Wednesday, May24, 2017 L-36.com


Marine Weather and Tides
Port Townsend, WA

Version 3.4
What's New / NOTES
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 5:18AMSunset 8:56PM Tuesday May 23, 2017 9:04 PM PDT (04:04 UTC) Moonrise 3:30AMMoonset 5:15PM Illumination 2% Phase: Waning Crescent; Moon at 28 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- 300 Pm Pdt Tue May 23 2017
.gale warning in effect through late tonight...
Tonight..W to nw wind 25 to 40 kt easing to 20 to 30 kt after midnight. Wind waves 5 to 7 ft subsiding to 3 to 5 ft after midnight. A slight chance of showers in the evening.
Wed..W wind 15 to 25 kt becoming nw 5 to 15 kt in the afternoon. Wind waves 2 to 4 ft subsiding to 2 ft or less in the afternoon. A slight chance of showers.
Wed night..NW wind to 10 kt becoming 5 to 15 kt after midnight. Wind waves 2 ft or less.
Thu..Variable wind to 10 kt becoming nw 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Thu night..NW wind 5 to 15 kt easing to 10 kt after midnight. Wind waves 2 ft or less.
Fri..Light wind becoming nw to 10 kt in the afternoon. Wind waves 1 ft or less.
Fri night..N wind to 10 kt. Wind waves 1 ft or less.
Sat..Light wind becoming nw to 10 kt. Wind waves 1 ft or less.
Sun..Light wind becoming nw to 10 kt. Wind waves 1 ft or less.
PZZ100 300 Pm Pdt Tue May 23 2017
Synopsis for the northern and central washington coastal and inland waters..An offshore surface ridge will maintain an onshore flow pattern across western wa this week. An upper level trough approaching from the northwest will trigger very strong onshore flow tonight with gales over the northern interior waters. Small craft advisory winds and seas are expected over all other waters. Onshore flow will weaken by Wednesday morning and remain light to moderate through the rest of the week.

7 Day Forecast for Marine Location Near Port Townsend, WA
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location: 48.1, -122.76     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 232304
afdsew
area forecast discussion
national weather service seattle wa
404 pm pdt Tue may 23 2017

Synopsis A strong cold front will sweep through western
washington this evening, bringing windy conditions to areas near
the strait and admiralty inlet. A much cooler air mass will be in
place on Wednesday. Warmer and drier upper ridging will rebound
off the coast on Thursday, then pass western washington on
Saturday.

Short term An upper trough with a strong height fall center
will move east-southeast across southern b.C. Through tonight.

This will sweep a strong cold front out of the northwest through
western washington this evening. Strong onshore flow has now
developed in response, with the observed 3 pm uil-bli pressure
gradient at an impressive +6.6 mb. A strong surge of westerly
winds continues to gather steam through the strait of juan de
fuca, which will take aim at whidbey island and the admiralty
inlet area early this evening. Later this evening around 8-10 pm,
the west-northwest winds will penetrate all the way into western
snohomish county, where gusts to 40 mph are expected. For the
everett area in particular, w-nw is a less common direction for
stronger winds, which could increase the impacts of 40 mph gusts.

The current configuration of wind highlights looks good, so no
update to the wind advisories and warnings in the near future.

Westerly flow will gradually weaken during the overnight hours.

Otherwise, a few light showers are forecast tonight where upslope
flow into the mountains or low- level convergence downwind of the
olympic mtns can maximize low- level lift.

An enhancement of showers is expected on Wed morning as the main
upper trough axis swings through. The main upper trough will then
exit to the northern rockies later Wednesday. A piece of the
upper trough along with some colder air aloft will linger over the
inland northwest until Thursday night, so afternoon showers and
thunderstorms near the cascade crest are forecast on Thursday pm.

The lowlands are forecast to be rain-free on Thursday.

A well-defined upper ridge axis will move to near 130w on Friday,
bringing the biggest day of day-over-day temperature rises in the
week ahead, aided partially by significant weakening of cooling
low-level onshore flow. Haner

Long term A warm and dry upper ridge axis will pass directly
over western washington on Saturday. The upper ridge axis will
be over eastern washington on Sunday. Cooling seabreezes will
strengthen at the immediate coast, but the rest of western
washington should have little change on Sunday. Some towering
cumulus and an isolated shower could form near the cascade crest
in the afternoon as a turn to light southerly flow aloft takes
place.

