SWOD48
SPC AC 200843
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0343 AM CDT FRI APR 20 2012
VALID 231200Z - 281200Z
...DISCUSSION...
AN AMPLIFIED UPPER FLOW REGIME...WITH RIDGING OVER THE WEST AND
TROUGHING OVER THE EAST...APPEARS LIKELY TO PERSIST ACROSS THE U.S.
INTO AT LEAST THE EARLY PART OF NEXT WEEK BEFORE BREAKING DOWN.
ONCE THIS OCCURS...VARIOUS MEDIUM RANGE MODELS/MODEL RUNS HAVE BEEN
SUGGESTIVE THAT A SIGNIFICANT SHORT WAVE IMPULSE EMERGING FROM THE
EASTERN PACIFIC COULD CONTRIBUTE TO INCREASING CONVECTIVE POTENTIAL
ACROSS PORTIONS OF THE SOUTH CENTRAL PLAINS BY NEXT THURSDAY.
HOWEVER...MODEL VARIABILITY CONCERNING THIS FEATURE HAS BEEN...AND
REMAINS...TOO HIGH TO CONFIDENTLY DETERMINE THE POTENTIAL FOR A
REGIONAL SEVERE WEATHER EVENT.
..KERR.. 04/20/2012
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