Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Leavenworth, WA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:56AMSunset 5:33PM Wednesday February 20, 2019 7:58 AM PST (15:58 UTC) Moonrise 7:13PMMoonset 7:57AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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 Am Pst Wed Feb 20 2019
Today..NW wind 10 to 20 kt becoming N 5 to 15 kt in the afternoon. Wind waves 1 to 3 ft. Showers likely in the morning then a chance of showers in the afternoon.
Tonight..N wind 5 to 15 kt becoming 10 to 20 kt after midnight. Wind waves 1 to 3 ft. A slight chance of showers in the evening.
Thu..N wind 5 to 15 kt. Wind waves 2 ft or less.
Thu night..Light wind becoming S 5 to 15 kt after midnight. Wind waves 2 ft or less.
Fri..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri night..SW wind 15 to 25 kt easing to 5 to 15 kt after midnight. Wind waves 2 to 4 ft subsiding to 2 ft or less after midnight.
Sat..S wind 5 to 15 kt. Wind waves 2 ft or less.
Sun..NE wind 5 to 15 kt. Wind waves 2 ft or less.
PZZ100 245 Am Pst Wed Feb 20 2019
Synopsis for the northern and central washington coastal and inland waters..Northerly flow will develop today and then turn more northeasterly tonight and Thursday as high pressure moves over southern british columbia. A frontal system will reach the area on Friday. Northeasterly offshore flow will develop over the weekend.


7 Day Forecast for Marine Location Near Leavenworth, WA
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location: 47.7, -120.91     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 201237
afdotx
area forecast discussion
national weather service spokane wa
437 am pst Wed feb 20 2019

Synopsis
Snow continues across portions of the area today, with moderate to
heavy snow accumulations over southeastern washington and lower
idaho panhandle. Another round of snow is likely by the end of the
week into the weekend as cold temperatures persist.

Discussion
Today: unsettled weather continues across portions of the forecast
area as a shortwave trough drops southeastward just off the
washington coastline. A surface low moved inland over the cascades
overnight, and is tracking eastward along the wa or border. This is
clearly evident on goes16 infrared satellite imagery with a N s
oriented band of cold cloud tops. Elsewhere, light snowfall
continues across much of eastern wa into the central id panhandle.

As is often the case with this type of system, the northern portions
of wa id have quickly dried as the axis of strongest forcing moves
southward, and surface winds become more northerly.

The aforementioned surface low will be the dominant feature
influencing our weather today. Our computer models have not handled
this feature well. As it tracks eastward, it will likely enhance
precipitation along the wa id palouse, the blue mountains, the
lewis-clark valley, and over to the camas prairie. A few more
inches of snow are expected in these locations. Wraparound showers
may bring some snow to the columbia basin from moses lake
eastward, but confidence is low in this. We should also see
widespread precipitation taper off across northeast wa and
northern id today into tonight, though a few spotty, light snow
showers will continue to be possible.

Thursday: mainly dry weather is expected on Thursday, with the exception
of a few linger snow showers over the blue mountains and the
camas prairie. Some north to northeast breezes are likely,
particularly down the okanogan valley, portions of northern idaho,
and the columbia basin. While not strong, these winds may be
enough to cause a bit of drifting snow since this most recent
snowfall was of the light and fluffy variety that is easily blown
around.

Skies are likely to clear out during the day Thursday. We should
start to see increasing high cloud cover Thursday night in advance
of the next storm system, but it remains to be seen how much this
will influence our radiative cooling potential. At this stage,
widespread lows in the upper single digits or lower teens appears
likely.

Dang
Friday through Tuesday: next winter weather system to bring snow to
the region drops down from the same cold northwest to southeast
trajectory of approach and exit starting Friday. Lapse rates
increase substantially behind the frontal feature as it moves
through and there is an expectation that additional smaller scale
features dropping down in the continued northwest flow may utilize
the instability to produce snow showers at times through the
weekend, especially over the more orographically favored areas.

Monday the northerly flow continues but the offshore ridge is
flopped into western canada with enough of a tilt to suggest not
much in the way of significant disturbances should drop down hence a
trend towards a dry forecast with considerably less cloud cover, yet
still quite cold with continued below average temperatures lingering
due to this persistent cold northerly flow. Models still suggest
this trend continuing into Tuesday but with the latest gfs
suggesting a low pressure system forming off the oregon coast
attempts to sweep a snow producing frontal zone within close
proximity to the southeast washington border. Pelatti

Aviation
12z tafs: weather system is slowly moving south and east across
the area. The precipitation will mainly focus on kpuw-klws today.

