Thursday, November23, 2017 L-36.com


Marine Weather and Tides
Herron Island, WA

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 7:26AMSunset 4:30PM Thursday November 23, 2017 6:51 AM PST (14:51 UTC) Moonrise 11:33AMMoonset 9:01PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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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PZZ135 Puget Sound And Hood Canal- 245 Am Pst Thu Nov 23 2017
.small craft advisory in effect through late tonight...
Today..SW wind 15 to 25 kt. Wind waves 2 to 4 ft. Rain in the morning then a chance of showers in the afternoon.
Tonight..S wind 15 to 25 kt easing to 10 to 20 kt after midnight. Wind waves 2 to 4 ft subsiding to 1 to 3 ft after midnight. A chance of showers.
Fri..S wind 10 to 20 kt rising to 15 to 25 kt in the afternoon. Wind waves 1 to 3 ft building to 2 to 4 ft. A chance of showers.
Fri night..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
Sat..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sat night..SE wind 5 to 15 kt becoming sw 20 to 30 kt after midnight. Wind waves 2 ft or less building to 3 to 5 ft after midnight.
Sun..S wind 15 to 25 kt becoming se to 10 kt. Wind waves 2 to 4 ft subsiding to 1 ft or less.
Mon..S wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 245 Am Pst Thu Nov 23 2017
Synopsis for the northern and central washington coastal and inland waters..Strong onshore flow will continue today as a trough moves inland. The next front will stall over southern british columbia on Friday. A stronger system will impact the area on Saturday night into Sunday with gales possible.

7 Day Forecast for Marine Location Near Herron Island, WA
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location: 47.2, -122.94     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 231056
afdsew
area forecast discussion
national weather service seattle wa
300 am pst Thu nov 23 2017

Synopsis Rain will turn to scattered showers and much cooler,
more seasonable temperatures today as a cold front moves inland. The
scattered showers will continue into Friday as an upper level trough
follows the front. The next frontal system is expected to bring more
rain later Saturday into Sunday morning. This active weather pattern
should continue into early next week.

Short term Changes to this unseasonably warm moist weather will
unfold today. The subtropical moisture source will shift inland as a
cold front tracks onshore and the flow aloft will become more
westerly. This change will usher in a much cooler more seasonable
late nov air mass with rain changing to showers by afternoon. 850
millibar temperatures around 9 deg c are expected to drop to around
0 deg c late today. High temperatures today likely occurred early
this morning. Snow levels should drop close to 4000 ft by this
evening. The decrease in rainfall and the dropping snow levels will
help ease river runoff as well.

The offshore positive tilt upper trough should move onshore tonight
with Friday serving as a day in between weather systems with
scattered light showers in the queue. Looking upstream early this
morning, another upper level trough in the bering sea is forecast to
dig southeast off the coast Friday and Saturday. As it does so, the
flow aloft will once again back to ssw but the associated air mass
will not nearly be as warm and moist as the past few days.

These dynamics will developing another frontal system with warm
frontal rain spreading north into western washington during the day
Saturday and snow levels bouncing back up again ranging from 5000 to
7000 ft. This system will also develop a surface low that the progs
similarly track from south to north just inside 130w to across cape
scott on vancouver island Saturday night. Surface pressure rises
across western washington following the low and the associated cold
front should result in some blustery conditions by Sunday morning.

Buehner

Long term The offshore upper trough is forecast to track onshore
with a cooler air mass and associated showers Sunday afternoon into
Monday. It is at this point that the mid range guidance begins to
diverge. Overall, ridging aloft is expected Monday for decreasing
showers. But then the question becomes whether an incoming warm
front will produce any rain Monday night into Tuesday as the gfs,
canadian and euro all differ on this solution. This issue continues
into Wednesday with more definitive resolution likely in the coming
days. Buehner

Aviation Moist, SW flow will continue over western wa today for
rain across the area. Expect mainly MVFR to ifr ceilings with patchy
fog possible this morning. A trough will cross the area this
afternoon for strong onshore flow and showers but should see
ceilings improving. Showers will mainly affect the mountains tonight
with strong westerly flow aloft. 33
ksea... MVFR this morning improving toVFR late this afternoon. South
winds 10-15 kt becoming southwest and increasing to 15g25 kt by 21z.

33

Marine Strong onshore flow will continue today as a trough
moves inland - expect small craft advisory winds over most waters.

Winds will ease after midnight tonight in the interior. The next
front will stall over southern b.C. On Friday then dissipate.

