Storm Prediction Center Mesoscale Discussion 99

   Mesoscale Discussion 0099
   NWS Storm Prediction Center Norman OK
   1218 PM CST Thu Feb 19 2026

   Areas affected...Eastern Nebraska and western Iowa

   Concerning...Heavy snow 

   Valid 191818Z - 200015Z

   SUMMARY...Heavy snow is expected to develop eastward into eastern
   Nebraska through the afternoon and reach western Iowa this evening. 
   Snowfall rates could exceed 1 inch per hour for a few hours.

   DISCUSSION...A midlevel shortwave trough and associated low-midlevel
   ascent will spread eastward from central into eastern NE through the
   remainder of the afternoon.  An initially dry column with a small
   warm nose will cool/saturate as precipitation forms and increases in
   intensity from west-to-east, with snow expected to be the primary
   precipitation type as a result of wet bulb temperatures well below 0
   C.  Focused ascent through the dendritic growth layer (driven
   primarily by warm advection/frontogenesis 850-600 mb) will support
   snowfall at or above 1 inch per hour later this afternoon/evening.

   ..Thompson.. 02/19/2026

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

   ATTN...WFO...DMX...FSD...OAX...GID...LBF...

   LAT...LON   41799835 42109777 42249638 42209567 41979531 41439514
               41159540 41079627 41139780 41489833 41799835