Saturday, April29, 2017 L-36.com


Marine Weather and Tides
Coupeville, WA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:52AMSunset 8:23PM Friday April 28, 2017 10:29 PM PDT (05:29 UTC) Moonrise 6:55AMMoonset 10:15PM Illumination 11% Phase: Waxing Crescent; Moon at 3 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- 900 Pm Pdt Fri Apr 28 2017
Tonight..NW wind 10 to 15 kt. Wind waves 1 to 2 ft.
Sat..Variable wind to 10 kt. Wind waves 1 ft or less. A chance of rain in the afternoon.
Sat night..SE wind 10 to 20 kt rising to 15 to 25 kt. Wind waves 1 to 3 ft...building to 2 to 4 ft. Rain likely in the evening then showers likely after midnight.
Sun..NW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sun night..NW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Mon..SE wind to 10 kt. Wind waves 1 ft or less.
Mon night..NW wind to 10 kt. Wind waves 1 ft or less.
Tue..Light wind becoming nw to 10 kt. Wind waves 1 ft or less.
Wed..Light wind becoming nw to 10 kt. Wind waves 1 ft or less.
PZZ100 900 Pm Pdt Fri Apr 28 2017
Synopsis for the northern and central washington coastal and inland waters..Moderate onshore flow will bring small craft advisory winds to the central and eastern strait this evening...easing late. A front will bring increasing southerly winds to the coastal waters Saturday afternoon and to the inland waters Saturday night. Strong onshore flow Sunday will ease Monday through Wednesday.

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 290410
afdsew
area forecast discussion
national weather service seattle wa
910 pm pdt Fri apr 28 2017

Synopsis An upper level ridge will bring a dry period tonight
through Saturday morning as it crosses western washington. A weak
cold front will bring a little light rain to the coast and north
part Saturday morning before spreading light rain across the rest of
the area Saturday afternoon and evening. Scattered post-frontal
showers will be around late Saturday night and Sunday. A weak warm
front could bring some light rain on Monday. An upper level ridge
may bring warmer weather to the area mid next week but some spotty
light rain is also possible.

Short term The low amplitude upper level ridge just offshore
along 130w this evening will move over W wa Saturday morning then
quickly E by Saturday afternoon. Dry weather is expected tonight but
high clouds from the upstream cold front will be increasing over the
area tonight. Mid level clouds from the tail-gating cold front will
spread over the area Saturday morning. GFS and ECMWF are in general
agreement that low clouds and light rain will reach the coast and n
interior in the morning before 18z/11 am, then spread across the
rest of the interior during the afternoon. Rain-shadowing from w
flow aloft across the olympics could reduce rain amounts over puget
sound. The cold front will reach the coast early in the evening then
move over the cascades after midnight, so Saturday evening should be
the best period for light rain.

Westerly flow aloft and low level onshore flow will develop behind
the cold front late Saturday night through Sunday. This will keep w
wa cool with scattered showers. Showers should be more prevalent
along the coast, over the mountains, and around the greater puget
sound region where another convergence zone is expected to form. The
nw and SW interior will probably see the least shower activity on
Sunday. High temperatures on Sunday will remain in the mid 50s which
is several degrees below normal and just slightly cooler than
Saturday.

A weak surface low with weak warm advection could bring a little
light rain to the area on Monday. However, the models continue to be
inconsistent with this system so confidence remains low. Kam

Long term Previous discussion from the 240 pm afd... Models show a
progressive pattern next week with a ridge moving across the area
during the Tuesday through Thursday timeframe followed by a trough
late next week. The problem is with the strength of the ridge. 12z
models (both the GFS and ecmwf) show high heights with temperatures
possibly getting into the 70s from about seattle southward and weak
systems going by to the north of the area. The 00z runs from both
models were flatter with the ridge, stronger with the passing
frontal systems, and lower with the 500mb heights. The 12z ensembles
support the stronger ridge, but the ECMWF ensembles were less
aggressive with the height rises on the 00z run. With only moderate
confidence, conditions across most of the area for Tuesday through
Thursday were dried out and skies are advertised to be partly cloudy.

Temperatures were nudged upward in the direction of the new 12z
solutions - but will not yet advertise temperatures well into the
70s in our area. The models have had a tendency to overdevelop
ridges so far this season, so that seems to be the best direction
to go for now. Albrecht

Aviation High pressure offshore will move over western washington
tonight, then a front will approach the coast Saturday.

