Wednesday, March22, 2017 L-36.com


Marine Weather and Tides
Skykomish, WA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:55AMSunset 7:19PM Wednesday March 22, 2017 5:27 PM PDT (00:27 UTC) Moonrise 3:03AMMoonset 12:32PM Illumination 22% Phase: Waning Crescent; Moon at 25 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- 245 Pm Pdt Wed Mar 22 2017
.small craft advisory in effect through Thursday morning...
Tonight..SW wind 15 to 25 kt becoming S 10 to 20 kt before midnight. Wind waves 1 to 4 ft. A chance of showers.
Thu..S wind 10 to 20 kt. Wind waves 1 to 3 ft. A slight chance of rain in the afternoon.
Thu night..S wind 10 to 20 kt. Wind waves 1 to 3 ft. Rain.
Fri..S wind 5 to 15 kt becoming 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Fri night..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sat..S wind to 10 kt becoming sw in the afternoon. Wind waves 1 ft or less.
Sat night..NW wind to 10 kt in the evening becoming light. Wind waves 1 ft or less.
Sun..Light wind becoming sw to 10 kt. Wind waves 1 ft or less.
Mon..S wind to 10 kt becoming nw. Wind waves 1 ft or less.
PZZ100 245 Pm Pdt Wed Mar 22 2017
Synopsis for the northern and central washington coastal and inland waters..A surface trough along the coast will move inland this evening. Associated strong low level onshore flow should ease. A pacific frontal system is expected to move onshore Thursday night will potential gale force winds along the coast. Weak higher pres is forecast to build over the region Saturday. The next pacific frontal system is expected to move through the region Sunday night.

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 222352
afdotx
area forecast discussion
national weather service spokane wa
452 pm pdt Wed mar 22 2017

Synopsis Showers and a few isolated thunderstorms will be
possible today. A few isolated mountain showers will be possible
for Thursday, otherwise it will be dry. Then another storm system
will bring widespread rain and mountain snow Friday. Flooding
issues will persist through much of the week in the absence of a
prolonged period of dry weather. The weather will remain unruly
through the first part of next week as a couple more storm systems
are expected to track through the region.

Discussion
Tonight through Friday night... Radar and satellite imagery show a
blossoming CU field and associated convective showers over far
eastern washington and the central idaho panhandle this afternoon.

Brief downpours, small hail, potentially gusty winds and perhaps
isolated lightning strikes would be the main threats. Short range
guidance indicate this activity could continue into the early to
mid evening hours before decreasing overnight as the cold front
clears the area. Once the showers clear out tonight, most areas
will see a brief break from the precipitation for Thursday as a
flat ridge of high pressure builds in.

By Thursday evening/night, our next upper level low and associated
occluded frontal boundary approaches the coast. This will bring
widespread precipitation to the region Thursday night through
Friday, before the focus shifts to far eastern washington and the
idaho panhandle by Friday night for continued showery conditions.

Pwat values will rebound to the 90th percentile with this system
with 24 hour rainfall totals generally in the 0.25 to 0.5 inch
range, and slightly lower amounts in the immediate lee of the
cascades. Pockets of over 0.5 inch are indicated by most models,
but as to where these areas will end up are still uncertain. Snow
levels will start low enough Friday morning to allow for some wet
snow to mix in across the northern valleys before rising above
4000 feet by the afternoon. Temperatures will generally fall a
degree or two below their seasonal normals for this period. /kalin
Saturday through Wednesday... For this time of the year the models
are in pretty good agreement through Sunday night, then begin to
diverge in solutions. Those differences are not uncommon during
the transition from winter to summer. A weakening/splitting upper
level low will scoot through the region Friday night and Saturday
with mainly mountain showers for Saturday and Saturday night. The
next is expected Sunday night and lingers into Tuesday. This where
model solutions begin to diverge, and this portion of the
forecast leans in favor of the gefs/ecmwf means. In between these
systems a ridge of high pressure will track through the region for
a break in the wet and unruly weather.

Saturday and Saturday night... As mentioned above a splitting upper
level low will track through the region. A warm front on Friday
will get pushed east and allow a weak cold front to move from west
to east across the forecast area between 06z and 18z Saturday.

The atmosphere will destabilize enough to support wide spread
showers. Orographic lift will put the focus of the heaviest
showers near the cascades crest and the idaho panhandle. However
with 500mb temps -25c to -30c and lapse rates 6-8c/km most places
outside of the deep basin will have a chance to see showers. We
lose the deep moisture tap from earlier in the week, but with
pwats around 150 percent of normal some of the showers will be
moderate to heavy. Showers will come to a quick end around sunset
as we lose the heating of the day and high pressure quickly builds
into the region from the west. This is not a strong front at all,
but winds should increase out of the southwest from 10-20 mph
with local gusts 25 to 30 mph. Some of the higher elevations could
see 2-4 inches of snow. Otherwise expect a tenth to two tenths of
rain for most places outside of the deep basin
Sunday... Should be a quiet day as the ridge moves through the
region. Some showers will be possible for the cascades and the
panhandle mountains but these should be isolated.

