Area forecast discussion...updated 
National Weather Service Pendleton or 
1020 am PDT Friday Jun 24 2016 

Updated aviation discussion 

Update...scattered to isolated showers this afternoon and evening. 
Coverage should diminish throughout the day as low shifts off the 
the east and stable drier air will take place. There is the 
possibility of some showers over the blue and Wallowa Mountains to 
become brief thunderstorms. So have added isolated thunder through 
the late afternoon for these areas. Winds are already breezy with 
the system coming in and will increase with daytime heating and 
increased mixing. Ellensburg looks like it will see the strongest 
sustained winds 30-35 mph, and therefore we'll be issuing a Wind 
Advisory through 6 PM PDT today for the Kittitas Valley. 
Additionally, patchy blowing dust might be an issue across the basin 
and foothills zones with todays wind. Weber 

Aviation...18z tafs...VFR conditions are expected through the next 
24 hours with a few-scattered clouds today then becoming sky clear overnight. A 
mid/upper level trough will continue moving across the interior 
Pacific northwest today producing some windy conditions of 15-30kts 
through this evening. Winds will decrease around sunset and become 
less than 10 kts overnight through Saturday. 


Previous discussion... /issued 300 am PDT Friday Jun 24 2016/ 

Short through upper low pressure system is 
crossing the region and County Warning Area at this time. There is limited moisture 
with this system. However there is enough instability and moisture 
to warrant isolated to scattered showers over the mountains today 
and there will be a slight chance of afternoon thunderstorms over 
the northeast mountains. Current radar imagery shows some showers 
associated with this system over the northern Blue Mountain 
foothills and the Blue Mountains. The upper low will move to the 
northeast of the County Warning Area tonight. This will result in decreasing showers 
and clouds with a dry and stable northwest flow behind it by 
Saturday morning. Then the dry and stable conditions will persist 
into Sunday. There will be a warming trend through the short term 
period as high pressure builds over the region. It will be breezy to 
windy today and then light winds are expected on Saturday and 
Sunday. 88 

Long term...Sunday night through upper level 
ridge will give way to a weak short wave moving through the region 
on Monday afternoon and evening so I have a slight chance of 
thunderstorms in the Blue Mountains to the ochoco-John Day Highlands 
and along the east slopes of the Washington Cascades for Monday 
afternoon/evening. After the short wave exits the region the ridge 
builds back over the forecast area for dry and stable conditions 
from Tuesday through Thursday. Polan 


Preliminary point temps/pops... 
PDT 71 49 80 53 / 20 10 0 0 
alw 73 54 81 59 / 20 10 0 0 
psc 77 52 84 54 / 20 10 0 0 
ykm 75 48 83 53 / 10 10 0 0 
hri 74 51 84 53 / 20 10 0 0 
eln 68 49 80 51 / 20 10 0 0 
rdm 69 39 80 45 / 10 0 0 0 
lgd 65 43 76 46 / 20 10 0 0 
gcd 68 43 79 48 / 10 0 0 0 
dls 72 53 85 58 / 10 10 0 0 


PDT watches/warnings/advisories... 
Washington...Wind Advisory until 6 PM PDT this evening for waz026. 




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