|Mesoscale Discussion 160|
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Mesoscale Discussion 0160
NWS Storm Prediction Center Norman OK
1200 PM CDT Tue Mar 20 2018
Areas affected...Northern/Central FL...Southeast GA
Concerning...Tornado Watch 17...
Valid 201700Z - 201800Z
The severe weather threat for Tornado Watch 17 continues.
SUMMARY...Tornado threat continues across the entire region.
DISCUSSION...Large-scale forcing ahead of progressive short-wave
trough appears to be aiding recent upscale growth in convection
across the northeast Gulf. Radar data suggests several longer-lived
supercells are offshore with the back edge roughly 100mi southwest
of CTY extending to roughly 150mi west of TPA. While earlier
supercell activity over land has since diminished/moved offshore, it
appears an upward trend in convection will be noted across ww17 over
the next few hours as influence of the short wave begins to
overspread the northern Peninsula. 15z XMR sounding exhibited
substantial SBCAPE with fairly steep mid-level lapse rates (7.8 C/km
between 3-6km), supportive of robust updrafts given the approaching
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 27188305 30588383 31068138 27708065 27188305
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