Light northwest flow aloft tonight will become moderate west-
southwesterly Saturday. The air mass is becoming mostly dry and
stable except for some isolated residualVFR stratus possible early
Saturday morning. Increasing high clouds Saturday afternoon and
evening. LowerVFR stratus will develop with some light rain
reaching the coast by afternoon... Spreading inland by evening.

Ksea... Northwesterly wind 5-9 kt this evening will become light
southerly after midnight. Dtm

Marine Residual onshore flow will weaken overnight with small
craft winds in the central and eastern strait easing late.

Otherwise, winds below 20 kt across the waters tonight. North-
northwesterly winds from tacoma northward in puget sound will switch
to light southerly after midnight.

A front will bring small craft advisory strength southerly winds
to the coastal waters by Saturday afternoon. Winds will spread to
inland waters with some advisory level winds possible, mainly
north of puget sound. Strong onshore flow Sunday will weaken
Monday and Tuesday with lighter winds expected. Dtm

Sew watches/warnings/advisories
Wa... None.

Pz... Small craft advisory central and eastern strait of juan de fuca
through 3 am pdt Saturday morning.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTWW1 - 9444900 - Port Townsend, WA 8 mi47 min WSW 6 G 11 49°F 50°F1027.7 hPa
SISW1 - Smith Island, WA 11 mi29 min WSW 9.9 G 17 49°F 1026.8 hPa (+0.0)
PBFW1 - Padilla Bay Reserve, WA 21 mi59 min ESE 1.9 48°F 1027 hPa42°F
46088 - New Dungeness, WA (Hein Bank) 26 mi39 min W 16 G 18 50°F 49°F1 ft1026.1 hPa (+0.0)42°F
FRDW1 - 9449880 - Friday Harbor, WA 28 mi53 min WSW 9.9 G 14 49°F 49°F1026.6 hPa
PTAW1 - 9444090 - Port Angeles, WA 40 mi53 min 8 G 13 49°F 51°F1027.6 hPa
WPOW1 - West Point, WA 41 mi29 min N 8.9 G 9.9 50°F 1026.7 hPa (+0.0)45°F
CPMW1 44 mi41 min SE 8 G 9.9 51°F
CHYW1 - 9449424 - Cherry Point, WA 45 mi41 min SE 6 G 7 1026.2 hPa
EBSW1 - 9447130 - Seattle, WA 47 mi41 min NNW 2.9 G 5.1 55°F 48°F1026.5 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, WA10 mi93 minWSW 710.00 miMostly Cloudy50°F41°F71%1028.1 hPa
Burlington/Mount Vernon, Skagit Regional Airport, WA22 mi34 minN 010.00 miFair45°F41°F87%1027.1 hPa

Wind History from NUW (wind in knots)
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Last 24hrW21
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W15W14W14W12W10W9NW5NW4CalmCalmW5W6W7W7W73W6W8W6W8W4W8W7
1 day agoW20
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2 days agoSE11SE13SE9SE7SE9S6SE7SE4SE4W7W7W7W12W15W18
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Tide / Current Tables for Coupeville, Washington
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Coupeville
Click for Map
Sat -- 01:43 AM PDT     5.15 feet Low Tide
Sat -- 05:54 AM PDT     Sunrise
Sat -- 07:08 AM PDT     11.38 feet High Tide
Sat -- 08:45 AM PDT     Moonrise
Sat -- 02:01 PM PDT     -2.22 feet Low Tide
Sat -- 08:22 PM PDT     Sunset
Sat -- 09:17 PM PDT     12.09 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.95.55.267.59.210.711.410.99.36.83.80.9-1.4-2.2-1.50.53.46.49.211.21211.810.7

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

Sat -- 02:21 AM PDT     0.00 knots Slack
Sat -- 04:43 AM PDT     2.58 knots Max Flood
Sat -- 05:55 AM PDT     Sunrise
Sat -- 07:46 AM PDT     -0.00 knots Slack
Sat -- 08:46 AM PDT     Moonrise
Sat -- 11:16 AM PDT     -5.06 knots Max Ebb
Sat -- 02:20 PM PDT     0.01 knots Slack
Sat -- 05:40 PM PDT     6.25 knots Max Flood
Sat -- 08:22 PM PDT     Sunset
Sat -- 10:01 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-3.3-2.2-0.61.12.32.62.11.1-0.4-2.3-4.1-5-4.7-3.2-0.824.566.25.54.12.20-1.9

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 (1,6,7,8)
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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.