Tuesday, January22, 2019 L-36.com


Marine Weather and Tides
SeaTac, WA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:44AMSunset 4:56PM Tuesday January 22, 2019 4:37 AM PST (12:37 UTC) Moonrise 7:09PMMoonset 9:00AM Illumination 97% Phase: Waning Gibbous; Moon at 16 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- 215 Am Pst Tue Jan 22 2019
.small craft advisory in effect through late tonight...
Today..S wind 15 to 25 kt rising to 20 to 30 kt in the afternoon. Wind waves 3 to 5 ft. Rain likely in the morning then rain in the afternoon.
Tonight..S wind 20 to 30 kt. Wind waves 3 to 5 ft. Rain likely.
Wed..SW wind 20 to 30 kt becoming nw 10 to 20 kt in the afternoon. Wind waves 3 to 5 ft subsiding to 1 to 3 ft in the afternoon. A chance of rain.
Wed night..Light wind becoming se to 10 kt after midnight. Wind waves 1 ft or less.
Thu..S wind to 10 kt. Wind waves 1 ft or less.
Thu night..Light wind. Wind waves less than 1 ft.
Fri..Light wind. Wind waves 1 ft or less.
Sat..N wind to 10 kt. Wind waves 1 ft or less.
PZZ100 215 Am Pst Tue Jan 22 2019
Synopsis for the northern and central washington coastal and inland waters..A frontal system will move inland this afternoon and will be followed by a weakening low that will move through the northern waters tonight. Weak high pressure will move over the area on Thursday and remain over the area through Saturday.


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


Area Discussion for - Seattle, WA
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Fxus66 ksew 221044
afdsew
area forecast discussion
national weather service seattle wa
245 am pst Tue jan 22 2019

Synopsis A pair of frontal systems will bring rain to the
lowlands, snow to the mountains, and breezy to windy conditions
today into Wednesday. A ridge of high pressure aloft will build over
the offshore waters Wednesday night and continue into the weekend
for generally dry conditions. A couple of weak weather systems may
clip the northern part of the region Thursday night and again Sunday
for a chance of showers.

Short term A warm front is lifting north through the
offshore waters this morning with rain spreading onto the coast. The
rain will reach the puget sound area around daybreak. Rainfall looks
initially light across the area with the warm front, but will
intensify later this evening and tonight as the associated surface
trough and cold front approach the coast. Models give a fairly
significant (but short-lived) shot of QPF between 00z and 06z this
evening. While the snow levels will be rising tonight, much of this
qpf could amount to some substantial snowfall at places like mount
baker and stevens pass before the snow level takes a jump late
tonight. With this in mind, will be going with a winter storm
warning for the cascades from whatcom county southward through king
county effective through late this evening and a winter weather
advisory for the cascades in pierce and lewis counties. In addition
to the precip, it be come windy along the coast this afternoon and
tonight and breezy to locally windy over the interior.

A cold front will push into the cascades early Wednesday morning
with precipitation gradually diminishing from the west through the
day. An upper ridge will begin to the build over the offshore waters
Wednesday night for what should be a generally dry period from
Thursday into the weekend. Models do have a weak system clipping the
northern part of the forecast area Thursday night so a chance of
rain was added to the forecast from the puget sound northward.

Temperatures through the short term period will be near to a little
above average. 27

Long term The upper ridge offshore gains some amplitude Friday
and the axis shifts eastward over western washington on Saturday.

Looks like a pleasant start to the weekend with some sunshine after
areas of morning fog and daytime temperatures a little above
average. The GFS and euro are in general agreement with retrograding
the upper ridge offshore late in the weekend and allowing another
system to clip the area from the northwest on Sunday. At this point,
it looks like nothing more than a low chance of showers for the
northern cascades and remaining dry for the rest of the region. The
ridge then reasserts itself on Monday for more dry weather. 27

Aviation A warm front will spread rain to western washington
today with mainlyVFR conditions expected. MVFR conditions are
likely tonight as the cold front moves S SE through the region.

Rain will be moderate to heavy at times along the coast. The flow
aloft is westerly. Expect windy conditions tonight with S winds
gusting to 20-30kt. Showers will mainly impact the cascades
Wednesday morning as this system exits. 33
ksea... Mainly light rain at the terminal today then rain increasing
tonight with a cold front. South winds 10-20kt with gusts to 30kt
tonight, along with MVFR cigs. 33

Marine A frontal system will move through the waters late this
afternoon through this evening. This front will be followed by a
1007 mb low west of the northern tip of vancouver island that will
fill to around 1016 mb as it moves across the northern waters late
tonight into Wednesday morning. Gale warnings continue today for the
coastal waters, the east entrance to the strait, admiralty inlet,
and the northern inland waters. Small craft advisories are in effect
for the remaining waters. Small craft advisory conditions will
continue over all of the waters tonight with conditions gradually
improving on Wednesday.

High pressure over the waters Thursday through Saturday will give
generally light winds to the area.

