MD 0452 CONCERNING HEAVY SNOW FOR SOUTHWEST INTO CENTRAL SD
Mesoscale Discussion 0452
NWS Storm Prediction Center Norman OK
0646 AM CDT Tue Apr 04 2023
Areas affected...southwest into central SD
Concerning...Heavy snow
Valid 041146Z - 041215Z
SUMMARY...Heavy snowfall rates (1-2 inches per hour) will continue
into the mid morning aided by frontogenesis centered around 650 mb.
DISCUSSION...Radar mosaic during the past few hours has shown a
persistent band of heavier reflectivity from Fall River county
northeastward into Haakon and Stanley counties. The higher
reflectivity (25-35 dBZ) is co-located with ZDR values near 0 and
likely indicates heavy snow. Recent NWS Rapid City observations
indicate snowfall rates to the northwest of the heaviest rates were
ranging 1 to 1.5 inches per hour.
The latest short-term model guidance shows (06z run of the NAM)
shows frontogenetic forcing persisting within this
southwest-northeast oriented corridor through 15z (9am MDT). The
model data indicates the frontogenesis will slowly move north and
roughly extend from near Rapid City east-northeastward towards
Aberdeen by 8am MDT.
..Smith.. 04/04/2023
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...ABR...UNR...
LAT...LON 44110287 44870138 44920090 44750069 44490076 43110329
43120350 43240358 44110287
