Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
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803 ACUS11 KWNS 292239 SWOMCD SPC MCD 292238 NJZ000-NYZ000-PAZ000-DEZ000-MDZ000-300015- Mesoscale Discussion 1481 NWS Storm Prediction Center Norman OK 0538 PM CDT Sat Jun 29 2024 Areas affected...Southeast PA...NJ...far northern MD/DE Concerning...Severe Thunderstorm Watch 484... Valid 292238Z - 300015Z The severe weather threat for Severe Thunderstorm Watch 484 continues. SUMMARY...Strong to localized severe wind gusts from 50-65 mph will remain possible, mainly focused across southeast Pennsylvania and adjacent states. How far downstream this extends east of the Delaware Valley is uncertain, with forecast expectation of weakening farther east into New Jersey. DISCUSSION...A surging accelerated portion of a short-line segment has bowed across a part of east-central to southeast Pennsylvania. Its current eastward track will result in movement into a more weakly unstable air mass. But given its organization, a damaging wind threat will probably spread east of WW 484 into NJ before diminishing. Meanwhile, supercell structure exists within the tail-end robust updraft in south-central PA. With a plume of low 90s surface temperatures emanating north over central MD, it is plausible the lagging portion of the convective line may undergo a similar acceleration and bowing surge. This could potentially impact parts of far northern MD/DE, adjacent to WWs 482/484. ..Grams.. 06/29/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OKX...PHI...CTP...LWX... LAT...LON 40767627 40817526 40707448 40637413 40057407 39677546 39507641 39647702 40067726 40767627