DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0336 AM CDT SUN APR 15 2012
VALID 181200Z - 231200Z
...DISCUSSION...
BOTH THE GFS AND ECMWF ARE IN GENERAL AGREEMENT THROUGH MID WEEK
REGARDING THE OVERALL PATTERN ACROSS THE CONUS. BEYOND THURSDAY THE
GFS IS CONSIDERABLY MORE AGGRESSIVE IN THE EVOLUTION OF ERN U.S.
TROUGH AS IT DIGS INTO THE MID SOUTH.
PRIOR TO THE AFOREMENTIONED MODEL DIVERGENCE...FLOW WILL INCREASE A
BIT ACROSS THE SRN/CNTRL PLAINS WITHIN THE BASE OF THE PROGRESSIVE
TROUGH. IT APPEARS A FRONTAL SURGE WILL OCCUR ACROSS THE PLAINS
WHICH WILL FORCE A BOUNDARY ACROSS KS INTO OK ON THURSDAY. IF
SUFFICIENT MOISTURE/INSTABILITY CAN ESTABLISH ITSELF ACROSS THIS
REGION BY DAY5 THEN THERE IS SOME CONCERN THAT ROBUST STORMS MAY
DEVELOP ACROSS THIS REGION. HOWEVER...PREDICTABILITY IS A BIT TOO
LOW REGARDING THIS SCENARIO TO WARRANT A SIGNIFICANT SEVERE RISK AT
THIS TIME. BEYOND DAY5 TOO MUCH UNCERTAINTY EXISTS WITHIN THE MODEL
GUIDANCE ACROSS THE GULF STATES TO SUPPORT A SEVERE RISK.
NWS STORM PREDICTION CENTER NORMAN OK
0336 AM CDT SUN APR 15 2012
VALID 181200Z - 231200Z
...DISCUSSION...
BOTH THE GFS AND ECMWF ARE IN GENERAL AGREEMENT THROUGH MID WEEK
REGARDING THE OVERALL PATTERN ACROSS THE CONUS. BEYOND THURSDAY THE
GFS IS CONSIDERABLY MORE AGGRESSIVE IN THE EVOLUTION OF ERN U.S.
TROUGH AS IT DIGS INTO THE MID SOUTH.
PRIOR TO THE AFOREMENTIONED MODEL DIVERGENCE...FLOW WILL INCREASE A
BIT ACROSS THE SRN/CNTRL PLAINS WITHIN THE BASE OF THE PROGRESSIVE
TROUGH. IT APPEARS A FRONTAL SURGE WILL OCCUR ACROSS THE PLAINS
WHICH WILL FORCE A BOUNDARY ACROSS KS INTO OK ON THURSDAY. IF
SUFFICIENT MOISTURE/INSTABILITY CAN ESTABLISH ITSELF ACROSS THIS
REGION BY DAY5 THEN THERE IS SOME CONCERN THAT ROBUST STORMS MAY
DEVELOP ACROSS THIS REGION. HOWEVER...PREDICTABILITY IS A BIT TOO
LOW REGARDING THIS SCENARIO TO WARRANT A SIGNIFICANT SEVERE RISK AT
THIS TIME. BEYOND DAY5 TOO MUCH UNCERTAINTY EXISTS WITHIN THE MODEL
GUIDANCE ACROSS THE GULF STATES TO SUPPORT A SEVERE RISK.
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