Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0303 AM CST Thu Dec 18 2025 Valid 211200Z - 261200Z ...DISCUSSION... An expansive area of high pressure will build across the eastern CONUS on D4/Sunday and push a frontal zone near the Gulf Coast. After this, ridging will build across the central CONUS and allow rich moisture to advance well inland from the southern Plains to the Midwest by D7/Wednesday. However, building heights aloft will result in minimal if any forcing for thunderstorm development during this period. Even beyond day 7, model guidance shows decent agreement in a modest ridge breakdown without much severe weather concern.