Minor coastal flooding remains likely along the pacific coastline in
grays harbor county around the high tide early Tuesday afternoon.

The astronomical high tide is expected to be within 0.25 feet of hat
-the point where minor flooding begins- and tidal anomalies are
expected to be just large enough to result in some minor flooding
around the time of high tide there. A coastal flood advisory is in
effect for the shoreline of grays harbor county.

Extratropical storm surge guidance suggests that the inland waters
could see some minor tidal overflow around the morning high tide on
Wednesday. However, conditions are marginal enough that advisories
will be issued this afternoon if later solutions continue to show
the tides exceeding hat. Albrecht

Hydrology The skokomish river in mason county will rise tonight
due to a period of heavy rain in the olympics. This system will
push through relatively quick but may still see 2-3 inches of
rainfall in the basin, pushing the skokomish river to around 16
feet (a half foot below minor flood stage). The river will recede
on Wednesday.

Otherwise, no river flooding concerns over the next 7 days. 33

Sew watches warnings advisories
Wa... Winter weather advisory from 7 am this morning to midnight pst
tonight for cascades of pierce and lewis counties.

Winter storm warning from 7 am this morning to midnight pst
tonight for cascades of snohomish and king counties-
cascades of whatcom and skagit counties.

Coastal flood advisory from noon today to 4 pm pst this
afternoon for central coast.

Pz... Gale warning until 2 pm pst this afternoon 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 from noon today to 9 pm pst
Wednesday for grays harbor bar.

Gale warning until 4 pm pst this afternoon 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 4 am pst Wednesday for puget sound
and hood canal-west 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 12 mi56 min ESE 5.1 G 6
TCNW1 - 9446484 - Tacoma, WA 13 mi56 min 41°F 50°F1030.3 hPa
WPOW1 - West Point, WA 19 mi38 min SSE 14 G 17 43°F 1028.5 hPa (-1.2)35°F
46120 24 mi44 min NE 9.7 46°F 1027.4 hPa37°F
46125 38 mi46 min 18 44°F 1026.5 hPa39°F

Wind History for Tacoma MET, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle-Tacoma International Airport, WA2 mi45 minSE 1010.00 miOvercast42°F32°F68%1029.8 hPa
Renton Municipal Airport, WA6 mi45 minSSE 510.00 miOvercast40°F33°F77%1030 hPa
Boeing Field - King County International Airport, WA8 mi45 minSSE 810.00 miOvercast40°F33°F77%1029.3 hPa
Tacoma, Tacoma Narrows Airport, WA19 mi45 minSE 610.00 miOvercast42°F37°F82%1029.7 hPa
Tacoma / McChord Air Force Base, WA21 mi1.7 hrsS 510.00 miOvercast39°F39°F99%1030.4 hPa
Pierce County-Thun Field, WA22 mi63 minN 010.00 miOvercast41°F35°F81%1029.5 hPa

Wind History from SEA (wind in knots)
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Last 24hrCalmSE7SE5S4S5SE33SE5CalmCalmW3CalmS3S4SE55SE10SE7S5SE8SE9SE9SE9SE10
1 day agoN9N10N9N7N7N9N5N4NE5N13N11N13N5N7N5N5NE4N4N3CalmCalmCalmS4S3
2 days agoSW12SW11S8S11S10S12S10S12SW15
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SW8S9SW11S11S11SW10S7SE9SE8SE6SE5N8NE3N4N5

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Tue -- 06:31 AM PST     13.70 feet High Tide
Tue -- 07:46 AM PST     Sunrise
Tue -- 08:59 AM PST     Moonset
Tue -- 12:01 PM PST     6.57 feet Low Tide
Tue -- 04:54 PM PST     11.69 feet High Tide
Tue -- 04:55 PM PST     Sunset
Tue -- 07:09 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-2.5-0.42.86.49.812.313.513.612.510.88.77.26.67.18.49.911.211.7119.26.63.50.5-1.7

Tide / Current Tables for Skagit Bay, 1 mile N of Rocky Point, Washington Current
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Skagit Bay
Click for Map
Tue -- 04:09 AM PST     1.41 knots Max Flood
Tue -- 06:40 AM PST     -0.00 knots Slack
Tue -- 07:47 AM PST     Sunrise
Tue -- 09:00 AM PST     Moonset
Tue -- 11:26 AM PST     -1.06 knots Max Ebb
Tue -- 01:05 PM PST     0.00 knots Slack
Tue -- 04:03 PM PST     0.46 knots Max Flood
Tue -- 04:55 PM PST     Sunset
Tue -- 05:05 PM PST     -0.00 knots Slack
Tue -- 07:10 PM PST     Moonrise
Tue -- 10:58 PM PST     -1.60 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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00.511.31.41.20.6-0.1-0.5-0.8-1-1.1-0.9-0.10.20.40.50.1-0.3-0.7-1-1.3-1.5-1.6

Weather Map and Satellite Images
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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 (7,2,3,4)
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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.