MESOSCALE DISCUSSION 0699
   NWS STORM PREDICTION CENTER NORMAN OK
   0914 AM CDT SAT MAY 05 2007
   
   AREAS AFFECTED...CENTRAL WY
   
   CONCERNING...HEAVY SNOW 
   
   VALID 051414Z - 051945Z
   
   HEAVY SNOW WILL STEADILY INCREASE OVER THE HIGHER ELEVATIONS OF
   CENTRAL WY THROUGH THE AFTERNOON...INCLUDING THE EASTERN SLOPES OF
   THE WIND RIVER MOUNTAINS AND THE BIG HORNS. SNOW RATES WILL LIKELY
   EXCEED 2 IN/HR IN THE HIGHER ELEVATIONS AND FAVORED UPSLOPE AREAS
   SUCH AS LANDER.
   
   ON NORTHERN PERIPHERY OF MID/UPPER LOW OVER CO PER WATER VAPOR
   IMAGERY...LATEST SHORT TERM RUC GUIDANCE SUGGESTS A DRAMATIC
   INCREASE IN EASTERLY LOW TO MID LEVEL UPSLOPE WINDS BY THIS
   AFTERNOON...WITH 50-60 KTS SUGGESTED BY THE RUC AT 700 MB. ALTHOUGH
   TEMPERATURES ARE INITIALLY ABOVE FREEZING IN MANY AREAS...WITH SNOW
   LEVELS AROUND 5000-6000 KT PER SURFACE OBSERVATIONS/RAWS DATA...HIGH
   PRECIPITATION RATES/DYNAMIC COOLING WILL LIKELY QUICKLY LOWER SNOW
   LEVELS INTO THE AFTERNOON. IN ADDITION...WEAK STATIC
   STABILITY/POSSIBILITY OF THUNDERSNOW WILL LIKELY ALSO ENHANCE SNOW
   RATES AND THE LOWERING OF SNOW LEVELS INTO THE EAST CENTRAL WY
   MOUNTAINS AND BIG HORNS.
   
   ..GUYER.. 05/05/2007
   
   
   ATTN...WFO...CYS...BYZ...RIW...
   
   44690762 44880699 44630677 44000657 43450643 42770602
   41820572 41400625 41510727 42150827 42660904 43480949
   44150918 43410821 43510721