft coupled with moist nw
flow will likely produce on and off showers through the day,
primarily for the north coast. The potential for low topped
convection will increase this evening over the coastal waters as
500mb temperatures plummet to -25c or less. An isolated low top
storm will certainly be possible offshore over the coastal waters.

A colder air mass will start to settle over the area tonight.

Skies should become partly cloudy to clear across eastern trinity
and northern mendocino counties tonight. The longwave cooling
will allow temperatures to fall into the mid 30s in these
locations. Therefore, a frost advisory has been hoisted. The
threat for frost will continue Thursday night into early Friday
morning. If skies clear out completely, a few valley sites below
3000 feet in central eastern trinity county may dip to 32f or
less. Early morning minimums should moderate on Saturday, however
a few valley sites below 3000 feet may still dip into the mid 30s.

The chance for showers will continue on thu. The models were
still not in agreement. Another trough will drop down from the
north on thu. The ECMWF and GFS are now much drier and have this
wave dampening out considerably as it slides southward just
offshore over the coastal waters. The 00z nam12 was quite wet,
bringing another round of showers into the area north of the
cape. The 06z NAM dried out considerably and is now similar to
the two spectral models. We definitely could see more showers on
thu due to the cold air aloft. A few terrain driven showers may
sprout up with the daytime heating.

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. Dry weather and above normal
temperatures are expected next week as a longwave ridge dominates.

Aviation Lifr conditions will improve as the band of rain
continues to track southeastward through the morning hours. Expect
predominantlyVFR conditions across most of northwest california
this afternoon with some cumulus and a possible thunderstorm
primarily along the coast. MVFR to ifr conditions should then return
to the humboldt and del norte county coastlines tonight. Moisture
from the rains should help generate some interior valley clouds
tonight as well. Kml

Marine The northwesterly will subside through the next several
days with seas expected to fall below 10 feet today. As a result,
the small craft advisories were adjusted to expire today. First the
inner waters will expire later this morning then the outer waters
later this afternoon. Moderate winds will persist through the rest
of the work week before building high pressure brings increasing
north winds this weekend. Although, some gusty south winds will be
possible in the northern inner waters with the passage of a weak
boundary. Kml
beach surf conditions... A beach hazard statement remains in
effect until 9am pdt this morning. Seas have been trending
downward with nearly squared periods.

Eka watches warnings advisories
Ca... Beach hazards statement until 9 am pdt this morning for caz101-
103-104-109.

Frost advisory from 3 am to 8 am pdt Thursday for caz107-108-110-
111.

Northwest california coastal waters...

small craft advisory until 3 pm pdt this afternoon for pzz470-
475. Small craft advisory until 9 am pdt this morning for
pzz450-455.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 21 mi42 min NNW 1.9 G 2.9 56°F 53°F1014.7 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 28 mi32 min WSW 3.9 G 5.8 1013.8 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA13 mi76 minN 07.00 miLight Rain56°F54°F93%1013.2 hPa

Wind History from UKI (wind in knots)
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Last 24hrN7N9NW11
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N7N5N7N8N7N3N3CalmNW5W3CalmN3CalmCalmSE5
1 day agoNW9NW8NW7NW12
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NW6N6N9NW9NW8NW10E3NW6NW6N5NW5NW8CalmCalmN5
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N8N10N53N5CalmCalmNW3CalmCalmNW3CalmCalmNE4

Tide / Current Tables for Albion, California
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Albion
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Wed -- 05:40 AM PDT     0.33 feet Low Tide
Wed -- 07:01 AM PDT     Sunrise
Wed -- 07:24 AM PDT     Moonrise
Wed -- 12:11 PM PDT     5.74 feet High Tide
Wed -- 06:02 PM PDT     0.93 feet Low Tide
Wed -- 07:14 PM PDT     Sunset
Wed -- 07:52 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.85.13.92.51.20.50.40.91.834.35.25.75.54.73.42.21.30.91.223.14.35.2

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Wed -- 12:20 AM PDT     -0.00 knots Slack
Wed -- 03:15 AM PDT     -1.32 knots Max Ebb
Wed -- 06:55 AM PDT     0.00 knots Slack
Wed -- 07:01 AM PDT     Sunrise
Wed -- 07:24 AM PDT     Moonrise
Wed -- 09:52 AM PDT     1.17 knots Max Flood
Wed -- 12:52 PM PDT     -0.00 knots Slack
Wed -- 03:38 PM PDT     -1.20 knots Max Ebb
Wed -- 07:12 PM PDT     0.00 knots Slack
Wed -- 07:14 PM PDT     Sunset
Wed -- 07:52 PM PDT     Moonset
Wed -- 10:08 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
0.2-0.5-1.1-1.3-1.2-1-0.600.71.11.210.6-0.1-0.7-1.1-1.2-1-0.6-0.10.50.91.11

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 (12,3,4,5)
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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.