Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Seattle, WA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:57AMSunset 7:32PM Saturday March 25, 2017 8:44 AM PDT (15:44 UTC) Moonrise 5:00AMMoonset 3:52PM Illumination 4% Phase: Waning Crescent; Moon at 28 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- 459 Am Pdt Sat Mar 25 2017
Today..S wind 10 to 20 kt...becoming sw 5 to 15 kt by noon. Wind waves 3 ft or less. A chance of showers.
Tonight..Variable wind 10 kt or less. Wind waves 1 ft or less.
Sun..SE wind 5 to 15 kt. Wind waves 2 ft or less. Rain.
Sun night..S wind 10 to 20 kt. Wind waves 3 ft or less.
Mon..SW wind 15 to 25 kt. Wind waves 1 to 4 ft.
Mon night..SW wind 10 to 20 kt...becoming S 15 to 25 kt. Wind waves 1 to 4 ft.
Tue..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Wed..SW wind 10 to 20 kt. Wind waves 3 ft or less.
PZZ100 459 Am Pdt Sat Mar 25 2017
Synopsis for the northern and central washington coastal and inland waters..A 1020 mb high will develop over the far sw washington coast this.afternoon and this will cause the onshore flow to weaken. The flow will become easterly tonight in response to falling pres over the offshore waters. An occluded front is expected to move across the area Sunday night.

7 Day Forecast for Marine Location Near Seattle, WA
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location: 47.68, -122.41     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 251057
afdsew
area forecast discussion
national weather service seattle wa
357 am pdt Sat mar 25 2017

Synopsis An upper level trough will move east of the area this
morning. After a brief dry spell tonight another weather system
will bring rain back to western washington beginning Sunday
morning. Showers behind the front for Monday with another wet
system moving into the area Tuesday and Wednesday. There is a
chance for a dry day late next week.

Short term Satellite imagery shows upper level trough right
along the coast at 3 am/10z with the next system to reach the area
back out near 45n/145w. Doppler radars picking up plenty of
shower activity with the trough with most of the activity west of
the puget sound. With mostly cloudy skies over the area
temperatures were in the 40s.

Upper level trough axis moving through western washington this
morning. Shower activity will decrease significantly behind the
trough. Possible convergence zone development over northern
snohomish and southern skagit county later this morning into the
early afternoon hours but with the surface gradients becoming
light convergence zone will dissipate late in the day. Expect a
little bit of sunshine this afternoon but high temperatures will
remain below normal... In the upper 40s to mid 50s.

A brief break in the action tonight with the upper level trough
to the east and the next system still offshore. Rain out ahead of
the front will be near the coast by 12z. Lows will be in the upper
30s to mid 40s.

Next system moving into western washington on Sunday. Parent low
well north of the area near southern alaska while the jet stream
is aimed at northern california. The front will get stretched out
a weaken a little as it moves into western washington late in the
day. This will cut down on the rainfall amounts with less than a
half inch expected in most locations. Highs will the early arrival
of the precipitation will continue to be below normal... Near 50.

Trailing upper level trough just along the coast at 12z Monday
keeping showers in the forecast for Sunday night. Near the coast
by 12z Monday. Upper level trough axis moving through western
washington Monday morning with the shower activity becoming
confined to the coast and mountains in the afternoon. Another
convergence zone near the snohomish/skagit county line possible
Monday afternoon. Highs will continue to be cool... In the upper
40s to mid 50s. Lows on Sunday night will be in the upper 30s to
mid 40s.

Long term Extended models in good agreement with yet another
front approaching western washington on Tuesday. The front stalls
over the area Tuesday night into Wednesday. Strong southwesterly
flow aloft with enhanced precipitation along the south slopes of
the olympics. Upper level trough moving through Thursday morning
with drying northwesterly flow aloft behind the trough later in
the day on Thursday. Race Thursday night into Friday between an
approaching warm front and a building upper level ridge over
western washington. 00z run gives the ridge the upper hand and
pushes the warm front north of the area. Will stay with a dry
forecast for day 7. Felton

Aviation An upper level trof of low pres over the region early
this morning will cont moving east and will be over id this
afternoon. Contd wly flow aloft. Low level sly or onshore flow will
cont diminishing. Expect areas of MVFR cigs, with areas of MVFR
vsbys with heavier showers. The mtns will be partially obscd.

Ksea... Expect ocnl MVFR cigs, mainly this morning. Heavier showers
will also lower the visibility in the MVFR category range this
morning.VFR conditions are anticipated this afternoon thru tonight.

Sly winds will slowly diminish during the day today, becoming light
and variable tonight.