For Monday and next Tuesday, the long-range models are pretty
close with their 500 mb height values. The main difference is that
the GFS is a little more amplified with the pattern than the
ecmwf. So the gfs's forecast of a stronger southerly component to
the upper flow is more supportive of late afternoon and early
evening shower thunderstorm development along the cascade crest.

The ECMWF in contrast does not show this outcome, given its more
westerly component to the upper flow. For the lowlands, both
solutions are rain-free. Haner

Aviation A cold deep upper level low over central b.C. At 23z
will move SE across southern b.C. Arriving over southern alberta
around 15z Wednesday. Strong NW flow aloft will prevail over W wa.

Low level onshore flow will be quite strong through this evening.

Areas around the north interior including the strait of juan de
fuca have localized very windy conditions.

Overall, the air mass will remain generally dry withVFR
conditions. Stratus currently along the coast will move part way
inland through the strait of juan de fuca and between khqm and
kshn, but strong mixing from the onshore flow should prevent
widespread coverage of MVFR ifr stratus. In addition, low level
convergence may develop between kpae and ksea 00z-08z for
localized CIGS bkn025-060.

Ksea... GoodVFR conditions through 00z. A convergence zone may be
in the vicinity from 02z through 06z with CIGS possibly down to
bkn025 for short periods of time. With the convergence zone lying
across central puget sound winds at kbfi and especially will be
erratic. Confidence is low. Best guess is that SW winds 5-15 kt
will last until around 02z then become variable 02z-04z as the cz
is overhead. Around 05z winds may shift e-ne 5-12 kt as the cz
shifts S and weakens. Kam

Marine An upper level low is moving SE across southern b.C.

This afternoon and tonight. Onshore flow has increased
dramatically with a 6.6 mb gradient through the strait at 3 pm.

Race rocks was 44g49kt at 3 pm so in coordination with canada the
central and east strait will be upgraded to a storm warning for a
few hours through 8 pm. The gale through the strait will spread
over the N inland waters around the san juans and through
admiralty inlet albeit with slightly weaker winds. A gale is also
in effect for the north part of puget sound, north of seattle.

This gale is a little shakier and NW winds could end up topping
out around 30 kt. Winds will likely peak in the strait early this
evening then weaken gradually overnight. Winds in admiralty inlet
and N puget sound will peak a couple hours later and ease a little
later than winds in the strait. Winds should ease fairly rapidly
after midnight, but SCA conditions in the strait may persist into
Wednesday morning.

The surface ridge offshore will maintain light to moderate
onshore flow the rest of this week.

A steep fresh swell 10 to 13 feet at 8 to 10 seconds is expected
to reach the coastal waters later this evening and persist into
Thursday morning. Kam

Sew watches warnings advisories
Wa... High wind warning until 1 am pdt Wednesday for admiralty inlet
area.

Wind advisory until 1 am pdt Wednesday for eastern strait of
juan de fuca-san juan county.

Wind advisory until 1 am pdt Wednesday for everett and vicinity.

Pz... Small craft advisory until 5 am pdt Thursday for coastal waters
from CAPE flattery to james island 10 to 60 nm-coastal
waters from CAPE flattery to james island out 10 nm-coastal
waters from james island to point grenville 10 to 60 nm-
coastal waters from james island to point grenville out 10
nm-coastal waters from point grenville to CAPE shoalwater
10 to 60 nm-coastal waters from point grenville to cape
shoalwater out 10 nm.

Small craft advisory for rough bar until 9 am pdt Thursday for
grays harbor bar.

Storm warning until 8 pm pdt this evening for central u.S.

Waters strait of juan de fuca-east entrance u.S. Waters
strait of juan de fuca.

Gale warning from 8 pm this evening to 5 am pdt Wednesday for
central u.S. Waters strait of juan de fuca-east entrance
u.S. Waters strait of juan de fuca.

