Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
Marietta-Alderwood, WA

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:48AMSunset 7:20PM Tuesday September 17, 2019 2:41 PM PDT (21:41 UTC) Moonrise 8:09PMMoonset 9:14AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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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PZZ133 Northern Inland Waters Including The San Juan Islands- 300 Pm Pdt Tue Sep 17 2019
.gale warning in effect until 5 pm pdt this afternoon...
.small craft advisory in effect until 11 pm pdt this evening...
Rest of today..SE wind 25 to 35 kt. Wind waves 4 to 6 ft. Showers.
Tonight..SE wind 15 to 25 kt easing to 10 to 20 kt after midnight. Wind waves 1 to 4 ft. Showers in the evening then showers likely after midnight.
Wed..NE wind to 10 kt becoming nw 5 to 15 kt in the afternoon. Wind waves 2 ft or less. A chance of showers. A slight chance of tstms in the afternoon.
Wed night..W wind 5 to 15 kt becoming se after midnight. Wind waves 2 ft or less.
Thu..SE wind 5 to 15 kt becoming S in the afternoon. Wind waves 2 ft or less.
Thu night..SW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri..S wind 5 to 15 kt becoming se in the afternoon. Wind waves 2 ft or less.
Fri night..S wind to 10 kt. Wind waves 1 ft or less.
Sat..SE wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..S wind 5 to 15 kt becoming W 15 to 25 kt. Wind waves 2 ft or less building to 2 to 4 ft.
PZZ100 300 Pm Pdt Tue Sep 17 2019
Synopsis for the northern and central washington coastal and inland waters..Southerly winds will ease tonight. Onshore flow will prevail Wednesday through Friday with high pres offshore and lower pres inland. Another frontal system will approach from the west on Saturday.


7 Day Forecast for Marine Location Near Marietta-Alderwood, WA
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location: 48.76, -122.7     debug


Area Discussion for - Seattle, WA
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Fxus66 ksew 171554
afdsew
area forecast discussion
national weather service seattle wa
854 am pdt Tue sep 17 2019

Synopsis A cold front will move through western washington
today bringing rain and windy conditions. Cool upper level trough
settling over the area tonight and Wednesday keeping showers in
the forecast. A weak upper level ridge will build into british
columbia Thursday with the ridge remaining over the region into
Saturday. A weak system will try and move through the ridge
Friday. Another frontal system will arrive Sunday.

Short term today through Thursday The current forecast is on
track. Another wet pacific frontal system is spreading rain inland
this morning with gusty south winds to 30 mph (mostly in the north
interior). The front will push through early this afternoon with
showers becoming more scattered. There is a slight chance of
thunderstorms along the coast associated with the upper low and
cold pool. Temperatures only in the low to mid 60s today. 33
previous discussion... Cool upper level trough settling in over
western washington behind the front later tonight into Wednesday
keeping showers in the forecast. Convective variables area good
enough ( lifted indexes near 0, convective temperatures in the mid
60s, CAPE around 200 j kg ) to have a chance of thunderstorms in
the forecast for Wednesday afternoon. Wind aloft very light below
25,000 feet, 10 knots or less except for a thin layer of 15 knot
winds near 500 mb ) Wednesday afternoon so if a thunderstorm does
develop it will be nearly stationary and have the potential create
a brief round of heavy rain. Lows tonight in the mid 40s to mid
50s. Highs Wednesday in the lower to mid 60s.

Trough moving east Wednesday night with the shower threat coming
to an end. Weak upper level ridge nosing into british columbia
later Wednesday night into Thursday with dry northerly flow aloft
over western washington. Plenty of low level moisture hanging
around combined with light southerly gradients at the surface and
the longer nights this time of year for some morning low clouds
Thursday morning. Stratus layer dissipating in the afternoon.

Highs a little warmer with the warmest locations near 70 and the
remainder of the area in the 60s. Thursday morning lows in the
mid 40s to mid 50s. Felton

Long term Friday through Monday Previous discussion... Extended
models still trying to bring a weak shortwave down the back of
the ridge into western washington on Friday. ECMWF is the stronger
of the model solutions with this feature but also has mid 570 dms
over the area. Northerly trajectory of the shortwave does not
bode well for much of it to be left once it reaches western
washington. Will leave just a chance of showers in the forecast.

Ridge rebuilding a little on Saturday in response to the next
organized frontal system that is currently timed to reach the area
on Sunday. Models have had the front for multiple runs in a row
increasing confidence that Sunday is going to be a wet day. Like
the system today, models show an upper level ridge building into
british columbia behind the front Monday. Highs remain near or a
little below normal through the period with 60s common and a few
lower 70s Friday and Saturday and possibly again on Monday. Felton

Aviation Southwest flow aloft today will become light southerly
tonight as an upper trough moves over the area. A front over puget
sound this morning will move east of the cascades in the afternoon.

