• MESO: Mesoscale Discussion 2450

    From COD Weather Processor @1:2320/107 to All on Wednesday, November 11, 2026 22:53:08
    ACUS11 KWNS 112252
    SWOMCD
    SPC MCD 112252
    INZ000-KYZ000-ILZ000-120015-

    Mesoscale Discussion 2450
    NWS Storm Prediction Center Norman OK
    0452 PM CST Wed Nov 11 2026

    Areas affected...portions of southwestern Indiana into far
    northwestern Kentucky

    Concerning...Severe Thunderstorm Watch 704...

    Valid 112252Z - 120015Z

    The severe weather threat for Severe Thunderstorm Watch 704
    continues.

    SUMMARY...A risk for primarily large hail and damaging wind gusts
    continues across portions of Severe Thunderstorm Watch 704. The best
    chance for a brief tornado may also exist over the next hour or so.

    DISCUSSION...Convective coverage/intensity have gradually increased
    over the past couple of hours as large-scale forcing for ascent has increasingly overlapped modestly better low-level moisture across
    portions of the mid-Ohio River Valley. Thus far, convective mode has
    been a mix of supercells and linear segments, with recent reports of
    1" and 1.75" hail noted in Indiana. Weak instability (500-1000
    J/kg), modest mid-level lapse rates of 6.5-7.0 C/km, and cold
    temperatures aloft (around -18 to -20 C) will continue to favor a
    threat for large hail, especially with any persistent, discrete
    supercells. Damaging wind gusts also remain possible, particularly
    with ongoing/developing linear segments.

    The best chance for a brief tornado may also exist over the next
    hour or so prior to the onset of stronger nocturnal cooling and
    before the surface cold front begins to outrun the narrow, low-level
    moisture plume. The greatest potential is likely to exist with any
    discrete supercell located in close proximity to the surface low
    noted over western Indiana. Marginal low-level moisture (upper 40s
    to mid 50s F surface dewpoints) and generally veered, southwesterly
    surface winds suggest any tornado threat is likely to remain
    brief/localized, however.

    ..Chalmers.. 11/11/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fjg!4bv14Ml9g0L2fu137DwJEaFX2ejUgKQkvvBVI9tG6yvE2xovRBSrgTF8Dfd6jaWuOdH8nyTZAybmXKhvdNIeGeexEZE$ for graphic product...

    ATTN...WFO...LMK...IND...PAH...ILX...

    LAT...LON 38118794 39458742 39848693 39988673 40058629 39998600
    39568585 38898592 38248635 37948664 37818697 37818744
    37938785 38118794

    MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
    MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN
    = = =
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    --- scorpsmtpd
    * Origin: capitolcityonline.net * KY, USA (1:2320/107)