Mesoscale Discussion 0753
NWS Storm Prediction Center Norman OK
0631 PM CDT Wed May 17 2017
Areas affected...Central/East-central WI
Concerning...Tornado Watch 233...
Valid 172331Z - 180100Z
The severe weather threat for Tornado Watch 233 continues.
SUMMARY...Severe threat is expected to continue across central and
east-central WI for the next few hours. All severe hazards,
including tornadoes, are possible.
DISCUSSION...Current (2315Z) radar imagery shows several supercells
embedded in the southern portion of the convective line moving
northeastward across central WI. Recent surface analysis places the
warm front near RGK east-northeastward to north of MNM.
Thermodynamic environment along and north of this front is only
weakly unstable with convective inhibition building over the past
hour. However, the thermodynamic environment south of the front,
which includes much of central and east-central WI, is characterized
by temperatures in the mid to upper 70s, dewpoints in the low to mid
60s, and MLCAPE over 1000 J/kg (per the latest mesoanalysis). The
immediate downstream kinematic environment is characterized by a
veering wind profile composed of relatively weak southeasterly
surface winds increasing to over 40 kt from the south-southwest at
850 mb and over 60 kt from the southwest at 500mb. Overall, the
downstream environment across central and east-central WI is
supportive of a continued severe threat for at least the next few
hours. All severe hazards, including tornadoes, are possible across
the remainder of Tornado Watch 223.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 43138893 43298986 44419093 45129176 45469168 45669072
45478932 44648836 43728830 43138893