MD 0102 CONCERNING HEAVY SNOW FOR SOUTHERN PORTIONS OF IL…IN…AND OH
Mesoscale Discussion 0102
NWS Storm Prediction Center Norman OK
1144 PM CST Tue Jan 24 2023
Areas affected...southern portions of IL...IN...and OH
Concerning...Heavy snow
Valid 250544Z - 251145Z
SUMMARY...Broad precipitation will continue to overspread the region
from around 06-12z. Localized heavy snowfall rates greater than
1"/hr will be possible.
DISCUSSION...The low-level precipitation field continues to expand
in advance of a negatively tilted upper-level trough ejecting over
the central CONUS. Snowfall rates of 1"/hr have been reported from
eastern OK northeastward through southeastern MO, and in some areas
localized snowfall rates around 2"/hr have been observed. The broad
precipitation band responsible for these snowfall rates continues to
translate northeastward in tandem with 700-mb frontogenesis and
mesoscale isentropic ascent. These features are expected to persist
for the next several hours and produce 1"/hr snowfall rates through
12z, generally advancing from west to east across the outlined area.
Snowfall rates of 2"/hr or greater will be possible in localized
areas where enhanced forcing overlaps non-zero potential buoyancy
(10-20 J/kg MUCAPE) in the dendritic growth zone.
..Flournoy/Moore.. 01/25/2023
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...PBZ...RLX...CLE...ILN...LMK...IWX...IND...PAH...
ILX...LSX...
LAT...LON 37198956 37399036 37929051 38469002 39188841 39818684
40478462 40608266 40298174 39718176 39148221 38908311
38748421 38478545 38188653 37648835 37198956
