Friday, January19, 2018 L-36.com


Marine Weather and Tides
Marietta-Alderwood, 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 7:52AMSunset 4:49PM Thursday January 18, 2018 9:52 PM PST (05:52 UTC) Moonrise 8:51AMMoonset 6:39PM Illumination 6% Phase: Waxing Crescent; Moon at 2 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- 847 Pm Pst Thu Jan 18 2018
.small craft advisory in effect through late Friday night...
Tonight..SE wind 20 to 30 kt. Wind waves 3 to 5 ft. A chance of showers.
Fri..SE wind 20 to 30 kt easing to 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. A chance of showers.
Fri night..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Showers likely.
Sat..SW wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sat night..SE wind 10 to 20 kt rising to 25 to 35 kt after midnight. Wind waves 1 to 3 ft building to 4 to 6 ft.
Sun..SE wind 25 to 35 kt. Wind waves 4 to 6 ft.
Sun night..S wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft.
Mon..SW wind 10 to 20 kt becoming S 5 to 15 kt. Wind waves 1 to 3 ft.
Tue..SE wind 10 to 20 kt rising to 15 to 25 kt. Wind waves 2 to 4 ft.
PZZ100 847 Pm Pst Thu Jan 18 2018
Synopsis for the northern and central washington coastal and inland waters..A deep low centered near 50n 134w will slowly fill as it moves toward the northern tip of vancouver island through Friday night. Pressure gradients will remain rather tight through Friday night and will result in small craft advisory conditions across the waters. Seas over the coastal waters will slowly subside through Friday night. Additional fronts will reach the waters later Saturday through early next week.

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 190545
afdsew
area forecast discussion
national weather service seattle wa
900 pm pst Thu jan 18 2018

Synopsis Large waves at the coast will gradually subside tonight
and Friday. An upper trough over the region will maintain cool and
showery pattern through Friday. Snow showers above 2500 feet could
produce a few inches of snow in the passes tonight and again Friday
night. Additional fronts will bring periods of steadier and more
widespread rain Sunday and Tuesday or Tuesday night.

Short term Ir satellite imagery shows cold top cumulus streaming
into western washington this evening indicative of an unstable and
showery air mass. Radar is showing fairly widespread shower
activity, especially over the mountains, coast inland across puget
sound. Partial shadowing off the olympics is limiting showers around
the east entrance to the strait. The 00z freezing level at forks was
3600 feet which indicates snow levels are already down to around
2500 feet. This is below the cascade passes where most precipitation
will fall. Stevens pass had 2 or 3 inches early this evening with
the -33c cold pool aloft providing large liquid snow ratios. The
flow is not very strong and instability alone is not likely to
produce advisory amounts of snow in the mountains but it is possible
elevations above the passes could see localized amounts up to 6
inches overnight. Overall, the showers will be decreasing later
tonight, so no advisory will be issued.

There were a few lightning strikes at the coast this past hour
associated with squall lines. Generally these cells or squalls will
produce locally heavy rain, and gusty winds mainly at the coast.

There was one report of ice pellets or hail near sheridan beach but
no other reports noted.

Another embedded short waves will move across late Friday and Friday
night. Models suggest some localized snow amounts could again flirt
with advisory criteria. Will let the next shift decide on if this is
needed. The showery pattern will produce some accumulation in the
passes, with heaviest amounts possibly near stevens pass and also
the volcanos. Just plain showers in the lowlands.

Showers will tapper off Saturday but temperatures will remain cool.

Pops may be a bit high with latest models showing mostly dry
conditions Saturday afternoon. Mercer
update for high surf along the coastline... Have diminished to 23 to
25 feet with a dominant period of 16 seconds this evening and will
continue to slowly diminish tonight through Friday. With the
afternoon high tide behind us and seas slowly subsiding, the coastal
flood warning is being converted to a high surf advisory for the
rest of tonight until noon Friday. Albrecht

Long term Monday will be a showery day in the wake of the
Sunday front with an upper trough over the area. An upper ridge
will briefly cross the area Monday night and early Tuesday for
perhaps a dry spell.

The next in a series of fronts will spread rain into the area
later Tuesday. An upper trough will keep things showery and cool
Wednesday. Some showers will linger into Thursday but they should
be decreasing as the upper trough shifts inland. Snow levels could
get down to low enough for some chunky rain on the higher hills
Thursday morning. Schneider

Aviation A deep low pressure system centered near 50n 134w will
slowly fill as it moves eastward tonight and Friday. The upper
level trough associated with this low will move into western
washington Friday evening. Strong southwest flow aloft will
gradually ease and turn westerly Friday evening. The air mass is
moist and somewhat unstable.

