245
ACUS03 KWNS 260617
SWODY3
SPC AC 260616
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0116 AM CDT MON OCT 26 2026
VALID 281200Z - 291200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
SEVERE THUNDERSTORM POTENTIAL APPEARS LOW ON WEDNESDAY.
..SYNOPSIS
A LOW-AMPLITUDE WEST/SOUTHWESTERLY UPPER-LEVEL FLOW REGIME WILL
OVERSPREAD MUCH OF THE CONUS ON WEDNESDAY. STRONGER WESTERLIES WILL
EXTEND FROM THE PACIFIC NORTHWEST TO THE GREAT LAKES, WEAKENING WITH
SOUTHWARD EXTENT. SURFACE HIGH PRESSURE WILL BE FOCUSED OVER THE
EASTERN U.S., WHILE MODEST SURFACE TROUGHING EXTENDS FROM THE UPPER
MIDWEST TO THE SOUTHERN HIGH PLAINS. SOUTH/SOUTHWESTERLY LOW-LEVEL
FLOW WILL TRANSPORT MODEST BOUNDARY LAYER MOISTURE NORTHWARD ACROSS
PORTIONS OF THE SOUTHERN/CENTRAL PLAINS AND INTO THE UPPER MS
VALLEY. ISOLATED THUNDERSTORM ACTIVITY WILL BE POSSIBLE WITHIN THIS
PLUME OF MODEST MOISTURE AND WEAK DESTABILIZATION. ANY STRONGER
INSTABILITY IS FORECAST TO BE ACROSS THE SOUTHERN PLAINS,
PARTICULARLY TX, WHERE DEEPER MOISTURE WILL BE IN PLACE (COMPARED TO
FURTHER NORTH). HOWEVER, WEAK VERTICAL SHEAR AND A LACK OF FOCUSED
ASCENT WILL LIMIT SEVERE POTENTIAL. FURTHER NORTH ACROSS THE UPPER
MIDWEST, INSTABILITY WILL BE WEAKER GIVEN A COOLER AND LESS MOIST
AIRMASS, PRECLUDING SEVERE POTENTIAL, DESPITE STRONGER DEEP-LAYER
WEST/SOUTHWESTERLY FLOW.
..LEITMAN.. 10/26/2026
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