MD 1595 CONCERNING TORNADO WATCH 474… FOR FAR SOUTHEAST TX…COASTAL LA
Mesoscale Discussion 1595 NWS Storm Prediction Center Norman OK 1132 PM CDT Mon Aug 28 2017 Areas affected...Far Southeast TX...Coastal LA Concerning...Tornado Watch 474... Valid 290432Z - 290630Z The severe weather threat for Tornado Watch 474 continues. SUMMARY...Tornado Watch 474 will be allowed to expire at 05Z and a replacement Watch is not anticipated. DISCUSSION...Banded structure noted over the past several hours has waned with a much more cellular structure to much of the convection associated with Tropical Storm Harvey. The center of Harvey appears to have shifted slightly north-northeastward. Some strengthening may also be occurring. The buoy to the southwest of the center (KBQX) recently reported a gust to 49 kt. This modest increase in winds is likely contributing to increased WAA and the cooling of cloud tops within the deformation band over southeast TX and within the cellular convection off the LA coast. Some small northward movement of the front off the coast has also been noted. However, the front currently remains offshore and consensus amongst the guidance is for the front to remain offshore until the system begins moving northeastward a bit quicker late Tuesday morning. Given these expectations, observational trends over the past hour, and coordination with the WFOs LCH and LIX, Tornado Watch 474 will be allowed to expire at 05Z. A replacement watch is not anticipated at this time. Convective trends will be monitored closely throughout the night for signs of increased tornado potential. ..Mosier.. 08/29/2017 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LIX...LCH... LAT...LON 30329421 30608971 29018969 28749421 30329421
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