Wednesday, October18, 2017 L-36.com


Marine Weather and Tides
Tacoma, 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 7:32AMSunset 6:16PM Wednesday October 18, 2017 4:57 PM PDT (23:57 UTC) Moonrise 5:10AMMoonset 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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PZZ135 Puget Sound And Hood Canal- 253 Pm Pdt Wed Oct 18 2017
.gale warning in effect until 9 pm pdt this evening...
.small craft advisory in effect from 9 pm pdt this evening through late tonight...
Tonight..S wind 25 to 35 kt easing to 15 to 25 kt. Wind waves 4 to 6 ft subsiding to 2 to 4 ft. Rain.
Thu..S wind 10 to 20 kt. Wind waves 1 to 3 ft. Showers.
Thu night..S wind 10 to 20 kt becoming sw 5 to 15 kt after midnight. Wind waves 1 to 3 ft. Showers.
Fri..S wind 5 to 15 kt becoming sw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Fri night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sat..SE wind to 10 kt becoming 5 to 15 kt in the afternoon. Wind waves 2 ft or less.
Sat night..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sun..SW wind 15 to 25 kt easing to 5 to 15 kt. Wind waves 2 to 4 ft subsiding to 2 ft or less.
Mon..SE wind to 10 kt becoming light. Wind waves 1 ft or less.
PZZ100 253 Pm Pdt Wed Oct 18 2017
Synopsis for the northern and central washington coastal and inland waters..The flow will ease tonight as a frontal band exits se. Onshore flow will prevail Thursday and Friday with swells reaching 20 feet over the coastal waters. Another strong frontal system will reach the area on Saturday. The flow will turn offshore early next week.

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 182301
afdsew
area forecast discussion
national weather service seattle wa
401 pm pdt Wed oct 18 2017

Synopsis A strong cold front will push slowly southeast across
western washington tonight. Heavy rain and windy conditions will
continue this evening until the cold front passes. Behind the
cold front, expect numerous showers with snow level dropping to
3500 feet by Friday and Friday night. Another strong front will
pass across the pacific northwest Saturday through Sunday giving
windy conditions and potentially heavy rainfall. Drier weather is
expected to develop early next week as a ridge of high pressure
strengthens to our south.

Short term Satellite and radar imagery show a strong front
sitting from central portions of vancouver island southwestward.

This front will push slowly southeast across the area this
evening. Heavy rain and windy conditions ahead of this front will
continue until the front passes by to the south. Pressure
gradients from portland to bellingham are now at 12.4 mb and will
peak within the next hour or so. Strong winds that have been
reported over the northern interior zones and in along the north
coast will shift southward into the seattle and southern i-5
corridor zones as well as the central coast shortly and continue
into the evening hours. High wind warnings remain in effect for
the coast and north interior zones and a wind advisory remains for
the interior zones from seattle southward. The wind warnings and
advisories will likely come to an end from the north during the
evening hours.

Rainfall so far has been heaviest on the west facing olympics and
coast with 2-3 inches. Expect the heaviest rainfall rates to
continue there, and develop in the north cascades, as strong 60 kt
wsw flow at 5000 ft and a moisture-rich tropical air mass streams
into the area ahead of the front. In the lowlands, rainfall will
pick up from about seattle or so southward between 4 and 8 pm and
rates could reach 0.5 inches per hour ahead of the front this
evening. Local urban flooding is possible in this area.

Precipitation will taper to showers Thursday through Friday or
Friday night with snow levels gradually falling to 3000-3500 feet
by Friday. Snowfall amounts in the mountains may require the
issuance of a winter weather advisory at times from later Thursday
through Friday.

The air mass is unstable behind the front, and there is a risk of
isolated thunderstorms over the coastal waters and the coastal
zones Thursday and Thursday night. Albrecht

Long term Another strong warm front will lift northward into
western washington on Saturday. An atmospheric river type event
is possible in the warm sector, especially across the southern
half of the forecast area later Saturday through Sunday. It will
also be windy across the region with strong south to southeast
pressure gradients being amplified as the winds aloft interact
with the terrain. While the exact location of the heavy rainfall
axis is still uncertain, model trends appear to be focusing on the
area from everett or seattle southward into extreme northern
oregon. Rainfall will gradually ease on Sunday night and Monday.

