MD 2065 CONCERNING SNOW SQUALL FOR FAR EASTERN ILLINOIS INTO INDIANA…WESTERN KENTUCKY…FAR SOUTHERN MICHIGAN…AND FAR WESTERN OHIO
Mesoscale Discussion 2065
NWS Storm Prediction Center Norman OK
0339 PM CST Thu Dec 22 2022
Areas affected...Far eastern Illinois into Indiana...western
Kentucky...far southern Michigan...and far western Ohio
Concerning...Snow Squall
Valid 222139Z - 230145Z
SUMMARY...The potential for brief/localized snow squalls will shift
into Indiana, northwest Kentucky, and western Ohio through the
evening hours as a strong cold front continues to push east.
DISCUSSION...A strong cold front continues to push east across IN
based on latest surface observations, and a broad region of
post-frontal light to moderate snowfall remains evident from Lake
Michigan southward into northern AR. Web cams and surface
observations show pockets of reduced visibility down to 1/2 to 1/4
mile where moderate snowfall is coincident with 20-25 knot winds
(gusting to 30-35 knots) across eastern IL. These winds are slightly
stronger (around 5 knots on average) than depicted by latest
guidance, and are expected to spread east into IN, parts of KY, and
western OH behind the surface front through 02 UTC. Surface pressure
falls in the absence of a strong warm advection regime across the
Great Lakes region hint that synoptic ascent is increasing as the
upper jet noses into the lower MS River Valley. Consequently,
post-frontal precipitation will likely increase as well over the
next several hours.
The combination of gusty surface winds and pockets of moderate
snowfall will maintain the potential for brief, sporadic snow
squalls with reduced visibility down to 1/4 mile. Snow squalls may
be more impactful across parts of far northwest KY into central IN
where light rainfall ahead of the cold front followed by a rapid
onset of freezing temperatures may result in flash freezing
coincident with the brief snow squall conditions.
..Moore.. 12/22/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...ILN...LMK...IWX...GRR...IND...PAH...LOT...ILX...
LAT...LON 37548937 38158861 38878804 39748774 41578768 41878738
42198582 41988475 41668445 38478451 37488552 36978699
36858806 36968896 37148933 37548937
