Tuesday, June25, 2019 L-36.com


Marine Weather and Tides
Des Moines, WA

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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 5:11AMSunset 9:12PM Tuesday June 25, 2019 8:39 PM PDT (03:39 UTC) Moonrise 12:31AMMoonset 12:29PM Illumination 38% Phase: Third Quarter Moon; Moon at 23 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- 243 Pm Pdt Tue Jun 25 2019
Tonight..NW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less. A slight chance of showers.
Wed..S wind to 10 kt becoming sw in the afternoon. Wind waves 1 ft or less. A slight chance of showers in the morning then a chance of showers in the afternoon.
Wed night..NW wind to 10 kt becoming S after midnight. Wind waves 1 ft or less. A chance of showers.
Thu..SW wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..Variable wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Fri..S wind to 10 kt in the morning becoming light. Wind waves 1 ft or less.
Fri night..SW wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Sat..Light wind becoming variable to 10 kt. Wind waves 1 ft or less.
Sun..Light wind becoming N to 10 kt. Wind waves 1 ft or less.
PZZ100 243 Pm Pdt Tue Jun 25 2019
Synopsis for the northern and central washington coastal and inland waters..An upper level low will move into the region and will linger over the area for the next several days. This will maintain onshore flow through the next week. Small craft strength westerlies will be possible across the central and eastern strait of juan de fuca each afternoon and evening, with the remaining marine waters remaining relatively benign.


7 Day Forecast for Marine Location Near Des Moines, WA
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location: 47.39, -122.35     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 260025
afdsew
area forecast discussion
national weather service seattle wa
525 pm pdt Tue jun 25 2019

Update Quick update to expand thunderstorm coverage a bit
further west across whatcom, skagit, and northern king counties
this evening as well as across portions of grays harbor county.

Instability will quickly decrease this from now through 10pm with
the loss of daytime heating, but there are still pockets with over
500 j kg cape. A fair amount of lightning has been noted and with
freezing level still relatively low. As a result, I would not be
surprised to hear some small hail reports from foothill
communities. Most activity should end in the next 1-2 hours.

However, there is a slight chance that thunderstorms could
persist until 9-10 pm over the north cascades. Will continue to
monitor and update as needed. -wolcott-

Synopsis An upper level trough approaching the area will move
over the pacific northwest on Wednesday. The low will be over the
area until late Friday. The low will slide east on Saturday with a
weak trough over the area on Sunday.

Short term tonight through Friday Satellite imagery shows
high clouds over much of W wa this afternoon with mid level clouds
pushing north across the southern portions of the cwa. A band of
showers is sliding north across lewis county and into the south
sound ahead of the upper level low off the coast. A few showers
will be around through tonight with isolated thunderstorms across
the cascades. A stray thunderstorm will be possible from lewis
county into the sound sound into this evening. Temperatures will
warm a few more degrees this afternoon with highs in the upper 60s
to mid 70s.

An upper level low located near 45n 135w will continue to slide
southeast through tonight and be positioned off the central oregon
coast by Wednesday afternoon. Flow aloft on Wednesday will
transition from southerly to more southeasterly. Instability will
increase throughout Wednesday with daytime heating. CAPE values
along the cascades will vary between 700-1000 j kg, this, combined
with lifted indices from -1 to -4 will promote isolated
thunderstorm development along the crest of the cascades Wednesday
afternoon. Given the flow aloft transitioning more southeasterly,
thunderstorms may push into the foothills late Wednesday afternoon
into Wednesday evening, forecast updated to show this.

Thunderstorm activity further west across the lowlands will be
dependent on the degree to which 700mb to 500mb winds have a more
easterly component. Have kept isolated thunderstorms to cascades
and foothills, but slight possibility exists for activity to
slide further west. Temperatures on Wednesday will be in the mid
60s with a few low 70s in spots.

The upper level low will slide east over the area Thursday and be
over the pac NW through Friday. Numerous showers around W wa on
both days with isolated thunderstorm activity kept along the
southern cascades on Thursday where at least some instability
will exist. Both days will be cool with the upper level low
overhead with highs in the low to mid 60s across the area. Jd

Long term Saturday through Tuesday Guidance suggests
solutions that are a bit different through weekend but both show
similar weather for W wa. Both GFS and ECMWF slide the upper level
low northeast on Saturday with GFS being a tad faster. The gfs
develops a weak upper trough over the area on Sunday with
relatively drier weather for Monday and Tuesday as a weak upper
level ridge builds into the area. The ECMWF generally keeps an
upper level trough over the pac NW through Tuesday with
intermittent showers around W wa. Temperatures will warm into the
upper 60s to low 70s in spots for Saturday and Sunday with mid 70s
possible for Monday and Tuesday. Jd

Aviation Southwest flow aloft becomes southerly tonight as
an upper trough digs southward over the offshore waters. High and
mid level moisture is spreading northward across the area with
a marginally unstable air mass this evening. Scattered shower
activity and isolated thunderstorms will taper off quickly this
evening, with the best chances over the north cascades.

