Day 3
ODEL FORECASTS VARY CONCERNING THE EXACT POSITION OF THE STRONGEST
INSTABILITY ON WEDNESDAY. THE LATEST ECMWF SEEMS TO BE CLOSE TO
CONSENSUS, WITH MLCAPE INCREASING INTO THE 1000 TO 2000 J/KG RANGE
FROM EAST OF LUBBOCK TO NEAR LAWTON. THIS LOCATION WILL BE JUST TO
THE EAST OF THE MID-LEVEL JET, WHICH WILL PROVIDE DEEP-LAYER SHEAR
FAVORABLE FOR SEVERE THUNDERSTORM DEVELOPMENT. FORECAST SOUNDINGS AT
21Z NEAR THE FORECAST INSTABILITY AXIS HAVE 0-6 KM SHEAR AROUND 40
KNOTS, WHICH WILL SUPPORT SUPERCELLS WITH A THREAT OF WIND DAMAGE
AND HAIL. ALTHOUGH STORM DEVELOPMENT MAY INITIALLY BE DISCRETE, A
LINE IS EXPECTED TO FORM AS CONVECTIVE COVERAGE FILLS THE EAST OF
THE DRYLINE. THIS LINE WILL BE CAPABLE OF WIND DAMAGE. DURING THE
EARLY EVENING, 0-3 KM STORM-RELATIVE HELICITY IS FORECAST TO
INCREASE INTO THE 200 TO 250 M2/S2 RANGE, SUGGESTING THAT A TORNADO
THREAT WILL ALSO DEVELOP WITH EMBEDDED ROTATING STORMS IN THE LINE.
ANY SEVERE THREAT SHOULD PERSIST INTO THE MID TO LATE EVENING AS THE
LINE MOVES EASTWARD ACROSS CENTRAL OKLAHOMA AND CENTRAL TO SOUTHWEST
TEXAS.