Friday, August18, 2017 L-36.com


Marine Weather and Tides
Coupeville, 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 6:09AMSunset 8:19PM Friday August 18, 2017 8:40 PM PDT (03:40 UTC) Moonrise 1:36AMMoonset 5:15PM Illumination 10% Phase: Waning Crescent; Moon at 26 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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PZZ134 Admiralty Inlet- 235 Pm Pdt Fri Aug 18 2017
.small craft advisory in effect from 6 pm pdt this evening through late tonight...
Tonight..NW wind 15 to 25 kt easing to 10 to 20 kt late tonight. Wind waves 2 to 4 ft.
Sat..NW wind to 10 kt. Wind waves 1 ft or less.
Sat night..NW wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..NW wind to 10 kt. Wind waves 1 ft or less.
Sun night..NW wind 5 to 15 kt. Wind waves 2 ft or less.
Mon..NW wind to 10 kt. Wind waves 1 ft or less.
Mon night..NW wind to 10 kt. Wind waves 1 ft or less.
Tue..NW wind 5 to 15 kt. Wind waves 2 ft or less.
Wed..Variable wind to 10 kt becoming nw. Wind waves 1 ft or less.
PZZ100 235 Pm Pdt Fri Aug 18 2017
Synopsis for the northern and central washington coastal and inland waters..A typical august pattern will prevail through the middle of next week. Expect onshore flow of varying strength to persist due to high pres offshore and lower pres east of the cascades.

7 Day Forecast for Marine Location Near Coupeville, WA
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location: 48.22, -122.69     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 182140
afdsew
area forecast discussion
national weather service seattle wa
240 pm pdt Fri aug 18 2017

Synopsis Onshore flow will increase this evening behind a weak
system moving by to the north of the region. Clouds will increase
this evening and there will be a chance of showers, mainly in the
cascades and with a puget sound convergence zone. Clouds will
decrease on Saturday. Another weak system will move by to the
north of the area on Sunday. High pressure at the surface and
aloft will give dry and warmer weather to the area Monday and
Tuesday. Another weak system will move across mainly the northern
portions of the area later Wednesday through Thursday night.

Short term Changes were made to the short term forecast for
tonight to increase clouds in the interior and to include a chance
of showers in the cascades and in the central puget sound area due
to a potential convergence zone. Otherwise, only minor updates to
move toward the new model consensus were made to the short term
forecast.

Details: while clouds have diminished from about everett down to
tacoma, satellite imagery shows abundant cloud cover over the
olympic peninsula, the northern interior zones, the willapa
hills, and the northern portions of the cascades. Onshore pressure
gradients are increasing at this time and will become rather
strong early this evening as a weak system moves by to the north
of the area and higher pressure builds in from the west. Short
term models now show the rapid increase in moisture below 6000 to
7000 feet this evening and the development of some showers and a
convergence zone around everett that will push southward to about
tacoma. With the increased consensus of the short term models,
cloud cover and pops were increased tonight for the puget sound
area and the west slopes of the cascades.

Flat ridging offshore is expected to shunt another weakening
frontal system to the north of the area Sunday or so (a bit slower
in the more recent model solutions). While some light showers may
impact the northwestern olympic peninsula, it appears that the
main impact of this dying feature will be to bring some higher
stratus into the northern portions of area and to the coast. Sunday
high temperatures will likely be near or slightly higher than
Saturday.

Ridging aloft will build offshore Sunday night and will move east
across the area later Monday and Monday night. The ridging will
result in clearing late Sunday night into Monday morning and a
warming trend. At this time, it appears that skies will be nearly
clear in the interior for the viewing of the partial solar
eclipse in western washington. With the ridging and warming aloft,
highs on Monday may reach 80 in the interior from seattle
southward (but temperatures will possibly be held down a couple of
degrees due to the reduced insolation that will occur due to the
eclipse).

On Tuesday, we will see the offshore ridge shift eastward into
western montana by late in the afternoon. The eastward movement of
the upper ridge will induce an increase in onshore flow, so it
will be cooler on the coast and near the gaps in the terrain.

Albrecht

Long term The ECMWF is showing better run to run consistency
than the gfs, and the latest GFS solutions are trending toward the
ecmwf.

The extended period will feature the transit of an upper
level low or trough to the north of the area during the latter
half of next week. This will result in an increase in onshore flow
and clouds and will give cooler daytime high temperatures. Even
the weaker ECMWF shows a possibility of showers across the area
later Wednesday through Thursday night, so they were included in
today's extended forecast. The GFS appears to be backing away from
its solution of a deep upper low moving across the region mid to
late week.

Some ridging is possible beginning next Friday or Saturday, for
dry and warmer weather. The GFS is more extreme with the ridging;
a model blend about 2 3 toward the ECMWF was used for the forecast
fields for next Friday and beyond. Albrecht

Aviation West to northwest flow aloft over western washington
this afternoon will continue tonight and Saturday, as the upper
trough over british columbia moves east and an upper ridge builds
offshore. Surface high pressure remains offshore with lower
pressure east of the cascades, and moderately strong onshore flow
will prevail. The air mass is somewhat moist, mainly below
8000 ft.

There was a mix of cloud cover over the forecast area at 2 pm,
with the coast covered by marine stratus and generallyVFR
conditions inland with ceilings mainly 035-070. Additional cloud
layers associated with the weak upper trough should remain over
the area this afternoon and evening, mainly between 4000 and
10,000 ft. Stronger onshore flow this evening and tonight will
probably push low stratus into most of the western washington
interior lowlands late tonight.

Ksea... Wind backed to southerly at 2 pm, but the trend should be
toward northwest winds 6-12 kt this afternoon, then north to
northeast after sunset, and then light and variable overnight.

