Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0316 AM CDT Sun Oct 05 2025 Valid 081200Z - 131200Z ...DISCUSSION... Surface high pressure is forecast to build across portions of the Midwest and Eastern U.S. behind a cold frontal passage on Day 4-5/Wed-Thu. This high pressure will remain in place for much of the period, and with the cold front developing south toward the Gulf coast states, continental low-level trajectories east of the MS will result in a mostly stable airmass. Some southerly return flow is possible across the southern/central Plains late in the period beneath an upper ridge as surface lee troughing develops ahead of an upper trough developing southeast across parts of the Plains into the eastern half of the CONUS. However, severe potential appears low as any strong large-scale ascent and increasing deep layer shear will remain displaced from better boundary layer moisture.
