NZUS99 KSLC 190927

.LONG TERM (After 12Z Tuesday)...A shortwave moving across the 
Northern Rockies will draw some moisture northward across most of 
Utah Tuesday, especially eastern Utah where PWs will increase back 
up 0.60 to 0.80 of an inch. Dynamics look rather weak, although the 
EC shows a vort max drifting northeast across the state in the 
afternoon along with weak 300mb divergence. So have leaned toward 
the NBMexp which had the best coverage and the highest QPFs, which 
isn't stating much. 

The ridge and its anticyclonic flow will dry things out rapidly by 
Wednesday. The Temperatures will remain about 5-10 degrees normal 
through Friday. By Friday the GFS is quite a bit slower than the EC 
(by 24 hrs) on bringing the next cold front into Utah. The GEFs 
ensemble is closer to the EC solution so have trended in that 
direction with a cold front moving through Thursday night such that 
winds will turn northwest Friday verses the robust southwest flow 
the GFS operational model forecasts.
  
&&

.AVIATION...Northwest winds gusting to near 20 kts will occur 
through about 13Z at the SLC terminal but winds then will relax 
some. A broken band of showers and isolated thunderstorms will move 
across the terminal from about 13Z until 18Z but no visibility 
restrictions are expected. Improving conditions with rising cloud 
heights and showers ending should occur by 18-20Z. 

&&

$$

Struthwolf