An upper ridge is expected to build northward into the pacific
northwest Monday into the middle of next week bringing a change to
dry and mild weather. Albrecht

Aviation A strong frontal band will shift SE through western
washington tonight. Winds will ease as this system exits but could
still see gusts to 20-40kt this evening, especially through the
interior. Rain will be moderate to heavy at times with ifr to
MVFR ceilings. Moist southwest flow will prevail on Thursday for
additional showers. 33
ksea... S winds will peak through 00-03z this evening with gusts to
30kt. Rain will be moderate to heavy at times through 06-09z as
the frontal boundary shifts SE through the area. MVFR to ifr
conditions are expected. Expect additional showers on Thursday
with moist SW flow over the area. S winds will prevail although
not as strong as today. 33

Marine Gales will end this evening as a strong frontal band
shifts SE and exits. However, will still see lingering small craft
advisory winds over most waters. Moderate to strong onshore flow
will continue through Thursday and Friday with seas building to
20-24 feet - a high surf advisory is in effect. Another vigorous
system will reach the area on Saturday. The flow will turn
offshore early next week. 33

Hydrology Heavy rainfall is falling now in the olympics and in
the north cascades. Total precipitation amounts of 4-6 inches can
be expected in the olympics, while the north cascades should see
3-5 inches. A large part of the interior lowlands, especially from
about seattle southward will exceed 1 inch, with a few places
south of seattle in the 1 to 3 inch range. The heavy rainfall
rates are accompanied by high snow levels well over 7000 feet.

Hydro models do not explicitly show flooding on area rivers.

However, river forecasts are close enough (within a foot) on the
skokomish, nooksack, stillaguamish, and skagit that flood watches
will continue through midday Thursday for snohomish, skagit,
whatcom and mason counties.

Lowland locations from about seattle southward may see urban and
small stream flooding due to the combination of high rain rates
and drainage issues due to leaves clogging drains. The greatest
risk of urban and small stream flooding will be until 9 pm this
evening.

Rivers will recede later Thursday through Friday night as snow
levels drop to 3000-3500 feet and precipitation becomes more
showery.

Hydrologically significant precipitation appears increasingly
likely Saturday through Sunday across the southern half of the
forecast area (especially from a stevens pass-everett-southern
olympics line southward). Many rivers may reach flood stage if
precipitation develops as expected. At this time it appears that
any flooding that occurs will be minor.

Conditions will dry out starting later Sunday or Monday of next
week allowing all rivers to recede. Albrecht

Sew watches warnings advisories
Wa... Wind advisory until 11 pm pdt this evening for bellevue and
vicinity-bremerton and vicinity-hood canal area-seattle and
vicinity-southwest interior-tacoma area.

Flood watch through Thursday morning snohomish, skagit,
whatcom and mason counties.

High wind warning until 9 pm pdt this evening for admiralty
inlet area-central coast-everett and vicinity-north coast-
san juan county-western skagit county-western whatcom
county.

High surf advisory from 11 am Thursday to 6 am pdt Friday for
central coast-north coast.

Pz... Small craft advisory for rough bar until 5 pm pdt Friday for
grays harbor bar.

Small craft advisory from 9 pm this evening to 11 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.

Gale warning until 9 pm pdt this evening 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-puget sound and hood canal.

Small craft advisory from 6 pm this evening to 5 am pdt Thursday
for admiralty inlet-east entrance u.S. Waters strait of
juan de fuca-northern inland waters including the san juan
islands.

Gale warning until 6 pm pdt this evening for admiralty inlet-
east entrance u.S. Waters strait of juan de fuca-northern
inland waters including the san juan islands.

Small craft advisory until 6 am pdt Thursday for west entrance
u.S. Waters strait of juan de fuca.

Small craft advisory until 5 pm pdt this afternoon for central
u.S. Waters strait of juan de fuca.

