Sunday, November18, 2018 L-36.com


Marine Weather and Tides
Oroville, 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 7:14AMSunset 4:13PM Sunday November 18, 2018 8:56 AM PST (16:56 UTC) Moonrise 3:40PMMoonset 2:37AM Illumination 81% Phase: Waxing Gibbous; Moon at 11 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 Oroville, WA
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location: 49.16, -119.25     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 181153
afdotx
area forecast discussion
national weather service spokane wa
353 am pst Sun nov 18 2018

Synopsis
Today will be mostly sunny and seasonably warm. Low land fog and
clouds will likely become more prevalent Monday and Tuesday. The
weather pattern will become wet and unsettled starting Wednesday,
just in time for thanksgiving travel. Snow in the mountains is
expected, possibly impacting cascade mountain pass travel.

Discussion
Today... High pressure remains off the coast with northerly flow
over the inland northwest. Satellite imagery shows some high
level moisture moving over the ridge this morning so some thin
high cirrus was added to the forecast. Expect a chilly start to
the day under a strong inversion. It will take a while to warm up,
but by afternoon there should be mostly sunny skies with high
temperatures in the 40s. The exception will be along the snake,
clearwater, and grand ronde rivers near lewiston where fog has
again developed. The fog in the l-c valley lingered through
Saturday morning before dissipating around noon. I would expect
the same today as well.

Monday and Tuesday... The ridge will begin to slowly move east
Monday and Tuesday with the morning inversion remaining quite
strong. Afternoon mixing will become less each day and this will
allow the low clouds and fog to expand across the columbia basin,
and the palouse tonight, then into the mountain valleys Monday
night. Temperatures will be tricky. In areas that do clear out
highs will be in the 40s, but in areas that remain in the fog
temperatures will have a hard time making it out of the 30s. Winds
will be light and mainly out of the north-northeast. Tobin
Tuesday night through Saturday: ridge of high pressure shows both a
gradual deamplification as well as an eastward migration of its axis
with axis placement over northwest montana which keeps pops on the
dry side with some fog Tuesday night. By Wednesday the ridge axis
placement is far enough east over eastern montana to produce a
favored southwest to northeast trajectory of approach for weather
disturbances. Included in this scenario is an
elongating weakening splitting trof that moves through the region
Wednesday Thursday and is marked with minor pops coupled with
light QPF and snow amounts for now as the energy and moisture
associated with it stays mostly well to the south of the pacific
northwest. From late in the day Thursday and beyond there is
considerable uncertainty with shortwave timing but models infer
the jet stream is much closer, if not overhead or the south of
eastern washington and north idaho at times going into next
weekend. Will attempt to stick with the superblend solution for
this portion of the forecast with low confidence and for now will
leave the high pops Thursday coupled with gusty brisk winds
Thursday night Friday suggested by past GFS runs depiction of a
better maintained synoptic scale weather system passage followed
up with a cold front passage and displacement of jet stream to the
south of the forecast area. Pelatti

Aviation
12z tafs: some high thin cirrus will move through the region this
morning, otherwise a dry air mass will result inVFR conditions
and light northerly winds at the majority of TAF sites through 12z
Monday. Some fog stratus has been developing along the spokane
river and along the snake river. At klws the CIGS vsby have been
bouncing around fromVFR MVFR to ifr lifr through the night. It is
now lifr and if Saturday was any indication that site will not
mix out until 20-21z, but then conditions will improve toVFR
through about 06z until the fog and low clouds re-develop. The
other area of concern is at ksff where there will be the potential
for some fog development around sunrise for an hour or two, but
confidence is not very high for now. There may be a better chance
of fog development after 06z for TAF sites near water sources
kgeg ksff kcoe and keat. Tobin

Preliminary point temps pops
Spokane 41 26 43 25 43 27 0 0 0 0 0 0
coeur d'alene 42 26 45 25 46 26 0 0 0 0 0 0
pullman 45 27 47 28 48 30 0 0 0 0 0 0
lewiston 43 29 49 29 49 31 0 0 0 0 0 0
colville 43 25 44 25 42 27 0 0 0 0 0 0
sandpoint 40 26 43 25 45 25 0 0 0 0 0 0
kellogg 41 28 46 28 46 27 0 0 0 0 0 0
moses lake 43 23 43 22 42 23 0 0 0 0 0 0
wenatchee 42 27 44 27 40 29 0 0 0 0 0 0
omak 41 26 44 24 43 27 0 0 0 0 0 0

Otx watches warnings advisories
Id... Air stagnation advisory from 7 am this morning to 1 pm pst
Wednesday for central panhandle mountains-coeur d'alene
area-idaho palouse-lewis and southern nez perce counties-
lewiston area-northern panhandle.

Wa... Air stagnation advisory from 7 am this morning to 1 pm pst
Wednesday for east slopes northern cascades-lower garfield
and asotin counties-moses lake area-northeast blue
mountains-northeast mountains-okanogan highlands-okanogan
valley-spokane area-upper columbia basin-washington palouse-
waterville plateau-wenatchee area.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Omak Airport, WA50 mi64 minN 010.00 miFair24°F21°F91%1029.8 hPa

Wind History from OMK (wind in knots)
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Last 24hrN8N10N12N16N11N11N10NW7NW7NW9NW7--N7N9N9N10N5N4N3N3NW6SW4N7Calm
1 day agoN12N11N12N11N15
G23
N18
G25
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G22
N11N11N10N9NW12N9N8N10N10N10N9NW10N10N10NW9NW12N8
2 days agoS4SE5SE4SE6S5S3S7SE7SE6SE6SE3N5N5W4N4N6N10N9N12
G22
NW10N10N15N14NW10

Tide / Current Tables for
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Tide / Current Tables for
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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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Spokane, WA (11,2,3,4)
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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.