Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Philo, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:53AMSunset 8:25PM Sunday May 20, 2018 6:05 PM PDT (01:05 UTC) Moonrise 10:17AMMoonset 12:00AM Illumination 36% Phase: Waxing Crescent; Moon at 6 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 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 241 Pm Pdt Sun May 20 2018
.small craft advisory in effect through late Monday night...
Tonight..NW winds 25 to 30 kt...becoming 20 to 30 kt after midnight. Wind waves 6 to 9 ft...subsiding to 4 to 7 ft after midnight. W swell 3 to 4 ft at 11 seconds.
Mon..NW winds 20 to 25 kt with gusts up to 35 kt. Wind waves 5 to 8 ft. W swell 3 to 4 ft at 11 seconds.
Mon night..NW winds 15 to 25 kt with gusts up to 35 kt. Wind waves 4 to 7 ft. NW swell 4 to 5 ft at 10 seconds and sw around 3 ft at 21 seconds.
Tue..NW winds 10 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell around 5 ft at 10 seconds and sw around 3 ft at 20 seconds.
Tue night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. Mixed swell nw 4 to 5 ft at 10 seconds and sw around 3 ft at 19 seconds.
Wed..SW winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell nw 4 to 5 ft and sw 3 to 4 ft.
Wed night..W winds up to 10 kt. Wind waves 2 ft or less. Mixed swell nw around 4 ft and sw 3 to 4 ft.
Thu..S winds around 5 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 5 ft and S 3 to 4 ft.
Fri..S winds up to 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft and sw around 3 ft.
PZZ500 241 Pm Pdt Sun May 20 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to strong northwesterly winds will persist over the coastal waters through Monday in response to a tight north to south pressure gradient along the coast. These winds will result in steep wind waves as well and produce hazardous conditions for small crafts. A long period southerly swell will increase and mix with northwesterly swell by Monday morning, gradually increasing through much of the week.

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 202147
afdeka
area forecast discussion
national weather service eureka ca
247 pm pdt Sun may 20 2018

Synopsis Areas of coastal marine stratus will continue to be
very persistent through the upcoming week, with only localized or
temporary areas of sunshine. Monday will have very limited shower
or thunderstorm activity over the interior mountains, with more
widespread storms expected Tuesday and especially Wednesday.

Discussion Very deep marine layer around 4000 feet made it well
inland this morning, and with steady onshore flow continuing, has
struggled to retreat out of most of humboldt and del norte
counties, as well as western mendocino. With northerly winds
starting to pick up, the divergent flow downwind of CAPE blanco is
resulting in some clearing near crescent city. As high pressure
builds over washington and oregon, and a thermal trough
strengthens over interior california, the low-level northerly flow
will accelerate into Monday. The flow will also tend offshore over
del norte county, as well as between CAPE mendocino and the
northern mendocino coast, which should promote clearer skies there
even tonight into Monday morning. A building ridge aloft should
result in a lowering inversion and a shallower marine layer
heading into the upcoming week, resulting in less of an inland
marine air intrusion, and warmer temperatures inland. While the
northerly trajectory will keep the flow onshore over much of
humboldt county, the stronger winds and shallower marine layer may
at least mean there will be a better chance for afternoon or
evening clearing along the coast between ferndale and trinidad
Monday.

Aside from stratus and brisk winds along the coast, we have a
few weak thunderstorms around northeast trinity county, and will
linger along the northeast periphery of trinity county through
early evening. The main feature driving our weather for the
upcoming week will be an upper-level low tracking southward across
california through Monday, before lifting back to the north
across nevada, idaho, and eastern oregon Tuesday and Wednesday.

Brief high pressure aloft on Monday will bring drier and more
stable air to limit afternoon shower and thunderstorm activity
over the mountains of eastern trinity and northeast mendocino
county. However, as the aforementioned low tracks back northward
Tuesday and Wednesday, the low and mid-level flow will turn more
easterly and southerly, with increasing moisture and instability.

Tuesday afternoon will probably feature storms in the same areas
as today. Wednesday looks like the greatest threat for more
widespread and perhaps stronger storms, but do not expect any
threat back toward the coast.

