DAY48SVR: Nws Storm Prediction Center Norman Ok

ACUS48 KWNS 270849
SWOD48
SPC AC 270848

DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0348 AM CDT FRI SEP 27 2013

VALID 301200Z - 051200Z

...DISCUSSION...
A RELATIVELY STRONG BELT OF WSWLY FLOW ALOFT IS FORECAST TO EXTEND
FROM THE NWRN U.S. INTO THE NRN PLAINS...WITH INTENSE LEADING
SHORTWAVE TROUGH TRAVERSING THE NRN ROCKIES ON MON/D4. THIS TROUGH
WILL HAVE LITTLE MOISTURE TO WORK WITH AND SEVERE WEATHER WILL NOT
OCCUR.

FLOW BECOMES LESS AMPLIFIED ON D5-D6 ACROSS THE SAME GENERAL AREA IN
THE WAKE OF THE EARLIER TROUGH. THEN...IN THE D7-D8 TIME
FRAME...MODELS SUGGEST A MAJOR TROUGH AMPLIFICATION ACROSS THE
W...DRIFTING INTO THE PLAINS BY D8. WHILE UNCERTAINLY EXISTS...IT
DOES APPEAR THAT THIS TROUGH WILL BE POSITIVELY TILTED AND
RELATIVELY SLOW MOVING. THUS...WHILE SOME SEVERE WEATHER MAY
EVENTUALLY OCCUR OVER PORTIONS OF THE PLAINS...IT DOES NOT APPEAR TO
HAVE ANY HIGH END POTENTIAL.

..JEWELL.. 09/27/2013

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