Severe Storm Outlook Narrative (AC)
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110
ACUS11 KWNS 191938
SWOMCD
SPC MCD 191938
WIZ000-IAZ000-MNZ000-192145-

Mesoscale Discussion 1351
NWS Storm Prediction Center Norman OK
0238 PM CDT Wed Jul 19 2017

Areas affected...Portions of southeast MN...southwest WI...northeast
IA

Concerning...Severe potential...Severe Thunderstorm Watch likely

Valid 191938Z - 192145Z

Probability of Watch Issuance...95 percent

SUMMARY...A compact convective system is spreading
eastward/east-southeastward across MN with accompanying severe
wind/hail potential. The issuance of a Severe Thunderstorm Watch
downstream of Watch 420 is forthcoming.

DISCUSSION...A compact, bowing MCS across southern MN is moving
eastward to east-southeastward around 50 kt. This activity has
recently attained more of a southward component to its motion, as
the air mass continues to strongly destabilize near and south of a
warm-frontal zone along which this system is tracking. This activity
has a history of producing severe wind gusts, and will pose severe
wind/hail potential as it spreads downstream of Severe Thunderstorm
Watch 420. Additional details regarding the evolution of this system
are contained in Mesoscale Discussion 1348, and will be contained
within a forthcoming MCD.

..Cohen/Coniglio/Hart.. 07/19/2017

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...ARX...

LAT...LON   42959174 43099272 43899282 43989204 43819094 43419067
            43059106 42959174




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