Severe Storm Outlook Narrative (AC)
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Issued by NWS
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433 ACUS11 KWNS 302141 SWOMCD SPC MCD 302141 NYZ000-NJZ000-PAZ000-DEZ000-302315- Mesoscale Discussion 1496 NWS Storm Prediction Center Norman OK 0441 PM CDT Sun Jun 30 2024 Areas affected...portions of southeast Pennsylvania and New Jersey Concerning...Severe Thunderstorm Watch 489... Valid 302141Z - 302315Z The severe weather threat for Severe Thunderstorm Watch 489 continues. SUMMARY...The severe threat continues across Severe Thunderstorm Watch 489. Strong to locally severe wind gusts (50-65 mph) remain the primary threat, though a couple instances of hail also cannot be ruled out. The severe threat should gradually diminish as storms move offshore. DISCUSSION...Multiple organized thunderstorm clusters and short line segments continue eastward across portions of the Mid Atlantic. Some of the storms have a history of strong to severe wind gusts, and a 61 mph wind gust was recently measured in Camden County, NJ. These storms are benefiting from an adequately unstable and sheared airmass (i.e. 2000-3000 J/kg MLCAPE with 40-50 kts of effective bulk shear). Regional VADs show that mainly speed shear is present via elongated but nearly straight hodographs. As such, strong to severe multicells and short line segments should continue eastward with a strong gust/hail threat for at least a few more hours. Later this evening, the severe threat should wane when storms move offshore into the Atlantic. ..Squitieri.. 06/30/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OKX...PHI...CTP... LAT...LON 39927667 40737523 40787423 40687356 40447336 40087339 39787437 39727547 39927667