Wednesday, July17, 2019 L-36.com


Marine Weather and Tides
Seattle, WA

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Sunrise 5:27AMSunset 9:04PM Wednesday July 17, 2019 3:21 AM PDT (10:21 UTC) Moonrise 8:52PMMoonset 5:07AM Illumination 100% Phase: Full Moon; Moon at 15 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- 256 Am Pdt Wed Jul 17 2019
.small craft advisory in effect through this evening...
Today..S wind 15 to 25 kt. Wind waves 2 to 4 ft. A chance of rain.
Tonight..SW wind 15 to 25 kt easing to 10 to 20 kt after midnight. Wind waves 2 to 4 ft. A chance of rain in the evening then a chance of showers after midnight.
Thu..S wind 5 to 15 kt becoming variable in the afternoon. Wind waves 2 ft or less. A slight chance of showers in the morning then a chance of showers in the afternoon.
Thu night..NW wind 5 to 15 kt becoming se to 10 kt after midnight. Wind waves 2 ft or less.
Fri..SW wind to 10 kt becoming N in the afternoon. Wind waves 2 ft or less.
Fri night..NE wind 5 to 15 kt. Wind waves 2 ft or less.
Sat..N wind to 10 kt. Wind waves 1 ft or less.
Sun..N wind to 10 kt. Wind waves 1 ft or less.
PZZ100 256 Am Pdt Wed Jul 17 2019
Synopsis for the northern and central washington coastal and inland waters..A front will move through the area today with small craft advisory strength southerly winds likely most waters. Westerly winds will increase behind the front with gales in the strait of juan de fuca tonight. Weak high pressure will build toward the area over the weekend.


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 171009
afdsew
area forecast discussion
national weather service seattle wa
309 am pdt Wed jul 17 2019

Synopsis A well organized for july frontal system will move
through western washington later this afternoon into the early
evening hours. A puget sound convergence zone is likely behind the
front. An upper level trough over british columbia will keep a
mention of showers in the forecast through Thursday night. Drying
trend Friday. Warming trend over the weekend as an upper level
ridge builds to the east with dry weather continuing into the
first part of next week.

Short term today through Friday Satellite imagery shows
cloudy skies over western washington early this morning. Rain out
ahead the approaching front has already reached the north coast
and portions of the strait of juan de fuca. Temperatures at 3
am 10z were in the mid 50s to mid 60s.

Frontal system moving down the british columbia coastline reaching
western washington late in the day. The system is well organized
with the support of a healthy 140 knot jet over the eastern
pacific ( it is going to be howling on top of mount rainier
beginning later this morning ). Rain will spread over the area
from northwest to southeast this morning. With the flow aloft
westerly there will be a rain shadow in the central puget sound.

Eventually this afternoon the moist air mass will overcome the
rain shadow with even the seattle metro area getting a couple of
hundredths of an inch of rain. In addition to the rain, breezy
conditions developing this morning and continuing into the
afternoon hours. The olympia to bellingham surface gradient is
forecast to be around 3 mb for most of the day. Clouds and rain
will keep the temperatures from warming up very much from the
current readings with high only in the 60s.

Front moving into the cascades early this evening with a puget
sound convergence zone forming quickly behind the front. Flow
aloft west northwesterly which will push the convergence south
into the northern portion of seattle. Outside of the convergence
zone little in the way of cool air behind the front so just a
chance of showers for the remainder of the area. Lows tonight in
the 50s.

Convergence zone dissipating early Thursday morning. Upper level
trough settling over the area during the day with most of the
energy associated with the trough to the north over british
columbia. Will dry out the southern portion of western washington
in the afternoon keeping a chance of showers from about olympia
northward. Highs will still be below normal Thursday, in the mid
60s to lower 70s.

Weak upper level trough continuing to hang around western
washington and southern british columbia through Friday. As the
trough continues to weaken shower chances will eventually go away
and cloud cover will slowly decrease to the point of partly to
mostly sunny skies Friday afternoon. Highs will start to warm up
a little with mid 60s to mid 70s Friday. Lows Thursday night in
the 50s.

Long term Saturday through Tuesday Extended models in good
agreement with the upper level trough kicking out to the east and
a weak ridge moving through the area Saturday. Four corners high
beginning to build back to the northwest with another upper level
trough digging off the coast Sunday through Tuesday. The trough is
far enough to the west to keep any mention of showers out of the
forecast. Southwesterly flow aloft with 500 mb heights rising
into the lower 580 dms. Varying degrees of low level onshore flow
will keep temperatures from getting too warm Sunday through
Tuesday. An increase in onshore flow Tuesday will cool highs back
down into the upper 60s to upper 70s from the 70s to lower to mid
80s readings Sunday and Monday. Felton

Aviation Increasing westerly flow aloft today as an upper level
trough and associated frontal system approach the region.

A warm front draped across the coastal waters will shift
onshore this morning with ceilings falling to low MVFR or
occasional ifr as light precipitation spreads across the area.

The mountains will be obscured. The trailing cold front will sweep
across the area by early this evening. Low level onshore flow will
increase behind the cold front for gusty surface winds for many area
terminals this evening. Some modest improvement in ceilings possible
late tonight as post-frontal showers dissipate.

Ksea... Ceilings lowering to MVFR this morning as some light
precip spreads into the area. Ceilings could lower to occasional ifr
at times between 18z and 00z as a warm front pushes into the area.

Surface winds s-sw 8 to 14 knots rising to 12 gusting 20 knots at
times with the passage of a cold front this evening. 27

Marine A front will reach western washington today and
south winds will pick up with that front with small craft advisory
strength winds likely most waters. Westerly gales are
expected behind the front tonight behind the front in the central
and eastern strait of juan de fuca. Onshore flow Thursday
will ease Friday and then the winds over the weekend should more
typical summertime diurnal sea-breezes with advisory level
winds in the central and eastern strait each late afternoon and
evening. 27

Hydrology The daily hydrology discussion has ended until the
start of the next rainy season; it will only be updated as needed
until then.

Climate With the forecast high of only 67 degrees in seattle
today will be the 4th day this month with a high in the 60s.

The total number of days with highs in the 60s for the last four
julys, 3. The last time seattle had more than 3 days with highs
in the 60s in july, 2012 with 10 days. Felton

Sew watches warnings advisories
Wa... None.

Pz... Small craft advisory until 6 am pdt Thursday 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 until 7 pm pdt this evening for east
entrance u.S. Waters strait of juan de fuca.

Gale warning from 7 pm this evening to 3 am pdt Thursday 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 northern
inland waters including the san juan islands.

Small craft advisory until 2 am pdt Thursday for admiralty inlet.

Small craft advisory until 7 pm pdt this evening for puget sound
and hood canal.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 2 mi81 min S 16 G 17 59°F 1013.2 hPa (-0.8)56°F
46120 6 mi32 min S 7.8 61°F 1011.5 hPa56°F
TCMW1 - 9446482 - Tacoma Met, WA 28 mi57 min S 7 G 11
TCNW1 - 9446484 - Tacoma, WA 29 mi57 min 64°F 55°F1014.2 hPa
46121 32 mi36 min 62°F 1013.5 hPa57°F
PTWW1 - 9444900 - Port Townsend, WA 35 mi57 min Calm G 1 58°F 52°F1013 hPa
46123 38 mi187 min 61°F

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 mi28 minS 910.00 miA Few Clouds64°F54°F70%1013.4 hPa
Renton Municipal Airport, WA16 mi28 minS 710.00 miA Few Clouds65°F55°F70%1013.7 hPa
Everett Snohomish County, WA17 mi28 minS 1110.00 miOvercast63°F54°F73%1012.7 hPa
Seattle, Seattle-Tacoma International Airport, WA17 mi28 minSSW 1010.00 miMostly Cloudy63°F54°F73%1014 hPa
Bremerton, Bremerton National Airport, WA24 mi25 minSSW 910.00 miMostly Cloudy60°F55°F86%1014.2 hPa

Wind History from BFI (wind in knots)
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Last 24hrW3CalmCalmNW3CalmS3Calm4Calm5NW5--NW4SW4SW6SW5SW6
G14
NW4CalmS3S4S6S7S9
1 day agoCalmN3CalmCalm3CalmSE3SE5W3SW4--S5S6S7S63S4SW4CalmCalm3SW3NW3SW3
2 days agoCalmCalmSW3S3SE6344Calm43335N45NW6W6NW634Calm5Calm

Tide / Current Tables for Meadow Point, Shilshole Bay, Washington
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Meadow Point
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Wed -- 12:10 AM PDT     6.80 feet Low Tide
Wed -- 04:50 AM PDT     9.81 feet High Tide
Wed -- 05:29 AM PDT     Sunrise
Wed -- 06:06 AM PDT     Moonset
Wed -- 12:02 PM PDT     -1.66 feet Low Tide
Wed -- 07:37 PM PDT     11.54 feet High Tide
Wed -- 09:01 PM PDT     Sunset
Wed -- 09:51 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.877.88.79.59.89.37.95.93.40.9-0.9-1.7-1.10.63.15.98.510.411.411.510.79.37.9

Tide / Current Tables for Alki Point, 0.3 miles W of, Washington Current
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Alki Point
Click for Map
Wed -- 01:04 AM PDT     0.00 knots Slack
Wed -- 02:31 AM PDT     0.16 knots Max Flood
Wed -- 04:33 AM PDT     -0.00 knots Slack
Wed -- 05:29 AM PDT     Sunrise
Wed -- 06:06 AM PDT     Moonset
Wed -- 08:40 AM PDT     -0.68 knots Max Ebb
Wed -- 12:26 PM PDT     0.01 knots Slack
Wed -- 03:31 PM PDT     0.83 knots Max Flood
Wed -- 07:30 PM PDT     -0.00 knots Slack
Wed -- 09:01 PM PDT     Sunset
Wed -- 09:51 PM PDT     Moonrise
Wed -- 10:04 PM PDT     -0.41 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.1-00.10.20.1-0.1-0.3-0.5-0.6-0.7-0.6-0.4-0.10.20.60.80.80.70.40.2-0.1-0.3-0.4-0.4

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 (6,6,7,8)
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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.