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  • MESO: Mesoscale Discussion 1775

    From COD Weather Processor @1:2320/107 to All on Tue Jul 28 00:10:02 2026
    ACUS11 KWNS 280009
    SWOMCD
    SPC MCD 280009
    INZ000-KYZ000-ILZ000-280145-

    Mesoscale Discussion 1775
    NWS Storm Prediction Center Norman OK
    0709 PM CDT Mon Jul 27 2026

    Areas affected...portions of far eastern Illinois into western
    Indiana and far northwestern Kentucky

    Concerning...Severe Thunderstorm Watch 521...

    Valid 280009Z - 280145Z

    The severe weather threat for Severe Thunderstorm Watch 521
    continues.

    SUMMARY...The severe threat should continue for several more hours,
    with damaging gusts the main threat. Given that Severe Thunderstorm
    Watch 521 is set to expire at 01Z, a WW time extension or a new
    Severe Thunderstorm Watch issuance will be needed to cover the
    longer-term threat.

    DISCUSSION...Supercells continue to track southward along the
    western flank of a broader region of convection. MRMS mosaic MESH
    radar data shows severe hail falling with these storms, several of
    which containing 30 dBZ echo tops exceeding 50 kft. These storms
    continue to track southward amid an airmass characterized by 4000
    J/kg MLCAPE and 50-60 kts of effective bulk shear. Given the highly
    favorable ambient parameter space preceding these storms, severe
    potential should continue for at least a few more hours, which
    exceeds the expiration time of Severe Thunderstorm Watch 521.
    Therefore, either a temporal extension of Severe Thunderstorm Watch
    521 or a new Severe Thunderstorm Watch issuance will likely be
    needed in the next hour or so.

    ..Squitieri/Smith.. 07/28/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fjg!_e8Mx9EkEpYTgocuCLE-2SXIaFIPyIc9cBuH4o2r9Mnzl1kkstr7UJA99GVel0VlnUASb7PkjDdhIMDCsJvWqB8rAvU$ for graphic product...

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

    LAT...LON 37778793 40648786 40668755 40518712 40228676 40018665
    39598665 39038681 38408692 37948693 37638703 37528718
    37528756 37628779 37778793

    MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
    MOST PROBABLE PEAK WIND GUST...55-70 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


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    --- scorpsmtpd
    * Origin: capitolcityonline.net * KY, USA (1:2320/107)