ACUS48 KWNS 160840 SWOD48 SPC AC 160838 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0338 AM CDT Thu Apr 16 2026 Valid 191200Z - 241200Z ...DISCUSSION... Severe thunderstorm potential will be low through at least Day 6/Tuesday. In the wake of a cold front moving offshore the Atlantic coast and into the Gulf, strong surface high pressure will build east of the Rockies and persist across parts of the South and East through Day 6/Tuesday. As a result, a dry and stable boundary layer will preclude severe thunderstorm potential. By the middle of the week, and upper trough is forecast to overspread the western U.S. As this occurs, lee surface troughing will allow for increasing southerly winds over the Plains, and Gulf moisture will begin to return northward Days 7-8/Wed-Thu. It remains uncertain if the upper trough will begin to eject eastward toward the Plains at the end of the period. If this occurs, some severe potential may develop across the Plains, though predictability is low. ..Leitman.. 04/16/2026