901
ACUS48 KWNS 150808
SWOD48
SPC AC 150806
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0306 AM CDT MON SEP 15 2025
VALID 181200Z - 231200Z
..DISCUSSION
AN UPPER LOW/SHORTWAVE TROUGH WILL PERSIST OVER THE NORTH-CENTRAL
U.S. FOR MUCH OF THE PERIOD. THIS SYSTEM IS NOT FORECAST TO DEEPEN,
RESULTING IN LITTLE SURFACE CYCLOGENESIS, WITH MAINLY WEAK SURFACE
TROUGHING PERSISTING OVER THE PLAINS. SOUTHERLY LOW-LEVEL FLOW WILL
MAINTAIN A SEASONALLY MOIST AIRMASS, AND PERIODS OF SHOWERS AND
THUNDERSTORMS ARE EXPECTED EACH DAY ACROSS PARTS OF THE PLAINS TO
THE MS VALLEY. MODEST VERTICAL SHEAR AND AIRMASS MODIFICATION FROM
DAILY ROUNDS OF CONVECTION WILL LIKELY LIMIT OVERALL SEVERE
POTENTIAL.
MEDIUM RANGE GUIDANCE SUGGESTS BY LATE IN THE PERIOD, AROUND DAY
8/MON, A STRONGER SURFACE COLD FRONT MAY SWEEP ACROSS PORTIONS OF
THE PLAINS AS A DEEPENING, MORE PROGRESSIVE UPPER TROUGH MOVES FROM
THE ROCKIES INTO THE PLAINS.
..LEITMAN.. 09/15/2025
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page