|Mesoscale Discussion 1301|
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Mesoscale Discussion 1301
NWS Storm Prediction Center Norman OK
0936 PM CDT Wed Jul 12 2017
Areas affected...northeast Wisconsin and northwest lower Michigan
Concerning...Severe Thunderstorm Watch 411...
Valid 130236Z - 130400Z
The severe weather threat for Severe Thunderstorm Watch 411
SUMMARY...While a couple strong wind gusts and hail remain possible
with storms moving through northeast WI next hour or two. Overall
threat is expected to gradually diminish by WW expiration time of
DISCUSSION...Storms moving through northeast WI are not particularly
organized. The 00Z Green Bay sounding indicates around 1500 J/kg
MLCAPE and 38 kt 0-6 km shear. However, weak mid-level lapse rates,
and an inversion present around 850 mb suggest updrafts should
gradually weaken as the boundary layer stabilizes and convective
inhibition increases. Activity may continue across Lake MI and into
the Lower Peninsula of MI. However, the increasingly marginal
thermodynamic environment suggests most storms should remain below
severe levels, and another WW is not anticipated.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 45188750 44458569 43868599 43878885 44598853 45178826
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