110
ACUS03 KWNS 060622
SWODY3
SPC AC 060621
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0121 AM CDT SUN SEP 06 2026
VALID 081200Z - 091200Z
...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FROM NEBRASKA TO
THE UPPER MIDWEST...
..SUMMARY
STRONG TO SEVERE STORMS ARE POSSIBLE ON TUESDAY FROM NEBRASKA INTO
THE UPPER MIDWEST.
..CENTRAL PLAINS TO UPPER MIDWEST
AN UPPER TROUGH WILL MOVE FROM THE NORTHERN PLAINS TO THE GREAT
LAKES ON TUESDAY. AS THIS OCCURS, A SWATH OF ENHANCED DEEP-LAYER
SOUTHWESTERLY FLOW WILL OVERSPREAD THE UPPER MIDWEST. AT THE
SURFACE, LOW PRESSURE OVER MANITOBA WILL CONTINUE EAST/NORTHEAST
THROUGH THE PERIOD, WITH A TRAILING COLD FRONT SWEEPING EAST ACROSS
THE NORTHERN/CENTRAL PLAINS AND UPPER MS VALLEY. A MOIST AIRMASS
WILL BE IN PLACE AHEAD OF THE FRONT, AND WEAK TO MODERATE
DESTABILIZATION IS FORECAST. DEEP-LAYER FLOW WILL LARGELY REMAIN
PARALLEL TO THE SURFACE BOUNDARY, BUT SUFFICIENT SHEAR WILL BE
PRESENT FOR SOME STORM ORGANIZATION. THE NORTH AND EAST EXTENT OF
SEVERE POTENTIAL IS A BIT UNCERTAIN GIVEN CONCERN OVER
INHIBITION/TIMING AND MODEST INSTABILITY. HOWEVER, GIVEN THE
STRENGTH OF DEEP-LAYER SOUTHWESTERLY FLOW, SOME SEVERE RISK SHOULD
EXTEND ALONG THE LENGTH OF THE SURFACE FRONT FROM THE UPPER MIDWEST
INTO THE CENTRAL PLAINS. DAMAGING WIND AND HAIL WILL BE THE PRIMARY
CONCERN WITH THIS ACTIVITY FROM LATE AFTERNOON INTO THE NIGHTTIME
HOURS.
..LEITMAN.. 09/06/2026
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