• MESO: Mesoscale Discussion 0663

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Thursday, May 07, 2026 06:39:10
    ACUS11 KWNS 070639
    SWOMCD
    SPC MCD 070638=20
    GAZ000-FLZ000-ALZ000-MSZ000-070815-

    Mesoscale Discussion 0663
    NWS Storm Prediction Center Norman OK
    0138 AM CDT Thu May 07 2026

    Areas affected...southern MS into south AL...southwest GA...and the
    FL Panhandle

    Concerning...Tornado Watch 189...

    Valid 070638Z - 070815Z

    The severe weather threat for Tornado Watch 189 continues.

    SUMMARY...A tornado and damaging-wind threat will continue
    overnight. Eventual downstream watch issuance is likely.

    DISCUSSION...Despite the presence of very rich low-level moisture,
    moderate buoyancy, and strong deep-layer flow/shear, convection has
    become rather disorganized early this morning across southern MS/AL
    into southwest GA. This is likely due to gradually increasing MLCINH
    and generally poor low-level lapse rates related to the deep, moist
    boundary layer. However, favorable low-level moisture transport and
    upper jet dynamics will continue to sustain convection through the
    overnight, with most guidance depicting renewed strengthening of
    850-700 mb flow.=20

    While a cluster mode may be maintained through the overnight hours,
    strong effective shear (50+ kt) will remain favorable for embedded
    supercells and/or small bowing segments, if there is any uptick in
    storm intensity. 0-1 km SRH will conditionally support tornadoes
    along/ahead of the composite outflow/front that will continue to
    move southeastward with time. Strong low/midlevel flow will also
    support damaging-wind potential, especially if any stronger cold
    pools can become established. Isolated hail also cannot be ruled out
    with the strongest updrafts.=20

    With some preconvective moistening and destabilization expected into
    parts of southeast AL/southwest GA and the FL Panhandle, eventual
    downstream watch issuance is considered likely.

    ..Dean/Mosier.. 05/07/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!76hxfo-p3IMhFKkdNT8IKcw0JTxLdbMl9lZPmSqEAACmXnRZ1J081pdmTvCvDludnxcdQMs69= uWbHXhdSHQtj2uW_9M$ for graphic product...

    ATTN...WFO...FFC...TAE...BMX...MOB...JAN...LIX...

    LAT...LON 31198915 31868672 32358431 32308379 31908354 31288357
    30918442 30558627 30228791 30188891 30428919 30718922
    31198915=20

    MOST PROBABLE PEAK TORNADO INTENSITY...100-125 MPH
    MOST PROBABLE PEAK WIND GUST...55-70 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


    =3D =3D =3D
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