Mesoscale Discussion 0025
   NWS Storm Prediction Center Norman OK
   0119 AM CST Sat Jan 11 2020

   Areas affected...Northern LA

   Concerning...Tornado Watch 5...8...

   Valid 110719Z - 110845Z

   The severe weather threat for Tornado Watch 5, 8 continues.

   SUMMARY...A corridor of increased risk for strong wind gusts and
   embedded QLCS tornadoes will exist across northern LA for the next
   hour or two.

   DISCUSSION...Recent regional radar imagery depicts increased
   east-southeastward motion of the convective line moving into
   northern LA. This forward surge is occurring amidst interaction
   between the convective line along the front and pre-frontal storms,
   suggesting these storm interactions are leading to updraft/downdraft
   augmentation. Surface observations across the region also suggest a
   meso-low may be developing within this portion of the convective
   line. The overall environment remains very supportive of organized
   storms with 0-1 km SRH over 400 m2/s2, MLCAPE over 1500 J/kg, and
   effective bulk shear around 60-65 kt.

   The increased forward speed, stronger updrafts, and meso-low
   development within this favorable environment all suggest a higher
   probability for strong wind gusts and embedded QLCS tornadoes exists
   downstream across northern LA for the next hour or two.

   ..Mosier.. 01/11/2020

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

   ATTN...WFO...JAN...LCH...SHV...

   LAT...LON   32999317 32969229 32629198 32119201 31529265 31189401
               32129401 32999317