Mesoscale Discussion 0363 NWS Storm Prediction Center Norman OK 0514 PM CDT Sun Apr 12 2020 Areas affected...northern Alabama Concerning...Tornado Watch 109... Valid 122214Z - 122345Z The severe weather threat for Tornado Watch 109 continues. SUMMARY...Potential for strong/damaging winds remains evident across northern Alabama, along with risk for tornadoes. Potential will continue as storms shift quickly east-northeastward. DISCUSSION...Latest radar loop shows widespread thunderstorms crossing the northern third of Alabama -- within Tornado Watch 109. The strongest storms are within a bowing cluster exhibiting a persistent mesolow/comma-head circulation, which is now crossing Walker County. Along with risk for damaging winds, tornadoes remain possible with this cluster of fast-moving storms, as several smaller-scale circulations remain evident within the cluster. The strongest of these circulations -- now over southern Walker County -- is currently associated with a TDS/CC min suggestive of a tornado in progress. The severe/tornado potential is being supported by intense/veering flow through the lower and mid troposphere, with this wind field widespread across the Mid South/Tennessee Valley area. However, instability diminishes with northward extent across Tennessee. As such, storms over northern portions of the watch in the vicinity of the Tennessee/Alabama border counties remain weaker at this time. While some risk remains across this part of the area, expect greatest severe/tornado risk to remain over southern portions of the WW over the next hour or so. ..Goss.. 04/12/2020 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...MRX...FFC...OHX...BMX...HUN... LAT...LON 33208797 33798803 35068709 35028565 33688527 33238684 33208797