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| Mesoscale Discussion 1670 | |
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Mesoscale Discussion 1670 NWS Storm Prediction Center Norman OK 0250 PM CDT Wed Jul 17 2024 Areas affected...Eastern PA/northern NJ into western New England Concerning...Severe Thunderstorm Watch 552... Valid 171950Z - 172145Z The severe weather threat for Severe Thunderstorm Watch 552 continues. SUMMARY...The threat for primarily damaging straight-line winds continues for WW 552. DISCUSSION...Ongoing thunderstorms across the watch area have begun to loosely cluster into linear segments, and could potentially see further organization given modest buoyancy and deep-layer vertical shear of 40-45 kts. The greatest threat for damaging winds will be with any mature, isolated updrafts that take on supercellular characteristics, as well as any locally enhanced bowing segments from merging/constructively interfering thunderstorm outflows. Steep low-level lapse rates and relatively dry boundary layers/high MLLCL heights will continue to support the downward mixing of thunderstorm outflow winds. The latest short-term guidance indicates that additional convective development in the southwest portion of the watch area, primarily Eastern PA into northern NJ, is likely around 22-02Z. The primary threat with these storms will be damaging thunderstorm wind gusts. ..Halbert/Squitieri.. 07/17/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GYX...BOX...BTV...OKX...ALY...PHI...BGM...CTP... LAT...LON 39737478 39807539 39807621 39787672 39817727 39847747 40347717 40907689 41317654 41707616 41937593 42187547 42397484 42807406 42917377 43007350 43297226 43177171 42747153 42347166 41707230 40917310 40167389 39797423 39737478 |
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