Saturday, March25, 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 6:56AMSunset 7:30PM Saturday March 25, 2017 4:32 AM PDT (11:32 UTC) Moonrise 4:58AMMoonset 3:51PM Illumination 5% Phase: Waning Crescent; Moon at 27 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- 300 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 300 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 Issaquah, WA
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location: 47.54, -122.02     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 250421
afdsew
area forecast discussion
national weather service seattle wa
921 pm pdt Fri mar 24 2017

Synopsis Showers tonight will slowly decrease on Saturday as an
upper level trough over western washington moves off to the east.

After a brief dry spell Saturday night into early Sunday morning,
another system will bring rain to the area on Sunday. Showers will
follow the system into Monday. Another wet frontal system will
bring rain to the area Tuesday and Wednesday. Drier weather may
return later next week.

Short term Somewhat typical early spring weather -maybe a bit
wetter and cooler than normal- is expected over western
washington over the next few days.

Radars show abundant showers in the interior this evening moving
off to the northeast. Another area of showers from the washington
coast westward is associated with the main body of the trough. The
trough will push inland overnight then off to the east early
Saturday. Area soundings early this evening show a marginally
unstable air mass with "skinny" CAPE values generally less than
200 j/kg; lis across the area are just over zero. With the loss of
insoltion, expect the boundary layer to stabilize somewhat, so
the threat of thunderstorms across western washington this evening
has pretty much come to an end. An update was made to take
thunder out of the forecast this evening
an eastward moving short wave ridge will give decreasing onshore
flow and gradual drying on Saturday, then a short dry period later
Saturday evening through early Sunday morning. Showers on Saturday
will increasingly become tied to the west slopes of the terrain
and a convergence zone that will likely stay north of king county
in the interior. Highs on Saturday will be in the lower to mid
50s.

The next system will move into the area later Sunday with its rain
shield moving in Sunday morning. Clouds and precipitation will
hold temperatures to round 50 on Sunday.

Post frontal showers are expected Sunday night and Monday. Breaks
in the clouds will allow temperatures to warm back into the mid
50s in most locations. Albrecht

Long term From the previous long term discussion: Tuesday
earlier had appeared to be at least somewhat dry, but now both
Tuesday and Wednesday have wet weather systems. This is true of
both the euro and gfs. Thursday will be showery as an upper trough
passes. Friday has a chance of being a dry day, though the GFS is
trying to bring another system in late in the day. Temperatures
will be around normal all four days. Burke

Aviation An upper level trof of low pres will remain over the
region overnight for wly flow aloft. Low level sly flow will grdlly
diminish overnight. Expect areas of MVFR CIGS overnight, with areas
of MVFR vsbys in heavier showers. The air mass was weakly stable.

Ksea... ExpectVFR conditions with ocnl MVFR CIGS thru Saturday
morning. Sly winds will continue to slowly diminish overnight.

Marine
Southerly flow will weaken overnight as weak high pressure builds
along the wa coast. A 1021 mb high over far southwest wa will result
in light onshore flow on Saturday. The next frontal system will move
onshore late Sunday, followed by another one on Tuesday. A stronger
system is possible on Wednesday.

Hydrology River flooding is unlikely over the next 7 days.

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

Pz... Small craft advisory until 6 am pdt Saturday 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 from 6 am to 3 pm pdt
Saturday 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 rough bar until 6 am pdt Saturday for
grays harbor bar.

Small craft advisory until midnight pdt tonight for admiralty
inlet-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-east entrance u.S. Waters strait of
juan de fuca-northern inland waters including the san juan
islands-puget sound and hood canal-west entrance u.S.

Waters strait of juan de fuca.

Small craft advisory for hazardous seas from midnight tonight to
3 pm pdt Saturday 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.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 17 mi45 min SSE 8.9 G 15 46°F 47°F1017.4 hPa
WPOW1 - West Point, WA 24 mi33 min S 22 G 25 46°F 1016.9 hPa (+0.4)42°F
TCNW1 - 9446484 - Tacoma, WA 28 mi57 min 46°F 47°F1018.5 hPa
TCMW1 - 9446482 - Tacoma Met, WA 28 mi45 min S 5.1 G 9.9
46121 42 mi36 min 9.7 44°F 1017.7 hPa41°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 mi40 minSSE 710.00 miLight Rain46°F39°F79%1018.4 hPa
Seattle, Seattle Boeing Field, WA15 mi40 minS 1110.00 miLight Rain46°F43°F89%1017.7 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi40 minSSW 1110.00 miLight Rain45°F39°F83%1018.5 hPa

Wind History from RNT (wind in knots)
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Last 24hrS4S43SE5SE4SE3E5S10S10
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SE7S7SE4SE5CalmSE3SE5S7S7
1 day agoSE4E3S3SE3S5S6S8SE76S6CalmS7S5SW5S3S73N3N3NW4NW4CalmW3Calm
2 days agoS4CalmS3S3CalmS9
G14
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G24
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5SE5SE4SE5S7SE5E4SE6SE3

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Sat -- 04:29 AM PDT     10.75 feet High Tide
Sat -- 05:59 AM PDT     Moonrise
Sat -- 07:01 AM PDT     Sunrise
Sat -- 10:31 AM PDT     4.50 feet Low Tide
Sat -- 03:41 PM PDT     9.27 feet High Tide
Sat -- 04:52 PM PDT     Moonset
Sat -- 07:29 PM PDT     Sunset
Sat -- 10:23 PM PDT     0.95 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.75.98.19.810.710.79.98.66.95.44.64.65.46.78.19.19.28.67.45.63.7211.2

Tide / Current Tables for Restoration Point, 0.6 miles ESE of, Washington Current
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Restoration Point
Click for Map
Sat -- 12:49 AM PDT     0.61 knots Max Flood
Sat -- 04:27 AM PDT     -0.00 knots Slack
Sat -- 06:00 AM PDT     Moonrise
Sat -- 07:01 AM PDT     Sunrise
Sat -- 07:43 AM PDT     -0.71 knots Max Ebb
Sat -- 11:26 AM PDT     0.00 knots Slack
Sat -- 01:01 PM PDT     0.33 knots Max Flood
Sat -- 03:50 PM PDT     -0.00 knots Slack
Sat -- 04:52 PM PDT     Moonset
Sat -- 07:30 PM PDT     Sunset
Sat -- 07:35 PM PDT     -0.85 knots Max Ebb
Sat -- 11:11 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.60.50.40.1-0.2-0.5-0.7-0.7-0.6-0.4-0.10.20.30.30.2-0-0.4-0.6-0.8-0.8-0.7-0.4-0.1

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 (7,2,3,4)
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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.