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| Mesoscale Discussion 99 | |
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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
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