ZCZC SPCSWOMCD ALL
ACUS11 KWNS 152158 
SPC MCD 152158 
MNZ000-WIZ000-152330-

Mesoscale Discussion 1481
NWS Storm Prediction Center Norman OK
0458 PM CDT Mon Jul 15 2019

Areas affected...Portions of MN and western WI

Concerning...Severe Thunderstorm Watch 509...

Valid 152158Z - 152330Z

The severe weather threat for Severe Thunderstorm Watch 509
continues.

SUMMARY...Both damaging winds and large hail will remain possible
with storms across Severe Thunderstorm Watch 509 this evening.

DISCUSSION...A line of convection approaching western Lake Superior
in the MN Arrowhead will remain capable of producing damaging winds
in the short term. Farther south, a cluster of storms has developed
ahead of a cold front just to the northwest of the Twin Cities.
Although mid-level flow gradually weakens with southward extent
across MN, around 25-30 kt of effective bulk shear will still
promote multicells capable of producing both large hail and strong
to locally damaging winds. Severe Thunderstorm Watch 509 has been
expanded southward to include more of central/southern MN to account
for this recent convective development. Additional storms may also
form along the cold front through this evening, with mainly a
damaging wind threat given a predominately linear mode expected.

..Gleason.. 07/15/2019

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

ATTN...WFO...DLH...MPX...FGF...

LAT...LON   46019563 46119409 47219281 48149051 48018960 46679049
            45399096 44669099 44609208 44369314 44399449 45009606
            45189605 46019563 

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