Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Rosedale, WA

Version 3.4
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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 6:13AMSunset 8:13PM Wednesday August 21, 2019 12:51 PM PDT (19:51 UTC) Moonrise 10:08PMMoonset 11:19AM Illumination 63% Phase: Waning Gibbous; Moon at 21 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- 849 Am Pdt Wed Aug 21 2019
Today..S wind 10 to 20 kt. Wind waves 1 to 3 ft. Rain likely in the morning then rain in the afternoon.
Tonight..S wind 5 to 15 kt becoming se after midnight. Wind waves 2 ft or less. A chance of showers.
Thu..Light wind becoming N to 10 kt in the afternoon. Wind waves 1 ft or less.
Thu night..N wind to 10 kt becoming ne after midnight. Wind waves 1 ft or less.
Fri..N wind to 10 kt. Wind waves 1 ft or less.
Fri night..N wind to 10 kt becoming variable after midnight. Wind waves 1 ft or less.
Sat..S wind to 10 kt becoming n. Wind waves 1 ft or less.
Sun..SE wind to 10 kt becoming n. Wind waves 1 ft or less.
PZZ100 849 Am Pdt Wed Aug 21 2019
Synopsis for the northern and central washington coastal and inland waters..A weakening front will move through the area today. Onshore flow will develop behind the front tonight and continue through the weekend. A weaker frontal system will approach the area on Friday and dissipate over the area on Saturday.


7 Day Forecast for Marine Location Near Rosedale, WA
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location: 47.37, -122.64     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 211536
afdsew
area forecast discussion
national weather service seattle wa
836 am pdt Wed aug 21 2019

Synopsis A cold front will bring rain to the region today. Dry
weather by Thursday afternoon with weak high pressure over the
area. A series of systems will pass generally to our north Friday
into the weekend with temperatures near normal and bringing a
chance of showers mainly to the coast and northern areas. Warmer
and drier conditions are expected to develop early next week.

Short term today through Friday Light rain across western
washington this morning as the frontal systems slides through the
area. Amounts so far generally around a half an inch along the
coast with around a trace to two tenths of an inch in the puget
sound area. Expect showers around through the afternoon as the
front slides east of the area. Mesoscale models develop a
convergence zone behind the front later this evening through
tonight across king snohomish counties. Temperatures this
afternoon will be cooler with highs in the 60s across the area.

Drier weather expected into Thursday morning as an upper level
ridge begins to build back into the pacific northwest. Some
sunshine Thursday afternoon with temperatures in the mid 60s to
mid 70s. The upper level ridge will flatten by Friday as the next
system passes by to the north of the area. Slight chance for a few
showers across the northern tier of western washington with most
dry throughout Friday. Mix of Sun and clouds on Friday with
temperatures in the upper 60s to mid 70s across the area. Jd

Long term Saturday through Tuesday Another system moves to
the north on Saturday. While still rather weak, heights will fall
further and there will be a chance of showers for the coast and
the interior from seattle northward. Partly to mostly cloudy
conditions are expected with temperatures a little below normal.

Sunday looks much the same as the last in the series of upper
level disturbances passes through british columbia.

And this is where things begin to change. For much of the past
few weeks, the longwave pattern has favored upper level troughing
to our west and a broad ridge over the interior west. As the
trough over british columbia pushes eastward early next week, it
is expected to carve out a decent trough over the northern plains
states. In response to this, a fairly high amplitude ridge is
expected to develop over the pacific northwest with 500mb heights
well into the 580s Tuesday and beyond. In addition, a thermal
trough may develop along the coast with low level flow turning
offshore. The models have been hinting at this for a couple days
now. It is still several days out, but we may be looking at at
least a few very warm days to close out the month of august.

Summer isn't over yet... Meteorological or astronomical. 27

Aviation An upper level trough will push across the area thru
tomorrow morning with an accompanying cold front at the sfc. A
rather extensive rain shield will continue along and ahead of the
cold front. Ceilings ahead of the rain shield areVFR, with ceilings
dropping to MVFR some embedded ifr possible within the rain
shield. Once ceilings lower to MVFR, expect this category to largely
rule through Thursday morning. Widespread rain should taper into the
evening hours with a puget sound convergence zone likely to develop
this evening in the central north sound vicinity into snohomish and
king counties. This zone will have the greatest affect on terminals
in this general area into Thursday morning. Southerly wind ahead of
the front will be stronger from pae to bli thru the afternoon at 10-
15kts, with post frontal winds from the NW along the coast at 10-
15kts. Elsewhere, generally S SW at 5-10kts.

Ksea...VFR ceilings likely to give way to MVFR brief potential for
ifr conditions by mid-morning with MVFR likely to hold through
Thursday morning. After widespread rain shield begins to pull east
towards the cascades this evening, a pscz will likely develop and
continue into the early morning hours of Thursday. Winds S SW 5-
10kts.

