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| Mesoscale Discussion 2127 | |
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Mesoscale Discussion 2127 NWS Storm Prediction Center Norman OK 0459 PM CDT Fri Sep 27 2024 Areas affected...Southern/central VA into extreme northern NC Concerning...Tornado Watch 688... Valid 272159Z - 272330Z The severe weather threat for Tornado Watch 688 continues. SUMMARY...Some tornado threat may persist into the evening. Some parts of Tornado Watch 688 have been extended in time to expire at 8 PM EDT. DISCUSSION...At 2155 UTC, two clusters of relatively low-topped convection with embedded rotating cells are ongoing from extreme northern NC into southern/central VA. One cluster is moving northward to the east of Roanoke, near the leading edge of a pronounced midlevel dry slot. The other cluster is moving across the Tidewater region of Virginia, within a persistent low-level warm-advection regime. Extensive cloudiness and poor lapse rates have limited destabilization, but rich low-level moisture is supporting MLCAPE of around 500 J/kg. Notable weakening of low-level flow has been observed from both the KFCX and KAKQ radars, but 0-1 km SRH remains in the 150 m2/s2 range, sufficient to support some tornado threat with any persistent low-topped supercells. Parts of WW 688 have been extended in time to 8 PM EDT in order to address the remaining threat. ..Dean.. 09/27/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...AKQ...LWX...RNK... LAT...LON 36717991 37047998 37678006 37897946 37777828 37727676 37567606 36827603 36417607 36117640 36087704 36697706 36627868 36527935 36567977 36717991 |
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