Thursday, May23, 2019 L-36.com


Marine Weather and Tides
Seattle, WA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 5:20AMSunset 8:51PM Thursday May 23, 2019 7:46 AM PDT (14:46 UTC) Moonrise 12:00AMMoonset 8:30AM Illumination 79% Phase: Waning Gibbous; Moon at 19 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 Thu May 23 2019
Today..SW wind to 10 kt becoming N in the afternoon. Wind waves 1 ft or less.
Tonight..N wind 5 to 15 kt becoming S after midnight. Wind waves 2 ft or less. A slight chance of showers after midnight.
Fri..S wind 5 to 15 kt becoming sw 15 to 25 kt in the afternoon. Wind waves 2 ft or less building to 2 to 4 ft in the afternoon. A slight chance of showers in the morning then a chance of showers in the afternoon.
Fri night..SW wind 10 to 20 kt becoming S to 10 kt after midnight. Wind waves 1 to 3 ft subsiding to 1 ft or less after midnight.
Sat..S wind to 10 kt. Wind waves 1 ft or less.
Sat night..NW wind to 10 kt becoming N after midnight. Wind waves 1 ft or less.
Sun..NW wind to 10 kt becoming n. Wind waves 1 ft or less.
Mon..SW wind to 10 kt rising to 10 to 20 kt. Wind waves 1 ft or less building to 1 to 3 ft.
PZZ100 300 Am Pdt Thu May 23 2019
Synopsis for the northern and central washington coastal and inland waters..Light flow this morning will become onshore and increase this afternoon and evening. The onshore flow will ease a bit Friday and Saturday with the low level flow becoming light Sunday. Onshore flow will increase again on Monday.


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 230950
afdsew
area forecast discussion
national weather service seattle wa
250 am pdt Thu may 23 2019

Synopsis Afternoon evening showers and thunderstorms over the
mountains again today. A system will bring more widespread showers
to the area Friday into Saturday. Drier conditions possible next
week though the chance for mountain showers may continue.

Short term today through Saturday Marine stratus has made a
push into the southwest interior and down the strait early this
morning with ceilings between 300 and 500 feet. Oth-sea gradient
has relaxed slightly overnight but some patchy stratus may make it
close to the metro area by daybreak. Should erode back to near
the coast by mid or late morning. Otherwise fairly mild overnight
temperatures and plenty of sunshine should result in a few degrees
of warming from Wednesday's highs. Showers and isolated
thunderstorms will pop up in the mountains later this afternoon
and evening with marginal instability. Like yesterday, activity
shouldn't be super widespread.

Upper level trough will drop south from bc on Friday, bringing
the chance for more widespread showers. Amounts look to be fairly
light. This will serve to cool temperatures back into the 60s for
the start of the weekend. Fairly new over the past few model runs,
solutions show a secondary low dropping SE along the coast
Saturday which may bring additional showers. Have hedged forecast
in this direction though don't expect it to be a washout. Ceo

Long term Sunday through Wednesday Aforementioned low drops
south of the region on Sunday with high pressure returning into
mid-week. This should bring dry weather to most, though diurnal
showers possible over the mountains each day. Afternoon highs will
warm back into the 70s, except for along the coast which will be
in the upper 60s. Ceo

Aviation Light northerly flow aloft becoming northwesterly
tonight and Friday as a broad upper level trough drops down from
the north. In the lower levels light flow today becoming onshore
tonight and Friday.

Stratus along the coast has spread inland to the southwest
interior, kitsap peninsula and down the strait of juan de fuca.

Ceilings with the stratus, below 1000 feet. The marine layer is
shallow and will not advance much further east this morning but
will get far enough to get into the central puget sound terminals
for a couple of hours, 12z-16z, this morning. The layer will
dissipate this afternoon then return overnight with stronger
onshore flow lifting the ceilings for Friday morning up into the
1000-2000 foot range. Air mass still slightly unstable over the
higher terrain this afternoon into the evening hours for possible
showers or an isolated thunderstorm.

Ksea... Ceilings with the stratus around 500 feet msl and with the
gradients weakening expect the terminal to fog in 12z-16z with
ceilings 200 feet or less and visibility below 1 mile. The layer
is shallow and will dissipate around 16z leaving just scattered
clouds. Stratus returning to the airport in the early morning
hours on Friday with ceilings around 1000 feet.

