MESOSCALE DISCUSSION 0057
   NWS STORM PREDICTION CENTER NORMAN OK
   0656 PM CST MON JAN 31 2011
   
   AREAS AFFECTED...ERN INDIANA...NERN AND CNTRL OHIO
   
   CONCERNING...WINTER MIXED PRECIPITATION 
   
   VALID 010056Z - 010600Z
   
   MIXED WINTER PRECIPITATION CURRENTLY FALLING OVER MUCH OF CNTRL AND
   NRN INDIANA WILL CONTINUE TO TRACK E/NE INTO OHIO THIS EVENING.
   FREEZING RAIN WITH SLEET AT TIMES IS EXPECTED ALONG THE I-70
   CORRIDOR FROM INDIANAPOLIS TO COLUMBUS THEN NEWD TOWARD MANSFIELD
   AND CANTON BY 03Z-06Z. FURTHER SOUTH OF I-70 AND TOWARD THE OHIO
   RIVER...PRECIPITATION WILL BE MUCH LIGHTER.  ACROSS THE NORTHERN
   PORTIONS OF THE MCD AREA FROM NEAR FORT WAYNE TO FINDLAY AND
   TOLEDO...MODERATE TO HEAVY SNOWFALL IS EXPECTED WITH RATES
   APPROACHING ONE INCH PER HOUR THROUGH AT LEAST 06Z.
   
   ALL OF THIS IS RELATED TO REGION OF WAA/ISENTROPIC UPGLIDE IN
   VICINITY OF 292K-295K LAYER AND 850 MB FRONTOGENETIC BAND NOW
   LOCATED ACROSS CNTRL INDIANA. PRECIPITATION IS EXPECTED TO CONTINUE
   THROUGH MUCH OF THE EVENING AND INTO THE OVERNIGHT HOURS AS MID
   LEVEL JET AROUND 40 KT AND VORTICITY MAX ALIGN TO ENHANCE DEEP LAYER
   LIFT AND MAINTAIN/STRENGTHEN 850-700 MB FRONTOGENETIC BAND. IT
   SHOULD ALSO BE NOTED THAT STEEP LAPSE RATES AND SOME MODEST
   INSTABILITY NOTED ON FORECAST SOUNDINGS COULD LEAD TO SOME BRIEF
   PERIODS OF CONVECTIVE BANDS WHERE RATES WOULD EXCEED THOSE MENTIONED
   ABOVE.
   
   FORECAST SOUNDINGS INDICATE WARM NOSE OF 3-6 C ACROSS MUCH OF
   W-CNTRL AND CNTRL OHIO TONIGHT...ALLOWING PRECIPITATION TO FULLY
   MELT BEFORE REACHING THE NEAR SFC FREEZING LAYER. FURTHER N...THERE
   MAY BE A TRANSITION ZONE WHERE SLEET MIXES WITH FREEZING RAIN AND/OR
   SNOW BEFORE PROFILES BECOME FAVORABLE FOR DENDRITES TO REMAIN FROZEN
   AND FALL AS SNOW ACROSS NERN INDIANA AND NWRN OHIO.
   
   ..STOPPKOTTE.. 02/01/2011
   
   
   ATTN...WFO...PBZ...CLE...ILN...IWX...IND...
   
   LAT...LON   41408238 41288213 41118197 40788186 40568188 40318207
               40058255 39488405 39168517 39158624 39268667 39388685
               39668689 40108666 40888632 41198609 41458553 41568481
               41658444 41698355 41658287 41408238