627 
fxus65 kpih 132122 
afdpih 


Area forecast discussion 
National Weather Service Pocatello Idaho 
222 PM MST Sat Mar 13 2010 


Short term...the closed low over Nevada and Utah continues to 
settle southward this afternoon and evening. The boundary layer 
winds in southeast Idaho have turned mostly northwesterly just off 
the surface while westerly winds continue in the eastern Magic 
Valley and lower snake plain. This is forcing upslope 
precipitation into the southeast side of the snake plain. 
Temperatures from Raft River eastward are below freezing even 
though snow falling on Road ways is turning wet. There is a risk 
this could all freeze up making roads rather icy. Total snow 
accumulation the rest of this evening will probably be less than 
one inch but with freezing temperatures will continue the current 
Winter Weather Advisory for the lower snake plain and south 
Central Highlands through 11 PM and give things a chance to wind 
down. By Sunday morning just a few isolated showers should linger 
over the northern Wasatch and Caribou Highlands. Otherwise...high 
pressure will build in the next couple of days with temperatures 
warming back into the 40s...even near 50 in some valley areas by 
Tuesday. Receiver station 


Long term...Tuesday night through Saturday. 
European and GFS continue in their disagreement in Thursday through 
Saturday time frame. European consistent in dropping closed 500 
millibar low into Idaho Thursday night while GFS has no low and just 
dry northwesterly flow. Of course the European continues much 
colder and wetter Thursday into Friday while GFS warmer and drier. 
Generally went in between solutions as they have been very 
consistent in their differences. Low probability of precipitation in north through the 
period and everywhere Thursday and Friday. 
Gk 


&& 


Aviation...snow has ended in sun and byi. Wrap around moisture 
sagging south now that upper low has drifted well south. Typical 
convergence setup with winds aloft having turned northerly in snake 
plain and upslope surface winds. IFR conditions may linger this 
evening in light snow with low ceilings at pih and Ida. VFR 
widespread by late Sunday morning. 
Gk 




&& 


Pih watches/warnings/advisories... 
Winter Weather Advisory until 11 PM MST this evening idz021. 


Winter Weather Advisory until 11 PM MST this evening idz022. 


&& 


$$