Saturday, September23, 2017 L-36.com


Marine Weather and Tides
SeaTac, 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 6:57AMSunset 7:04PM Saturday September 23, 2017 5:46 AM PDT (12:46 UTC) Moonrise 9:33AMMoonset 8:08PM Illumination 8% 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
    EDIT      (on/off)   Help
PZZ135 Puget Sound And Hood Canal- 246 Am Pdt Sat Sep 23 2017
Today..SW wind to 10 kt. Wind waves 1 ft or less. Patchy fog in the morning.
Tonight..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less. Patchy fog after midnight.
Sun..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less. Patchy fog in the morning.
Sun night..N wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Mon..Light wind becoming S to 10 kt in the afternoon. Wind waves 1 ft or less.
Mon night..S wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Tue..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
Wed..N wind to 10 kt. Wind waves 1 ft or less.
PZZ100 246 Am Pdt Sat Sep 23 2017
Synopsis for the northern and central washington coastal and inland waters..Surface high pressure will dominate the northeast pacific and western washington waters through the weekend. A warm front will cross the coastal waters on Monday. Northerly flow develops Tuesday and becomes offshore on Wednesday as thermally induced low pressure develops northward along the washington coast.

7 Day Forecast for Marine Location Near SeaTac, WA
   Hourly   EDIT   Help
location: 47.42, -122.28     debug


Area Discussion for - Seattle, WA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 ksew 231014
afdsew
area forecast discussion
national weather service seattle wa
315 am pdt Sat sep 23 2017

Synopsis A weak north to south moving weather system will brush
the coast today with clouds and a threat of light rain for the coast
and olympics. Another weak system Sunday night and Monday moving
into british columbia should bring more clouds and a chance of light
rain to mainly northern portions of the area. Higher pressure aloft
is expected to build offshore Tuesday into mid week for a return to
sunshine and warmer temperatures.

Short term Current radar shows some showers along the coast this
early morning... Along with a little blob of showers passing over the
san juans at the time of this writing. Models have been pretty
consistent in keeping this activity west of puget sound and aside
for the minor deviation that is the aforementioned blob over the san
juans... Would expect activity today to be limited to the coast and
the olympics. Current satellite reveals nothing in the way of
surprises as the area is pretty socked in with clouds.

Feels weird to say that this is all associated with a slow moving
upper level ridge nudging its way into the area... But there it
is... A dirty ridge if there ever was one. Enough moisture looks to
be over the area for a generally cloudy weekend... Although some
breaks of Sun look to emerge this afternoon east of the sound.

Sunday will see a return of widespread clouds as an embedded
shortwave within the ridge looks to move through the area on
Monday... Bringing with it a returning chance of showers for most of
the area.

But a ridge is still a ridge... Which means the steady warming trend
that models have been advertising the past several runs looks to
remain on track. Widespread highs in the 60s today... With some
locations possibly hitting 70... Will continue to gradually increase
a degree or two for Sunday. The aforementioned shortwave looks to
knock temps down slightly for Monday... But even then high temps in
the mid 60s will be pretty widespread. Although this is slightly
below normal... All in all a pretty cozy start to fall. Smr

Long term It is pretty safe to say that Tuesday is where the
ridge gets its groove back and sheds the dirty moniker. While clouds
will gradually erode throughout the day... The standout will be the
high temperatures as they rise once more to around the 70 mark for
many locations. With clear skies holding court over W wa for the
remainder of the work week... Conditions will continue to warm with
temps peaking on Thursday as many locations find themselves in the
upper 70s. The ridge exits soon afterward and W wa as models start
to coalesce on a solution for Friday and into the weekend of an
upper level trough starting to enter the area. This will bring temps
back down to around 70 in most spots. Models still disagree with
whether or not this will result in precip though... As the GFS proves
the wetter solution bringing precip area-wide while the ECMWF limits
any pops to the northernmost portions of the area. Leaning toward
ecmwf solution at this time. Smr

Aviation Western wa lies in between a trough over the
intermountain west and a ridge offshore. The flow aloft is
northerly. The air mass is dry and stable with mainly mid-high
level clouds over the region. Patchy fog or low clouds may form
early this morning, mainly in the valleys and along the coast.

Light rain is possible along the coast where there is weak warm
air advection. The interior will remain dry. The ridge will shift
inland tonight for dry conditions. 33
ksea... Patchy low clouds or stratus may form early this morning
for brief MVFR conditions. Otherwise, light south winds andVFR
with dry conditions. Surface winds will flip to light northerly
03-06z tonight. 33

Marine High pressure over the NE pacific will maintain light
onshore flow this weekend. A warm front will clip the area on
Monday with possible small craft advisory winds over the coastal
waters. The flow will turn offshore by midweek as a thermal trough
forms along the coast. 33

Sew watches warnings advisories
Wa... None.