Kgeg-ksff-kcoe: heaviest snow has moved south and east, but light
snow showers will continue to be possible through the morning.

Look for MVFR with occasional ifr conditions to improve to mainly
vfr by 18z. Northeast winds up to around 10 kt.

Kpuw-klws: periods of snow will persist through much of the day,
with continued MVFR ifr conditions. Snow will slowly diminish
after 00z, though low clouds and fog may persist at kpuw tonight.

Kmwh-keat: MVFR conditions this morning with a few nearby snow
showers. These showers will diminish through the day, with
ceilings slowly lifting toVFR levels. Winds at kmwh to remain
north at 5-15 kt today.

Dang

Preliminary point temps pops
Spokane 29 15 29 12 27 22 20 10 0 0 30 50
coeur d'alene 31 16 30 13 27 24 20 10 0 0 30 70
pullman 29 16 28 12 28 24 90 40 10 0 10 60
lewiston 34 23 32 16 34 29 100 30 10 0 10 50
colville 35 15 36 14 32 17 20 10 0 10 50 60
sandpoint 31 18 30 15 28 25 20 10 0 0 50 70
kellogg 31 16 30 13 29 25 60 10 0 0 30 70
moses lake 31 19 32 17 29 18 40 10 0 0 20 30
wenatchee 31 19 32 17 28 19 30 10 0 0 40 50
omak 32 18 32 17 27 20 20 10 10 0 40 40

Otx watches warnings advisories
Id... Winter weather advisory until 4 pm pst this afternoon for
central panhandle mountains.

Winter storm warning until 4 pm pst this afternoon for lewis and
southern nez perce counties.

Winter storm warning until 4 pm pst this afternoon for lewiston
area.

Winter storm warning until 4 pm pst this afternoon for idaho
palouse.

Wa... Winter storm warning until 4 pm pst this afternoon for lower
garfield and asotin counties.

Winter storm warning until 4 pm pst this afternoon for
washington palouse.

Winter weather advisory until 10 am pst this morning for upper
columbia basin.

Winter storm warning until 4 pm pst this afternoon for northeast
blue mountains.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
WPOW1 - West Point, WA 81 mi59 min NE 8 G 9.9 39°F 1011.1 hPa (+0.0)34°F
TCMW1 - 9446482 - Tacoma Met, WA 85 mi47 min SE 4.1 G 4.1

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Stampede Pass, WA36 mi2 hrsVar 40.25 miLight Snow Freezing Fog26°F23°F88%1007.1 hPa

Wind History from SMP (wind in knots)
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Last 24hrNW9
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66W746553544654W544543
1 day agoSW4343554466554536NW7W7W7
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2 days ago344556W655554W544CalmCalm3333W3SW3W4

Tide / Current Tables for Marysville, Quilceda Creek, Washington
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Marysville
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Wed -- 05:59 AM PST     12.32 feet High Tide
Wed -- 07:06 AM PST     Sunrise
Wed -- 08:02 AM PST     Moonset
Wed -- 12:03 PM PST     4.10 feet Low Tide
Wed -- 05:06 PM PST     10.70 feet High Tide
Wed -- 05:38 PM PST     Sunset
Wed -- 07:18 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.30.63.56.89.711.712.311.810.48.46.34.74.14.76.28.29.910.710.38.96.84.31.7-0.2

Tide / Current Tables for Everett, Washington
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Everett
Click for Map
Wed -- 05:50 AM PST     12.71 feet High Tide
Wed -- 07:06 AM PST     Sunrise
Wed -- 08:02 AM PST     Moonset
Wed -- 11:33 AM PST     4.56 feet Low Tide
Wed -- 04:57 PM PST     11.04 feet High Tide
Wed -- 05:39 PM PST     Sunset
Wed -- 07:18 PM PST     Moonrise
Wed -- 11:34 PM PST     -1.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.81.64.77.910.612.312.71210.38.164.74.75.77.39.110.51110.48.76.23.40.7-0.9

Weather Map and Satellite Images
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wmap_P
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 Spokane, WA (10,2,3,4)
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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.