Mesoscale Discussion 0007
   NWS Storm Prediction Center Norman OK
   0635 AM CST Fri Jan 01 2021

   Areas affected...extreme northeast MO...southeast IA...central and
   northern IL into northwest IN

   Concerning...Freezing rain 

   Valid 011235Z - 011700Z

   SUMMARY...Periods of moderate to heavy freezing rain will continue
   across far northeast MO into central IL and parts of northwest IN
   early this morning. Precipitation rates will increase across
   northern IL over the next couple of hours.

   DISCUSSION...A band of freezing rain, moderate to heavy at times,
   will continue from far northeast MO into central IL and northwest IN
   the next couple of hours. As the upper low over OK continues to
   eject northeast this morning, a strong deformation zone will lift
   northward across the northern IL vicinity. Meanwhile, strong warm
   advection in the 850-700 mb layer will continue to support efficient
   precipitation rates over a shallow near-surface cold layer around
   26-32 degrees F. Freezing rain rates have been as high as 0.05
   inches per hour for brief periods early this morning, but overall
   rates of around 0.03-0.05 inches per 3 hour period are more
   widespread. Some areas could see brief instances of snow or sleet
   mixing with freezing rain, especially as the upper low tracks closer
   to the region and midlevel temperatures cool sufficiently later this
   morning toward midday.

   ..Leitman.. 01/01/2021

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...IWX...IND...LOT...ILX...LSX...DVN...

   LAT...LON   40439171 40899129 41119106 41429018 41618887 41608808
               41588763 41458729 41248701 40998681 40578695 40268744
               39918819 39728911 39539020 39659118 40029179 40279183
               40439171