Another vigorous system will arrive around Saturday night. Strong
southerly gradients are possible over the entire area Sunday. Gales
are possible over most waters with small craft advisory conditions
over puget sound and hood canal. 33

Hydrology Another frontal system moved into western washington
overnight, with additional rainfall amounts of 1 to 3 inches -
highest over the olympics and north cascades. The snow level was
around 8000 feet. We can expected another 0.75 to 1.5 inches of rain
today, mostly this morning, as the system moves through. The snow
level will gradually fall, dropping to around 4000 feet late today
as precipitation decreases.

The list of rivers under flood warnings grew overnight. Rivers that
have already or still are flooding include the satsop, elwha,
dungeness, skokomish, the reach of the cowlitz from randle to riffe
lake, the snoqualmie, skykomish, snohomish, stillaguamish, skagit,
and nooksack. Major flooding is expected on the skagit river near
concrete and possibly downstream where the river GOES through mount
vernon. In addition, heavy rain caused some flooding of the smaller
rivers that flow off the east side of the olympic mountains (little
quilcene, big quilcene, dosewallips, duckabush, hamma hamma).

Flooding could still develop on a few more rivers. We're most
concerned about the reach of the nisqually near national and the
reach of the white at r street bridge near auburn. Keep in mind,
though, that there is a chance of at least minor flooding on any of
the flood-prone rivers in our forecast area. A flood watch remains
in effect through today, and additional warnings could be issued
this morning.

For the current list of flood watches and warnings, please check:


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 13 mi44 min 7.8 55°F 1009.5 hPa53°F
TCNW1 - 9446484 - Tacoma, WA 28 mi52 min 57°F 53°F1010.5 hPa (-1.9)
TCMW1 - 9446482 - Tacoma Met, WA 28 mi52 min W 6 G 8.9
WPOW1 - West Point, WA 42 mi52 min S 20 G 23 55°F 1009.3 hPa (-1.3)52°F
46120 48 mi47 min W 18 56°F 1008.3 hPa56°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Shelton, Shelton Sanderson Field, WA11 mi59 minSW 810.00 miLight Rain55°F54°F96%1009.6 hPa
Olympia, Olympia Airport, WA15 mi58 minSSW 58.00 miLight Rain56°F55°F100%1010.6 hPa
Tacoma, Tacoma Narrows Airport, WA20 mi59 minSW 56.00 miLight Rain Fog/Mist54°F54°F100%1010.1 hPa
Bremerton, Bremerton National Airport, WA21 mi56 minS 8 G 1610.00 miLight Rain53°F52°F96%1011.4 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi1.9 hrsS 610.00 miLight Rain56°F56°F100%1011.1 hPa

Wind History from SHN (wind in knots)
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Last 24hrCalmNW43CalmCalmS3CalmS5S6S7S6S5S7S9S9SW16
G21
SW12SW14SW12SW11SW11W8SW6SW8
1 day agoCalmE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmS3E3CalmCalmCalmCalm
2 days agoS3SW3SW11SW11SW8W10SW15
G22
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G27
SW11SW9NW5CalmN5N3NE3NE3NE3N4N4CalmCalmCalmN5

Tide / Current Tables for Arcadia, Washington
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Arcadia
Click for Map
Thu -- 02:20 AM PST     -0.07 feet Low Tide
Thu -- 07:27 AM PST     Sunrise
Thu -- 09:34 AM PST     15.01 feet High Tide
Thu -- 11:31 AM PST     Moonrise
Thu -- 03:33 PM PST     7.21 feet Low Tide
Thu -- 04:28 PM PST     Sunset
Thu -- 07:40 PM PST     11.27 feet High Tide
Thu -- 09:01 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.21.100.32.14.98.211.213.614.814.91412.310.38.47.47.48.49.81111.210.69.27.2

Tide / Current Tables for Hammersley Inlet, 0.8 miles E of Libby Pt, Washington Current
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Hammersley Inlet
Click for Map
Thu -- 03:23 AM PST     0.00 knots Slack
Thu -- 06:14 AM PST     2.87 knots Max Flood
Thu -- 07:27 AM PST     Sunrise
Thu -- 09:32 AM PST     -0.00 knots Slack
Thu -- 11:31 AM PST     Moonrise
Thu -- 01:14 PM PST     -1.72 knots Max Ebb
Thu -- 04:28 PM PST     Sunset
Thu -- 04:38 PM PST     0.00 knots Slack
Thu -- 06:21 PM PST     1.11 knots Max Flood
Thu -- 07:57 PM PST     -0.00 knots Slack
Thu -- 09:01 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.9-2.5-1.6-0.50.82.12.82.61.70.6-0.4-1.1-1.5-1.7-1.6-1.3-0.60.31.10.9-0-0.9-1.6-2.2

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Seattle, WA (9,2,3,4)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.