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| Mesoscale Discussion 2118 | |
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Mesoscale Discussion 2118 NWS Storm Prediction Center Norman OK 0240 PM CDT Thu Sep 26 2024 Areas affected...portions of the Florida Panhandle and southwest Georgia Concerning...Tornado Watch 685... Valid 261940Z - 262145Z The severe weather threat for Tornado Watch 685 continues. SUMMARY...The tornado risk continues across WW 684. The focus should remain close to a weak front/baroclinic zone across the FL Panhandle and Southwest GA. DISCUSSION...Ahead of Hurricane Helene located near 26.4N 85.0W or 195 MI...315 km SW of Tampa, the environment remains favorable for a few tornadoes. Inland advection of a very moist tropical air mass continues along and east of a weak stalled frontal boundary, with weak buoyancy (~1000 J/kg MUCAPE) supporting numerous low-topped convective elements in the outer bands. Low-level hodographs have also continued to expand with the TLH VAD showing strong low-level turning and 250-350 m2/s2 o-1km SRH. As low-topped offshore cells with low-level rotation move northwestward near Apalachicola, a few tornadoes are possible. The greatest focus for tornadoes appears to be along and east of the boundary, where low-level shear should be somewhat enhanced. However, as Helene approaches later this afternoon, low-level shear will continue to increase, supporting a risk for tornadoes across much of the watch area. ..Lyons.. 09/26/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...CHS...JAX...FFC...TAE...BMX... LAT...LON 30698593 31928509 32148310 32108218 31738158 31178135 30728161 30378228 29378338 29008432 28838509 28888546 29358589 30698593 |
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