Mesoscale Discussion 0038
   NWS Storm Prediction Center Norman OK
   1150 AM CST Sat Jan 11 2020

   Areas affected...Portions of AL

   Concerning...Tornado Watch 12...13...

   Valid 111750Z - 111915Z

   The severe weather threat for Tornado Watch 12, 13 continues.

   SUMMARY...Greatest potential for tornadoes and damaging
   straight-line winds will shift from western into parts of northern
   and central AL over the next couple of hours. Some of the tornadoes
   could be strong.

   DISCUSSION...A squall line has recently consolidated and
   strengthened over western AL as large-scale ascent associated with a
   northeastward-ejecting upper trough overspreads the central Gulf
   Coast states. A couple of embedded low-level circulations have also
   recently occurred within the line. One such rotational velocity
   signature earlier produced a TDS over Pickens County AL. Very strong
   low-level shear exists downstream of the convective line across
   northern/central AL, with the VWP from KBMX showing southerly
   low-level winds quickly strengthening to over 60 kt in the 0-1 km
   layer. Some curvature of the low-level hodograph is supporting
   effective SRH around 450-650+ m2/s2 given the northeastward motion
   of individual elements embedded within the line. Coupled with a
   gradually destabilizing airmass downstream into northern/central AL,
   this very favorable kinematic environment will be conducive to
   continued damaging straight-line winds and tornadic circulations
   embedded within the line. Even with a mainly linear mode, there
   remains some potential for a strong tornado or two in the short term
   mainly across parts of west-central AL given the exceptionally
   strong low-level shear.

   ..Gleason.. 01/11/2020

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...BMX...HUN...MOB...

   LAT...LON   32108825 33058801 33748796 34388755 34718706 34688669
               34168647 32968663 32258684 31678708 31328746 31358804
               31718827 32108825