Conditions are generallyVFR across the region with pockets of
MVFR ceilings in showers. ExpectVFR conditions with MVFR
conditions at times around showers to continue through the day
Friday. Conditions will deteriorate to ifr to low end MVFR Friday
evening as the upper level trough offshore moves inland. Albrecht
ksea... MainlyVFR conditions with showers at times through Friday.

Conditions deteriorating to low end MVFR Friday evening. South
winds 10-14 knots through Friday. Albrecht

Marine A deep low centered near 50n 134w will slowly fill as it
moves east toward the queen charlotte sound through late Friday.

While conditions will gradually improve, pressure gradients will
be tight enough to result in small craft advisory wind conditions
over most of the waters through Friday, and seas will remain
quite hazardous through at least Friday night.

A strong front will move through the waters late Saturday night
into Sunday morning. This front will bring another round of gale
force winds to the coastal waters and to portions of the inland
waters. The active weather pattern will continue through at least
the middle of next week. Albrecht

Hydrology Heavy rain from a frontal system could cause minor
flooding on the skokomish river in mason county later Sunday or
Sunday night. Otherwise, river flooding is not expected for the
next 7 days.

Sew watches warnings advisories
Wa... High surf advisory until noon pst Friday for central coast-north
coast.

Pz... Small craft advisory until 6 am pst Saturday 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-puget sound and hood canal-west entrance u.S.

Waters strait of juan de fuca.

Small craft advisory for rough bar until 6 am pst Saturday for
grays harbor bar.

Small craft advisory until midnight pst Friday night for
admiralty inlet.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHYW1 - 9449424 - Cherry Point, WA 8 mi53 min SE 16 G 23 45°F 1006.5 hPa (+1.3)
CPMW1 8 mi53 min SSE 20 G 25 45°F 46°F
FRDW1 - 9449880 - Friday Harbor, WA 22 mi77 min SE 6 G 8 43°F 47°F1007.3 hPa
PBFW1 - Padilla Bay Reserve, WA 24 mi83 min S 15 44°F 1007 hPa40°F
SISW1 - Smith Island, WA 31 mi53 min SE 24 G 26 44°F 1006.8 hPa (+0.9)
46088 - New Dungeness, WA (Hein Bank) 38 mi63 min SE 12 G 14 45°F 46°F2 ft1006.6 hPa (+0.5)39°F
PTWW1 - 9444900 - Port Townsend, WA 45 mi53 min SE 11 G 19 44°F 47°F1007.6 hPa (+0.7)

Wind History for Cherry Point South Dock, WA
(wind in knots)    EDIT      (on/off)   Help
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SE13
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SE26
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SE20
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bellingham, Bellingham International Airport, WA9 mi60 minSSE 16 G 2210.00 miOvercast46°F37°F73%1007.9 hPa
Eastsound, Orcas Island Airport, WA11 mi58 minS 12 G 1810.00 miOvercast45°F39°F81%1006.8 hPa
Friday Harbor Airport, WA24 mi60 minSE 1210.00 miMostly Cloudy43°F37°F80%1007.3 hPa

Wind History from BLI (wind in knots)
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Last 24hrS19
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1 day agoE6
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N5N7NE7CalmN4E3SE15
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2 days agoCalmCalmN6N4--SE15SE20
G29
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SE10
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SE12SE16
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SE11SE10SE7E7

Tide / Current Tables for Point Migley, Hale Passage, Washington
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Point Migley
Click for Map
Fri -- 07:45 AM PST     9.23 feet High Tide
Fri -- 07:55 AM PST     Sunrise
Fri -- 09:21 AM PST     Moonrise
Fri -- 12:46 PM PST     6.10 feet Low Tide
Fri -- 04:48 PM PST     Sunset
Fri -- 05:38 PM PST     7.40 feet High Tide
Fri -- 07:42 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.601.32.94.76.58.199.28.77.86.96.26.16.36.677.37.46.85.63.820.5

Tide / Current Tables for Hale Passage, 0.5 miles SE of Lummi Pt, Washington Current
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Hale Passage
Click for Map
Fri -- 12:44 AM PST     0.00 knots Slack
Fri -- 04:18 AM PST     2.12 knots Max Flood
Fri -- 07:51 AM PST     Sunrise
Fri -- 08:16 AM PST     -0.00 knots Slack
Fri -- 09:18 AM PST     Moonrise
Fri -- 10:56 AM PST     -0.75 knots Max Ebb
Fri -- 02:17 PM PST     0.00 knots Slack
Fri -- 04:07 PM PST     0.31 knots Max Flood
Fri -- 04:51 PM PST     Sunset
Fri -- 05:11 PM PST     -0.00 knots Slack
Fri -- 07:44 PM PST     Moonset
Fri -- 10:08 PM PST     -1.21 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.40.21.11.82.121.710.2-0.3-0.6-0.8-0.6-0.4-0.10.20.30.1-0.2-0.5-0.8-1.1-1.2-1.1

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 (0,6,7,8)
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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.