
SPC 1200Z Day 1 Outlook

Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1151 PM CST Fri Mar 07 2025 Valid 081200Z - 091200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE SOUTHERN PLAINS...LOWER MISSISSIPPI VALLEY AND CENTRAL TO EASTERN GULF COAST... ...SUMMARY... Isolated severe storms will be possible today and tonight from parts of the southern Plains eastward into the central and eastern Gulf Coast states. ...Southern Plains/Lower Mississippi Valley/Central and Eastern Gulf Coast States... At mid-levels today, a low will move into the southern Plains, as an 80 to 100 knot jet streak translates eastward through the base of the system. A complex of thunderstorms will be ongoing ahead of the jet streak this morning across north-central and northeast Texas. This convection will be mostly to the north of a cold front located from north Texas eastward into the Ark-La-Tex. The primary severe threat this morning will be marginally severe hail due to steep mid-level lapse rates, strong effective shear and sufficient instability. The cluster of storms will move eastward from the vicinity of east Texas this afternoon into the Lower Mississippi Valley this evening. Large-scale ascent ahead of the approaching system, and strong deep-layer shear will continue to support an isolated severe threat. The potential for surface-based thunderstorms is expected to increase as the convection gradually gains access to a moist airmass located across the Gulf Coast region. For this reason, marginally severe wind gusts, and a brief tornado will be possible. The potential for severe gusts will likely be greatest ahead of short multicell line segments. The severe threat is expected to continue after midnight, as new storms develop over the northern Gulf and move northeastward into the central Gulf Coast and Florida Panhandle. ..Broyles/Halbert.. 03/08/2025