SPC 1200Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1151 PM CST Sat Dec 07 2024 Valid 081200Z - 091200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Rain/rain showers, and possibly occasional lightning in some areas, will spread across the Lower Mississippi and Tennessee Valleys today. Severe weather is not expected. ...Discussion... An upper low in the southern branch of a split-flow regime across the U.S. will shift eastward across the southern Plains through the day, before devolving into an open wave and accelerating across the Mid and Lower Mississippi Valley and into the Lower Ohio and Tennessee Valley areas overnight. Ahead of the advancing low/trough, a broad zone of warm advection/quasigeostropic ascent will support widespread precipitation, including elevated convection. Occasional lightning may accompany the convection locally, but due to weak CAPE, and the elevated nature of the convection, severe weather is not expected. ..Goss/Moore.. 12/08/2024