At the surface, strong SE flow today will become weakly onshore
tonight. The air mass is moist and stable this morning but will
become slightly unstable in post frontal conditions this afternoon.

Light rain is falling out of aVFR deck around 7k ft. Ceilings
will fall to 3-4k ft briefly as the front passes, then revert
to mostlyVFR in post frontal conditions this afternoon. Some
MVFR in showers is possible. Visibilities will also lower to 3-5
miles at times. Ceilings are likely to fall to MVFR overnight.

Ksea... MostlyVFR ceilings today, with perhaps a few hours of 3k ft
ceilings 16z-19z. Showers in the afternoon could also briefly lower
ceilings to MVFR. Southerly wind increasing to 10-20 kt around
midday, then easing tonight. Chb

Marine A strong frontal system is bringing southerly gales to the
coast, east entrance, and northern inland waters this morning, with
small craft advisory strength southerly winds over the rest of the
waters. Winds will subside later today and tonight behind the front.

Weak onshore flow will prevail Wednesday through Friday with high
pressure offshore and lower pressure inland. Another frontal system
will approach from the west on Saturday. Chb

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 warning until 5 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-east entrance u.S. Waters strait of
juan de fuca-northern inland waters including the san juan
islands.

Small craft advisory until 5 pm pdt this afternoon for admiralty
inlet-central u.S. Waters strait of juan de fuca-puget
sound and hood canal-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
46118 7 mi106 min 60°F 1004 hPa55°F
CHYW1 - 9449424 - Cherry Point, WA 8 mi59 min 1005.5 hPa
CPMW1 8 mi59 min SE 17 G 23
CPNW1 8 mi89 min SE 12 G 24 60°F
FRDW1 - 9449880 - Friday Harbor, WA 22 mi65 min SSE 9.9 G 20 60°F 52°F1004.8 hPa
PBFW1 - Padilla Bay Reserve, WA 24 mi131 min SSE 16 61°F 1005 hPa53°F
SISW1 - Smith Island, WA 31 mi51 min SSE 31 G 36 60°F 1004.2 hPa (+0.4)51°F
46088 - New Dungeness, WA (Hein Bank) 38 mi51 min SSE 14 G 18 55°F 51°F3 ft1003.4 hPa (+1.1)52°F
PTWW1 - 9444900 - Port Townsend, WA 45 mi59 min ESE 18 G 25

Wind History for Cherry Point South Dock, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bellingham, Bellingham International Airport, WA9 mi1.8 hrsSE 18 G 3310.00 miOvercast and Breezy64°F48°F56%1005.5 hPa
Eastsound, Orcas Island Airport, WA11 mi66 minS 11 G 179.00 miLight Rain61°F53°F77%1004.4 hPa
Friday Harbor Airport, WA24 mi1.8 hrsSSE 14 G 2410.00 miOvercast59°F51°F75%1004.9 hPa

Link to 5 minute data for KBLI

Wind History from BLI (wind in knots)
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Last 24hr--4S5S5--Calm------S12
G21
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--SE10SE11SE14
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SE86SE18
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1 day agoS9
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S8SE12S11--------CalmCalmCalm--CalmCalmCalmCalm--CalmCalmCalmSW3S84--
2 days agoS14
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S10S9----S9S7S7SE4S6S6
G22
S10

Tide / Current Tables for Point Migley, Hale Passage, Washington
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Hale Passage, 0.5 miles SE of Lummi Pt, Washington Current
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Hale Passage
Click for Map
Tue -- 02:38 AM PDT     0.00 knots Slack
Tue -- 05:31 AM PDT     1.17 knots Max Flood
Tue -- 06:50 AM PDT     Sunrise
Tue -- 08:17 AM PDT     -0.00 knots Slack
Tue -- 10:12 AM PDT     Moonset
Tue -- 11:38 AM PDT     -0.83 knots Max Ebb
Tue -- 02:25 PM PDT     0.00 knots Slack
Tue -- 05:38 PM PDT     1.26 knots Max Flood
Tue -- 07:18 PM PDT     Sunset
Tue -- 08:05 PM PDT     -0.00 knots Slack
Tue -- 09:10 PM PDT     Moonrise
Tue -- 11:53 PM PDT     -1.10 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1-0.7-0.30.20.81.11.10.70.2-0.3-0.6-0.8-0.8-0.5-0.20.30.81.21.20.70.1-0.4-0.8-1

Weather Map
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wmap_P
GEOS 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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Seattle, WA (17,4,5,8)
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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.