Kovacik

Marine A robust closed area of low pressure will weaken as it
moves into bc thru the day today. With it, a cold front will push
east across the pacific northwest continuing to bring widespread
rainfall to most waters through the evening hours. Winds ahead of
the front currently located roughly across the outer coastal waters
at 15z will be southerly, with breeziest conditions found roughly
from admiralty inlet north thru the eastern strait and into the
northern inland waters, as well as the offshore waters. These
conditions will largely dominate into Thursday morning, with then
some enhanced NW winds moving in behind the front. Headlines are in
place for the offshore waters and thru the central and eastern
strait to account for this. A 10ft+ swell will likely accompany the
nw winds across the outer coastal waters but current SCA will cover
this concern along with the winds. The remainder of this forecast
discussion has been left as is:
an onshore flow pattern will continue Friday and into the weekend
with the usual diurnal small craft advisory strength west winds in
the strait each evening. A weak frontal system will approach the
area on Friday and then dissipate over the area on Saturday. The
main impact will be to turn the winds a bit more southerly but
speeds should remain sub-advisory strength.

Kovacik schneider

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 Thursday for coastal waters
from CAPE flattery to james island 10 to 60 nm-coastal
waters from james island to point grenville 10 to 60 nm-
coastal waters from point grenville to CAPE shoalwater 10
to 60 nm-northern inland waters including the san juan
islands.

Small craft advisory until 11 am pdt this morning for coastal
waters from CAPE flattery to james island out 10 nm-coastal
waters from james island to point grenville out 10 nm-
coastal waters from point grenville to CAPE shoalwater out
10 nm.

Small craft advisory until 5 am pdt Thursday for east entrance
u.S. Waters strait of juan de fuca.

Small craft advisory from 5 pm this afternoon to 5 am pdt
Thursday for central u.S. Waters strait of juan de fuca.

Small craft advisory until noon pdt today for admiralty inlet.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46121 8 mi36 min 62°F 1015.5 hPa60°F
TCMW1 - 9446482 - Tacoma Met, WA 13 mi58 min NNW 5.1 G 6
TCNW1 - 9446484 - Tacoma, WA 14 mi58 min 64°F 56°F1015.7 hPa
WPOW1 - West Point, WA 23 mi52 min SSE 8 G 8.9 61°F 1015.3 hPa (-0.7)59°F
46120 30 mi40 min 61°F 1014.3 hPa57°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 mi2 hrsW 510.00 miOvercast60°F59°F96%1015.8 hPa
Bremerton, Bremerton National Airport, WA10 mi1.9 hrsSSW 109.00 miLight Rain61°F59°F93%1017.2 hPa
Tacoma / McChord Air Force Base, WA17 mi1.9 hrsN 010.00 miMostly Cloudy64°F59°F83%1015.6 hPa
Seattle, Seattle-Tacoma International Airport, WA18 mi2 hrsWSW 310.00 miOvercast64°F59°F84%1016 hPa
Fort Lewis / Gray U. S. Army Airfield, WA20 mi1.9 hrsWSW 410.00 miOvercast63°F63°F100%1015.9 hPa
Boeing Field - King County International Airport, WA21 mi2 hrsSSW 410.00 miLight Rain66°F60°F81%1015.2 hPa
Renton Municipal Airport, WA24 mi2 hrsN 09.00 miOvercast66°F61°F84%1015.5 hPa

Link to 5 minute data for KTIW

Wind History from TIW (wind in knots)
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Last 24hrW4----NW6W65W6--------------S3S3S4----SW4CalmCalmW5W3
1 day ago--NW7W6W53NE6NE6----------N3N6CalmCalmCalmCalmCalmCalmCalmS4SW4S6
2 days ago55W7W6W7W6W5SW4CalmSW3--SW4----W3S5S3S4S4S3S3SW4--SE6

Tide / Current Tables for Wauna, Washington
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Wauna
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Wed -- 04:17 AM PDT     2.85 feet Low Tide
Wed -- 06:14 AM PDT     Sunrise
Wed -- 10:02 AM PDT     10.01 feet High Tide
Wed -- 12:19 PM PDT     Moonset
Wed -- 04:03 PM PDT     3.68 feet Low Tide
Wed -- 08:11 PM PDT     Sunset
Wed -- 10:06 PM PDT     12.23 feet High Tide
Wed -- 11:07 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.97.85.63.82.93.24.56.38.19.5109.68.67.15.54.23.74.25.87.99.911.512.211.8

Tide / Current Tables for West Point, Whidbey Island, 1.8 miles SW of, Washington Current
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West Point
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Wed -- 05:42 AM PDT     0.00 knots Slack
Wed -- 06:14 AM PDT     Sunrise
Wed -- 08:08 AM PDT     0.45 knots Max Flood
Wed -- 09:24 AM PDT     -0.00 knots Slack
Wed -- 10:41 AM PDT     -0.57 knots Max Ebb
Wed -- 12:19 PM PDT     Moonset
Wed -- 04:36 PM PDT     0.00 knots Slack
Wed -- 08:11 PM PDT     Sunset
Wed -- 08:12 PM PDT     0.72 knots Max Flood
Wed -- 09:42 PM PDT     -0.00 knots Slack
Wed -- 11:07 PM PDT     Moonrise
Wed -- 11:50 PM PDT     -0.95 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.9-0.8-0.7-0.5-0.3-0.10.10.30.40.2-0.4-0.6-0.6-0.5-0.4-0.2-0.10.10.30.60.70.5-0.2-0.8

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 (15,3,4,5)
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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.