Saturday, November18, 2017 L-36.com


Marine Weather and Tides
Skykomish, 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 7:10AMSunset 4:22PM Saturday November 18, 2017 5:24 PM PST (01:24 UTC) Moonrise 7:10AMMoonset 5:04PM Illumination 0% Phase: New Moon; Moon at 0 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- 304 Pm Pst Sat Nov 18 2017
.small craft advisory in effect from 9 pm pst this evening through late tonight...
.gale warning in effect from Sunday morning through Sunday afternoon...
Tonight..S wind 10 to 20 kt rising to 15 to 25 kt late this evening. Wind waves 2 to 4 ft.
Sun..S wind 20 to 30 kt rising to 25 to 35 kt in the afternoon. Wind waves 4 to 6 ft. A slight chance of rain in the morning then rain in the afternoon.
Sun night..S wind 15 to 25 kt becoming sw 5 to 15 kt after midnight. Wind waves 2 to 4 ft subsiding to 2 ft or less after midnight. Rain in the evening then rain likely after midnight.
Mon..Light wind. Wind waves less than 1 ft.
Mon night..Light wind. Wind waves less than 1 ft.
Tue..SE wind to 10 kt becoming S in the afternoon. Wind waves 1 ft or less.
Tue night..S wind 10 to 20 kt becoming 5 to 15 kt after midnight. Wind waves 1 to 3 ft.
Wed..S wind 10 to 20 kt. Wind waves 1 to 3 ft.
Thu..S wind 10 to 20 kt rising to 15 to 25 kt. Wind waves 2 to 4 ft.
PZZ100 304 Pm Pst Sat Nov 18 2017
Synopsis for the northern and central washington coastal and inland waters..A cold front will move southeast along the british columbia coast through tonight, then move southward through the washington waters on Sunday. The front will be preceded by increasing south to southeast wind, with gales expected over all waters except the central strait. A high pressure center will pass across the waters on Monday. A strong warm front will push northward through the waters on Tuesday. A strong low pressure center should move north well offshore to near haida gwaii late Wednesday.

7 Day Forecast for Marine Location Near Skykomish, WA
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location: 47.78, -121.05     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 190015
afdotx
area forecast discussion... Resent
national weather service spokane wa
issued by national weather service pendleton or
414 pm pst Sat nov 18 2017

Significant snows possible Sunday night and Monday for the
mountains of the east slopes north cascades, northeast washington,
and north idaho...

Short term Tonight through Sunday: weak ridging allows for a
return of fog and low clouds in the usual locations, otherwise
the next storm system signals its approach with middle and high
clouds streaming in from the west that thicken and lower. Initial
pops and light QPF are painted over the cascades and northern
mountains of eastern washington and north idaho Sunday afternoon
generally to the north and west of a line drawn from wenatchee to
deer park with the bulk of the precipitation expected to fall from
this storm system in the Sunday night Monday time interval.

Sunday night through Monday... Low pressure system tapped into a
well maintained feed of subtropical moisture sags through eastern
washington and north idaho. Some cold air trapped in the northern
valleys may initially be overrun by the warm southerly surge of
moisture associated with the system passage Sunday night into
Monday morning, but that will be the exception with remaining
locations having snow levels high enough in the 3-6 thousand foot
msl range to limit heavy snow accumulation late Sunday and Sunday
night to the east slopes of the north cascades and Sunday night
into Monday for the mountains of north idaho and some of the
northeast mountains of eastern washington with the expectation
that the weather system will take a northwest to southeast
oriented path of exit out of north idaho. Snow totals between late
Sunday afternoon through early Monday would generally range from
6 to 10 inches at mainly 3500-4000 feet in the north cascades.

This is marginal for a winter weather advisory for snow, thus
given the relatively thin layer of the highest snow totals, will
not issue an advisory at this time. Moderate to heavy snow is
also expected over extreme northeast washington and the northern
idaho panhandle. Initially snow could fall as low as 3500-4000
feet over northeast washington and north idaho but these levels
will steadily rise as the warm front nudges snow levels to around
5500 feet by midday Monday along the i90 corridor and points
south. By the time things wind down Sunday afternoon and evening
we could be looking at 5 to 10 inches of snow with the heaviest
amounts north of sandpoint and colville. These amounts are close
to winter storm warning criteria but we will wait on that for
another forecast or two since thats still a way out time wise. The
majority of the remaining non mountain locations will receive a
prolonged interval of rain from this passing system. With all the
warm air advection taking place as the wet weather system moves
through forecast temperatures will be on the warm side of what
would be considered normal for this time of year.

