SPC MD 140

MD 0140 CONCERNING BLIZZARD FOR PORTIONS OF EXTREME EASTERN NEBRASKA INTO WESTERN IOWA

Mesoscale Discussion 0140
NWS Storm Prediction Center Norman OK
0720 PM CST Tue Mar 04 2025

Areas affected...portions of extreme eastern Nebraska into western
Iowa

Concerning...Blizzard 

Valid 050120Z - 050515Z

SUMMARY...Blizzard conditions are expected to become more common
through early tonight. Sustained winds over 40 mph are possible amid
intermittent bouts of moderate to heavy snow and quarter-mile
visibilities.

DISCUSSION...A surface low, analyzed just east-northeast of the
Kansas City metropolitan area, continues to drift northeast while
gradually deepening. The northwest quadrant of this low continues to
overspread portions of extreme eastern NE into western IA, where
deep-layer cold-air advection is supporting the transition from rain
to snow. Surface observations and correlation coefficient data from
KOAX NEXRAD radar indicate the rain/snow transition line roughly
from Crawford to Fremont Counties in IA, with surface northwesterly
winds intensifying to over 30 kts west of this line. The expectation
is for sustained surface winds to reach 40 mph in spots, with
increasing snowfall rates (perhaps briefly reaching 1 inch/hour)
over the next few hours. Such conditions may reduce visibility to
around a quarter mile or less. Additionally, the latest
high-resolution guidance consensus suggests that blizzard conditions
are most likely across western IA in the 02-08Z time frame.

..Squitieri.. 03/05/2025

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

ATTN...WFO...DMX...EAX...FSD...OAX...

LAT...LON   40249688 40929684 41939659 42419633 43079549 43309480
            43189418 42959391 42589392 41989430 41179480 40699525
            40339576 40109647 40249688 

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