DAY 4-8 CONVECTIVE OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0355 AM CST SUN DEC 27 2015 VALID 301200Z - 041200Z ...DISCUSSION... A BROADENING UPPER TROUGH IS PROGGED TO EVOLVE ACROSS THE U.S. THIS PERIOD...WITH CYCLONIC FLOW TO ENCOMPASS MUCH OF THE U.S. THROUGH MOST OF THE PERIOD. WITH COOL/CONTINENTAL AIR TO PREVAIL AT THE SURFACE ACROSS THE MAJORITY OF THE COUNTRY...SEVERE RISK APPEARS MINIMAL THROUGH THE PERIOD.Read more
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