Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0306 AM CDT Thu Apr 18 2024 Valid 211200Z - 261200Z ...DISCUSSION... For much of the extended period, a deep upper low and expansive trough will exist over eastern Canada, with moderate northwest flow across the central and eastern CONUS with various embedded waves. A cold front will be located roughly along the Gulf Coast on Sunday/D4, with areas of rain and thunderstorms from eastern TX toward the northern Gulf Coast and across northern FL. High pressure will keep the quality low-level moisture primarily offshore, but return flow into the southern Plains is forecast from around Wednesday/D7 and beyond as a potential upper trough develops over the western CONUS. As such, low severe potential is forecast for most of the D4-8 period, with perhaps increasing potential by D8 or beyond as the large northeastern trough dwindles.
