Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 290140
SWOMCD
SPC MCD 290139
MOZ000-IAZ000-NEZ000-290315-

Mesoscale Discussion 1179
NWS Storm Prediction Center Norman OK
0839 PM CDT Wed Jun 28 2017

Areas affected...Southern IA...Northern MO

Concerning...Tornado Watch 375...

Valid 290139Z - 290315Z

The severe weather threat for Tornado Watch 375 continues.

SUMMARY...Severe threat remains bimodal across Tornado Watch 375
with the southern-most threat now concentrated along the IA/MO
border.

DISCUSSION...East-west MCS has evolved along the IA/MO border over
the last few hours and this activity is only slowly sagging south
across the southern-most portion of WW375. Short-range models
suggest a veered LLJ will feed this activity and decoupling may
actually encourage new development along the western flank of this
MCS. If a sufficient cold pool can evolve the MCS may sag into
Livingston/Linn/Macon Counties MO. These counties may be added to
Tornado Watch 375 but the greatest severe risk is actually large
hail and heavy rain.

..Darrow.. 06/29/2017

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

ATTN...WFO...LSX...DVN...DMX...EAX...OAX...

LAT...LON   40689541 40849406 40529190 39879223 39999424 40069568
            40689541



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