MESOSCALE DISCUSSION 0590
   NWS STORM PREDICTION CENTER NORMAN OK
   0810 PM CDT WED MAY 01 2013
   
   AREAS AFFECTED...NW IA...NE NEB...S-CNTRL/SW MN
   
   CONCERNING...HEAVY SNOW 
   
   VALID 020110Z - 020515Z
   
   SUMMARY...A BAND OF MODERATE TO HEAVY SNOW IS EXPECTED TO DEVELOP
   ACROSS NE NEB NEWD INTO SRN MN DURING THE NEXT FEW HOURS. SNOWFALL
   RATES OF 1 INCH PER HOUR ARE POSSIBLE.
   
   DISCUSSION...UNIQUE LATE SEASON SETUP FAVORING A BAND OF HEAVY SNOW
   IS COMING TOGETHER ACROSS PORTIONS OF THE MID MO RIVER VALLEY.
   LATEST MESOANALYSIS/MODEL GUIDANCE DEPICTS A STRONG UPPER LEVEL JET
   STREAK EXTENDING FROM SD NEWD THROUGH WRN ONTARIO WITH THE MID MO
   RIVER VALLEY UNDER THE RIGHT ENTRANCE REGION. SURFACE COLD FRONT HAS
   MOVED WELL SOUTH OF THE REGION AND EXTENDED FROM SRN WI SWWD THROUGH
   NRN MO AND INTO N-CNTRL OK AT 00Z. PER MESOANALYSIS... SLOPING
   FRONTOGENIC ZONE EXISTS FROM CNTRL MO/ERN KS NWWD INTO E-CNTRL
   NEB/W-CNTRL IA. STRENGTHENING WARM CONVEYOR WILL RESULT IN CONTINUED
   WAA ACROSS MUCH OF THE REGION WITH A BROAD AREA OF POST-FRONTAL
   PRECIPITATION CONTINUING THROUGHOUT MUCH OF THE EVENING AND
   OVERNIGHT. 00Z OAX SOUNDING SHOWS THE POTENTIAL FOR SOME MIXED
   PRECIPITATION...PRIMARILY IP/SN...WITH A SHALLOW WARM NOSE OBSERVED
   AROUND 700 MB. FARTHER N...MPX 00Z SOUNDING SHOWS A COLDER OVERALL
   PROFILE...SUPPORTING ALL SNOW. 
   
   GIVEN ALL OF THESE FACTORS...CONFIDENCE IS HIGH THAT A BAND OF HEAVY
   SNOW WITH SNOWFALL RATES AROUND 1 INCH PER HOUR...WITH BRIEF PERIODS
   OF SLIGHTLY HIGHER RATES...WILL DEVELOP ACROSS THE MD AREA.
   
   ..MOSIER.. 05/02/2013
   
   
   ATTN...WFO...ARX...MPX...DMX...FSD...OAX...GID...
   
   LAT...LON   44239430 44489372 44549275 44309230 43629266 42469384
               42369396 41539510 41039624 40949695 41149747 41769765
               42759618 44059451 44239430