Pz... None.



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCMW1 - 9446482 - Tacoma Met, WA 12 mi47 min SE 1.9 G 4.1
TCNW1 - 9446484 - Tacoma, WA 13 mi47 min 56°F 56°F1018.2 hPa (+0.4)
EBSW1 - 9447130 - Seattle, WA 13 mi47 min Calm G 1.9 57°F 55°F1017.9 hPa (+0.5)
WPOW1 - West Point, WA 19 mi47 min S 1.9 G 1.9 54°F 1017.9 hPa (+0.5)52°F
46120 24 mi45 min WSW 3.9 55°F 1017 hPa52°F
46121 26 mi46 min 3.9 55°F 1017 hPa51°F

Wind History for Tacoma MET, WA
(wind in knots)    EDIT      (on/off)   Help
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last
24hr
--
E2
SE2
N1
NW3
NW4
W4
W7
W6
NW6
NW3
NW4
NE2
N1
NW2
N1
--
NE2
NW4
W2
SW2
G5
SE1
SE4
SE2
1 day
ago
SE3
S1
E2
--
NW1
NW3
NW5
N3
NW3
NW5
W4
NW5
NW3
NW4
--
NW3
NE1
E2
NW4
E3
E4
SE3
SE2
SE2
2 days
ago
N4
N4
W7
G11
W4
G7
SW6
G10
W2
G6
W2
W9
S2
NW3
N4
N2
N1
N1
E2
SE3
SE1
SE3
SE4
SE3
SE4
SE4
SE3
SE1

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle-Tacoma International Airport, WA2 mi54 minSE 410.00 miOvercast55°F50°F83%1018.4 hPa
Renton Municipal Airport, WA6 mi54 minN 010.00 miMostly Cloudy55°F51°F87%1018.3 hPa
Boeing Field - King County International Airport, WA8 mi54 minSSE 310.00 miOvercast56°F51°F84%1017.7 hPa
Tacoma, Tacoma Narrows Airport, WA19 mi54 minN 010.00 miOvercast53°F51°F93%1017.7 hPa
Tacoma / McChord Air Force Base, WA21 mi49 minN 010.00 miOvercast52°F52°F99%1018.3 hPa
Pierce County-Thun Field, WA22 mi52 minN 010.00 miOvercast52°F50°F94%1017.9 hPa

Wind History from SEA (wind in knots)
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
Last 24hrCalmS4SE6S4Calm3W7W6W8CalmNW7W6S4S4CalmS3S4S3S4S4S5SW5SE4SE4
1 day agoS4S5S4SW4SW5SW6SW5W33Calm3NE3NW3NE6SE3S3CalmSE3SE3SE4SE5CalmSE5SE5
2 days agoCalmCalmW5W4W4W5NW53S8S6SW9SW7S5S3S4SE7S6SE5SE6SE5SE6SE5S5S7

Tide / Current Tables for Des Moines, Washington
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Des Moines
Click for Map
Sat -- 01:35 AM PDT     1.29 feet Low Tide
Sat -- 06:57 AM PDT     Sunrise
Sat -- 07:57 AM PDT     10.69 feet High Tide
Sat -- 10:32 AM PDT     Moonrise
Sat -- 01:48 PM PDT     3.51 feet Low Tide
Sat -- 07:04 PM PDT     Sunset
Sat -- 07:40 PM PDT     10.84 feet High Tide
Sat -- 09:09 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.91.51.42.54.46.78.810.210.710.28.97.15.23.93.54.35.87.79.510.610.8108.46.3

Tide / Current Tables for Skagit Bay, 1 mile N of Rocky Point, Washington Current
   EDIT      (on/off)   Help   One Week of Data
Skagit Bay
Click for Map
Sat -- 12:43 AM PDT     -1.26 knots Max Ebb
Sat -- 02:33 AM PDT     0.00 knots Slack
Sat -- 06:13 AM PDT     0.80 knots Max Flood
Sat -- 06:58 AM PDT     Sunrise
Sat -- 08:08 AM PDT     -0.00 knots Slack
Sat -- 10:33 AM PDT     Moonrise
Sat -- 01:11 PM PDT     -0.96 knots Max Ebb
Sat -- 02:50 PM PDT     0.00 knots Slack
Sat -- 06:14 PM PDT     0.57 knots Max Flood
Sat -- 07:05 PM PDT     Sunset
Sat -- 07:43 PM PDT     -0.00 knots Slack
Sat -- 09:09 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.2-1.2-0.50.20.50.70.80.60.1-0.2-0.5-0.7-0.9-1-0.700.30.50.60.4-0.1-0.4-0.7-0.9

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Seattle, WA (8,2,3,4)
      (on/off)   Help

Ground Weather Radar Station Seattle/Tacoma, WA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.