ZCZC SPCSWOMCD ALL
ACUS11 KWNS 141645 
SPC MCD 141645 
WIZ000-ILZ000-IAZ000-MNZ000-141845-

Mesoscale Discussion 1280
NWS Storm Prediction Center Norman OK
1145 AM CDT Wed Jul 14 2021

Areas affected...eastern Iowa...southern Wisconsin

Concerning...Severe Thunderstorm Watch 377...

Valid 141645Z - 141845Z

The severe weather threat for Severe Thunderstorm Watch 377
continues.

SUMMARY...The threat for isolated strong gusts or marginal hail
continues mainly from northeast Iowa into southwest Wisconsin. It is
unclear if another watch will be needed in the short term.

DISCUSSION...A north-south oriented band of storms continues
eastward across the watch and is now crossing the MS River. This
activity is associated with the leading warm advection ahead of the
midlevel wave, with veered low-level winds across central IA feeding
instability eastward. 

Objective analysis shows less instability ahead of the system
compared to farther west, but continued theta-e advection and areas
of filtered sunshine may aid destabilization enough for some of this
activity to become severe. While an additional watch is not
anticipated in the near term downstream of this ongoing line, trends
will continue to be monitored for strengthening.

..Jewell.. 07/14/2021

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

ATTN...WFO...GRB...LOT...MKX...DVN...ARX...

LAT...LON   44009182 44398875 44278832 43928802 43328783 42908769
            42578772 42338785 42088848 41949035 42009112 42129139
            42599134 43139136 43649174 43899184 44009182 

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