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| Mesoscale Discussion 409 | |
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Mesoscale Discussion 0409 NWS Storm Prediction Center Norman OK 0321 AM CDT Wed Apr 10 2024 Areas affected...Upper TX Coast/Southeast Texas...Southwest/South-Central Louisiana Concerning...Severe Thunderstorm Watch 99... Valid 100821Z - 101015Z The severe weather threat for Severe Thunderstorm Watch 99 continues. SUMMARY...Damaging wind gusts, some of which could exceed 75 mph, and line-embedded tornadoes are expected to become more common over the next few hours. A downstream Tornado Watch will likely be needed across far southeast Texas and southwest/south-central Louisiana. DISCUSSION...Convective trends within the ongoing line across southeast TX/Upper TX Coast continue to suggest organization into a more formidable squall line is underway. Current storm motion of this line is eastward at 40 kt, and this storm motion takes it to the edge of Severe Thunderstorm Watch 99 at 10Z. However, some additional acceleration is likely as the line becomes better organized, potentially taking it to the edge of the watch sooner. An outflow boundary remains draped from northern Harris County eastward in Calcasieu Parish. Interaction with this boundary likely contributed to the mesovortex currently ongoing over northern Harris County. This boundary will likely act as the northern extent of the severe risk over the next few hours. Damaging wind gusts, some of which could exceed 75 mph, will remain the primary severe risk. However, line-embedded mesovorticies capable of tornadoes are also expected to become more common as the line moves into far southeast TX and southwest LA. As a result, a Tornado Watch will likely be needed downstream within the next hour. ..Mosier/Smith.. 04/10/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LCH...HGX... LAT...LON 30099569 30949474 31029225 30119185 29699259 29579325 29489395 29099489 28699592 30099569 |
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