Mesoscale Discussion 1791
Issued: · Valid: –
Summary
A tornado watch is in effect for portions of eastern Pennsylvania and central and southern New Jersey through 7:45 PM CDT, with a heightened risk of brief tornadoes and severe wind gusts over the next two hours.
Product Text
000 ACUS11 KWNS 282251 SWOMCD SPC MCD 282251 NJZ000-NYZ000-PAZ000-DEZ000-282345- Mesoscale Discussion 1791 NWS Storm Prediction Center Norman OK 0551 PM CDT Tue Jul 28 2026 Areas affected...portions of far eastern Pennsylvania into central and southern New Jersey Concerning...Tornado Watch 529... Valid 282251Z - 282345Z The severe weather threat for Tornado Watch 529 continues. SUMMARY...A locally higher threat for a QLCS tornado or severe gusts exists over the next couple of hours. DISCUSSION...The northern end of a cold-pool-driven MCS/QLCS is beginning to traverse a stationary baroclinic boundary, where leading-line intensification has been noted. Despite overall modest vertical wind shear, enhanced streamwise vorticity along this boundary may promote a locally heightened risk of leading-line mesovortex development over the next 1-2 hours. Should such development occur, a focused threat for a severe gust or brief QLCS tornado will exist given ample low-level moisture and 1500+ J/kg MLCAPE. ..Squitieri.. 07/28/2026 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...OKX...PHI... LAT...LON 39507474 39817547 39997567 40207568 40437546 40497478 40547425 40407396 40247391 39977401 39847408 39647429 39507474 MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN