Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Federal Way, WA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:10AMSunset 8:14PM Tuesday August 20, 2019 8:16 PM PDT (03:16 UTC) Moonrise 9:44PMMoonset 10:14AM Illumination 70% Phase: Waning Gibbous; Moon at 20 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- 302 Pm Pdt Tue Aug 20 2019
.small craft advisory in effect from midnight pdt tonight through Wednesday morning...
Tonight..SW wind 5 to 15 kt becoming S 15 to 25 kt after midnight. Wind waves 2 ft or less building to 2 to 4 ft after midnight. A slight chance of showers after midnight.
Wed..S wind 15 to 25 kt easing to 10 to 20 kt in the afternoon. Wind waves 2 to 4 ft. Showers.
Wed night..S wind 5 to 15 kt. Wind waves 2 ft or less. Showers likely in the evening then a chance of showers after midnight.
Thu..SW wind to 10 kt becoming N in the afternoon. Wind waves 1 ft or less.
Thu night..N wind 5 to 15 kt becoming ne after midnight. Wind waves 2 ft or less.
Fri..N wind 5 to 15 kt becoming ne in the afternoon. Wind waves 2 ft or less.
Fri night..N wind 5 to 15 kt becoming variable to 10 kt after midnight. Wind waves 2 ft or less.
Sat..S wind to 10 kt becoming n. Wind waves 2 ft or less.
Sun..S wind to 10 kt becoming n. Wind waves 1 ft or less.
PZZ100 302 Pm Pdt Tue Aug 20 2019
Synopsis for the northern and central washington coastal and inland waters..Southerly flow most waters, except westerlies in the strait through tonight. A cold front will cross the area tonight and Wednesday. Onshore flow will persist through the rest of the week. A much weaker front will pass to the north later Friday and Saturday.


7 Day Forecast for Marine Location Near Federal Way, WA
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location: 47.33, -122.34     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 202214
afdsew
area forecast discussion
national weather service seattle wa
314 pm pdt Tue aug 20 2019

Synopsis An upper level ridge over the pacific northwest will
slide east through this afternoon as a front approaches the area.

The front will spread rain across western washington tonight
through Wednesday. Dry weather by Thursday afternoon with a weak
high pressure over the area. A series of systems will pass
generally to our north Friday into the weekend keeping
temperatures near normal and bringing a chance of showers mainly
to the coast and northern areas.

Short term tonight through Friday Satellite imagery shows
high clouds over western washington this afternoon ahead of the
next frontal system. Dry weather through this evening as the upper
level ridge slides east. Temperatures generally in the 70s to low
80s currently with a few mid 80s by this afternoon.

A fairly potent weather system near 45n 132w will move northeast
and track into the central b.C. Coast tonight. The front will
slide onshore a bit quicker than expected with showers chances
along the coast tonight pushing eastward into the puget sound area
by daybreak. Models still fluctuate on QPF amounts, but most
generally in the range of a quarter of an inch to possibly a half
inch in spots around the sound with around an inch along the
coast. The front will move quickly through western washington and
weaken over the cascades by evening. Mesoscale models highlight
the possibility for the development of a convergence zone over
snohomish king counties Wednesday night into early Thursday
morning. Drier weather expected with some sunshine by Thursday
afternoon as a weak area of high pressure builds over the area.

Temperatures will be cooler on Wednesday with highs in the 60s
with temperatures into the mid 70s on Thursday.

The upper level ridge over the area Thursday will become flattened
by Friday with the approach of another upper level trough.

Although the bulk of the energy with this system will generally be
north of the area, there will be a few showers possible across the
northern tier on Friday. Temperatures on Friday will be in the mid
60s to mid 70s across the area. Jd

Long term Saturday through Tuesday Another weather system
north of the area looks to bring a chance for pops on Saturday
with the GFS being a bit drier than the ecmwf. Onshore flow
expected through the weekend with temperatures near normal.

Guidance does suggest high pressure aloft building into the area
on Monday. Pattern change is possible heading into the middle of
next week if the current trends are maintained with higher
amplitude ridging over the pacific northeast and warmer
temperatures. Jd

Aviation An approaching frontal system has brought fairly
widespread mid and high level clouds this afternoon. Expect
increasing low level southerly flow most areas ahead of the front
late tonight. The front will reach the coast after midnight with
low clouds and rain spreading inland through the morning. Conditions
will remainVFR overnight with ceilings lowering to MVFR levels
along the coast after 06z followed by much of the interior 14-16z.

Ifr conditions are possible Wednesday morning at some locations as
rain moves onshore and inland.

