• MESO: Mesoscale Discussion 0743

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu May 8 18:37:42 2025
    ACUS11 KWNS 081837
    SWOMCD
    SPC MCD 081837=20
    VAZ000-NCZ000-SCZ000-GAZ000-082000-

    Mesoscale Discussion 0743
    NWS Storm Prediction Center Norman OK
    0137 PM CDT Thu May 08 2025

    Areas affected...The western Carolinas and southern Virginia.

    Concerning...Severe potential...Severe Thunderstorm Watch likely=20

    Valid 081837Z - 082000Z

    Probability of Watch Issuance...80 percent

    SUMMARY...Storms developing over the mountains will eventually
    become severe with a threat for large hail and damaging wind gusts.

    DISCUSSION...Visible satellite shows some deeper convection
    developing along/near the crest of the Appalachians. As low-level
    moisture continues to advect north and the boundary layer heats up,
    instability will increase. This should permit storms to strengthen
    further and move off of the terrain. Effective shear around 40 knots
    (per SPC mesoanalysis) and 1500 J/kg MLCAPE will support the
    potential for organized storms, including supercells. Expect a more
    discrete mode with a hail threat initially before storms likely
    congeal into one or more clusters with an increasing damaging wind
    threat late this afternoon and into the evening.=20

    A severe thunderstorm watch will likely be needed by mid-afternoon
    to address this evolving threat.

    ..Bentley/Gleason.. 05/08/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-XYrv7NdgJdpVi13qM4HXPnx5fnvyj7MZSkVH4l-5J85M9mc9iM2c1thj7KdsRrJMNLlYURci= eVD_Cn3IHtmZCxkHvA$ for graphic product...

    ATTN...WFO...RAH...ILM...RNK...CAE...GSP...

    LAT...LON 34178213 34688330 35308347 35728307 36138197 36298167
    36478155 36998106 37107967 36857882 36007896 34837967
    34268124 34278133 34178213=20

    MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 95 MPH
    MOST PROBABLE PEAK WIND GUST...55-70 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN


    =3D =3D =3D
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