603
ACUS48 KWNS 170850
SWOD48
SPC AC 170848
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0348 AM CDT THU SEP 17 2026
VALID 201200Z - 251200Z
..DISCUSSION
THE LATEST ECENS AND GEFS APPEAR SIMILAR IN THEIR DEPICTION OF THE
EVOLVING MID/UPPER FLOW LATE THIS WEEKEND THROUGH THE MIDDLE OF NEXT
WEEK. A WEAK MID-LEVEL TROUGH AND EMBEDDED LOW EMERGING FROM THE
INTERMOUNTAIN WEST MAY WEAKEN FURTHER WHILE SLOWLY PROGRESSING
ACROSS THE CENTRAL GREAT PLAINS THROUGH OHIO VALLEY, TO THE SOUTH OF
A TRANSIENT BUILDING MID-LEVEL HIGH NEAR THE CENTRAL CANADIAN/U.S.
BORDER INTO THE UPPER GREAT LAKES/NORTHWESTERN ONTARIO VICINITY.
TOWARD THE MIDDLE TO LATTER PART OF NEXT WEEK, REMNANT MID-LEVEL
TROUGHING MAY TEND TO DIG INTO AND ACROSS THE MID ATLANTIC, AS
MID-LEVEL RIDGING BUILDS AGAIN ACROSS THE GREAT PLAINS/MISSISSIPPI
VALLEY, DOWNSTREAM OF A WEAK MID-LEVEL PERTURBATION PROGRESSING INTO
THE SOUTHWEST, AND AMPLIFYING TROUGHING WITHIN THE STRONGER
WESTERLIES OFFSHORE OF THE PACIFIC COAST.
IN ASSOCIATION WITH THIS EVOLVING REGIME, GENERALLY WEAK DEEP-LAYER
MEAN WIND FIELDS AND INCREASINGLY LIMITED POTENTIAL FOR STRONGER
DESTABILIZATION ARE LIKELY TO MINIMIZE THE RISK FOR SEVERE WEATHER.
..KERR.. 09/17/2026
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page