MD 0359 CONCERNING TORNADO WATCH 76…78… FOR PARTS OF SOUTHEASTERN LOUISIANA
Mesoscale Discussion 0359 NWS Storm Prediction Center Norman OK 0339 PM CDT Wed Mar 30 2022 Areas affected...Parts of southeastern Louisiana Concerning...Tornado Watch 76...78... Valid 302039Z - 302245Z The severe weather threat for Tornado Watch 76, 78 continues. SUMMARY...Thunderstorm development across the southern Louisiana coastal plain may become more widely scattered to isolated in nature toward 6-7 PM CDT. However, the environment will remain favorable for supercells with the potential to produce tornadoes. DISCUSSION...As the vigorous upstream short wave begins to pivot east-northeast of the southern Great Plains, stronger downstream mid/upper support for convective development may gradually begin to shift northeast of coastal areas toward 23-00Z. As this occurs, there may be some weakening and veering of low-level wind fields with time, but Rapid Refresh forecast soundings indicate that low-level hodographs across much of southeastern Louisiana will remain large and clockwise-curved into early evening, beneath 40-50 kt south to southwesterly flow around the 850 mb layer. It is possible that the southern flank of the more extensive eastward advancing line of storms trailing across the Louisiana coastal plain may transition to more isolate/discrete thunderstorm development. However, with the boundary-layer ahead of it remaining seasonably moist and characterized by moderately large CAPE (up to around 1500 j/kg), the environment will remain conducive to the evolution of supercells capable of producing tornadoes. ..Kerr.. 03/30/2022 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LIX...LCH... LAT...LON 29799216 30919147 30909009 29959015 29189146 29799216