Winds on Saturday should again begin southerly and veer to
northwest. A layer of clouds should move into the puget sound
region in the next hour or two with ceilings bkn-ovc070. Low
stratus with ceilings 010-014 is likely late tonight. Mcdonnal

Marine A weak system moving by to the north will result in
increasing onshore flow over western washington later this
afternoon and this evening. Gale warnings are in effect for the
central and eastern strait of juan de fuca, along with small craft
advisories for admiralty inlet and the northern inland waters.

Otherwise, a typical august pattern will prevail through
the middle of next week; onshore flow of varying strength will
persist due to high pressure offshore and lower pressure east of
the cascades. Small craft advisory westerlies are possible in
the central and eastern strait of juan de fuca in the evening and
early morning hours beginning Saturday evening and continuing
into the middle of next week. Mcdonnal

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory from midnight tonight to noon pdt Saturday
for coastal waters from CAPE flattery to james island 10 to
60 nm-coastal waters from james island to point grenville
10 to 60 nm-coastal waters from point grenville to cape
shoalwater 10 to 60 nm.

Gale warning from 6 pm this evening to 3 am pdt Saturday for
central u.S. Waters strait of juan de fuca-east entrance
u.S. Waters strait of juan de fuca.

Small craft advisory from 6 pm this evening to 3 am pdt Saturday
for admiralty inlet-northern inland waters including the
san juan islands.

Small craft advisory until 6 pm pdt this evening for central
u.S. Waters strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTWW1 - 9444900 - Port Townsend, WA 8 mi52 min WSW 12 G 19 62°F 53°F1020.8 hPa
SISW1 - Smith Island, WA 11 mi40 min WSW 25 G 27 56°F 1019.8 hPa (-0.4)
PBFW1 - Padilla Bay Reserve, WA 21 mi70 min SSW 6 64°F 1020 hPa56°F
46088 - New Dungeness, WA (Hein Bank) 26 mi50 min W 18 G 21 60°F 53°F2 ft1018.7 hPa (-0.4)54°F
FRDW1 - 9449880 - Friday Harbor, WA 28 mi64 min WSW 8 G 13 67°F 53°F1019.4 hPa
46120 35 mi41 min W 7.8 67°F 1019.3 hPa57°F
46118 35 mi110 min ESE 12 63°F 1018.8 hPa58°F
PTAW1 - 9444090 - Port Angeles, WA 40 mi64 min 13 G 24 60°F 53°F1021.1 hPa
WPOW1 - West Point, WA 41 mi40 min NE 6 G 7 63°F 1020.3 hPa (-0.3)57°F
CPMW1 44 mi52 min SSE 8.9 G 11
CHYW1 - 9449424 - Cherry Point, WA 45 mi52 min SSE 8.9 G 12 62°F 53°F1018.5 hPa
EBSW1 - 9447130 - Seattle, WA 47 mi52 min NW 2.9 G 5.1 70°F 56°F1019.9 hPa

Wind History for Port Townsend, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Whidbey Island Naval Air Station - Ault Field, WA10 mi1.7 hrsWSW 1410.00 miMostly Cloudy63°F53°F70%1021.3 hPa
Burlington/Mount Vernon, Skagit Regional Airport, WA22 mi45 minSSW 79.00 miA Few Clouds63°F53°F73%1020.3 hPa

Wind History from NUW (wind in knots)
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Last 24hrW7SW8SW9SW9SW9SW8SW6SW12SW10SW7SW6S9SE8SE7S8SW10SW7W6SW12SW10SW11SW13SW12
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1 day agoSW9W5SW6NE4CalmCalmSW4SW5SW8SW11SW10SW10SW13W9SW9SW9W10W10W10W7W7W8SW8SW8
2 days agoSW6SW5W7W43W7SW8SW6SW7SW5S5SW6SW7SW10SW7SW9SW10SW8W7W8W5SW7SW11
G16
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Tide / Current Tables for Coupeville, Washington
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Coupeville
Click for Map
Fri -- 01:33 AM PDT     10.82 feet High Tide
Fri -- 02:35 AM PDT     Moonrise
Fri -- 06:09 AM PDT     Sunrise
Fri -- 08:50 AM PDT     -1.18 feet Low Tide
Fri -- 04:21 PM PDT     10.93 feet High Tide
Fri -- 06:14 PM PDT     Moonset
Fri -- 08:18 PM PDT     Sunset
Fri -- 09:23 PM PDT     6.35 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
9.910.710.79.98.25.93.30.9-0.7-1.2-0.41.33.76.48.610.210.910.89.88.57.16.46.57.2

Tide / Current Tables for Point Wilson, 1.4 miles NE of, Washington Current
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Point Wilson
Click for MapFlood direction 112 true
Ebb direction 297 true

Fri -- 02:01 AM PDT     -0.00 knots Slack
Fri -- 02:36 AM PDT     Moonrise
Fri -- 05:56 AM PDT     -4.51 knots Max Ebb
Fri -- 06:09 AM PDT     Sunrise
Fri -- 09:11 AM PDT     0.00 knots Slack
Fri -- 12:29 PM PDT     5.09 knots Max Flood
Fri -- 04:49 PM PDT     -0.00 knots Slack
Fri -- 06:14 PM PDT     Moonset
Fri -- 07:14 PM PDT     -2.56 knots Max Ebb
Fri -- 08:18 PM PDT     Sunset
Fri -- 10:00 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.90-1.4-2.9-4.1-4.5-3.9-2.4-0.423.9554.33.11.4-0.3-1.8-2.5-2.3-1.3-01.2

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 (23,6,7,8)
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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.