MD 0477 CONCERNING TORNADO WATCH 121… FOR SOUTHEAST MO…FAR SOUTHERN IL
Mesoscale Discussion 0477
NWS Storm Prediction Center Norman OK
0348 AM CDT Wed Apr 05 2023
Areas affected...southeast MO...far southern IL
Concerning...Tornado Watch 121...
Valid 050848Z - 050915Z
The severe weather threat for Tornado Watch 121 continues.
SUMMARY...Based on recent radar velocity and environmental data, a
strong tornado (EF2-EF3) is likely ongoing. The risk for a longer
track strong tornado will likely persist and spread northeastward
perhaps into southern IL through 430am.
DISCUSSION...An intense supercell is moving northeastward across
southeast MO within a plume of rich low-level moisture immediately
east of the supercell (mid 60s dewpoints). Area 88D VAD show
enlarged low-level hodographs (around 400 0-1km SRH with the
observed storm motion per KPAH). The strong deep-layer shear
coupled with the moderate buoyancy has promoted the development of
long-lived supercells. Expecting a continuation of the
strong-tornado threat to persist downstream into southern IL over
the next hour or so.
..Smith.. 04/05/2023
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...PAH...
LAT...LON 37409004 37948921 37868889 37638879 37248986 37268999
37409004
