MESOSCALE DISCUSSION 0012
   NWS STORM PREDICTION CENTER NORMAN OK
   0729 PM CST THU JAN 10 2013
   
   AREAS AFFECTED...PORTIONS OF NRN/CNTRL MN
   
   CONCERNING...FREEZING RAIN 
   
   VALID 110129Z - 110630Z
   
   SUMMARY...FREEZING RAIN...WITH RATES OF 0.05 IN/HR POSSIBLE...IS
   EXPECTED TO DEVELOP ACROSS PORTIONS OF NRN/CNTRL MN BY 03Z.
   
   DISCUSSION...AN AREA OF PRECIPITATION WILL CONTINUE TO ADVANCE NNEWD
   ACROSS PARTS OF CNTRL/NRN MN THIS EVENING. AS LOW LEVELS SATURATE IN
   RESPONSE TO EVAPORATIVE PROCESSES...FREEZING RAIN WILL BECOME
   INCREASINGLY LIKELY BY 03Z GIVEN SFC WET BULB TEMPERATURES AROUND
   30-32F. THIS ACTIVITY WILL CONTINUE TO BE SUPPORTED BY A ZONE OF
   ELEVATED WAA/ISENTROPIC ASCENT. FORECAST SOUNDINGS INDICATE ELEVATED
   WARM-LAYER TEMPERATURES RISING TO 3-7C IN ASSOCIATION WITH THE WARM
   ADVECTION...AS SUBSTANTIATED BY THE 00Z CHANHASSEN RAOB INDICATING
   AN APPROXIMATELY 7.5-C WARM NOSE AROUND THE 850-MB LEVEL. THIS WILL
   SUPPORT MELTING OF DESCENDING HYDROMETEORS...WITH FREEZING RAIN
   ANTICIPATED AMIDST SFC TEMPERATURES AOB 32F. UPSTREAM OBSERVATIONS
   SUGGEST THAT FREEZING RAIN RATES OF 0.05 IN/HR WILL BE
   POSSIBLE...WITH LOCALLY HIGHER RATES ALSO POSSIBLE. THE THREAT FOR
   FREEZING RAIN WILL CONTINUE INTO THE OVERNIGHT HOURS...WITH A
   LOW-LEVEL FRONTAL ZONE AND ACCOMPANYING MODEST ASCENT REMAINING OVER
   PARTS OF THE AREA.
   
   ..COHEN.. 01/11/2013
   
   
   ATTN...WFO...DLH...MPX...FGF...
   
   LAT...LON   47968955 47689035 47349125 46849184 46639222 46209228
               46009245 45649287 45559324 45579454 46189578 47029626
               48119584 48589481 48549324 48529274 48399228 48259184
               48149137 48139060 48068992 47968955