Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Tacoma, WA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 5:24AMSunset 8:48PM Sunday May 20, 2018 7:09 AM PDT (14:09 UTC) Moonrise 9:51AMMoonset 12:13AM Illumination 31% 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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PZZ135 Puget Sound And Hood Canal- 258 Am Pdt Sun May 20 2018
Today..Light wind. Wind waves less than 1 ft. A slight chance of showers.
Tonight..NE wind to 10 kt. Wind waves 1 ft or less.
Mon..Light wind. Wind waves less than 1 ft.
Mon night..NE wind to 10 kt. Wind waves 1 ft or less.
Tue..N wind 5 to 15 kt. Wind waves 2 ft or less.
Tue night..N wind to 10 kt. Wind waves 1 ft or less.
Wed..NW wind to 10 kt becoming sw. Wind waves 1 ft or less.
Thu..S wind to 10 kt becoming n. Wind waves 1 ft or less.
PZZ100 258 Am Pdt Sun May 20 2018
Synopsis for the northern and central washington coastal and inland waters..High pres offshore and lower pres east of the cascades will produce onshore flow for the next several days. Winds will be strongest in the central and eastern strait of juan de fuca during the late afternoon and evening hours each day.

7 Day Forecast for Marine Location Near Tacoma, WA
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location: 47.27, -122.43     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 201022
afdsew
area forecast discussion
national weather service seattle wa
322 am pdt Sun may 20 2018

Synopsis A weak upper level trough offshore this morning will
move into the area this afternoon and evening keeping a chance of
showers in the forecast with the best chances in the mountains. The
trough will dissipate over western washington early Monday
morning. An upper level ridge will begin to build over the area
later Monday and remain over the area for most of the week. The
flow aloft will become southerly in the middle of the week
bringing some moisture up from the south with a chance of showers
again for the mountains Wednesday.

Short term Satellite imagery shows cloudy skies over western
washington early this morning. Doppler radar still showing a few
light showers at 3 pm 10z. Temperatures with the cloud cover were
once again above normal for this time of the day, in the 50s.

Upper level trough just offshore early this morning will slowly
move over western washington today. Most of the energy associated
with the trough moving inland well to the south of the area. The
air mass is moist over the region with multiple cloud layers up to
8000 feet. While there is little in the way of dynamics with the
trough with the deep marine layer just a little lift could result
in a light shower so will keep the chance pops in the forecast.

Onshore surface gradients weakening during the day but with the
deep marine layer in place even the strong late may Sun will have
a hard time burning completely through the cloud cover. Some
sunbreaks in the afternoon for the interior which will help high
temperatures get into the 60s. Highs along the coast and near the
strait of juan de fuca will be around 60.

What is left of the trough dissipating over the area tonight. With
the trough axis right over western washington still a chance for
a mountain shower in the evening hours. Onshore flow increasing in
the evening hours but koth-ksea gradient peaking out near plus 3
mb and the khqm-ksea peaking below 2 mb so expect the marine
layer to be thinner overnight into Monday morning. Lows will be in
the mid 40s to mid 50s.

Upper level ridge building into western washington on Monday with
the surface gradients going northwesterly in the afternoon. With
the thinner marine layer and the lack of reinforcing onshore flow
expect plenty of sunshine in the afternoon after morning clouds.

Highs on Monday with more sunshine will be warmer, in the 60s to
lower 70s.

Upper level ridge remaining over western washington Monday night
into Tuesday with northwesterly surface gradients continuing into
Tuesday afternoon. 500 mb heights only in the mid 570 dms but
temperatures in the lower levels warming nicely with model 850 mb
temperatures in the plus 14 to 16c range Tuesday afternoon. Marine
layer will be confined to the coast late Monday night into
Tuesday morning. With more sunshine and warming temperatures aloft
highs on Tuesday in the 70s for most locations in the interior
and mid to upper 60s along the coast and near the water in the
north.

Long term Extended models in good agreement on Wednesday with
an upper level low off the california coast moving east and the
flow aloft over western washington becoming southerly. This will
push some mid high level moisture over the area. Air mass over the
mountains will be slightly unstable during the peak daytime
heating hours. This combined with the mid level moisture will
result in a chance of showers over the cascades on Wednesday.

Highs in the 70s will once again be common with some lower 80s
over the interior from seattle southward.

Surface gradients go onshore late in the day Wednesday with the
onshore flow weakening Thursday. Flow aloft becoming more
southwesterly eliminating the chance for mountain showers. Weak
marine push Wednesday night into Thursday morning with high
temperatures on Thursday 4 to 8 degrees cooler versus Wednesday.

Some small differences begin to show up in the models for Friday
and Saturday with the GFS moving the upper low northward faster
than the ECMWF solution. The further north GFS solution would
increase the chances for showers mainly over the mountains on
Saturday. South southwesterly flow aloft will keep the air mass
aloft warm over the region. Low level flow remaining onshore which
will keep highs in the mid 60s to mid 70s both days. Felton

Aviation An upper level trough axis lies over the offshore
waters this morning. The air mass is moist and generally stable with
light southwest flow aloft. The air mass will gradually dry today
with the flow aloft veering to northwesterly this evening as the
trough axis moves onshore. A mix of MVFR and low-endVFR ceilings
are expected to improve to mainlyVFR from mid-afternoon into the
evening hours. Some MVFR in stratus is expected to redevelop on
Monday morning as continued low level onshore flow brings some low
level marine cloudiness into the interior of western washington.

