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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Wednesday
• 
• High: 75 °
• Low: 52 °
• Rain Showers

• Thursday
• 
• High: 66 °
• Low: 52 °
• Rain Showers

• Friday
• 
• High: 70 °
• Low: 54 °
• Chance of Rain

• Saturday
• 
• High: 79 °
• Low: 54 °
• Partly Cloudy

• Sunday
• 
• High: 79 °
• Low: 57 °
• Partly Cloudy

Area forecast discussion...updated 
National Weather Service Spokane Washington 
736 PM PDT Wed Jun 19 2013 


Synopsis... 
cool and rainy conditions will be common across the region through 
Thursday with the heaviest rainfall amounts concentrated across 
portions of the Idaho Panhandle and northeastern Washington. The 
rain will gradually subside late Friday with a drying and warming 
trend expected briefly this weekend. Another period of wet and 
cool weather will arrive potentially as early as Sunday afternoon 
and persist through much of next week. 






&& 


Discussion... 


..moderate rainfall accumulations tonight into Thursday for the 
Idaho Panhandle may cause localized flooding and mud slides... 


Update: the mid level deformation band has pushed north and east of 
the region early this evening with much of the heavier rainfall 
associated with this band across Montana into southwestern British Columbia. 
Behind this band are widespread rain showers, which are generally 
east of the Okanogan and Wenatchee river valleys as moisture wraps 
into the region around a surface low pressure area located over 
the upper Columbia Basin. The upper level trough of low pressure 
is expected to push slowly north-northeastward across the region 
tonight. A vorticity maximum around the base of the trough will 
provide some additional lift and focus a heavier band of rainfall 
across the eastern half of the forecast area (from the Washington Palouse 
to the Spokane area to the northeast mtns and points eastward). 
This band is beginning to take shape across the northeast blue 
mtns into Pullman/Lewiston and into the central portion of 
the Idaho Panhandle. Rainfall amounts were updated a bit with this 
next band and were generally increased across the Washington Palouse and 
across the Spokane area. We will also continue to see moisture 
wrapping around cyclonically southward into the region from BC, 
which will continue to produce rain showers across the northern 
mtns that will track into the basin. Additional rainfall 
amounts are expected to be around 0.50 inches in the valleys across 
extreme eastern Washington to 0.75 inches in the mtns and 0.75-1.00 
additional inches of rainfall across the Idaho Panhandle. These 
amounts will likely result in some rises to creeks and small 
streams and cause ponding of water in low lying areas. The wettest 
areas up to this point have been across the central Panhandle 
mtns to the northern Panhandle and into the northeast mtns; 
current 24-hr rainfall totals through 7:00 PM generally range from 
about 0.50 to 1.50 inches and up to around 2.00 inches in places 
across the northern Panhandle. These areas are currently under a 
Flood Advisory. At the moment, we have not received any reports of 
flooding, but conditions may deteriorate as the next band sets up 
across these areas; thus, the Flood Advisory will remain as is for 
now, but may need to be updated later this evening as this next 
band takes shape. 


Temps were lowered slightly based off the 18z model runs and the 
current observation trends. This change was relatively minor and 
generally only resulted in a 1 to 2 degree decrease in low temps 
for tonight. /Svh 


&& 


Aviation... 
00z tafs: the initial band of rainfall is slowly pushing north and 
eastward across the region and is currently draped across western 
Montana into the northern Panhandle. A secondary band is beginning 
to form across southeast Washington into the central Idaho Panhandle where 
moderate rainfall has been reported at kpuw and klws. This band will 
slowly push northward through tonight with the western most extent 
of this band staying just east of kmwh. Isolated to scattered 
showers will form between these two bands before steadier rainfall 
begins to impact the Spokane/Coeur D'Alene areas. The boundary layer 
will remain very moist tonight with MVFR/IFR cigs expected. 
Visibilities will likely lower into MVFR category with the secondary 
rain band as it lifts northward through tonight. /Svh 






&& 


Preliminary point temps/pops... 
Spokane 47 56 45 61 46 70 / 90 90 60 60 20 10 
Coeur D'Alene 48 54 43 60 45 69 / 100 90 70 60 40 20 
Pullman 47 60 42 60 43 69 / 100 60 50 50 50 10 
Lewiston 51 67 46 67 50 76 / 100 50 30 50 40 10 
Colville 52 57 47 67 45 75 / 90 100 90 60 20 20 
Sandpoint 50 53 44 60 43 70 / 100 100 90 60 40 20 
Kellogg 46 52 41 57 44 66 / 100 100 70 70 60 30 
Moses Lake 53 69 49 69 50 79 / 40 60 30 30 10 10 
Wenatchee 54 67 52 68 54 78 / 20 60 40 30 10 10 
Omak 52 63 50 69 49 77 / 60 80 60 50 10 10 


&& 


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


$$