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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Saturday
• 
• High: 63 °
• Low: 41 °
• Partly Cloudy

• Sunday
• 
• High: 61 °
• Low: 45 °
• Chance of T-Storms

• Monday
• 
• High: 66 °
• Low: 45 °
• Chance of Rain

• Tuesday
• 
• High: 63 °
• Low: 39 °
• Chance of Rain

• Wednesday
• 
• High: 61 °
• Low: 43 °
• Chance of Rain

Area forecast discussion 
National Weather Service Spokane Washington 
1038 am PDT Sat may 25 2013 


Synopsis... 
Memorial Day weekend is expected to be a little cooler than 
average, and a series of weak upper level disturbances will bring 
the potential for scattered showers Sunday and Monday. The moist, 
showery weather pattern is expected to linger into late next week. 


&& 


Discussion... 
update: satellite imagery from this morning shows two closed 
lows...one near the North Washington coast and another over 
southern Alberta. Models show these two features moving very 
little today. With no strong forcing mechanism to generate 
showers...there should be less shower activity today compared to 
yesterday. The 13z hrrr model shows most of the showers today 
will be along the east slopes of the Cascades and north of the 
Columbia Basin over the northern mountains. This make sense given 
these areas are in closest proximity to the two aforementioned 
lows...and that showers are more likely to develop over the 
mountainous terrain. Forecast has this part of the forecast well 
handled with only change to Lower Mountain pops to 20 percent 
through the morning with better chances holding off til afternoon 
when instability increases. 


Latest sref and Storm Prediction Center guidance, as well as the 13z hrrr model shows 
minimal thunder chances today. The better chances will be north of 
the Canadian border...and over the clearwaters. With cloud cover 
this morning extensive over the Idaho Panhandle and northeast 
Washington mountains...this will further lower convective 
potential. Cloud cover was increased this morning over north 
Idaho, and thunder was removed from the northern mountains, but a 
slight chance was kept for the Camas Prairie with this area on the 
edge of the best convective potential. Also lowered high 
temperatures today a few degrees for Sandpoint and Kellogg. Jw 


&& 


Aviation... 
18z tafs: an upper level trough will remain over the inland 
northwest over the next 24 hours. Today showers will increase 
mainly over the mountains but instability is marginal for 
thunderstorms with none expected. These showers will die off after 
03z with the loss of daytime heating. Another disturbance embedded 
within this trough will spreading thickening cloud cover into the 
region between after 14z Sunday especially keat/kmwh where a few 
showers may develop. The bulk of the showers should hold off til 
after 18z Sunday. Jw 


&& 


Preliminary point temps/pops... 
Spokane 63 44 65 46 65 47 / 20 10 30 40 30 10 
Coeur D'Alene 63 42 65 45 64 44 / 20 20 30 40 40 10 
Pullman 64 43 63 44 65 46 / 10 10 30 40 20 20 
Lewiston 71 48 70 50 71 51 / 10 10 30 40 20 20 
Colville 67 41 72 45 69 44 / 40 30 20 20 50 20 
Sandpoint 61 39 66 43 63 42 / 30 20 20 40 50 20 
Kellogg 59 44 63 46 62 47 / 40 20 30 50 50 20 
Moses Lake 72 46 73 49 73 50 / 10 10 30 20 10 20 
Wenatchee 68 47 70 49 71 51 / 10 10 30 10 10 20 
Omak 68 41 71 45 70 46 / 30 20 30 10 20 10 


&& 


Otx watches/warnings/advisories... 
Idaho...none. 
Washington...none. 
&& 


$$