Marine
A 1020 mb high will develop over the far southwest wa coast this
afternoon, and this will cause the onshore flow to weaken. The flow
will become easterly or offshore tonight in response to falling
pressure over the offshore waters. An occluded front is expected to
move across the area Sunday night. Gale force southeasterlies are
possible over the coastal waters, beyond 10 nm, on Sunday ahead of
the front. Expect another frontal system to impact the area on
Tuesday.

Hydrology No river flooding is expected for the next 7 days
with the exception of the flood prone skokomish river where
enhanced rainfall amounts along the south slopes of the olympics
Tuesday night int Wednesday could be enough to get the river to
flood stage. Felton

Climate With 0.24 inches yesterday the monthly precipitation
total for seattle is now 6.11 inches. Combined with the 8.85
inches in february this is only the 3rd time since weather records
started in seattle in the 1890's that both february and march have
gotten 6 inches plus of precipitation. The other two occurrences
2014 and 1972. Felton

Sew watches/warnings/advisories
Wa... None.

Pz... Gale watch from Sunday morning through Sunday afternoon 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.

Small craft advisory for hazardous seas until 3 pm pdt this
afternoon 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.

Small craft advisory until 9 am pdt this morning for 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
WPOW1 - West Point, WA 2 mi45 min S 8.9 G 11 44°F 1019.1 hPa (+1.7)41°F
EBSW1 - 9447130 - Seattle, WA 7 mi45 min SSE 4.1 G 8 45°F 47°F1019.5 hPa (+1.6)
TCMW1 - 9446482 - Tacoma Met, WA 28 mi45 min S 5.1 G 8
TCNW1 - 9446484 - Tacoma, WA 29 mi45 min 45°F 44°F1019.9 hPa (+1.2)
46121 32 mi39 min 7.8 44°F 1019.1 hPa40°F
PTWW1 - 9444900 - Port Townsend, WA 35 mi45 min E 2.9 G 5.1 46°F 47°F1019.3 hPa (+1.5)

Wind History for Seattle, Puget Sound, WA, WA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Seattle, Seattle Boeing Field, WA12 mi52 minS 810.00 miMostly Cloudy45°F41°F86%1019.4 hPa
Renton, Renton Municipal Airport, WA16 mi52 minSSE 810.00 miOvercast45°F41°F86%1019.8 hPa
Everett Snohomish County, WA17 mi52 minS 910.00 miOvercast42°F39°F89%1018.9 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi52 minS 1110.00 miMostly Cloudy43°F39°F89%1020 hPa
Bremerton, Bremerton National Airport, WA24 mi50 minS 8 G 1410.00 miMostly Cloudy41°F39°F93%1019.6 hPa

Wind History from BFI (wind in knots)
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Last 24hrSE5S9S8S10S13
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1 day agoS7S74S8SE6S854SE7SW5W5SW6CalmCalmW3CalmNE3CalmE4SE4SE3CalmSE8W5
2 days agoCalmSW8S7
G15
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S8S7SE8SE8SE4

Tide / Current Tables for Meadow Point, Shilshole Bay, Washington
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Meadow Point
Click for Map
Sat -- 04:28 AM PDT     10.86 feet High Tide
Sat -- 06:00 AM PDT     Moonrise
Sat -- 07:01 AM PDT     Sunrise
Sat -- 10:19 AM PDT     4.69 feet Low Tide
Sat -- 03:40 PM PDT     9.37 feet High Tide
Sat -- 04:52 PM PDT     Moonset
Sat -- 07:30 PM PDT     Sunset
Sat -- 10:11 PM PDT     0.99 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
46.28.41010.810.8108.66.95.44.74.95.778.39.29.38.77.35.53.51.811.4

Tide / Current Tables for Alki Point, 0.3 miles W of, Washington Current
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Alki Point
Click for Map
Sat -- 12:43 AM PDT     0.61 knots Max Flood
Sat -- 04:14 AM PDT     -0.00 knots Slack
Sat -- 06:00 AM PDT     Moonrise
Sat -- 07:01 AM PDT     Sunrise
Sat -- 07:10 AM PDT     -0.48 knots Max Ebb
Sat -- 10:50 AM PDT     0.00 knots Slack
Sat -- 12:55 PM PDT     0.33 knots Max Flood
Sat -- 03:37 PM PDT     -0.00 knots Slack
Sat -- 04:52 PM PDT     Moonset
Sat -- 07:02 PM PDT     -0.56 knots Max Ebb
Sat -- 07:30 PM PDT     Sunset
Sat -- 10:35 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.60.50.30.1-0.2-0.4-0.5-0.4-0.3-0.100.30.30.30.1-0.1-0.3-0.5-0.6-0.5-0.4-0.10.2

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Seattle, WA (11,2,3,4)
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Ground Weather Radar Station Seattle/Tacoma, WA
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weather_mapweather_map weather_map

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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.