Tuesday, October15, 2019 L-36.com


Marine Weather and Tides
Moscow, ID

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
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 7:04AMSunset 6:03PM Tuesday October 15, 2019 5:05 AM PDT (12:05 UTC) Moonrise 7:19PMMoonset 8:44AM Illumination 97% 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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7 Day Forecast for Marine Location Near Moscow, ID
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location: 46.73, -117     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 151159
afdotx
area forecast discussion
national weather service spokane wa
459 am pdt Tue oct 15 2019

Synopsis
Dry weather conditions continue today. An active weather pattern
returns Wednesday into the weekend bringing several rounds of
rain, mountain snow, and breezy winds. Seasonal temperatures the
next few days will trend cooler than normal by the weekend.

Discussion
Tuesday through Thursday morning: high pressure which had brought
our brief period of mostly clear skies and dry weather across the
inland northwest will begin to shift east during this period.

This will open the way for a series of upper waves to move into
the region and increase the chances of lower elevation showers and
high mountain snow. By late Tuesday evening into Wednesday
morning, the first wave will transport a decent fetch of moisture
and precipitation into the northern cascades in the broad
southwest upper flow increasing across the pacnw. As the cold
frontal boundary moves into the cwa, showers will spread into
eastern washington and the northern panhandle. Measurable
precipitation will be on the light side across most areas possibly
accounting for only about 0.01 to 0.04 inches with some mountain
areas across the northern cascades seeing as much as a half inch
of precipitation. As the system pushes east into the northern
panhandle, some mountain locations could see .10 to .20 inches of
measurable precip with southern shoshone county seeing almost .30
inches of rainfall. Snow levels will initially be high across the
cascades varying 7000' to 8000' so there should be no impact on
mountain passes into Wednesday. By overnight Wednesday, however,
cooler air will move into the cascades lowering snow levels to
around 5000'. With the higher snow levels, snow amounts will be
light with the northern cascades seeing an additional 2 to 4
inches at the highest elevations. By Thursday morning, northern
idaho panhandle mountains should see an inch or two of new snow as
well .

Tuesday still looks to be a bit warmer with high temperatures in
the upper 50s to upper 60s. Highs on Wednesday should be the
highest ranging in the 60s with l-c valley seeing highs topping in
the low 70s. But these values in general will remain within
seasonal averages for most locations except for the lewiston area
where highs will be at least 5-10 degrees above average. Aky
Thursday through Saturday: an active autumn weather pattern is on tap
as a strong pacific jet sends a series of weather systems through
the pac nw. Models have been in good agreement for several days
advertising the upcoming wet and windy pattern and confidence is
above normal. What is less certain is exact strength and timing of
each shortwave passing through. At this time, it looks like there
will be at least three distinct waves to focus on.

The first shortwave traverses the northwest on Thursday. The leading
cold front will be well into montana by the morning hours but the
cool unstable air mass within the trough coupled with numerous
small scale vorticity lobes and orographics will result in a
chaotic and widely scattered showery day. Heaviest concentration
of showers will focus on the west, windward slopes of the cascade,
cascade crest, and idaho panhandle. Snow levels on Thursday will
be on the order of 5000-6000 feet. We will lose ties to the deeper
moisture on Thursday and QPF amounts will be generally be under a
quarter of an inch with less than a tenth of an inch in the lee
of the cascades. The exception to this will be locally heavier
amounts along the immediate cascade crest and camas prairie where
rainfall amounts go be closer to half an inch.

Thursday's shortwave will carve out a broad upper-level trough across
much of the northern tier of the us and we should see a second
shortwave sometime int eh Thursday night to Friday morning time-
frame. This will be a relatively cooler but not as moist air mass
will shower concentration once again focused along the cascade
crest and idaho panhandle but also expanding into the basin when
the shortwave dynamics swing trough. Snow levels will start to
lower some falling closer to 4500-5500 feet which could result in
some snow for the cascade and highway 20 passes. Showers on Friday
will likely retreat to the mountains with relatively drier
weather in the basin. 48 hour snow amounts on the higher peaks
above 5500-6000 feet of the cascades will be on the order of 1-3
feet.

