Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
171 ACUS48 KWNS 200733 SWOD48 SPC AC 200731 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0231 AM CDT Fri Sep 20 2024 Valid 231200Z - 281200Z ...DISCUSSION... Th latest suite of forecast guidance continues to show large spread during the Day 4-8/Mon-Fri period. While the evolution of a central U.S. upper trough is uncertain, it seems likely general troughing across the eastern half of the U.S. will develop. Some severe potential could develop around Days 4-5/Mon-Tue from the Midwest to the Mid-Atlantic as a surface cold front advances east into a seasonally moist airmass amid moderately enhanced mid/upper flow. Severe potential should decrease late in the forecast period as the surface trough moves offshore the Atlantic and Gulf coasts and surface high pressure builds across the Midwest. ..Leitman.. 09/20/2024