MD 1951 CONCERNING HEAVY SNOW FOR CENTRAL INTO NORTHEAST IN…WEST-CENTRAL AND NORTHWEST OH
Mesoscale Discussion 1951
NWS Storm Prediction Center Norman OK
0810 AM CST Sat Nov 12 2022
Areas affected...central into northeast IN...west-central and
northwest OH
Concerning...Heavy snow
Valid 121410Z - 121645Z
SUMMARY...Heavy snowfall rates around 1 inch/hour expected for a 1-2
hour duration through the late morning.
DISCUSSION...Radar mosaic shows an expanding precipitation shield
over the OH Valley and southern Great Lakes as of 9am EST. The ASOS
at Shelbyville, IN (KGEZ) recently observed heavy snow at 846am and
1/4 mi visibility. This precipitation is occurring immediately
downstream of an east-northeastward migrating mid-level shortwave
trough located over the lower OH Valley. A zone of appreciable
700-600 mb frontogenesis has become more diffuse than earlier this
morning over south-central IL, but large-scale ascent will maximize
over the OH Valley/southern Great Lakes through midday. The 12 UTC
Detroit raob showed a temperature profile that will support snow
once the column saturates---this will be applicable for northwest OH
in the 9-10am period. Smaller-scale banding is evident on radar
this morning over central IN and this will lead to episodic bursts
of heavy snowfall rates around 1 inch/hour. The moderate to heavy
snowfall rates will gradually shift from west to east across IN and
eventually into OH by late morning.
..Smith.. 11/12/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CLE...ILN...IWX...IND...
LAT...LON 39698652 40768627 41448474 41228394 40768376 40368402
39458567 39698652