Sunday night through Tuesday... The process starts all over again
as a warm front moves into the region Sunday night and Monday for
a period of stratiform precipitation, followed quickly by a cold
front Monday morning. The upper level low will remain over the
area through Tuesday, so we expect widespread showers for the
mountains and afternoon showers for the remainder of the area.

This storm system is also expected to tap into much deeper pacific
moisture and will result in a better chance for moderate to heavy
showers. Tobin

Aviation
00z tafs: scattered showers with a few embedded thunderstorms will
move into the id panhandle late this afternoon. These showers will
become less numerous in the evening as we lose the surface
heating. The shortwave trough of lower pressure spawning these
showers will move across the region through the evening and a few
showers will continue to be possible ahead of it. Otherwise, we
will see enough clearing at mid levels for low stratus to form
across the spokane-coeur d'alene corridor. Expect ifr/MVFR CIGS to
develop overnight that will continue into Thursday morning. /svh

Hydrology
The main stem rivers have crested but flooding will
persist on the spokane river... Lake coeur d'alene and the st. Joe
river through the middle of next week. As far as the areal flood
warnings... These have been extended until noon Saturday for
ferry... Stevens... Pend oreille... Boundary... Bonner... Shoshone... And
north and far west portions of spokane counties. There remains
several reports of small stream flooding... Field flooding... Lake
flooding... And/or water over roads in these counties. Also
additional mudslides in steep terrain are possible especially
under the heavier showers today... And again on Friday as the next
wet system arrives due to saturated soils. Flood waters are
receding in the community of sprague so the flood warning here
will be cancelled this afternoon. Jw

Preliminary point temps/pops
Spokane 33 48 36 47 37 51 / 40 0 30 100 60 50
coeur d'alene 33 46 33 45 36 49 / 50 0 20 100 80 70
pullman 35 49 37 48 37 50 / 30 0 30 100 70 60
lewiston 37 55 40 54 40 56 / 40 0 30 90 70 60
colville 33 48 34 46 35 50 / 30 0 30 80 50 50
sandpoint 33 45 30 43 34 46 / 60 0 20 90 80 60
kellogg 33 44 32 44 34 45 / 60 10 10 90 90 70
moses lake 32 56 40 54 37 59 / 10 0 40 70 30 10
wenatchee 33 51 36 50 36 54 / 10 0 60 60 30 10
omak 32 51 36 49 36 54 / 10 0 50 70 30 20

Otx watches/warnings/advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
EBSW1 - 9447130 - Seattle, WA 69 mi40 min SSW 14 G 22 51°F 47°F1013.4 hPa
WPOW1 - West Point, WA 74 mi28 min S 24 G 28 49°F 1012.3 hPa (+1.6)44°F
TCNW1 - 9446484 - Tacoma, WA 80 mi46 min 49°F 47°F1014.3 hPa

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from SMP (wind in knots)
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Last 24hr6554CalmE3CalmE3CalmCalmE3CalmCalmE43NE3CalmNE4333354
1 day ago656
G15
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G18
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5E64656NE66NE765654--654
2 days agoCalmCalmCalmCalm33CalmCalmCalm3433655655E86E865

Tide / Current Tables for Marysville, Quilceda Creek, Washington
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Marysville
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Wed -- 02:37 AM PDT     9.32 feet High Tide
Wed -- 04:07 AM PDT     Moonrise
Wed -- 07:06 AM PDT     Sunrise
Wed -- 09:01 AM PDT     6.17 feet Low Tide
Wed -- 01:01 PM PDT     8.11 feet High Tide
Wed -- 01:36 PM PDT     Moonset
Wed -- 07:25 PM PDT     Sunset
Wed -- 08:07 PM PDT     1.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.78.79.29.398.47.56.86.36.26.477.78.17.97.15.94.531.81.31.72.84.4

Tide / Current Tables for Everett, Washington
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Everett
Click for Map
Wed -- 02:29 AM PDT     9.51 feet High Tide
Wed -- 04:07 AM PDT     Moonrise
Wed -- 07:06 AM PDT     Sunrise
Wed -- 08:31 AM PDT     6.87 feet Low Tide
Wed -- 12:53 PM PDT     8.28 feet High Tide
Wed -- 01:36 PM PDT     Moonset
Wed -- 07:25 PM PDT     Sunset
Wed -- 07:37 PM PDT     1.48 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.29.19.59.59.18.57.87.26.96.97.27.68.18.37.975.74.12.61.71.52.23.55.2

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.