Thursday, May24, 2018 L-36.com


Marine Weather and Tides
Spokane Valley, WA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 4:58AMSunset 8:33PM Thursday May 24, 2018 4:29 PM PDT (23:29 UTC) Moonrise 3:15PMMoonset 3:07AM Illumination 76% Phase: Waxing Gibbous; Moon at 10 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 242318
afdotx
area forecast discussion
national weather service spokane wa
418 pm pdt Thu may 24 2018

Synopsis
More showers and thunderstorms are expected through Saturday,
mainly over the idaho panhandle and extreme eastern washington.

Drier and seasonably warm conditions are expected for the
remainder of the memorial day weekend. More showery weather is
expected next week accompanied by cooler more seasonal
temperatures.

Discussion
Tonight and Friday... Satellite reveals an offshore upper level
trough approaching the west coast this afternoon... Splitting into
a closed low and northern branch trough structure as it does.

Ahead of this trough and over the western us a weak short wave
ridge is popping up over the inland northwest... Removing any
synoptic lift from the equation to interact with a continued
unstable and moist air mass over the region. Thus... Showers and a
few thunderstorms are still apparent over the mountains
surrounding the basin this afternoon and evening triggered by
orographic ascent... But the widespread and rambunctious activity
noted throughout the region yesterday and last night will not
repeat today. The existing showers and storms will likely die
shortly after sunset this evening for a quiet and benign overnight
period and into Friday morning.

Friday will probably resemble today as far as showers and isolated
thunderstorm activity... Highly mountain oriented with the basin
dry and mostly sunny. As the ridge axis moves off to the east a
few degrees of cooling will be likely for Friday's high
temperatures... But there will still be no appreciable change to
the overall air mass characteristics on Friday.

Friday night and Saturday... During this period the offshore
splitting trough will move inland with the closed low portion
settling into the great basin but with the northern branch trough
transiting the forecast area. This will bring a change in the
weather... Mainly with a cold front and provide lift and focus for
a more coherent round of showers and isolated thunderstorms
mainly over the eastern third of washington and especially the
idaho panhandle overnight Friday and into Saturday morning. This
front will also promote breezy conditions near the cascade gaps
and down the okanogan valley. The post frontal air mass will be
noticeably cooler with Saturday's high temperature retracting back
toward but maybe not quite normal readings. In fact depending on
precipitation prevalence cloud cover over the idaho panhandle
temperatures may be below normal on Saturday... Down into the the
mid to upper 60s. Showers and afternoon isolated thunderstorms
will be found over the idaho panhandle Saturday with the rest of
the forecast area in a more stable air mass under sunny and dry
conditions.

Sunday looks like a splendid day for outdoor activities as the
great basin closed low tracks eastward and the northern branch
storm track retreats into canada allowing an upper level ridge to
build into the region. A warming trend will begin again on Sunday
with temperatures recovering into the upper 70s and lower 80s in
the basin and most valleys. Fugazzi
Monday through Thursday: high pressure strengthens over the northwest
Monday to close out the holiday weekend with dry and warm
conditions. In fact, Monday could prove to be the warmest day of
the next seven days with most communities warming into the mid to
upper 80s. The only caveat to Monday will be a sliver of moisture
and instability brushing southern lewis and southeastern shoshone
county keeping a small risk for showers and t-storms from the
camas prairie to southern shoshone county. Tuesday through
Thursday, a cooler trough of low pressure swings into the region
from the gulf of alaska. There are still some differences between
the medium range models regarding the exact timing of the trof
axis and cold front being ushered through but these differences
appear to be shrinking with each run and moving toward a Tuesday
timing. A band of showers will accompany the showers with the best
chance for light showers will be over the idaho panhandle and
mountains of NE while little to no measurable precipitation falls
in the lee of the cascades and columbia basin. Winds will be
breezy with the front and each day but speeds look to remain in
check and only increase on the order of 10-20 mph with afternoon
gusts around 20-30 mph. Temperatures will peak on Monday then cool
each day returning to the 70s by midweek. Sb

Aviation
00z tafs: under a moist and unstable boundary layer and light
southwest flow aloft, afternoon convection has bloomed over the
northern mountains and blue mountains with isolated thunderstorms
which should taper off between 02z-03z. May see vcsh near klws,
but the remaining TAF sites should be dry. Expect mostly clear and
vfr skies overnight with light winds. Cirrus will increase after
18z Friday. Isolated afternoon convection is possible mainly in
the mountains, but should be less than seen today. Rfox.

Preliminary point temps pops
Spokane 57 79 55 71 50 77 0 10 20 20 10 10
coeur d'alene 56 80 54 70 48 77 10 10 30 20 10 10
pullman 55 76 52 65 46 71 10 10 50 40 10 10
lewiston 59 82 57 70 51 77 30 20 60 50 10 10
colville 55 82 53 79 48 84 20 10 10 10 10 0
sandpoint 53 80 52 72 46 78 20 20 30 20 10 10
kellogg 54 78 51 66 46 74 20 20 50 40 10 10
moses lake 56 82 53 79 49 82 0 10 10 0 10 0
wenatchee 56 79 53 77 51 83 0 10 10 0 10 0
omak 56 82 53 80 50 83 10 10 10 0 10 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
Spokane, Felts Field, WA7 mi37 minSSW 8 G 1810.00 miMostly Cloudy79°F52°F39%1012 hPa
Spokane, Spokane International Airport, WA18 mi37 minSSW 1110.00 miA Few Clouds78°F53°F42%1012.3 hPa
Coeur d'Alene Airport - Pappy Boyington Field, ID22 mi34 minSSW 910.00 miOvercast79°F55°F45%1014.1 hPa
Fairchild Air Force Base, WA24 mi32 minSSW 1110.00 miFair78°F50°F38%1012.9 hPa

Wind History from SFF (wind in knots)
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
4
PM
Last 24hrN3E3Calm35NW6CalmNE8CalmCalmCalm3CalmCalmCalmE3SW8S9SW9
G15
S11
G16
S10
G17
S13
G19
SW10
G14
SW8
G18
1 day agoN95N3CalmCalmCalmCalmN3NE3CalmN3NE3NE3CalmCalm3CalmCalmE5SE8E8E85E7
G19
2 days agoW5W8W7CalmCalmCalmE3N3NE3NE3NE3N3N3CalmCalmN3Calm3Calm3NW733NW7
G19

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.