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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Thursday
• 
• High: 59 °
• Low: 36 °
• Thunderstorm

• Friday
• 
• High: 68 °
• Low: 39 °
• Partly Cloudy

• Saturday
• 
• High: 72 °
• Low: 39 °
• Chance of a Thunderstorm

• Sunday
• 
• High: 68 °
• Low: 43 °
• Partly Cloudy

• Monday
• 
• High: 70 °
• Low: 45 °
• Partly Cloudy

Area forecast discussion 
National Weather Service Pocatello Idaho 
124 PM MDT Thursday may 23 2013 


Short term...tonight through Sunday. The deep upper low continues 
to spin over Washington this afternoon. A secondary circulation center near the 
northern California/Nevada border is expected to rotate into Idaho by this evening. This 
wave will set off scattered showers and isolated thunderstorms over the northern 
part of the forecast area this afternoon and evening before rotating into Montana 
later tonight. The upper low is expected to lift out of Washington into 
British Columbia/ab on Friday. This will take most of the precipitation north out of 
the area...with only isolated showers in the far north through Friday 
night. Precipitation coverage will increase somewhat over the central 
mountains Sat afternoon/evening as another minor upper wave moves through. A more 
vigorous upper trough moves into the Pacific northwest on Sunday. This will 
increase the threat of showers and isolated thunderstorms across the forecast 
area Sun afternoon...with the best chances in the north. 


The cold upper low today...along with clear skies and light winds 
will allow temperatures to fall to unseasonably cold readings Friday 
morning. Temperatures will be very near 32 f in outlying areas...so a 
frost advisory will be issued for the Snake River Plain/eastern 
Magic Valley. Temperatures will warm up for Friday afternoon and through the weekend. 
Hedges 


Long term...Sunday night through Thursday. 
Overall models differ in this period in strength and timing of troughs 
moving through eastern Idaho but both European and GFS models 
indicate convective activity Monday through Wednesday at least. 
Kept in slight chance or chance of showers and thunderstorms in each 
period. Will be many dry periods but with the model and timing 
differences tough to distinguish. GFS keeps upper low off coast 
while European more progressive and zonal in flow aloft. 
Temperatures should be near seasonal normals within a few degrees. 
Gk 


&& 


Aviation...has been VFR today with mainly a middle level cloud deck. 
Expect isolated showers and thunderstorms near sun and have that as 
vicinity in taf. At 1 PM up valley winds have not yet developed at 
pih and Ida but expect some mainly 10 to 15 knots at most later this 
afternoon. Continued VFR through Friday. 
Gk 


&& 


Pih watches/warnings/advisories... 
frost advisory from 3 am to 8 am MDT Friday idz017-020-021. 


&& 


$$