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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Sunday
• 
• High: 63 °
• Low: 36 °
• Rain Showers

• Monday
• 
• High: 75 °
• Low: 39 °
• Partly Cloudy

• Tuesday
• 
• High: 77 °
• Low: 37 °
• Chance of Rain

• Wednesday
• 
• High: 54 °
• Low: 25 °
• Chance of Rain

• Thursday
• 
• High: 61 °
• Low: 36 °
• Chance of Rain

Area forecast discussion 
National Weather Service Boise Idaho 
258 PM MDT sun may 19 2013 


Short term...tonight through Tuesday...high-amplitude short wave 
ridge will move through late tonight and tomorrow...ushering in a 
couple days of warming. This will also decrease the chance of 
showers and storms. In fact...after a slight chance of showers and 
thunderstorms in the far east portion of the County Warning Area this evening... 
the next chance will be in the west Tuesday afternoon as the 
previously mentioned ridge moves off and a deep strong upper low 
moves in from the northwest. Temperatures will rise each day...with highs Monday 
from 75 to 80 at lower elevations and then all the way up to the 
middle 80s in the Treasure valley Tuesday. Eastern Oregon will begin 
to cool late Tuesday as heights fall and cloud cover increases. 
Breezy conditions this afternoon will taper off this evening...and 
winds tomorrow and Tuesday will not be as strong. 


Long term...Tuesday night through Sunday...a strong cold front will 
move through the area late Tuesday night and early Wednesday morning 
as a Deep Cut off low pressure system pushes into the Pacific 
northwest. Afternoon temperatures on Wednesday will be around 10 
degrees below normal...and around 20 degrees lower than tuesdays temperatures. 
The cut off low will stall over the Pacific northwest through Friday night...with 
temperatures 5-10 degrees below normal and a chance of showers each day...mainly 
over the higher terrain. By Saturday the low pressure center will begin 
to move off to our north...though a large scale trough will remain over 
the western United States. This will allow temperatures to rebound to 
near normal values by Sunday. 


&& 


Aviation...VFR under scattered middle-level clouds. Scattered showers 
and thunderstorms possible this afternoon...mainly over the higher 
terrain of SW Idaho. Northwest surface winds at 10-20 kts with local gusts 
to 25 kts...diminishing after sunset. Northerly winds aloft averaging 
10 kts up through 10k feet mean sea level. 


&& 


Boi watches/warnings/advisories... 
Idaho...none. 
Or...none. 
&& 


$$ 


Weather.Gov/Boise 


Short term...snow pellets 
long term....cb/sp 
aviation.....Cb