SWODY3
SPC AC 240735
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0235 AM CDT TUE APR 24 2007
VALID 261200Z - 271200Z
..THERE IS A SLGT RISK OF SVR TSTMS FROM PARTS OF THE SERN STATES
THROUGH THE OH VALLEY...
..SYNOPSIS...
UPPER TROUGH IS FORECAST TO EJECT NEWD THROUGH THE TN AND OH VALLEYS
THURSDAY. AS ATTENDANT SURFACE LOW LIFTS NEWD INTO THE GREAT LAKES
REGION...TRAILING COLD FRONT WILL MOVE EAST AND EXTEND FROM THE OH
VALLEY SWWD THROUGH THE APPALACHIANS INTO THE SWRN GULF COAST REGION
BY THE END OF THIS PERIOD. A WARM FRONT EXTENDING EWD FROM THE LOW
WILL LIFT NWD THROUGH THE OH VALLEY AND MID ATLANTIC.
..SERN U.S. THROUGH THE OH VALLEY...
SCATTERED STORMS WILL LIKELY CONTINUE ALONG WARM CONVEYOR BELT IN
PRE-FRONTAL WARM SECTOR AND SHIFT EWD AND NEWD THROUGH THE SERN
STATES AND OH VALLEY DURING THE DAY. POSSIBLE LIMITING FACTOR FOR A
MORE ROBUST SEVERE THREAT COULD BE EXPECTED MARGINAL THERMODYNAMIC
ENVIRONMENT OVER MUCH OF THE AREA GIVEN POTENTIAL FOR WIDESPREAD
CLOUDS AND MODEST LAPSE RATES. HOWEVER...KINEMATIC FIELDS WILL
REMAIN SUFFICIENT FOR A THREAT OF ORGANIZED STORM STRUCTURES
INCLUDING SUPERCELLS AND BOW ECHOES.
OTHER STORMS MAY DEVELOP FARTHER W OVER PARTS OF THE MID MS OR OH
VALLEY SWD INTO THE TN VALLEY IN DRY SLOT REGION ALONG COLD FRONT
AND CLOSER TO UPPER LOW CENTER. STEEPER LAPSE RATES WILL LIKELY
EXIST AND SURFACE HEATING WILL BE MORE PROBABLE IN THESE REGIONS.
ISOLATED DAMAGING WIND AND HAIL WILL BE THE MAIN THREATS WITH THIS
ACTIVITY THROUGH EARLY EVENING.
.DIAL.. 04/24/2007
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