


Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
781 ACUS48 KWNS 060853 SWOD48 SPC AC 060852 Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0352 AM CDT Fri Jun 06 2025 Valid 091200Z - 141200Z ...DISCUSSION... A large MCS may be ongoing across the Ark-La-Tex vicinity on D4/Monday morning. This MCS and attendant flow enhancement with its MCV may support scattered damaging wind potential into the afternoon downstream across the Deep South. How extensive an organized wind threat persists is quite nebulous, given background mid-level westerlies being weaker across the Southeast compared to prior days. Sub-15 percent severe potential remains apparent across the Upper OH Valley to Lower Great Lakes on D4/Monday, shifting east into the Northeast/Mid-Atlantic States on D5/Tuesday. A belt of strong mid-level southwesterlies ahead of broad Great Lakes trough should overlap parts of a weak cold front arcing south from a primary surface cyclone over northeast ON to James Bay. Substantial instability ahead of the front appears uncertain with progged weak mid-level lapse rates and muted boundary-layer heating where the stronger flow resides. During D6-8/Wednesday-Friday, guidance continues to signal a reduction in severe potential, as predominantly weak deep-layer shear overlaps areas of moderate to large buoyancy. ..Grams.. 06/06/2025