Administrators NorthGeorgiaWX Posted November 20, 2023 Administrators Share Posted November 20, 2023 MD 2274 CONCERNING TORNADO WATCH 711... FOR SOUTHEAST TX...MUCH OF LA Mesoscale Discussion 2274 NWS Storm Prediction Center Norman OK 0235 PM CST Mon Nov 20 2023 Areas affected...Southeast TX...Much of LA Concerning...Tornado Watch 711... Valid 202035Z - 202200Z The severe weather threat for Tornado Watch 711 continues. SUMMARY...Threat for supercells capable of all severe hazards, including strong tornadoes, continues. Greatest near-term tornado threat exists from far southeast Texas through west-central and central Louisiana. DISCUSSION...Recent surface analysis reveals a complex pattern with several different boundaries in place across far southeast TX and LA this afternoon. Thunderstorms have been increasing along an axis of pre-frontal convergence that exists just of ahead of the eastward-progressing cold front. This pre-frontal trough exists roughly from the central LA/TX border (about 40 miles southwest of SHV) south-southwestward through Liberty County TX. Environment ahead of this trough continues to destabilize amid low-level moisture advection, with 70 deg F dewpoints in place ahead of this axis across southeast TX and southwest LA. This area of greater low-level moisture is advecting northward, coincident with strengthening low-level flow. This strengthening low-level flow is contributing to longer low-level hodographs and greater storm-relative helicity. As such, an increase in tornadic supercells appears possible over the next hour or two, particularly from Jasper County TX northeastward into west-central/central LA. ..Mosier.. 11/20/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LCH...SHV...HGX... LAT...LON 30059255 29829313 29789387 30049456 30529464 31499420 32119397 32519324 32469247 32279218 31889206 31399201 30509230 30059255 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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