Thursday, August17, 2017 L-36.com


Marine Weather and Tides
Snoqualmie, WA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 6:05AMSunset 8:18PM Wednesday August 16, 2017 11:02 PM PDT (06:02 UTC) Moonrise 12:00AMMoonset 3:06PM Illumination 26% Phase: Waning Crescent; Moon at 25 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
    EDIT      (on/off)   Help
PZZ135 Puget Sound And Hood Canal- 900 Pm Pdt Wed Aug 16 2017
Tonight..NW wind 10 kt or less becoming variable. Wind waves 1 ft or less.
Thu..Variable wind 10 kt or less. Wind waves 1 ft or less. Patchy morning drizzle.
Thu night and Fri..N wind 10 kt or less. Wind waves 1 ft or less.
Fri night through Mon..N wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 900 Pm Pdt Wed Aug 16 2017
Synopsis for the northern and central washington coastal and inland waters..Onshore flow of varying strength will continue through early next week due to persistent high pres offshore with lower pres east of the cascades.

7 Day Forecast for Marine Location Near Snoqualmie, WA
   Hourly   EDIT   Help
location: 47.53, -121.84     debug


Area Discussion for - Seattle, WA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 ksew 170413
afdsew
area forecast discussion
national weather service seattle wa
900 pm pdt Wed aug 16 2017

Synopsis An upper level ridge moving over the pacific northwest
coupled with low level onshore flow will maintain seasonable summer
weather with areas of morning clouds into Friday. A weak upper level
trough is expected to bring some cooling and possibly some drizzle
late Friday into Saturday morning. Another upper level ridge will
rebuild over the region Sunday through Tuesday for a bit warmer
conditions.

Short term Westerly flow aloft with embedded weak shortwaves will
continue through the rest of this week. One shortwave that moved
into british columbia this morning brought some middle and high
clouds into western washington during the day today along with a few
sprinkles. Those clouds should continue inland tonight. The system
has induced stronger low level onshore flow and marine clouds will
spread inland overnight. Prog cross-sections show the tops to be
near 850 mb 5000 ft by Thursday morning and thick enough to perhaps
squeeze out a little drizzle.

The next positive tilt shortwave was crossing around 160w early this
afternoon. Progs concur that this shortwave will build some ridging
aloft ahead of it moving over the pacific NW Thursday. So anticipate
the marine cloud deck to thin out during the afternoon as a result.

The following shortwave is forecast to track into bc on Friday with
heights aloft over western washington sagging into Saturday. Will
retain a small threat of showers closer to the canadian border and
in the mountains with some orographic flow later Friday into
Saturday morning. Renewed stronger low level onshore flow should
result in a blanket of marine clouds across much of western
washington Saturday morning. Anticipate daytime temperatures to be a
bit cooler - close to or just under average Saturday.

Long term What's left of former typhoon banyon was located near
37n 160e and becoming extratropical. The mid-range progs continue to
build ridging downstream from this system over the pacific NW Sunday
into Monday for a return to less morning marine clouds and more warm
sunshine early next week. The seattle-north bend or surface pressure
gradient turns offshore by Monday morning. Again, there are 5 days
to go before the eclipse... But at this point any morning marine
clouds may be limited to just the coastal region and any inland
should be short-lived.

Heading into the Tuesday and Wednesday, the mid-range guidance
offers a developing upper level trough off the coast with a growing
threat of showers. The euro is faster and stronger while the GFS and
canadian are slower and weaker with this trend. For now have
introduced a threat of showers and some cooler temperatures on
Wednesday. Buehner

Aviation Northwesterly flow aloft will become westerly on
Thursday. Low level onshore flow continuing through Thursday.

Stratus along the coast this evening will spread inland over the
remainder of the terminals early Thursday morning. In general
ceilings in the 1000 to 2000 foot range Thursday morning with
ceilings improving late in the morning. The clouds will scatter out
over the interior in the early afternoon hours with the breakout
along the coast a little later in the afternoon.

