Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
962 ACUS03 KWNS 190717 SWODY3 SPC AC 190715 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0215 AM CDT Sat Sep 19 2026 Valid 211200Z - 221200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS FOR PORTIONS OF THE TENNESSEE VALLEY INTO THE SOUTHERN AND CENTRAL APPALACHIANS... ...SUMMARY... Isolated severe gusts may accompany the stronger storms over parts of the southern and central Appalachians on Monday. ...Synopsis... Mainly zonal mid-level flow, with embedded impulses, will characterize the upper air pattern east of the Rockies, with a mid-level trough slowly progressing across the Southwest on Monday. Eastern portions of a diffuse cold front will linger over portions of the eastern TN Valley into the central Appalachians Monday afternoon, supporting scattered thunderstorm development. Given upper 60s F dewpoints contributing to 1500+ J/kg of tall and thin MLCAPE, a few wet downbursts capable of producing damaging gusts may occur with the stronger storms. ..Squitieri.. 09/19/2026 $$