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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Sunday
• 
• High: 63 °
• Low: 45 °
• T-Storms

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

• Tuesday
• 
• High: 75 °
• Low: 46 °
• Clear

• Wednesday
• 
• High: 79 °
• Low: 43 °
• Partly Cloudy

• Thursday
• 
• High: 73 °
• Low: 41 °
• Partly Cloudy

Area forecast discussion 
National Weather Service Pocatello Idaho 
300 am MDT sun may 19 2013 


Discussion...active trough continues over the northern rockies 
and pacnw. WV Sat imagery shows a weak circulation over eastern 
Idaho with weak convection occurring this morning in the upper 
snake plain and eastern Highlands. A second stronger shortwave 
sliding into western Idaho this morning prognosticated to reach the 
region later today. Air mass again weakly unstable so continued 
high chance showers most locations with isolated thunderstorms 
this afternoon. Shortwave exits the region tonight with flow aloft 
turning northerly ahead of building ridge. Both GFS and NAM linger 
some weak convection along the eastern Highlands into Monday but 
overall trend is drier. Ridge axis in place for Tuesday but GFS 
holding on to potential for weak convection along northern 
forecast area border. Thus kept weak collaboration probability of precipitation along the 
fringes of the region. 


Much deeper upper low settles into the pacnw for much of the 
remainder of the forecast period. Models in general agreement with 
center of the low circulating over Oregon/Washington with multiple 
shortwaves rotating around the low across eastern Idaho. That 
said...both GFS and European model (ecmwf) remain somewhat skimpy with quantitative precipitation forecast fields 
over eastern Idaho as low remains west of the region through Thursday. 
European model (ecmwf) slightly wetter than the GFS...and enough to keep probability of precipitation 
around or slightly higher than climatology through that time. By 
Friday...both models begin to open the low and lift it northeast 
ending in southern Alberta by Saturday morning. GFS drops a 
secondary trough along the coast with dry conditions over Idaho 
Saturday into Sunday while the European model (ecmwf) maintains a flatter and 
slightly wetter flow. Made little change from persistence for days 
7 to 8. Dmh 


&& 


Aviation...northerly flow aloft on the back side and existing storm 
system will bring another round of showers and thunderstorms across 
the region today. MVFR ceilings are possible this morning at kida 
and kpih. This afternoon isolated thunderstorms may produce gusty 
winds and MVFR ceilings. Winds may gust a little this afternoon as 
well as near any thunderstorms. Preston 




&& 


Fire weather...isolated showers and thunderstorms possible today 
across all districts. Monday and Tuesday a ridge of high pressure 
builds with lighter winds, warming temperatures and lower relative 
humidities. A low pressure system develops in the Pacific northwest 
but our area will remain in the warm and dry sector expect the 
central Idaho mountains may see isolated afternoon thunderstorm 
potential through Friday. Preston 




&& 


Pih watches/warnings/advisories... 
none. 
&& 


$$