Mesoscale Discussion 2238
NWS Storm Prediction Center Norman OK
0449 AM CST Sat Nov 29 2025
Areas affected...East-central/southeast NE into southwest/central IA
Concerning...Heavy snow=20
Valid 291049Z - 291615Z
SUMMARY...Snow rates may approach or exceed 1 inch per hour at times
this morning.
DISCUSSION...A long-duration snow event is underway across parts of
NE and IA this morning. A somewhat more organized precipitation band
has recently developed from eastern NE into west-central IA, within
a zone of enhanced frontogenesis within the 900-800 mb layer. This
band may continue to progress eastward in conjunction with a
mid/upper-level shortwave trough (and related surface low) currently
moving eastward across the central Plains.=20
Light to moderate snow has been ongoing this morning across much of
IA, while observations and recent dual-pol data from KOAX indicate
that a changeover from freezing rain/drizzle to snow is underway
from Omaha to near Lincoln, NE. Snow rates within the ongoing band
(and any additional organized bands that develop) may approach or
exceed 1 inch per hour at times this morning. Farther south into far
southeast NE and northwest MO, a residual warm layer may result in a
mix of precipitation types, though brief periods of moderate to
heavy snow rates could occur where a full changeover to snow can be
maintained.