|Mesoscale Discussion 477|
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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.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 37409004 37948921 37868889 37638879 37248986 37268999
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