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Mesoscale Discussion 102 |
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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
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