SPC MD 104

MD 0104 CONCERNING HEAVY SNOW FOR PORTIONS OF IOWA Mesoscale Discussion 0104 NWS Storm Prediction Center Norman OK 0607 PM CST Thu Feb 19 2026 Areas affected...Portions of Iowa Concerning...Heavy snow Valid 200007Z - 200600Z SUMMARY...Snow rates possibly exceeding 1 inch per hour are expected from western into central Iowa this evening. DISCUSSION...Water-vapor imagery suggests significant midlevel drying is spreading across southeast NE into southern IA, just south of expected 700mb low track. Latest radar data supports this with a well-developed corridor of heavy snow currently noted across eastern NE into western IA. Large-scale ascent is beginning to increase downstream into central IA, and precipitation is gradually expanding into this region within the warm advection zone. Forecast soundings exhibit steep midlevel lapse rates across central IA, and reflectively suggests some convective nature with this new development that is spreading north. Over the next few hours a southwest-northeast oriented band of heavy snow should establish itself as the 700mb circulation advances east. Snow rates could exceed 1 inch per hour at times. ..Darrow.. 02/20/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DVN...ARX...DMX...FSD...OAX... LAT...LON 41199564 41499378 42119201 43019227 42729386 42109584 41199564 Read more