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ACUS11 KWNS 230123
SWOMCD
SPC MCD 230122
SDZ000-NEZ000-230245-

Mesoscale Discussion 1140
NWS Storm Prediction Center Norman OK
0822 PM CDT Sun Jul 22 2018

Areas affected...SD...NE

Concerning...Severe Thunderstorm Watch 305...

Valid 230122Z - 230245Z

The severe weather threat for Severe Thunderstorm Watch 305
continues.

SUMMARY...Scattered strong/severe thunderstorms will continue along
a corridor from central SD into southwest NE for the next few hours.

DISCUSSION...Scattered convection continues to remain concentrated
along a surface front that is progressing slowly southeast across
ww305. Strongest instability remains confined to roughly a 50mi wide
corridor along/just east of the wind shift. MRMS data suggests large
hail is common with the strongest updrafts, especially with the
supercell that is digging south across Perkins County NE. Latest
trends suggest convection will continue propagating south along this instability axis with hail remaining the primary threat.

..Darrow.. 07/23/2018

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

ATTN...WFO...FSD...ABR...LBF...UNR...

LAT...LON 41070185 45850024 45849776 41099954 41070185



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