581
ACUS01 KWNS 181601
SWODY1
SPC AC 181600
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1100 AM CDT TUE SEP 18 2018
VALID 181630Z - 191200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
THE UPPER MIDWEST...
..SUMMARY
ISOLATED HAIL AND DAMAGING WIND GUSTS ARE POSSIBLE TODAY OVER PARTS
OF THE UPPER MIDWEST.
..NE/IA/IL
A PERSISTENT CLUSTER OF THUNDERSTORMS IS AFFECTING MUCH OF NORTHERN
IA AND ADJACENT REGIONS THIS MORNING, WITH THE LEADING-EDGE OUTFLOW
SURGING SOUTHWARD ACROSS EASTERN IA. MUCH OF THIS REGION HAS BEEN
STABILIZED BY THE CONVECTION, LEAVING A CORRIDOR FROM EASTERN NE
INTO NORTHWEST IL WHERE SUFFICIENT HEATING IS POSSIBLE LATER TODAY.
THIS AXIS MAY SEE STORM INTENSIFICATION BY MID/LATE AFTERNOON, WITH
THE STRONGEST CELLS CAPABLE OF HAIL OR LOCALLY DAMAGING WIND GUSTS.
PRESENT INDICATIONS ARE THAT THE SEVERE RISK WILL REMAIN ISOLATED
AND MARGINAL IN NATURE.
..HART/DARROW.. 09/18/2018
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