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Mesoscale Discussion 209
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   MESOSCALE DISCUSSION 0209
   NWS STORM PREDICTION CENTER NORMAN OK
   1106 AM CST FRI MAR 02 2012
   
   AREAS AFFECTED...NERN MO...ERN IA...NRN IL...SRN WI
   
   CONCERNING...HEAVY SNOW 
   
   VALID 021706Z - 022100Z
   
   MODERATE TO HEAVY SNOW WITH RATES NEAR 1 INCH AN HOUR WILL DEVELOP
   LATE THIS MORNING ACROSS ERN IA...PROGRESSING NEWD INTO NRN IL AND
   SRN WI THROUGH THE AFTERNOON.
   
   A BAND OF HEAVIER SNOWFALL IS BEGINNING TO BECOME MORE WELL DEFINED
   ACROSS ERN IA...INTERSECTING A BROAD MOIST SECTOR TO THE EAST AND
   COLDER POST-FRONTAL AIR ADVECTING SEWD FROM THE NORTHWEST. MODERATE
   SNOW HAS OCCASIONALLY BEEN REPORTED FROM KANSAS CITY NEWD TO OTTUMWA
   IA. DRY LOW LEVELS NOTED ON 12Z AREA SOUNDINGS IS LIKELY HINDERING
   HEAVIER RATES ATTM...THOUGH GRADUAL MOISTENING WILL CONTINUE TO
   SUPPORT AN AMALGAMATION OF SNOWFLAKES. AS SUCH...RATES MAY BRIEFLY
   INCREASE LATER THIS MORNING. CURRENT INDICATIONS ARE THAT THIS BAND
   WILL PIVOT EWD...LEADING TO A RATHER TRANSITORY THREAT OF HEAVY
   SNOWFALL RATES FOR PORTIONS OF NERN MO AND ERN IA. HOWEVER...LATER
   TODAY...THE COMBINATION OF VERY FAVORABLE UPPER LEVEL JET DYNAMICS
   AND FRONTOGENETICAL FORCING WILL LIKELY LEAD TO THE
   DEVELOPMENT/REDEVELOPMENT OF A MORE PRIMARY BAND OF HEAVY
   SNOW...FROM ERN IA...NRN IL AND INTO SRN WI.
   
   ..HURLBUT.. 03/02/2012
   
   
   ATTN...WFO...GRB...LOT...ILX...MKX...LSX...DVN...ARX...DMX...
   EAX...
   
   LAT...LON   43589060 43958932 43868855 43708831 43008784 42208810
               41588963 40549073 39629200 39899261 41069254 42839125
               43589060 
   
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Page last modified: March 02, 2012
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