411 
FXUS66 KPDT 091708 AAA
AFDPDT

Area Forecast Discussion
National Weather Service Pendleton OR
1008 AM PDT Wed Oct 9 2019

Updated Aviation Discussion

.SHORT TERM...Today and tonight...The upper level trough is centered 
over Idaho which places the forecast area on the backside under a 
cold northerly flow. Some snow showers over the eastern portion of 
the forecast area this morning with snow levels down to around 1000 
feet. Showers will decrease today and be confined mainly to wallowa 
county this afternoon and then end. A ridge of high pressure off the 
coast will begin to nudge inland overnight. This will provide clear 
skies and light winds overnight and allow for some very cold 
temperatures to occur, possibly setting some record low temperatures 
Thursday morning. 

.AVIATION...18Z TAFS...VFR conditions will prevail through the 
forecast period. Skies will clear this afternoon and clear skies are 
expected tonight and Thursday morning. Winds will be less than 10 kt 
through the period. 78

 &&

.PREV DISCUSSION... /issued 231 AM PDT Wed Oct 9 2019/ 

SHORT TERM...
Today through Friday night...An upper level trough is moving
through eastern Oregon at this time and should be east of the area
later this morning. A swath of precipitation is evident on radar
mainly south and east of a ALW to PDT line, with rain at the lower
elevations and snow at the higher locations. A the trough moves
eastward, any precipitation should come to and end later this
morning. Current guidance suggests and radar is validating that
not much precipitation is anticipated behind this current swath.
Therefore have lowered pops for later this morning across the area
for the Foothills of the Blue Mountains eastward. Will reassess 
the current winter weather advisory later this morning, but since 
this one area of snow is moving into the advisory area, will keep 
headlines as they are for now. 
 
After the rain/snow end by afternoon, ridging will build into the
the Pacific northwest and dry weather is expected for the
remainder of the week. Temperatures will be unseasonably cold the
next couple of days, with lows tonight in the teens and 20s and
only a couple of degrees warmer Thursday night. Daytime highs will
languish mainly in the 40s at the lower elevations today/30s in 
the mountains, and will warm a bit each day through Friday, making
it well into the 50s in many area, which is still below normal.

LONG TERM...
Saturday through Wednesday...A weak frontal boundary will move 
through this weekend with slight precipitation chances for the 
Cascade crests and portions of the Blues/Wallowas. This front will
be rather moisture starved so expect precipitation amounts to 
remain rather light. Upper level ridging expected to move back 
into the region for the start of next week with dry conditions and
seasonable temperatures. Models in decent agreement on another 
storm system moving into the Pacific Northwest by Wednesday with 
unsettled conditions possible thereafter. Snow levels with this 
mid-week system look to be rather high, keeping much of the 
precipitation in liquid form. Richards

&&

.PRELIMINARY POINT TEMPS/POPS...
PDT  48  24  50  26 /  20   0   0   0 
ALW  49  29  50  30 /  20   0   0   0 
PSC  54  28  54  30 /  10   0   0   0 
YKM  52  26  52  28 /   0   0   0   0 
HRI  53  27  53  29 /  10   0   0   0 
ELN  50  25  49  28 /   0   0   0   0 
RDM  46  19  50  24 /   0   0   0   0 
LGD  38  22  44  25 /  20   0   0   0 
GCD  39  21  46  22 /  20   0   0   0 
DLS  53  31  53  33 /   0   0   0   0 

&&

.PDT WATCHES/WARNINGS/ADVISORIES...
OR...None.
WA...None.
&&

$$

91/78