AREAS AFFECTED…CNTRL AND NE MS…NW AL
CONCERNING…SEVERE THUNDERSTORM WATCH 108…
SUMMARY…TORNADO THREAT IS EXPECTED TO CONTINUE TO INCREASE LATE
THIS AFTERNOON AS NUMEROUS TORNADIC SUPERCELLS DEVELOP ACROSS PDS
TORNADO WATCH 108. THE AREA FROM CNTRL MS EXTENDING NEWD INTO NW AL
WILL BE UPGRADED TO HIGH RISK AT THE 20Z OUTLOOK.
DISCUSSION…SUPERCELL THUNDERSTORMS ARE CONTINUING TO DEVELOP
ACROSS CNTRL AND NRN MS THIS AFTERNOON IN RESPONSE TO STRONG UPLIFT
AND DESTABILIZATION. THE ENVIRONMENT IS CHARACTERIZED BY MODERATE
INSTABILITY…STRONG DEEP LAYER SHEAR AND SUBSTANTIAL LOW-LEVEL
SHEAR. THE WSR-88D VWPS IN CNTRL AND NRN MS SHOW LOOPED HODOGRAPHS
WITH 0-3 KM STORM RELATIVE HELICITIES IN THE 450 TO 500 M2/S2 RANGE.
THIS SHOULD SUPPORT A THREAT FOR STRONG TORNADOES AS SUPERCELLS
CONTINUE TO INTENSIFY. DUE TO THIS IMPRESSIVE SHEAR ENVIRONMENT…AN
OUTBREAK OF TORNADOES APPEARS LIKELY AND THE AREA FROM CNTRL MS
EXTENDING NEWD INTO NW AL WILL BE UPGRADED TO HIGH RISK FOR THE 20Z
OUTLOOK.