Gale warning until 2 am pdt Wednesday for admiralty inlet-
northern inland waters including the san juan islands.

Small craft advisory until 5 pm pdt Wednesday for west entrance
u.S. Waters strait of juan de fuca.

Gale warning until 1 am pdt Wednesday for puget sound and hood
canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PTWW1 - 9444900 - Port Townsend, WA 1 mi52 min SW 20 G 33 53°F 50°F1015.3 hPa
SISW1 - Smith Island, WA 16 mi64 min SW 42 G 50 52°F 1013.4 hPa (-1.4)
46088 - New Dungeness, WA (Hein Bank) 27 mi44 min W 27 G 35 52°F 50°F6 ft1014.5 hPa44°F
46120 30 mi44 min E 12 56°F 1014.1 hPa45°F
PBFW1 - Padilla Bay Reserve, WA 30 mi94 min NW 8.9 58°F 1015 hPa41°F
FRDW1 - 9449880 - Friday Harbor, WA 34 mi88 min WSW 14 G 28 54°F 50°F1014.4 hPa
WPOW1 - West Point, WA 35 mi64 min ENE 11 G 13 58°F 1014.7 hPa (-0.0)49°F
PTAW1 - 9444090 - Port Angeles, WA 36 mi88 min 25 G 32 52°F 51°F1016.9 hPa
EBSW1 - 9447130 - Seattle, WA 41 mi46 min SE 1.9 G 4.1 59°F 51°F1014.8 hPa
46118 44 mi79 min SE 16 59°F 1012.9 hPa38°F

Wind History for Port Townsend, WA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Whidbey Island, Naval Air Station, WA19 mi68 minW 29 G 4410.00 miFair and Windy54°F41°F62%1015.5 hPa

Wind History from NUW (wind in knots)
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Last 24hrCalmSW4CalmE4CalmSW5SW7S4SW8SW8SW9SW8SW11
G20
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1 day agoCalmW4SW3SE3SE5SE4SE4CalmN4CalmCalmCalmNW6W6W5W4W7W8W6W4W6W6W4W3
2 days agoW8SW5SW5W5W64Calm3SW8SW5CalmW4W4W4W6W6W5W4W5NW4W4W5W4Calm

Tide / Current Tables for Point Hudson, Washington
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Point Hudson
Click for Map
Wed -- 02:48 AM PDT     8.74 feet High Tide
Wed -- 05:04 AM PDT     Moonrise
Wed -- 05:21 AM PDT     Sunrise
Wed -- 09:29 AM PDT     -1.06 feet Low Tide
Wed -- 04:58 PM PDT     7.99 feet High Tide
Wed -- 07:33 PM PDT     Moonset
Wed -- 08:55 PM PDT     Sunset
Wed -- 09:34 PM PDT     4.69 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.77.88.58.78.26.74.52.10.1-0.9-0.9-01.43.14.96.47.687.66.65.54.84.85.3

Tide / Current Tables for Port Townsend, 0.5 miles S of Point Hudson, Washington Current
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Port Townsend
Click for MapFlood direction 115 true
Ebb direction 10 true

Wed -- 01:01 AM PDT     -0.00 knots Slack
Wed -- 05:04 AM PDT     Moonrise
Wed -- 05:19 AM PDT     -0.78 knots Max Ebb
Wed -- 05:21 AM PDT     Sunrise
Wed -- 08:05 AM PDT     0.00 knots Slack
Wed -- 11:52 AM PDT     2.30 knots Max Flood
Wed -- 03:01 PM PDT     -0.01 knots Slack
Wed -- 06:14 PM PDT     -0.48 knots Max Ebb
Wed -- 07:32 PM PDT     Moonset
Wed -- 08:32 PM PDT     0.00 knots Slack
Wed -- 08:55 PM PDT     Sunset
Wed -- 11:38 PM PDT     1.16 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.80-0.2-0.5-0.7-0.8-0.7-0.4-00.91.72.22.31.91.10-0.2-0.4-0.5-0.4-0.20.30.81.1

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 (0,6,7,8)
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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.