The late week period will feature at least temporarily more stable
conditions as high pressure aloft returns. Inland temperatures
will be slightly above normal for late may. Coastal stratus will
likely become more persistent, even in those areas that do manage
some clearing early in the week. Model guidance is starting to
latch on to another upper- level low and weak associated surface
low which will approach our coast from the west Friday and
Saturday. This will have the potential to deliver a bit more
widespread shower and thunderstorm activity to our region, but
details will remain sketchy for now. Aad

Aviation Expect a period ofVFR conditions for much of the next
24 hours around crescent city, as the low-level flow turns more
offshore, and clearing skies expand south of CAPE blanco. Much of
humboldt county and acv will remain socked in the clouds with MVFR
conditions perhaps settling back to ifr conditions at times for
early Monday morning. The marine layer should be shallower on
Monday, so expect less inland intrusion compared to today. That
should include uki, with clear skies through Monday there. A few
thunderstorms will be found until early evening over trinity
county, but these will diminish tonight, with only an isolated
cell possible around there on Monday afternoon.

Marine Moderate northerlies will increase tonight bringing near
gale force gusts across the waters by Monday. Short period seas will
build in response to the winds, first south of CAPE mendocino this
evening and then northward through Monday afternoon. As increasing
winds become more widespread, steep seas will approach 7 to 10 feet.

Beyond that, the pressure gradient will relax and allow winds to
decrease and, subsequently, seas will settle mid to late next week.

The existing small craft advisories remain in effect through Tuesday
morning. Additionally, a long period south swell and mid-period
northwest swell will continue to impact the waters over the next
several days. Kml

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory from 9 pm
this evening to 5 pm pdt Tuesday for pzz450.

Small craft advisory until 5 pm pdt Tuesday for pzz455-470-475.

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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 mi48 min WNW 7 G 12 55°F 49°F1015.9 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 28 mi56 min NW 23 G 29 1015.3 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA13 mi70 minWNW 910.00 miFair67°F45°F45%1012.1 hPa

Wind History from UKI (wind in knots)
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Last 24hrN9
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N9N9N5N6N6CalmN9N7NW10NW8N12
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1 day agoN12
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NW17N9NE10NW3W3N3NW4CalmCalmCalmNW3CalmW3CalmN4NE7N7NE10N12N12
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2 days agoN8N7N7N6N6N4CalmW3CalmNW3CalmCalmCalmCalm3N4CalmCalmCalmE4NW105NW8N14
G20

Tide / Current Tables for Albion, California
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Albion
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Sun -- 12:56 AM PDT     Moonset
Sun -- 02:59 AM PDT     5.52 feet High Tide
Sun -- 05:57 AM PDT     Sunrise
Sun -- 10:02 AM PDT     -0.96 feet Low Tide
Sun -- 11:18 AM PDT     Moonrise
Sun -- 05:25 PM PDT     4.81 feet High Tide
Sun -- 08:26 PM PDT     Sunset
Sun -- 10:37 PM PDT     2.64 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.94.75.35.55.24.43.11.60.2-0.6-1-0.701.12.23.44.34.84.74.33.73.12.72.7

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Sun -- 12:55 AM PDT     Moonset
Sun -- 01:06 AM PDT     0.65 knots Max Flood
Sun -- 03:46 AM PDT     -0.00 knots Slack
Sun -- 05:58 AM PDT     Sunrise
Sun -- 07:16 AM PDT     -1.37 knots Max Ebb
Sun -- 11:15 AM PDT     0.00 knots Slack
Sun -- 11:18 AM PDT     Moonrise
Sun -- 02:24 PM PDT     1.07 knots Max Flood
Sun -- 05:57 PM PDT     -0.00 knots Slack
Sun -- 08:09 PM PDT     -0.64 knots Max Ebb
Sun -- 08:25 PM PDT     Sunset
Sun -- 11:42 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.70.60.3-0.1-0.6-1.1-1.4-1.3-1-0.6-0.10.40.81.110.80.5-0-0.5-0.6-0.6-0.4-0.2

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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Wind Forecast for Eureka, CA (21,6,7,8)
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Ground Weather Radar Station Beal AFB, 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.