ZCZC SPCSWOMCD ALL
ACUS11 KWNS 171812 
SPC MCD 171812 
PAZ000-WVZ000-OHZ000-MIZ000-INZ000-171945-

Mesoscale Discussion 0472
NWS Storm Prediction Center Norman OK
0112 PM CDT Wed Apr 17 2024

Areas affected...extreme eastern IN...much of OH...and western PA

Concerning...Tornado Watch 122...

Valid 171812Z - 171945Z

The severe weather threat for Tornado Watch 122 continues.

SUMMARY...Storms moving into northwest OH may intensify the next 1-2
hours. All severe hazards remain possible across Tornado Watch 122.
A downstream watch will likely be needed in the next couple of hours
across eastern OH into western PA.

DISCUSSION...Convection has slowly intensified into early afternoon
as storms move into a somewhat more unstable airmass. Stronger
heating has allowed low-level lapse rates to steepen ahead of the
line of convection. This will support potential for increasing
gusts. Furthermore, low-level instability remains quite large, with
0-3 km MLCAPE greater than 125 J/kg. Regional VWP data shows
enlarged, and favorably curved low-level hodographs, and low-level
rotation has been noted in velocity signatures via region radars.
Further intensification of these cells is expected over the next
couple hours across northwest into central Ohio. 

As convection continues eastward, a similar environment is expected
to extend across parts of eastern OH into western PA. A downstream
watch will likely be needed by 20z/4pm EDT.

..Leitman.. 04/17/2024

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

ATTN...WFO...PBZ...RLX...CLE...ILN...DTX...IWX...IND...

LAT...LON   39348363 39508478 39688521 40048524 40988496 41668463
            41988007 40957978 39798025 39418115 39288274 39348363 

NNNN