Light wind becoming northwesterly 4 to 8 knots around 18z. Wind
switching to southwesterly after 03z tonight. Felton

Marine Light flow this morning will becoming onshore and
increase this afternoon into tonight. The low level onshore flow
will gradually decrease Friday and Saturday. Small craft advisory
strength west winds both Thursday and Friday evenings for the
central and east entrance strait of juan de fuca.

With the increasing onshore flow small craft advisory northwest
winds will develop over the coastal waters today and continue into
Friday. Gale force northwesterlies are possible over the outer
coastal waters on Friday.

Winds will ease for the weekend as the low level flow becomes
light. Onshore flow will increase again on Monday.

In addition to the winds there will also be 10-14 foot west to
northwest swell over the outer coastal waters beginning Friday
with the swell building to around 10 feet over the inner coastal
waters Friday night and Saturday. Felton

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... Gale watch from Friday morning through Friday 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 5 am pdt Friday 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 from 6 pm this evening to 6 pm pdt Friday
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.

Small craft advisory from 6 pm this evening to 5 am pdt Friday
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
WPOW1 - West Point, WA 2 mi46 min S 5.1 G 6 52°F 1018.2 hPa (+0.4)51°F
46120 6 mi24 min 53°F 1016.8 hPa51°F
46125 19 mi22 min 7.8 50°F 1017.2 hPa50°F
TCMW1 - 9446482 - Tacoma Met, WA 28 mi34 min WSW 4.1 G 5.1
TCNW1 - 9446484 - Tacoma, WA 29 mi40 min 53°F 51°F1018.4 hPa
46121 32 mi18 min 53°F 1017.9 hPa53°F
PTWW1 - 9444900 - Port Townsend, WA 35 mi34 min SSE 2.9 G 2.9 52°F 50°F1018.3 hPa

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Boeing Field - King County International Airport, WA12 mi53 minSSE 55.00 miFog/Mist54°F51°F90%1017.9 hPa
Renton Municipal Airport, WA16 mi53 minS 34.00 miFog/Mist56°F53°F90%1018.3 hPa
Everett Snohomish County, WA17 mi53 minNNE 45.00 miFog/Mist54°F52°F93%1017.8 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi53 minSSW 50.13 miFog53°F51°F93%1018.5 hPa
Bremerton, Bremerton National Airport, WA24 mi50 minSW 40.15 miFog52°F51°F97%1019.5 hPa

Wind History from BFI (wind in knots)
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Last 24hrS4CalmN4W344NW66NW8NW105NW63CalmCalmNW3SE5CalmS5CalmCalmSE7CalmS5
1 day agoCalmNE4653555E43NE45CalmE4CalmSE3SE4CalmCalmCalmSE3SE6SE3SE5
2 days agoS6S95S7S6SW5S8S7S4SE5S4E5E3E4NE8NE7E4CalmCalmCalmCalmCalm3Calm

Tide / Current Tables for Meadow Point, Shilshole Bay, Washington
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Meadow Point
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Thu -- 12:39 AM PDT     Moonrise
Thu -- 03:06 AM PDT     6.76 feet Low Tide
Thu -- 05:23 AM PDT     Sunrise
Thu -- 07:34 AM PDT     8.87 feet High Tide
Thu -- 09:30 AM PDT     Moonset
Thu -- 02:46 PM PDT     -0.63 feet Low Tide
Thu -- 08:50 PM PDT     Sunset
Thu -- 10:31 PM PDT     11.26 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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9.68.27.26.877.68.38.88.88.26.85.131.1-0.3-0.60.21.94.16.68.810.411.211.2

Tide / Current Tables for Alki Point, 0.3 miles W of, Washington Current
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Alki Point
Click for Map
Thu -- 12:15 AM PDT     -0.38 knots Max Ebb
Thu -- 12:39 AM PDT     Moonrise
Thu -- 04:27 AM PDT     0.00 knots Slack
Thu -- 05:22 AM PDT     0.06 knots Max Flood
Thu -- 05:23 AM PDT     Sunrise
Thu -- 06:55 AM PDT     -0.00 knots Slack
Thu -- 09:30 AM PDT     Moonset
Thu -- 11:23 AM PDT     -0.56 knots Max Ebb
Thu -- 03:11 PM PDT     0.00 knots Slack
Thu -- 06:19 PM PDT     0.69 knots Max Flood
Thu -- 08:50 PM PDT     Sunset
Thu -- 10:20 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.4-0.4-0.3-0.2-00.10.1-0-0.1-0.3-0.5-0.6-0.5-0.4-0.3-00.30.60.70.70.50.30.1-0.1

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 (10,2,3,4)
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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.