Tuesday, August20, 2019 L-36.com


Marine Weather and Tides
Spokane Valley, WA

Version 3.4
NOTICE
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 5:49AMSunset 7:54PM Tuesday August 20, 2019 8:06 PM PDT (03:06 UTC) Moonrise 10:22PMMoonset 10:52AM Illumination 70% Phase: Waning Gibbous; Moon at 20 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 Spokane Valley, WA
   Hourly   EDIT   Help
location: 47.64, -117.19     debug


Area Discussion for - Spokane, WA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kotx 210013
afdotx
area forecast discussion
national weather service spokane wa
513 pm pdt Tue aug 20 2019

Synopsis
Wednesday a cold front will produce gusty winds and a chance for
rain. Temperatures will cool down after the front with a return
to highs in the upper 70s and 80s through the middle of next week.

Otherwise the weather looks mostly dry.

Discussion
Tonight through Wednesday night: weather pattern change now
underway. Ridge of high pressure influencing the pacific northwest
gets its ridge axis pushed to the east as a cold front tied into a
low pressure circulation off the british columbia coast moves inland
during this time interval. A marine surge coupled with a minor
disturbance or two ahead of the incoming front push thru about 18
hours ahead of the cold front and bring about a bit of middle and
higher elevation cloud cover and a nudged increase in mostly cascade
gap winds tomorrow but the thicker higher cloud cover associated
with the cold front itself is not expected to start invading the sky
from the southwest and west until late in the day Wednesday and then
show some thickening and lowering with time into Wednesday night as
the chance of showers and spotty weak short lived pulse
thunderstorms peaks very late into Wednesday night. The late arrival
of the front coupled with the moderate moisture tap extending into
the cold front should keep relative humidity values high enough to
not need a fire weather highlight attached to it other than the
marginal event wording consisting of "gusty wind and low relative
humidity". Cascade gap winds may indeed show three discrete peaks
going into Wednesday night due to this complicated weather pattern
while locations closer to north idaho may only show the significant
increase in wind late Wednesday afternoon thru Wednesday night. The
resulting pattern change to a trof allows for a cooling trend in
temperatures more apparent in the daytime highs. Pelatti
Thursday... The cold front will push east of the area Thursday
morning. Ample low and mid level moisture, southwest to westerly
flow moisture, and some conditional mid level instability will
keep a chance for showers in the forecast for the idaho panhandle
through the day. Gusty winds will subside through the morning.

Temperatures will be down 2-3 degrees across the western zones and
as much as 8-10 degrees across the eastern zones. This will be
the beginning of several days of below normal temperatures.

Friday and Saturday... A second much weaker low pressure system
will move through b.C. Friday and Saturday. This will result in
isolated to scattered showers bot Friday afternoon and Saturday
afternoon in the mountains near the canadian border. Precipitation
amounts will be light and variable. Temperatures will remain on
the cool side of normal, with light southwest winds.

Sunday through Tuesday... High pressure will build into the eastern
pacific Sunday through Tuesday, while a couple of weak short wave
track south along and east of the continental divide. Northwest
flow on Sunday will gradually shift to northerly Monday and
Tuesday. This will keep temperatures on the cool side. There may
be a few stray mountain showers at times, but these will be
confined to the mountains. Tobin

Aviation
00z tafs: rich moisture streaming into the region ahead of
a pacific cold front will result in broken to overcast mid
and high clouds at or above 10,000 feet agl. The cold front
will move into the cascades Wednesday afternoon around 18-20z
and slowly eastward toward moses lake around 00z. Bands of
showers will develop along the front and could result in brief
rain at wenatchee and moses lake. The front is not expected to
reach spokane-pullman-lewiston until 00-03z. A weak marine push
arrives tonight bringing a light push of west to southwest
winds 05-10z. Pullman may gusts near 20 mph briefly. Of greater
aviation concern will be gusty west to northwest winds moving
out ahead of the cold front Wednesday afternoon 21-03z. Sharp
wind shifts to the west northwest accompanied by gusts of 25-30 mph
will be possible. Sb

Preliminary point temps pops
Spokane 60 88 56 79 54 80 0 0 40 10 0 0
coeur d'alene 59 88 57 76 52 79 0 0 40 20 0 0
pullman 57 86 51 76 48 79 0 0 40 10 0 0
lewiston 65 93 63 82 57 87 0 0 30 10 0 0
colville 51 93 48 85 44 83 0 10 50 10 0 10
sandpoint 54 87 56 76 49 76 0 0 40 30 0 10
kellogg 62 86 59 72 54 75 0 0 40 30 0 0
moses lake 61 88 54 83 52 85 0 20 40 0 0 0
wenatchee 66 83 59 81 59 83 0 40 30 0 0 0
omak 61 86 56 83 57 82 0 20 30 0 0 10

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. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Spokane, Felts Field, WA7 mi74 minNE 610.00 miFair89°F39°F17%1011.1 hPa
Spokane, Spokane International Airport, WA18 mi74 minNE 610.00 miMostly Cloudy88°F42°F20%1011.5 hPa
Coeur d'Alene Airport - Pappy Boyington Field, ID22 mi71 minNNW 510.00 miFair85°F45°F25%1013.3 hPa
Fairchild Air Force Base, WA24 mi69 minNE 610.00 miFair85°F39°F20%1012.2 hPa

Link to 5 minute data for KSFF

Wind History from SFF (wind in knots)
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
4
PM
5
PM
6
PM
7
PM
8
PM
Last 24hrN3N3NE3N3NE4NE4NE3NE3CalmCalmCalmCalmCalm33Calm3CalmCalmW35NW5NE6Calm
1 day agoCalmNE3CalmNE4NE4NE3NE5E5NE4NE4CalmSW6SW11SW9S86W7
G15
4W5S7SW10W3W3Calm
2 days agoCalmCalmCalmCalmCalmSW4CalmNE3CalmNE45W7SW9SW9S7SW64SW12
G17
S8
G14
W53SW6SW8Calm

Tide / Current Tables for
   EDIT   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 (23,6,7,8)
      (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.