Ksea... Mid and high level clouds withVFR conditions through
tonight. Ceilings will to MVFR levels after daybreak with rain as a
cold front moves into the central puget sound. Southwesterly winds 2
to 6 kt becoming 8 to 10 kt after 06z.

Marine Southerly winds over most waters tonight with weak onshore
flow through the strait. Increasing southerlies ahead of the front
will result in small craft advisory conditions most waters as the
front moves into the area tonight and Wednesday morning. Onshore
flow and westerlies will follow behind the front through the
remainder of the week with periods of small craft conditions
possible in the central and eastern strait. A weak front will brush
the area later Friday and Saturday with minimal affect on the
winds.

Hydrology The daily hydrology discussion has ended until the
start of the next rainy season; it will only be updated as needed
until then.

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory until 11 am pdt Wednesday 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 from 11 pm this evening to 5 pm pdt
Wednesday for admiralty inlet-northern inland waters
including the san juan islands.

Small craft advisory from 6 pm this evening to 4 am pdt
Wednesday for central u.S. Waters strait of juan de fuca.

Small craft advisory from midnight tonight to 10 am pdt
Wednesday for puget sound and hood canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCMW1 - 9446482 - Tacoma Met, WA 6 mi53 min W 14 G 19
TCNW1 - 9446484 - Tacoma, WA 6 mi53 min 74°F 56°F1013.8 hPa
46121 21 mi34 min 68°F 1013.5 hPa57°F
WPOW1 - West Point, WA 23 mi77 min SSE 7 G 8 71°F 1012.1 hPa (+0.0)57°F
46120 30 mi33 min S 3.9 69°F 1011 hPa58°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, WA8 mi24 minSW 1110.00 miMostly Cloudy72°F55°F57%1014.2 hPa
Renton Municipal Airport, WA13 mi24 minSW 910.00 miFair76°F57°F54%1013.2 hPa
Tacoma, Tacoma Narrows Airport, WA13 mi24 minW 8 G 1710.00 miFair66°F55°F68%1013.8 hPa
Boeing Field - King County International Airport, WA14 mi24 minSSW 810.00 miMostly Cloudy75°F55°F52%1013 hPa
Tacoma / McChord Air Force Base, WA14 mi2.3 hrsWNW 710.00 miFair80°F64°F60%1012.8 hPa
Pierce County-Thun Field, WA16 mi22 minN 010.00 miFair70°F59°F69%1014.6 hPa
Fort Lewis / Gray U. S. Army Airfield, WA21 mi79 minW 810.00 miFair72°F62°F72%1013.5 hPa

Link to 5 minute data for KSEA

Wind History from SEA (wind in knots)
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Last 24hrN7N7N6N8N5N5N5N4N4NE63CalmCalm3S5S6SW11SW65S66SW5SW6SW11
1 day agoW4CalmNE6CalmN4SW3SW4SW3SW4SW4SE6SE6SE6SE3W5SW5SW94W75W8NW7N7N6
2 days agoSW6SW7SW7SW5S5S5S4SW3SW4SW3CalmCalmSW33SW5533W5SW8S6W5SW8W5

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Tue -- 02:58 AM PDT     3.47 feet Low Tide
Tue -- 06:12 AM PDT     Sunrise
Tue -- 08:37 AM PDT     9.19 feet High Tide
Tue -- 11:14 AM PDT     Moonset
Tue -- 02:45 PM PDT     2.60 feet Low Tide
Tue -- 08:12 PM PDT     Sunset
Tue -- 09:09 PM PDT     11.12 feet High Tide
Tue -- 10:42 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.35.443.545.26.78.199.18.57.25.642.92.63.457.1910.511.110.89.7

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Tue -- 12:21 AM PDT     0.05 knots Slack
Tue -- 02:57 AM PDT     1.59 knots Max Flood
Tue -- 06:12 AM PDT     Sunrise
Tue -- 06:25 AM PDT     -0.05 knots Slack
Tue -- 09:29 AM PDT     -1.34 knots Max Ebb
Tue -- 11:14 AM PDT     Moonset
Tue -- 12:09 PM PDT     0.01 knots Slack
Tue -- 03:12 PM PDT     1.69 knots Max Flood
Tue -- 06:44 PM PDT     -0.05 knots Slack
Tue -- 08:12 PM PDT     Sunset
Tue -- 09:54 PM PDT     -1.39 knots Max Ebb
Tue -- 10:43 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.60.91.41.61.51.10.5-0.7-1.1-1.3-1.3-1-0.40.91.41.71.61.30.8-0.6-1-1.3-1.4-1.2

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (23,6,7,8)
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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.