Small craft advisory from 9 pm this evening to 6 am pdt Thursday
for puget sound and hood canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 1 mi45 min 65°F 55°F1003.9 hPa
TCMW1 - 9446482 - Tacoma Met, WA 1 mi39 min SSW 17 G 25
EBSW1 - 9447130 - Seattle, WA 23 mi39 min S 13 G 20 63°F 54°F1002.9 hPa
WPOW1 - West Point, WA 27 mi57 min S 31 G 37 59°F 1002.1 hPa (-3.5)54°F
46120 34 mi32 min W 25 60°F 1000.9 hPa54°F

Wind History for Tacoma MET, WA
(wind in knots)    EDIT      (on/off)   Help
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SW10
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tacoma, Tacoma Narrows Airport, WA8 mi64 minS 23 G 3410.00 miOvercast and Windy60°F54°F80%1003.9 hPa
Tacoma / McChord Air Force Base, WA8 mi59 minS 24 G 3310.00 miMostly Cloudy and Windy63°F57°F80%1004.1 hPa
Seattle, Seattle-Tacoma International Airport, WA13 mi64 minS 18 G 3210.00 miOvercast and Breezy62°F54°F75%1003.5 hPa
Pierce County-Thun Field, WA14 mi62 minS 12 G 2310.00 miMostly Cloudy64°F53°F68%1004.4 hPa
Fort Lewis / Gray U. S. Army Airfield, WA15 mi2 hrsSSE 20 G 3210.00 miLight Rain and Breezy61°F60°F96%1005.1 hPa
Boeing Field - King County International Airport, WA19 mi64 minS 17 G 3110.00 miOvercast64°F54°F70%1002.9 hPa
Renton Municipal Airport, WA19 mi64 minS 15 G 2810.00 miLight Rain65°F55°F73%1003.2 hPa
Bremerton, Bremerton National Airport, WA23 mi61 minSSW 21 G 294.00 miLight Rain Fog/Mist and Breezy56°F55°F97%1004.7 hPa

Wind History from TIW (wind in knots)
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Last 24hrS8
G17
SW8SW3SW6S5S7S7CalmCalmCalmE3SE4S4S3CalmCalmSE4SE5S7S11S16
G22
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1 day agoSW9SW7W6SW7SW8S7S4E33S3S5S8S8S11
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2 days agoNE3NE3N4NE5N4CalmCalmCalmCalmCalmSE3NW4S3N3SE6CalmS3S7S8S10S9SW8
G19
W6SW9

Tide / Current Tables for Tacoma, Commencement Bay, Washington
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Tacoma
Click for Map
Wed -- 04:56 AM PDT     10.63 feet High Tide
Wed -- 06:09 AM PDT     Moonrise
Wed -- 07:33 AM PDT     Sunrise
Wed -- 10:46 AM PDT     2.68 feet Low Tide
Wed -- 04:58 PM PDT     11.87 feet High Tide
Wed -- 06:15 PM PDT     Moonset
Wed -- 06:15 PM PDT     Sunset
Wed -- 11:22 PM PDT     1.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.94.66.88.810.210.610.18.66.54.432.73.55.37.69.811.411.911.39.77.34.62.41.3

Tide / Current Tables for Discovery Island, 3.3 miles NE of, Washington Current
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Discovery Island
Click for Map
Wed -- 12:52 AM PDT     0.00 knots Slack
Wed -- 03:19 AM PDT     1.58 knots Max Flood
Wed -- 05:57 AM PDT     -0.00 knots Slack
Wed -- 06:09 AM PDT     Moonrise
Wed -- 07:33 AM PDT     Sunrise
Wed -- 09:18 AM PDT     -1.62 knots Max Ebb
Wed -- 12:56 PM PDT     0.00 knots Slack
Wed -- 03:24 PM PDT     1.56 knots Max Flood
Wed -- 05:57 PM PDT     -0.01 knots Slack
Wed -- 06:15 PM PDT     Moonset
Wed -- 06:16 PM PDT     Sunset
Wed -- 09:36 PM PDT     -2.02 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.60.11.11.51.50.9-0-0.7-1.3-1.6-1.5-1.2-0.60.111.51.50.9-0-0.8-1.5-1.9-2-1.7

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 (19,4,5,8)
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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.