The last disturbance dropping into the region arrives on Saturday and
has the potential to be the wettest of this forecast period.

While the large scale upper-level dynamics look to skirt just
south of washington, there are signs within the ensemble means of
a more organized surface-850mb low and precipitation bands. This
will also be the coolest of the three storm systems and bring a
decent shot for snow on the area mountain passes and mix of
rain snow down to 2000 feet for the northern valleys of and
possibly northern and eastern reaches of the columbia basin
including the spokane-cd'a area and palouse. The forecast will
likely waver in the coming days so confidence remains low
regarding details for any low-elevation snow potential.

Each system will deliver breezy to locally windy conditions, especially
across the columbia basin and palouse. At this time, it looks
like sustained speeds in these wind prone locations will be on the
order of 10-20 mph with gusts in the 25-35 mph range. Local gusts
to 45 mph are not out of the question but carry lower confidence
for exact timing placement.

Sunday through Tuesday: a ridge will amplify over the ERN pac and
expand into the pac nw. This will push the storm track northward
toward extreme southern bc. There is good agreement amongst the
ensemble models of rising heights and warming of the air mass.

Precipitation chances, on the other hand, carry more uncertainty.

The forecast is heavily weighted toward ensemble means which
resembles a flatter, dirty ridge with an abundance of cloudiness
and light precipitation. If the ridge axis were to setup further
east... A dry forecast would be in store but not seeing a whole lot
of guidance supporting that idea at this time. Also seeing a deep
plume of subtropical moisture inland topping the ridge which
increases my confidence for continued precipitation chances. Sb

Aviation
12z tafs: satellite imagery notes some fog development in northern
idaho panhandle valleys to include the purcell trench. Mvrf
conditions in fog are currently reported at sff and possibly
dropping to ifr through 1600z. There remains a slight risk for fog
formation at geg and coe this morning but confidence is low.

After late morning, TAF sites are expected to beVFR through the
remainder of the forecast period. An increasing southwest upper
flow will bring a thickening of mid and high level clouds from the
west this afternoon ahead of the next system expected Wednesday. Aky

Preliminary point temps pops
Spokane 59 40 62 42 56 39 0 0 20 60 20 50
coeur d'alene 59 41 64 44 53 39 0 0 10 70 40 70
pullman 62 44 65 42 55 39 0 0 10 70 30 50
lewiston 69 50 72 51 61 44 0 0 10 70 20 40
colville 60 35 62 38 57 36 10 0 30 60 30 60
sandpoint 57 40 61 44 52 39 0 0 10 80 60 80
kellogg 59 44 64 44 51 39 0 0 0 80 70 80
moses lake 61 39 59 40 63 40 10 0 30 50 10 30
wenatchee 58 43 57 43 58 41 10 10 50 70 20 40
omak 57 41 56 41 58 37 20 10 50 70 30 50

Otx watches warnings advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pullman / Moscow Regional Airport, WA7 mi72 minE 910.00 miFair41°F33°F73%1020.6 hPa
Lewiston, Lewiston-Nez Perce County Airport, ID24 mi69 minESE 710.00 miFair42°F35°F76%1020.4 hPa

Link to 5 minute data for KPUW

Wind History from PUW (wind in knots)
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Last 24hrCalmW3CalmCalmW7SW9W9
G18
SW7W3SW4W4--N3CalmCalmCalmCalmE33----E12E9E12
1 day agoE7E10SW3E5E5S5SW7W7W63NW3W4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoE10E10E11E11E11E7S7--SE6CalmS4CalmCalmCalmCalmCalmCalmSE4CalmNE5SW3CalmCalmE9

Tide / Current Tables for
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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Spokane, WA (8,2,3,4)
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Ground Weather Radar Station Spokane, 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.