Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 182231
SWOMCD
SPC MCD 182231
KSZ000-OKZ000-NEZ000-182330-

MESOSCALE DISCUSSION 0361
NWS STORM PREDICTION CENTER NORMAN OK
0531 PM CDT SAT APR 18 2015

AREAS AFFECTED...KS...SCNTRL NEBRASKA

CONCERNING...SEVERE THUNDERSTORM WATCH 74...

VALID 182231Z - 182330Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 74
CONTINUES.

SUMMARY...SEVERE THREAT MAY GRADUALLY EXPAND EAST OF WW74.  NEW WW
MAY BE REQUIRED TO ACCOUNT FOR THIS EVOLUTION.

DISCUSSION...IT APPEARS AN MCS IS SLOWLY EVOLVING ACROSS
CNTRL/SCNTRL KS THIS EVENING.  SCT CONVECTION THAT WAS DIURNALLY
DRIVEN CONTINUES TO EXPAND AND MERGE INTO A LARGER CLUSTER OF
STORMS.  WITH TIME CONVECTIVE OUTFLOW...AIDED BY LARGE SCALE
TROUGH...SHOULD ENCOURAGE THIS MCS TO SHIFT EAST OF WW74.  LATEST
WDSSII DATA SUGGESTS LARGE HAIL ACCOMPANIES THE STRONGEST ACTIVITY
AND THIS APPEARS TO BE THE MAIN THREAT.

..DARROW/CORFIDI.. 04/18/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...TOP...ICT...OUN...GID...LBF...DDC...GLD...

LAT...LON   36949983 41050034 41049801 36949766 36949983



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