Wednesday, November14, 2018 L-36.com


Marine Weather and Tides
Lewiston, ID

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 6:47AMSunset 4:17PM Wednesday November 14, 2018 4:02 PM PST (00:02 UTC) Moonrise 1:41PMMoonset 11:24PM Illumination 44% Phase: First Quarter Moon; Moon at 7 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
    EDIT      (on/off)   Help


7 Day Forecast for Marine Location Near Lewiston, ID
   Hourly   EDIT   Help
location: 46.39, -116.98     debug


Area Discussion for - Spokane, WA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kotx 142338
afdotx
area forecast discussion
national weather service spokane wa
338 pm pst Wed nov 14 2018

Synopsis
Unsettled conditions with mainly mountain showers will continue
through Thursday. On Friday a cold front dropping out of canada
will bring more widespread valley rain and mountain snow showers
and then breezy and raw conditions as temperatures cool behind
the front. The weekend into early next week will be cooler and
dry.

Discussion
Tonight through tomorrow: remnants of the system from today will
continue to produce some isolated rain showers over the cascades
and the idaho panhandle. The showers will mainly be in the higher
terrain and snow showers for elevations above 4000ft. A northwest
zonal flow pattern will begin to push into the region allowing a
drier airmass to provide a brief break between the systems. The
models are in fairly good agreement with this period. The main
impact for columbia basin and valley locations will be the
overnight fog and stratus development. The fog will mainly be
patchy for the columbia basin. The northern valleys could expect
thicker fog development and lower vis restrictions during the
early morning hours. Visibilities will be in the range of one mile
to one half mile creating hazardous travel conditions. Thick
stratus could decrease the potential coverage of the fog.

Overnight temperatures will be slightly warmer than previous
nights reaching into the upper 20s and low 30s for most. Highs for
tomorrow will be in the 40s to low 50s. Jdc
Thursday night and Friday... Models are in pretty good agreement
for this period as well. An upper level short wave currently
forming over the yukon will descend through the forecast area
north to south during the overnight and early morning hours of
Friday. The feed of pacific moisture visible on satellite riding
northwest zonal flow through the forecast area will enhance along
this cold front and promote an increasing intensity of mountain
snow showers... And a frontal band of mainly rain showers over the
columbia basin during the overnight and early morning hours.

Despite the overnight and early morning threat period... A mild air
mass in the basin ahead of the front (todays wave passage has
effectively scrubbed most of the stagnant cool air mass) with
generally slightly above freezing overnight lows bring reasonable
confidence that mainly simple non-freezing rain showers possibly
mixed with some non-accumulating snow will characterize these
low land basin and valley showers. The mountains above 4000 feet
will probably receive 2 to 4 inches of snow accumulation during
this period.

Friday afternoon and Friday night will become increasingly breezy
with north winds ushering a very dry and cool canadian continental
air mass into the region. Breezy and gusty raw conditions will
develop in the okanogan valley and purcell trench beginning in the
afternoon and continuing into Saturday morning as this new air
mass becomes established.

Saturday through Monday models continue to agree on a dry pattern
with an upper level ridge over the forecast area. The low level
air mass will probably be too dry for any fog or low clouds
Saturday... And possibly Sunday as well... But inevitably some
pockets of fog and stratus will begin to be noticeable by Monday
and beyond in the valleys and basin. Frosty overnight low
temperatures and cool daytime highs (about normal for this time of
year) under largely clear skies will characterize this period.

Tuesday and Wednesday... Uncertainty begins to assert itself during
this period with some models loosely hanging onto the ridge for
Tuesday while others shift the axis eastward in preparation for a
more progressive pattern for mid-week. There is guarded confidence
that Tuesday will be continued dry but probably with more
clouds. By Wednesday the latest GFS and ec depict a short wave
passage for a new round of unsettled weather... But these solutions
are either inconsistent with the previous runs (the ecmwf) or
outliers among the ensemble forecast members (gfs). Some moderate
precipitation chances have been introduced for the mountain
regions on Wednesday based on this apparently accidental model
agreement but this is an exceedingly low confidence forecast at
this time. Fugazzi

Aviation
18z: the boundary layer remains decoupled from stronger westerly
winds evident across the east slopes and western basin. The next
few hours will prove whether these winds can mix up the persistent
stratus deck or continue to ride over the dome of cooler air.

Forecast is leaning toward the latter but we have seen a few sun
breaks at times in the cams up the wenatchee river valley
(upstream of keat) so will continue to monitor for potential
amendments. For kgeg-ksff-kcoe... Temperatures are quite warm as
of 00z and with a 15-20 dewpoint depressions, forecast was leaning
away dense fog and more toward stratus as boundary layer winds
increase from 180-210 degrees 10-18z which climatologically favors
stratus. Kpuw klws expected to maintainVFR skies. Forecast
confidence for keat kmwh kgeg ksff kcoe remains low through this
taf period. Sb

Preliminary point temps pops
Spokane 33 44 35 42 25 38 0 10 40 20 0 0
coeur d'alene 33 44 34 42 24 40 10 10 50 30 0 0
pullman 36 49 35 44 28 42 0 0 60 40 0 0
lewiston 39 55 39 49 32 45 0 0 20 40 10 0
colville 30 43 32 43 25 41 0 20 40 10 0 0
sandpoint 32 42 32 41 21 38 10 30 60 10 10 0
kellogg 35 43 34 41 22 37 20 20 80 50 10 0
moses lake 29 47 35 47 25 43 0 10 20 10 0 0
wenatchee 34 49 37 46 29 43 0 10 20 30 0 0
omak 30 46 32 47 23 43 0 10 20 10 0 0

Otx watches warnings advisories
Id... None.

Wa... None.



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lewiston, Lewiston-Nez Perce County Airport, ID2 mi66 minN 010.00 miOvercast51°F30°F46%1026.2 hPa

Wind History from LWS (wind in knots)
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
Last 24hrNW4CalmN7N3NW5W4CalmNW3CalmCalmNW6CalmCalmN4NW3N645SE3NE7Calm3NW5Calm
1 day agoCalmCalmSE5SE3S3CalmS3CalmNE3E4E3CalmCalmE6E7CalmCalmE10W4CalmW4CalmNW3Calm
2 days agoCalmS6SE5S5S3SE3CalmCalmSE3CalmCalmCalmCalmCalmSE3E5E7E74NW4E6CalmW4W3

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Spokane, WA (19,4,5,8)
      (on/off)   Help

Ground Weather Radar Station Spokane, WA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.