Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
529 ACUS02 KWNS 070647 SWODY2 SPC AC 070645 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1245 AM CST Thu Nov 07 2024 Valid 081200Z - 091200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS IN CENTRAL TO NORTH TX... ...SUMMARY... Isolated severe thunderstorms are possible through early evening Friday across parts of central to north Texas. ...TX... A deep mid/upper-level cyclone will move north-northeastward from NM into the central High Plains. A weak surface low will similarly track northward from northwest TX into western KS before occluding. A trailing outflow-reinforced cold front should push east into central TX by late afternoon Friday. A surface ridge initially across the Mid-South will limit more substantial moisture return north of the Red River. Extensive convection will likely be ongoing at 12Z Friday across parts of west TX/OK. An isolated/marginal severe threat could accompany the storms during the morning across the Edwards Plateau vicinity, where more favorable mid-level instability will be. Surface-based destabilization will struggle across northern parts of TX and this should support increasingly pronounced differential heating from south to north across central TX. Guidance consensus suggests a separate arc of afternoon thunderstorm development should occur within a warm conveyor ahead of the surface front. This could foster a mesoscale uptick in severe potential approaching the I-35 corridor late day. While low-level SRH should be modest where MLCAPE is more than meager, rich western Gulf moisture will support potential for a few supercells. Hail/wind may be the primary threats, but a couple tornadoes are also possible. Guidance does differ with how quickly the outflow-reinforced cold front pushes east during the day, yielding moderate uncertainty of where a greater severe threat may be. Given the north-northeast track of the upper low and associated weak surface cyclone, forcing for ascent should progressively wane during the evening from south to north. This suggests the severe threat will likely diminish after sunset. ..Grams.. 11/07/2024 $$