653
ACUS01 KWNS 010550
SWODY1
SPC AC 010548
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1248 AM CDT WED APR 01 2026
VALID 011200Z - 021200Z
...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE SOUTHERN AND CENTRAL PLAINS...
..SUMMARY
SEVERE THUNDERSTORMS WITH DAMAGING WIND GUSTS, LARGE HAIL AND A FEW
TORNADOES ARE LIKELY ACROSS THE SOUTHERN AND CENTRAL PLAINS THIS
AFTERNOON AND EVENING. ISOLATED STRONG TO SEVERE STORMS ARE ALSO
POSSIBLE FROM PARTS OF THE OHIO VALLEY, CENTRAL APPALACHIANS AND
MID-ATLANTIC.
..SOUTHERN AND CENTRAL PLAINS
A MID-LEVEL SHORTWAVE TROUGH WILL MOVE QUICKLY EASTWARD ACROSS THE
DESERT SOUTHWEST TODAY AND INTO THE SOUTHERN ROCKIES. AT THE
SURFACE, A MOIST AIRMASS WILL BE IN PLACE ACROSS THE SOUTHERN
PLAINS. A QUASI-STATIONARY FRONT WILL BE LOCATED FROM NEAR CHILDRESS
NORTHEASTWARD INTO SOUTHEAST KANSAS, WITH A DRYLINE EXTENDING
SOUTHWARD INTO WEST-CENTRAL TEXAS. TO THE SOUTHEAST OF THE FRONT,
SURFACE DEWPOINTS IN THE LOWER TO MID 60S F WILL CONTRIBUTE TO
MODERATE INSTABILITY BY AFTERNOON, WITH MLCAPE INCREASING INTO THE
2000 TO 3000 J/KG RANGE. CONVECTIVE INITIATION WILL TAKE PLACE IN
THE LATE AFTERNOON ALONG THE FRONT AND DRYLINE, WITH A BROKEN LINE
OF STRONG TO SEVERE STORMS MOVING EASTWARD ACROSS THE SOUTHERN AND
CENTRAL PLAINS.
IN ADDITION TO A FAVORABLE THERMODYNAMIC ENVIRONMENT, DEEP-LAYER
SHEAR WILL GRADUALLY IMPROVE OVER THE SOUTHERN PLAINS AS THE
MID-LEVEL TROUGH APPROACHES. RAP FORECAST SOUNDINGS IN WESTERN
OKLAHOMA INCREASE 0-6 KM SHEAR FROM ABOUT 25 KNOTS AT 21Z TO NEAR 40
KNOTS AT 00Z, SUGGESTING THAT ENVIRONMENT WILL SUPPORT SUPERCELL
DEVELOPMENT IN THE LATE AFTERNOON. LAPSE RATES IN THE 7 TO 7.5 C/KM
RANGE WILL BE FAVORABLE FOR LARGE HAIL WITH SUPERCELLS, AND
HAILSTONES GREATER THAN 2 INCHES WILL BE POSSIBLE. IN ADDITION, A
TORNADO THREAT IS EXPECTED TO DEVELOP AS LOW-LEVEL SHEAR RAMPS UP
DURING THE LATE AFTERNOON AND EARLY EVENING. ANY SUPERCELL THAT CAN
FORM FAR ENOUGH AWAY FROM OTHER STORMS TO MAINTAIN A RELATIVE LONG
LIFE CYCLE WILL BE FAVORED TO PRODUCE TORNADOES. IF ANY SUPERCELL
CAN BECOME INTENSE, THEN A STRONG TORNADO WILL BE POSSIBLE.
OTHERWISE, CELLS ARE FORECAST TO CONGEAL INTO A LINE AND MOVE
EASTWARD ACROSS NORTHWEST TEXAS, WEST-CENTRAL OKLAHOMA, EASTERN
KANSAS AND WESTERN MISSOURI DURING THE EVENING. THE STRONGER STORMS
WITHIN THIS LINE SHOULD BE ASSOCIATED WITH SEVERE WIND GUSTS AND
ISOLATED LARGE HAIL. A QLCS TORNADO THREAT WILL ALSO BE LIKELY,
ESPECIALLY WITHIN THE MORE INTENSE BOWING LINE SEGMENTS.
FURTHER SOUTH INTO SOUTHWEST TEXAS, ISOLATED SUPERCELLS WITH LARGE
HAIL ARE EXPECTED TO DEVELOP TO THE EAST OF A DRYLINE. THIS THREAT
SHOULD PERSIST INTO THE EARLY TO MID EVENING. A FEW STRONG WIND
GUSTS WILL ALSO BE POSSIBLE.
..OHIO VALLEY/MID-ATLANTIC
WEST-SOUTHWESTERLY MID-LEVEL FLOW WILL BE IN PLACE OVER MUCH OF THE
EASTERN U.S. TODAY. AT THE SURFACE, A QUASI-STATIONARY FRONT WILL BE
LOCATED IN THE OHIO VALLEY FROM SOUTHERN INDIANA EAST-NORTHEASTWARD
INTO FAR SOUTHERN PENNSYLVANIA. SURFACE DEWPOINTS IN THE UPPER 50S
AND LOWER 60S F TO THE SOUTH OF THE FRONT WILL CONTRIBUTE TO WEAK
INSTABILITY BY EARLY AFTERNOON. INCREASING LOW-LEVEL CONVERGENCE
NEAR THE FRONT AND WARMING SURFACE TEMPERATURES WILL RESULT IN
SCATTERED THUNDERSTORMS DURING THE AFTERNOON. SEVERAL SHORT LINE
SEGMENTS ARE EXPECTED TO FORM AND MOVE EASTWARD ACROSS THE OHIO
VALLEY INTO THE CENTRAL APPALACHIANS. 0-6 KM SHEAR IN THE 25 TO 35
KNOT RANGE AND STEEP LOW-LEVEL LAPSE RATES WILL SUPPORT ISOLATED
SEVERE STORMS WITH POTENTIAL FOR DAMAGING WIND GUSTS. A LOW-END
TORNADO THREAT WILL ALSO BE POSSIBLE.
..BROYLES/SQUITIERI.. 04/01/2026
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