Long term Monday night through Saturday: a well maintained plume
of subtropical moisture sandwiched between a large area of low
pressure off the coast and inland ridging sets up the stage for
low pressure systems to utilize the efficient moisture source as
they pass through eastern washington and northern idaho with a
warm south to north trajectory of approach exit. What appears to
be a wet warm front moves through the region Monday night into
Tuesday with the warm sector moving very slowly eastward. So slow
in fact that continued rainfall associated with high snow levels
running generally between seven to ten thousand feet mean sea
level are coupled with the warmest temperatures of the seven day
forecast from Tuesday night through Thursday. The rain and the
resulting mountain runoff will result in higher streamflow
Wednesday and Thursday but since there is enough snow in the
mountains to absorb a significant quantity of the runoff it should
only result in a slight bump in streamflow increase with no
mainstem river flooding anticipated. The backside of what is left
of the baroclinic band moisture plume passes through as a cold
front Thursday night and allows for a change of air mass to a
cold conditionally unstable one on the north side of the jet
stream Friday and Saturday. This allows for most lowland locations
to see a return of colder but drier weather with any pops limited
to the higher terrain within close proximity of the lee of the
washington cascades and portions of the north idaho panhandle.

Aviation 00z tafs: a flat ridge will persist through Sunday
with abundant mid and high level clouds passing through the
region. Dc

Preliminary point temps pops
Spokane 30 44 36 45 35 45 0 10 90 30 60 80
coeur d'alene 31 43 35 42 34 44 0 10 90 50 50 80
pullman 33 47 36 46 38 49 0 10 100 70 60 80
lewiston 32 50 40 51 40 53 0 0 80 70 50 70
colville 28 40 33 42 32 41 0 30 90 30 40 80
sandpoint 28 41 34 39 30 42 0 10 100 60 50 90
kellogg 27 42 32 39 34 41 0 10 100 80 60 80
moses lake 29 47 35 49 31 46 0 10 60 10 30 80
wenatchee 31 44 33 46 33 43 0 20 60 10 30 80
omak 30 40 31 43 33 43 10 30 60 10 20 70

Otx watches warnings advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 74 mi85 min S 8 G 8 50°F 1021.4 hPa (-1.2)40°F

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stampede Pass, WA37 mi29 minN 010.00 miFair31°F30°F96%1021.6 hPa

Wind History from SMP (wind in knots)
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Last 24hr6SW11
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SW84343CalmCalmCalmCalmCalmCalmN4344433Calm
1 day ago------------------------------------------SW8
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2 days ago------------------------------------------------

Tide / Current Tables for Marysville, Quilceda Creek, Washington
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Marysville
Click for Map
Sat -- 03:42 AM PST     New Moon
Sat -- 05:35 AM PST     10.61 feet High Tide
Sat -- 07:15 AM PST     Moonrise
Sat -- 07:20 AM PST     Sunrise
Sat -- 11:17 AM PST     5.35 feet Low Tide
Sat -- 04:07 PM PST     10.26 feet High Tide
Sat -- 04:27 PM PST     Sunset
Sat -- 05:08 PM PST     Moonset
Sat -- 11:19 PM PST     -0.80 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.42.55.17.69.510.510.59.98.77.265.45.66.68.19.610.39.98.86.94.62.20.3-0.7

Tide / Current Tables for Everett, Washington
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Everett
Click for Map
Sat -- 03:42 AM PST     New Moon
Sat -- 05:27 AM PST     10.83 feet High Tide
Sat -- 07:14 AM PST     Moonrise
Sat -- 07:20 AM PST     Sunrise
Sat -- 10:47 AM PST     5.95 feet Low Tide
Sat -- 03:59 PM PST     10.48 feet High Tide
Sat -- 04:27 PM PST     Sunset
Sat -- 05:09 PM PST     Moonset
Sat -- 10:49 PM PST     -0.89 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.13.468.31010.810.7108.77.26.266.57.68.91010.5108.66.43.81.3-0.4-0.9

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 Spokane, WA (20,4,5,8)
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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.