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Mesoscale Discussion 810 |
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Mesoscale Discussion 0810
NWS Storm Prediction Center Norman OK
0926 AM CDT Fri May 16 2025
Areas affected...the Cumberland Plateau and southern Appalachians
Concerning...Severe potential...Severe Thunderstorm Watch likely
Valid 161426Z - 161630Z
Probability of Watch Issuance...95 percent
SUMMARY...Severe threat, primarily in the form of large hail and
eventually damaging winds, is expected to increase across the
Cumberland Plateau and a part of the southern Appalachians.
DISCUSSION...An arcing band of thunderstorms has developed into
eastern KY, downstream of a broad MCS over central/western KY into
northwest TN. Despite an ample cirrus canopy to the east, moderate
insolation is underway. Coupled with steep mid-level lapse rates, as
sampled in regional 12Z soundings, the plume of large buoyancy over
the TN Valley will extend northeastward towards the southern
Appalachians. Fast, nearly unidirectional westerly deep-layer shear
should favor at least a few supercells ahead of the MCS moving east.
A mix of large hail, which could be significant, along with damaging
winds seems likely.
..Grams/Mosier.. 05/16/2025
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...RNK...RLX...GSP...MRX...JKL...LMK...
LAT...LON 38178385 38138243 37918045 37618009 37297992 36578015
36018077 36268280 36528419 36778477 38178385
MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN
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