SPC MD 749
SPC MD 749
[html]MD 0749 CONCERNING SEVERE POTENTIAL...WATCH UNLIKELY FOR PORTIONS OF NORTHWESTERN ILLINOIS INTO FAR SOUTH-CENTRAL WISCONSIN
Mesoscale Discussion 0749
NWS Storm Prediction Center Norman OK
0253 PM CDT Fri May 13 2022
Areas affected...Portions of northwestern Illinois into far
south-central Wisconsin
Concerning...Severe potential...Watch unlikely
Valid 131953Z - 132130Z
Probability of Watch Issuance...5 percent
SUMMARY...Isolated wind damage and small hail are possible should a
storm initiate/mature this afternoon. No watch is expected.
DISCUSSION...Strong heating ahead of a cold front has promoted
deepening cumulus from northwestern Illinois. Along with this
heating, though, dewpoints have also mixed into the upper 50s to low
60s F. Convergence along the front is also rather weak, though the
deepest cumulus has developed southwest of Rockford where
convergence is locally higher. Currently, it seems probable that a
storm or two could develop within the next 1-3 hours. Effective
shear is weak (around 20 kts) with the stronger mid-level winds
displaced to the northwest. The 18Z DVN sounding does show steep
mid/low-level lapse rates. Should a storm mature, isolated wind
damage and possible small hail would be possible. A watch is not
expected.
..Wendt/Grams.. 05/13/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LOT...ILX...MKX...DVN...
LAT...LON 42688933 42588914 42058910 40978938 40808975 40929020
41509023 42139013 42439011 42738992 42758964 42688933
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Source: SPC MD 749 (http://ht**://www.spc.noaa.gov/products/md/md0749.html)