Ksea... MVFR ceilings are expected to persist through the morning
as residual moisture from yesterday's shower activity remains over
the region. Some improvement toVFR ceilings expected after about
21z. MVFR ceilings may redevelop after 07z tonight as stratus
pushes into the interior from the coast. Southwest winds 5 to 10
knots through the morning will make a gradual shift toward the
northwest by around 00z. 27

Marine High pressure offshore and lower pressure east of the
cascades will result in generally weak onshore flow the next
several days. Small craft advisory westerlies are likely in the
central and eastern strait of juan de fuca during the diurnal peak
late afternoon through early morning hours most days. Mcdonnal

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory from 3 pm this afternoon to 3 am pdt Monday
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCMW1 - 9446482 - Tacoma Met, WA 1 mi58 min WSW 5.1 G 7
TCNW1 - 9446484 - Tacoma, WA 1 mi58 min 55°F 50°F1016.6 hPa
46121 16 mi45 min 54°F 1016.2 hPa49°F
EBSW1 - 9447130 - Seattle, WA 23 mi52 min S 4.1 G 6 50°F1016.5 hPa
WPOW1 - West Point, WA 27 mi70 min S 9.9 G 11 53°F 1016.1 hPa (+0.7)50°F
46120 34 mi49 min WSW 5.8 53°F 1015.7 hPa52°F
46125 45 mi46 min 5.8 52°F 1015.5 hPa50°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tacoma, Tacoma Narrows Airport, WA8 mi77 minSW 610.00 miOvercast53°F48°F83%1016 hPa
Tacoma / McChord Air Force Base, WA8 mi72 minS 310.00 miOvercast53°F53°F100%1016.6 hPa
Seattle, Seattle-Tacoma International Airport, WA13 mi77 minS 510.00 miOvercast55°F51°F87%1016.6 hPa
Pierce County-Thun Field, WA14 mi75 minN 010.00 miOvercast54°F51°F94%1016.6 hPa
Fort Lewis / Gray U. S. Army Airfield, WA15 mi72 minSE 410.00 miOvercast53°F52°F99%1016.3 hPa
Boeing Field - King County International Airport, WA19 mi77 minSSW 410.00 miOvercast55°F48°F77%1016 hPa
Renton Municipal Airport, WA19 mi77 minS 410.00 miOvercast57°F48°F72%1016.4 hPa
Bremerton, Bremerton National Airport, WA23 mi74 minSSW 610.00 miOvercast52°F48°F89%1017.4 hPa

Wind History from TIW (wind in knots)
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Last 24hrCalmS4W35S5SW3W5SW7CalmS4S5S6SW4S5SW4W6SW5SW5SW3S5SW4SW7SW6S6
1 day agoSW4S4CalmS3W3W53S4SE3S5S5S3CalmCalmSW3W4CalmW3SW3CalmCalmCalmCalmSW3
2 days agoSW5S5S6W3W5SW76W7W5W6SW6SW6W5W63W4W3CalmSW4SW3CalmSW3W4W4

Tide / Current Tables for Tacoma, Commencement Bay, Washington
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Tacoma
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Sun -- 01:13 AM PDT     Moonset
Sun -- 03:51 AM PDT     6.56 feet Low Tide
Sun -- 05:27 AM PDT     Sunrise
Sun -- 08:31 AM PDT     9.93 feet High Tide
Sun -- 10:51 AM PDT     Moonrise
Sun -- 03:40 PM PDT     -1.37 feet Low Tide
Sun -- 08:45 PM PDT     Sunset
Sun -- 11:12 PM PDT     12.63 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.39.78.16.96.67.189.19.89.897.35.12.60.4-1.1-1.3-0.21.94.77.610.111.912.6

Tide / Current Tables for Discovery Island, 3.3 miles NE of, Washington Current
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Discovery Island
Click for Map
Sun -- 01:13 AM PDT     Moonset
Sun -- 02:25 AM PDT     -1.38 knots Max Ebb
Sun -- 05:27 AM PDT     Sunrise
Sun -- 06:34 AM PDT     0.00 knots Slack
Sun -- 07:55 AM PDT     0.42 knots Max Flood
Sun -- 09:22 AM PDT     -0.00 knots Slack
Sun -- 10:51 AM PDT     Moonrise
Sun -- 01:49 PM PDT     -1.88 knots Max Ebb
Sun -- 05:45 PM PDT     0.01 knots Slack
Sun -- 08:46 PM PDT     Sunset
Sun -- 08:49 PM PDT     2.19 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.5-1.1-1.3-1.3-1.1-0.7-0.20.20.40.2-0.3-0.8-1.4-1.8-1.9-1.7-1.2-0.60.31.322.21.91.1

Weather Map and Satellite Images
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wmap_P
GOES Local Image of PacificNorthwest    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 Seattle, WA (10,2,3,4)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.