Ksea... Stratus arriving at the terminal around 12z with ceilings
1000-1500 feet. Ceilings improving mid to late morning with the
stratus scattering out 19z-20z. Variable wind less than 6 knots
becoming southerly overnight. Winds becoming northwesterly Thursday
afternoon. Felton

Marine Onshore flow of varying strength will continue through
early next week due to persistent high pressure offshore with lower
pressure east of the cascades. The onshore flow will be strong
enough for brief gale force westerlies over the central and eastern
strait of juan de fuca late tonight. There is a possibility of gale
force winds over the same area Friday evening. Felton

Sew watches warnings advisories
Wa... None.

Pz... Gale warning until 2 am pdt Thursday for central u.S. Waters
strait of juan de fuca-east entrance u.S. Waters strait of
juan de fuca.



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 27 mi45 min WNW 1.9 G 2.9 62°F 56°F1019 hPa
WPOW1 - West Point, WA 33 mi63 min N 12 G 12 62°F 1019 hPa (+1.0)58°F
TCMW1 - 9446482 - Tacoma Met, WA 35 mi45 min WSW 7 G 8.9
TCNW1 - 9446484 - Tacoma, WA 35 mi51 min 67°F 56°F1019.5 hPa

Wind History for Seattle, Puget Sound, WA, WA
(wind in knots)    EDIT      (on/off)   Help
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
-12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
Last
24hr
W2
SW2
--
W3
N1
NE3
NW4
S2
SE2
W3
NW5
NW4
N1
G5
NW1
NW1
G4
NW4
NW2
G7
NW5
W2
NW8
N1
G4
SE1
W6
G9
1 day
ago
NW3
SW1
E1
N2
SW3
SW3
SW2
S2
W1
E2
G5
W5
NW4
G7
W8
G11
W6
W6
G10
W10
NW10
NW5
G10
NW6
NW3
G6
N3
G8
NW3
G6
2 days
ago
NW4
NW4
NW5
N1
G4
--
NW3
W7
NW9
NW7
G10
NW7
G10
NW4
G7
NW2
G6
N5
G9

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Renton Municipal Airport, WA20 mi70 minNNW 59.00 miOvercast72°F59°F64%1018.9 hPa
Boeing Field - King County International Airport, WA24 mi70 minVar 310.00 miPartly Cloudy70°F60°F71%1018.6 hPa

Wind History from RNT (wind in knots)
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last 24hrNW8NW7NW5CalmCalmCalmSE3CalmSE4S65SE4SE63N5N4NW544NW3SW36NW5Calm
1 day agoNW6NW53CalmCalmS3SE3SE3SE3NW6NW6NW9NW6NW7NW8NW8NW8NW6NW7NW7N5NW8NW9N3
2 days ago--CalmN3Calm3N4CalmN3CalmN5Calm4NW8NW5NW7NW8NW7NW6NW5NW7N6NW7NW7NW8

Tide / Current Tables for Duwamish Waterway, Washington
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Duwamish Waterway
Click for Map
Thu -- 12:18 AM PDT     10.49 feet High Tide
Thu -- 01:39 AM PDT     Moonrise
Thu -- 06:08 AM PDT     Sunrise
Thu -- 07:53 AM PDT     -0.55 feet Low Tide
Thu -- 03:07 PM PDT     9.79 feet High Tide
Thu -- 05:12 PM PDT     Moonset
Thu -- 08:13 PM PDT     6.27 feet Low Tide
Thu -- 08:17 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.410.39.37.75.63.31.3-0.1-0.50.11.73.86.28.19.39.89.68.87.76.86.36.57.38.5

Tide / Current Tables for Seattle, Washington
   EDIT      (on/off)   Help   One Week of Data
Seattle
Click for Map
Thu -- 12:17 AM PDT     10.82 feet High Tide
Thu -- 01:39 AM PDT     Moonrise
Thu -- 06:08 AM PDT     Sunrise
Thu -- 07:42 AM PDT     -0.58 feet Low Tide
Thu -- 03:06 PM PDT     10.09 feet High Tide
Thu -- 05:12 PM PDT     Moonset
Thu -- 08:02 PM PDT     6.60 feet Low Tide
Thu -- 08:17 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.810.69.57.85.53.11-0.3-0.50.324.26.58.59.710.19.897.976.66.97.78.9

Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Seattle, WA (2,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Seattle/Tacoma, WA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.