• MESO: Mesoscale Discussion 1620

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jul 18 21:30:03 2023
    ACUS11 KWNS 182129
    SWOMCD
    SPC MCD 182129=20
    TNZ000-MSZ000-ARZ000-190000-

    Mesoscale Discussion 1620
    NWS Storm Prediction Center Norman OK
    0429 PM CDT Tue Jul 18 2023

    Areas affected...far western Tennessee...northeast Arkanas...and
    northern Mississippi

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

    Valid 182129Z - 190000Z

    Probability of Watch Issuance...80 percent

    SUMMARY...At least isolated damaging gusts or marginal hail will
    remain possible for a few more hours, and a new watch is likely.

    DISCUSSION...Radar shows a decelerating outflow boundary extending
    from extreme northeast AR to just northeast of the Memphis TN area.
    Recent trends indicate strengthening storms on the southern
    fringe/outflow of the southeast MO MCS, with impressive echo IR
    presentation. Surface analysis confirms a very moist and unstable
    air mass remains in place south of the AR activity and west of the
    TN outflow, with dewpoints approaching 80 F in spots. Given the
    uncapped air mass and robust convection now ongoing over northeast
    AR, a new watch will likely be issued downstream extending into
    parts of western TN and northern MS.

    ..Jewell/Edwards.. 07/18/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!_jCE2sszLp85C1Pus03FJsPERVu5L-xFekacICaKjG4mHupq-OWXCXlYJzQAL94VvgJ9CpilO= ZwpZcnDJU1_25afBPA$ for graphic product...

    ATTN...WFO...MEG...LZK...

    LAT...LON 35999133 35959060 35938999 35878980 35768951 35438910
    35178843 34798820 34428837 34228879 34328973 34579039
    35029085 35589130 35999133=20


    =3D =3D =3D
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