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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Wednesday
• 
• High: 63 °
• Low: 36 °
• T-Storms

• Thursday
• 
• High: 59 °
• Low: 36 °
• T-Storms

• Friday
• 
• High: 63 °
• Low: 30 °
• Chance of a Thunderstorm

• Saturday
• 
• High: 64 °
• Low: 39 °
• Partly Cloudy

• Sunday
• 
• High: 66 °
• Low: 43 °
• Mostly Cloudy

Area forecast discussion 
National Weather Service Pocatello Idaho 
144 PM MDT Tuesday may 21 2013 


Short term...tonight through Friday. The upper ridge over the 
northern rockies is moving out of the area this afternoon as a 
deep upper low moves into the Pacific northwest. The upper low is expected to 
stall out over Oregon and wobble between or and Washington through Friday. SW 
flow aloft is strengthening over Idaho ahead of the low...and will 
result in stronger surface winds on Wednesday. A lake Wind Advisory has 
been issued for Wednesday. Current guidance suggests winds will approach 
Wind Advisory criteria...so will have to watch newer guidance for 
a possible upgrade to the lake Wind Advisory. Models still showing 
the precipitation to be mainly concentrated over the central mountains...and 
to a lesser degree over the eastern Highlands through Friday. Isolated 
showers are possible over the Snake River Plain and southern 
Highlands...but the strong SW flow results in downslope conditions 
..thus tending dry. Radar already showing showers in NE or this 
afternoon. Temperatures will be cooler through the end of the week. A Little 
Mountain snow will be possible above 7500 feet...but accumulations 
should be light. Hedges 


Long term...Friday night through Tuesday. 
New GFS run showing more progressive trough now pushing through 
eastern Idaho with the best chance for showers and thunderstorms 
late Sunday and Monday with a second trough moving through Tuesday and 
another chance of showers and thunderstorms. Should affect mainly 
the central mountains Sunday with more widespread coverage possible 
Monday. European model keeps most shower activity in central 
mountains and upper snake Highlands through Monday. In grids have 
slight chance in mountains Saturday and slight chance to chance all 
locations Sunday through Tuesday. Temperatures should be near 
seasonal normals through the period. 
Gk 


&& 


Aviation...have vicinity showers at Hailey this afternoon as some 
moisture works through southeast Idaho. Do not expect widespread 
showers or thunderstorms and kept out of the other three sites. 
Strong south to southeast winds ahead of the front have picked up at 
all four sites and 10 to 20 knot sustained winds expected through 
sunset. 
Gk 


&& 


Pih watches/warnings/advisories... 
lake Wind Advisory from 9 am to 9 PM MDT Wednesday idz021. 


&& 


$$