SWODY2
SPC AC 270454
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1054 PM CST MON DEC 26 2011
VALID 281200Z - 291200Z
...NO TSTM AREAS FORECAST...
...SYNOPSIS...
MID-UPPER LEVEL HEIGHT FALLS ARE UNDERWAY AHEAD OF AMPLIFYING
NRN-STREAM TROUGH OVER CENTRAL/NRN PLAINS...CONTRIBUTING TO EWD
ACCELERATION OF INVETERATE MID-UPPER LOW CURRENTLY OVER ARKLATEX
REGION. SRN-STREAM PERTURBATION WILL DEAMPLIFY AND MOVE OFFSHORE
DAY-1...WHILE NRN-STREAM SYSTEM DIGS SEWD TOWARD CAROLINAS THEN
PIVOTS EWD OVER ATLC. AS THIS OCCURS...STRENGTHENING SFC CYCLONE
WILL MOVE NEWD OVER INLAND MID-ATLC REGION...MOVING NEWD DOWN ST
LAWRENCE RIVER REGION EARLY DAY-2. TRAILING COLD FRONT WILL SWEEP
OFFSHORE ALL BUT PORTIONS ERN NEW ENGLAND BY 28/12Z. THAT PORTION
OF WARM SECTOR CONTAINING ENOUGH INSTABILITY TO SUPPORT TSTMS SHOULD
BE OFFSHORE CAPE COD BY START OF PERIOD. ELSEWHERE...IN WAKE OF
FRONT...AIR MASSES WILL REMAIN TOO DRY AND/OR STABLE FOR TSTMS.
..EDWARDS.. 12/27/2011
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