The air mass will moisten further on Wednesday with some MVFR
ceilings possible mainly west of puget sound by morning. The air
mass will become more unstable on Wednesday afternoon and evening
with shower activity increasing. Thunderstorms are possible again
over the cascades and could locally drift into the foothills and
lowlands.

Ksea...VFR with high and mid level moisture and a few showers in the
vicinity this evening. Ceilings look to remain largelyVFR through
Wednesday afternoon with shower chances increasingly sharply by 00z
Thursday. Surface winds w-nw less than 10 knots this afternoon
backing to light southerly after 06z tonight. 27 wolcott

Marine An upper level low will move into the offshore coastal
waters and will linger in the region throughout the week. This
will maintain onshore flow across the area over the next several
days. Flow will be strong enough to produce small craft strength
westerlies along the central and eastern strait of juan de fuca
during most afternoons and evenings. Other waters will remain
mostly below advisory criteria. 14 27

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 5 am pdt Wednesday for central u.S.

Waters strait of juan de fuca-east entrance u.S. Waters
strait of juan de fuca.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 9 mi57 min 1011.3 hPa
TCMW1 - 9446482 - Tacoma Met, WA 9 mi57 min W 11 G 14
WPOW1 - West Point, WA 19 mi39 min NE 8 G 8.9 60°F 1011.3 hPa (+0.9)49°F
46120 26 mi50 min NNE 5.8 61°F 1010 hPa51°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, WA4 mi46 minSW 810.00 miMostly Cloudy67°F46°F49%1011.8 hPa
Boeing Field - King County International Airport, WA10 mi46 minWSW 510.00 miOvercast68°F45°F44%1010.6 hPa
Renton Municipal Airport, WA10 mi46 minS 48.00 miOvercast70°F46°F44%1011.1 hPa
Tacoma, Tacoma Narrows Airport, WA15 mi46 minW 68.00 miMostly Cloudy63°F50°F63%1011.4 hPa
Tacoma / McChord Air Force Base, WA17 mi41 minW 810.00 miFair65°F56°F74%1011.8 hPa
Pierce County-Thun Field, WA20 mi44 minWNW 410.00 miFair66°F50°F56%1011.5 hPa
Bremerton, Bremerton National Airport, WA23 mi43 minSSW 1110.00 miOvercast63°F52°F68%1012.9 hPa
Fort Lewis / Gray U. S. Army Airfield, WA24 mi1.7 hrsWSW 10 G 1910.00 miA Few Clouds66°F54°F67%1011.2 hPa

Wind History from SEA (wind in knots)
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Last 24hrNW4N6N6N7N7CalmN8NE8N5CalmNE4E6S5W5W5W6W7W6SW7SW6SW6SW9SW8SW8
1 day agoN11NE11NE8E6E7E10SE6SE6E5E5SE6S44NW43NE4W6NW63N7W6--CalmNW7
2 days agoSE3SW5S6SW6SW8S5SW5SW7SW6SW8SW6SW5S8S75SW75S5SW3SW3E43N7N13

Tide / Current Tables for Des Moines, Washington
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Des Moines
Click for Map
Tue -- 01:31 AM PDT     Moonrise
Tue -- 02:48 AM PDT     Last Quarter
Tue -- 05:13 AM PDT     Sunrise
Tue -- 06:38 AM PDT     4.36 feet Low Tide
Tue -- 11:44 AM PDT     7.28 feet High Tide
Tue -- 01:29 PM PDT     Moonset
Tue -- 05:30 PM PDT     3.41 feet Low Tide
Tue -- 09:10 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.5119.98.36.65.24.54.44.85.66.57.17.36.96.25.24.23.53.54.35.67.39.110.5

Tide / Current Tables for Skagit Bay, 1 mile S of Goat Island, Washington Current
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Skagit Bay
Click for Map
Tue -- 12:10 AM PDT     -1.27 knots Max Ebb
Tue -- 01:32 AM PDT     Moonrise
Tue -- 02:48 AM PDT     Last Quarter
Tue -- 03:56 AM PDT     0.01 knots Slack
Tue -- 05:14 AM PDT     Sunrise
Tue -- 06:00 AM PDT     1.22 knots Max Flood
Tue -- 09:45 AM PDT     -0.00 knots Slack
Tue -- 12:21 PM PDT     -1.07 knots Max Ebb
Tue -- 01:30 PM PDT     Moonset
Tue -- 03:03 PM PDT     0.03 knots Slack
Tue -- 06:08 PM PDT     1.48 knots Max Flood
Tue -- 09:10 PM PDT     Sunset
Tue -- 09:58 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.3-1.2-1-0.80.211.21.10.90.6-0.4-0.9-1.1-1-0.8-0.10.81.31.51.41.20.8-0.1-0.9

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 (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.