MD 1668 CONCERNING SEVERE POTENTIAL…WATCH UNLIKELY FOR EASTERN MD…SOUTHERN PA…DE…NJ…SOUTHERN NY..CT…MA…RI
Mesoscale Discussion 1668 NWS Storm Prediction Center Norman OK 1143 AM CDT Tue Aug 09 2022 Areas affected...Eastern MD...Southern PA...DE...NJ...Southern NY..CT...MA...RI Concerning...Severe potential...Watch unlikely Valid 091643Z - 091845Z Probability of Watch Issuance...20 percent SUMMARY...Isolated damaging wind gusts are possible this afternoon from the northern Mid-Atlantic into southern New England. DISCUSSION...Recent surface analysis places a low over southern ME, with a cold front extending southwestward from this low across the central Hudson Valley into central PA. A weak trough also precedes this front. extending southward through central MA and central CT into northern NJ and far eastern PA. Current surface observations also reveal dewpoints in the 70s areawide, with numerous locations reporting dewpoints in mid 70s. Cumulus continues to deepen in the vicinity of the surface trough as the air mass heats and destabilizes. This trend is expected to persist throughout the afternoon, resulting in the development of scattered thunderstorms. The stronger mid-level flow will be over ME, displaced north of the stronger buoyancy, which is expected across the Delmarva, eastern PA, and NJ. Additionally, the overall instability will be limited by weak mid-level lapse rates and warm thermodynamic profiles. Even so, steep low-level lapse rates coupled with a very moist air mass could still support locally damaging wind gusts with any stronger storms. ..Mosier/Hart.. 08/09/2022 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...BOX...OKX...ALY...PHI...BGM...CTP...LWX... LAT...LON 38717592 39607707 40517661 42477238 41977151 40807305 39687417 38757492 38717592