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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Saturday
• 
• High: 64 °
• Low: 37 °
• Chance of T-Storms

• Sunday
• 
• High: 70 °
• Low: 41 °
• Chance of Rain

• Monday
• 
• High: 64 °
• Low: 32 °
• Chance of Rain

• Tuesday
• 
• High: 70 °
• Low: 41 °
• Partly Cloudy

• Wednesday
• 
• High: 55 °
• Low: 41 °
• Chance of Rain

Area forecast discussion 
National Weather Service Spokane Washington 
1048 PM PDT Fri may 24 2013 


Synopsis... 
cool and showery weather will continue through Saturday, then a 
subtle warming and drying trend is anticipated by Monday as the 
upper-level low moves out of the area. The break will be 
short lived as another cool, showery pattern returns around the 
middle of next week. 






&& 


Discussion... 
update: three different areas of low pressure this evening will 
have some degree of impact on the weather through tonight. One 
low is pushing across the basin this evening into the Idaho 
Panhandle. This system is responsible for the scattered showers 
and thunderstorms that quickly developed over the Palouse earlier 
this evening. This batch of showers is expected to continue to 
push east with this system through the late evening hours. With 
our daytime heating being the primary mechanism of instability 
with this convection, I don't expect any more lighting from these 
showers now that the sun is setting. 


The second area of low pressure is located over southern Alberta. 
Moisture wrapping around this system is pushing across some mid 
level cloud cover into the region out of Canada. Radar imagery 
does show some showers with this activity. Model data also 
indicates a bit more upper level instability across these northern 
zones from the Okanogan Highlands over into the northern 
Panhandle. As a result, I do expect showers to continue across 
these areas through the night; although, according to the hrrr 
model, much of these showers will remain north of the Canadian 
border. 


A third area of low pressure is beginning to take shape over 
Victoria British Columbia. This area of low pressure is generating some 
scattered showers west of the Cascade crest, and I expect much of 
these showers will remain in western Washington. This system will be the 
primary forcing mechanism for more showers on Saturday as a vort 
Max rotates around the base of the low pressure center. 


Some patchy fog was added to the forecast for late tonight into 
tomorrow morning across the northern mountain valleys and across the 
central Panhandle valleys. Colder temperatures and some added 
moisture from today should allow these locations to saturate near 
the surface under the inversion. The mid level cloud cover 
approaching from the north is expected to temper the radiative 
cooling tonight closer to the Canadian border; however, models 
indicate that this cloud shield will remain across the northern 
half of these mountain zones. So I did trim back mention of fog 
away from the Canadian border a bit and mainly kept it in for 
locations such as Newport, Deer Park, Fruitland and Keller. /Svh 


&& 


Aviation... 
06z tafs: the inland northwest will be under a broad area of low 
pressure through tonight. Mid to high level cloud cover is expected 
over much of the region through Saturday morning. Some low level 
moisture across the northern valleys and Panhandle valleys tonight 
may result in some patchy fog by the morning hours. Another 
relatively weak system for Saturday afternoon will produce mainly 
mountain showers. /Svh 




&& 


Preliminary point temps/pops... 
Spokane 41 63 44 65 46 68 / 20 20 10 20 10 30 
Coeur D'Alene 41 63 42 65 43 67 / 20 20 20 30 10 40 
Pullman 35 64 43 63 43 67 / 20 10 10 30 30 20 
Lewiston 42 71 48 70 49 74 / 10 10 10 30 40 20 
Colville 40 67 41 72 43 72 / 30 40 30 20 10 40 
Sandpoint 40 63 39 66 41 66 / 30 30 20 20 10 40 
Kellogg 41 61 44 63 45 65 / 40 40 20 30 20 40 
Moses Lake 42 72 46 73 48 74 / 0 10 0 10 10 10 
Wenatchee 48 68 47 70 50 71 / 10 10 10 10 10 10 
Omak 39 68 41 71 44 72 / 10 30 20 10 10 20 


&& 


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


$$