MESO: Mesoscale Discussion 0675

ACUS11 KWNS 040055
SWOMCD
SPC MCD 040055
MSZ000-LAZ000-ARZ000-040230-

MESOSCALE DISCUSSION 0675
NWS STORM PREDICTION CENTER NORMAN OK
0755 PM CDT THU MAY 03 2007

AREAS AFFECTED...NWRN MS

CONCERNING...TORNADO WATCH 222...

VALID 040055Z - 040230Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 222 CONTINUES.

REMNANT HEAD OF THE BOW ECHO THAT MATURED OVER SERN AR/NERN LA
APPEARS TO BE TRACKING NEWD INTO COAHOMA COUNTY MS AT 0045Z. THIS
FEATURE SEEMS TO BE TIED TO A LARGER SCALE MCV ROTATING NEWD ALONG
THE MS RVR VLY ALONG AN OLD SYNOPTIC BOUNDARY THAT EXTENDS NORTH TO
THE OH/MS RVR CONFLUENCE. COLLECTIVE COLD POOLS HAVE STRENGTHENED
THE BOUNDARY AND SURGED EWD INTO NWRN MS IN A SEGMENTED FASHION.
LEADING EDGE OF THESE COLD POOLS HAVE BEEN IMPETUS FOR NEW UPDRAFTS
WITHIN A CORRIDOR OF UNSTABLE/UNTOUCHED AIR. THIS CORRIDOR IS QUITE
NARROW...BEING MODULATED BY OUTFLOW AIR EMANATING FROM THE
COLLAPSING MCS OVER ECNTRL MS. THIS SHOULD KEEP THE SVR THREAT
SOMEWHAT LIMITED OVER THE REMAINDER OF THE TORNADO WATCH IN NWRN MS
THROUGH MID-EVENING AS PRIMARY BELT OF WLYS ASSOCD WITH THE UPR LOW
SPREADS EWD THROUGH SRN LA. WHAT THREAT DOES EXIST SHOULD BE
LIMITED TO DAMAGING WINDS AND ISOLD BRIEF SPIN-UPS.

.RACY.. 05/04/2007

..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...MEG...JAN...

32669117 33629104 34809032 34908974 34708942 34098964
33458991 32679039

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