ZCZC SPCSWOMCD ALL
ACUS11 KWNS 152205 
SPC MCD 152205 
NEZ000-SDZ000-160100-

Mesoscale Discussion 2031
NWS Storm Prediction Center Norman OK
0405 PM CST Wed Dec 15 2021

Areas affected...Northern Nebraska

Concerning...Blizzard 

Valid 152205Z - 160100Z

SUMMARY...Persistent, strong northwesterly winds behind a cold front
may continue to support areas of blizzard conditions across parts of
northern Nebraska. While snow accumulations may be modest, areas of
reduced visibility down to one-quarter mile is probable.

DISCUSSION...Surface observations from northern NE have shown
periods of heavy snow and reduced visibility down to one-quarter
mile over the past 30-60 minutes. While these conditions have been
somewhat localized, strong frontogenesis is occurring within the
925-700 mb layer along a southeastward-surging cold front that will
continue to support areas of moderate snowfall across the region for
at least the next couple of hours. Additionally, modest instability
over the region (250-500 J/kg MUCAPE per recent mesoanalyses) should
support pockets of heavier snowfall. More importantly, strong
northwesterly winds behind the cold front will persist into the
early evening hours with gusts up to 45-55 mph. Given these
temperature/wind combinations, blowing snow model probabilities
suggests areas of blizzard conditions will continue to be probable -
especially over areas with ongoing snowfall.

..Moore.. 12/15/2021

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

ATTN...WFO...LBF...UNR...

LAT...LON   42260142 42960125 43280065 43349998 42899970 42559973
            42110011 41560061 41620103 41920133 42260142 

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