Sunday, April30, 2017 L-36.com


Marine Weather and Tides
Issaquah, 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 5:48AMSunset 8:21PM Sunday April 30, 2017 9:52 AM PDT (16:52 UTC) Moonrise 8:42AMMoonset 12:00AM Illumination 22% Phase: Waxing Crescent; Moon at 5 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- 857 Am Pdt Sun Apr 30 2017
Today..SW wind 5 to 15 kt. Wind waves 2 ft or less. Showers.
Tonight..NW wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less. Showers likely in the evening then a slight chance of showers after midnight.
Mon..SW wind to 10 kt. Wind waves 1 ft or less. A chance of showers in the morning then a slight chance of showers in the afternoon.
Mon night..NW wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Tue..Light wind becoming S to 10 kt in the afternoon. Wind waves 1 ft or less.
Tue night..SW wind to 10 kt becoming S 5 to 15 kt after midnight. Wind waves 2 ft or less.
Wed..S wind 5 to 15 kt becoming n. Wind waves 2 ft or less.
Thu..N wind to 10 kt. Wind waves 1 ft or less.
PZZ100 857 Am Pdt Sun Apr 30 2017
Synopsis for the northern and central washington coastal and inland waters..Moderate to strong onshore flow today will start to ease this evening. Weaker onshore flow will generally prevail this week. A front may increase southerly winds over the coastal waters around Tuesday night.

7 Day Forecast for Marine Location Near Issaquah, WA
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location: 47.54, -122.02     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 301632
afdsew
area forecast discussion
national weather service seattle wa
930 am pdt Sun apr 30 2017

Synopsis A convergence zone will keep showers over the seattle
area today, with scattered showers elsewhere. A weak weather system
will probably bring showers Monday morning. Upper level ridging will
bring mostly dry weather Tuesday through Thursday although Tuesday
night and Wednesday morning may see a little rain. An upper level
trough will bring rain Thursday night through the weekend.

Short term Radar and a glance out the window shows a nice
convergence zone along the king-snohomish county line this morning.

There are scattered showers on the coast and dry, even sunny,
conditions elsewhere. Models show the convergence zone persisting
into this evening even as other areas dry up. Have updated the grids
and forecasts for higher pops in the seattle area today and this
evening. Highs today will be in the 50s.

What had been a weak system heading into oregon on Monday in the
models is now heading more directly into washington. Light rain
seems likely Monday morning, with some drying in the afternoon. Have
also included this idea in the forecast update. Highs Monday will
also be in the 50s.

An upper ridge will build over the area Tuesday, with heights in the
low 570s. Normally this would be a dry pattern but models move a
weather system into the area, right through the upper ridge. This
seems overdone but the forecast does have chance pops over the whole
area by Tuesday evening. High temperatures will be in the mid 50s to
mid 60s. Burke.Aviation... A flat, transient upper ridge axis will
reach 130w
this afternoon and pass eastward across western washington
tonight. It will be closely followed by a weak upper disturbance
on Monday morning, accompanied by deeper moisture and a few hours
of rain. Today's air mass will be moist and unstable below 10,000
feet msl but dry and stable above. The air mass on Monday will
feature deeper moisture and a more stable air mass. With the moist
air mass, MVFR CIGS of 015-030 will be common, with lifting both
this afternoon and Monday afternoon into the 030-045 range.

Ksea... Puget sound convergence zone will be the main weather
challenge today. As of 915 am, it is evident as a band of showers
and lower CIGS 10-20 miles north of the terminal. It will likely
drift south enough this afternoon and evening to bring showers to
the terminal. A northerly wind shift cannot be ruled out late
this afternoon, but winds are more likely to maintain a southerly
component at sea. Nearby bfi is a bit more likely to get a light
north wind for 1-3 hours around 00z (5 pm). Haner

Marine Moderate and briefly strong westerly onshore flow will
peak late this afternoon, then ease tonight. Currently forecasting
a brief round of low-end westerly gales for the eastern and
central strait late this afternoon and early this evening.

Meanwhile, a puget sound convergence zone will hang out near
bremerton and seattle through this evening. Winds will ease
quickly late this evening. Haner

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

Pz... Small craft advisory until 3 pm pdt 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 from 8 pm this evening to 3 am pdt Monday
for central u.S. Waters strait of juan de fuca-east
entrance u.S. Waters strait of juan de fuca.

Gale warning until 8 pm pdt this evening for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.

Small craft advisory until 11 pm pdt this evening for admiralty
inlet-northern inland waters including the san juan islands.

Small craft advisory until 9 pm pdt this evening 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
EBSW1 - 9447130 - Seattle, WA 17 mi52 min Calm G 1 47°F 48°F1024.1 hPa (+2.1)
WPOW1 - West Point, WA 24 mi52 min SE 2.9 G 4.1 47°F 1023.9 hPa (+2.2)45°F
TCNW1 - 9446484 - Tacoma, WA 28 mi52 min 51°F 46°F1024.4 hPa (+1.9)
TCMW1 - 9446482 - Tacoma Met, WA 28 mi52 min WSW 8 G 11
46121 42 mi1417 min 12 49°F 1023.5 hPa38°F

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton, Renton Municipal Airport, WA11 mi59 minSSE 810.00 miOvercast49°F42°F77%1024.2 hPa
Seattle, Seattle Boeing Field, WA15 mi59 minSSW 510.00 miOvercast48°F43°F83%1023.9 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi59 minSSW 810.00 miOvercast48°F42°F80%1024.3 hPa

Wind History from RNT (wind in knots)
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Last 24hr4S5CalmS4S3S5S44CalmSW4W5S6S6SE7SE4S7S9S9S544S5S8S8
1 day agoS3S4NW5N5CalmN4NW4NW4N4CalmNW4CalmCalmCalmCalmCalmCalmS3CalmSE3SE3CalmSE33
2 days agoSE7S7S663W3NW73N3N5CalmNW84CalmCalmCalmS4S4S4S3CalmSE4SE4SE4

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Sun -- 12:17 AM PDT     Moonset
Sun -- 02:41 AM PDT     5.48 feet Low Tide
Sun -- 05:53 AM PDT     Sunrise
Sun -- 07:41 AM PDT     10.39 feet High Tide
Sun -- 09:44 AM PDT     Moonrise
Sun -- 02:54 PM PDT     -1.78 feet Low Tide
Sun -- 08:20 PM PDT     Sunset
Sun -- 10:05 PM PDT     11.48 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.46.85.75.56.37.79.110.110.39.57.95.630.5-1.2-1.8-0.91.13.86.79.210.911.511.1

Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
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Restoration Point
Click for Map
Sun -- 12:15 AM PDT     -0.74 knots Max Ebb
Sun -- 12:18 AM PDT     Moonset
Sun -- 03:52 AM PDT     0.00 knots Slack
Sun -- 05:14 AM PDT     0.30 knots Max Flood
Sun -- 05:53 AM PDT     Sunrise
Sun -- 07:49 AM PDT     -0.00 knots Slack
Sun -- 09:44 AM PDT     Moonrise
Sun -- 11:54 AM PDT     -1.09 knots Max Ebb
Sun -- 03:40 PM PDT     0.01 knots Slack
Sun -- 06:14 PM PDT     0.88 knots Max Flood
Sun -- 08:20 PM PDT     Sunset
Sun -- 10:17 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.7-0.7-0.5-0.20.10.30.30.2-0.1-0.4-0.8-1-1.1-1-0.7-0.30.20.60.90.80.70.40.1-0.3

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 (12,3,4,5)
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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.