• MESO: Mesoscale Discussion 1116

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Sat Jun 13 04:43:17 2026
    ACUS11 KWNS 130443
    SWOMCD
    SPC MCD 130442=20
    MOZ000-KSZ000-130645-

    Mesoscale Discussion 1116
    NWS Storm Prediction Center Norman OK
    1142 PM CDT Fri Jun 12 2026

    Areas affected...Southeast Kansas into southwest Missouri

    Concerning...Severe potential...Watch unlikely=20

    Valid 130442Z - 130645Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Thunderstorm development appears likely in the coming
    hours across east/southeast Kansas, eventually spreading into
    southwest Missouri through the early morning. Large hail will be the
    primary hazard, but this threat should remain sufficiently isolated
    and transient to preclude watch issuance.

    DISCUSSION...Over the past 20-40 minutes, a pair of incipient
    thunderstorms have emerged within a deepening cumulus field from
    near Emporia, KS southward to the OK/KS border. This is likely due
    to the recent uptick in the nocturnal jet and isentropic ascent
    evident in the KVNX and KICT VWPs, which both show a gradual uptick
    in low-level winds and ground-relative SRH over the past couple of
    hours. This shallow convection may also be influenced by a subtle,
    but discernible, mid-level wave migrating southeast out of eastern
    NE/IA towards KS/MO.=20

    Recent RAP analyses and forecast soundings depict nearly uncapped
    most-unstable parcels between 850-800 mb, which aligns with the
    layer of increasing isentropic ascent noted in VWP observations.
    Consequently, it appears that additional thunderstorm development is
    likely over the next 1-3 hours across eastern KS. Modest mid-level
    lapse rates and somewhat weak forcing for ascent will likely yield
    gradually intensifying storms, but effective shear on the order of
    30-40 knots should promote a few stronger, more organized cells
    capable of producing large hail (possibly as high as 1.25 to 1.75
    inches in diameter).=20

    This activity is forecast to spread east into southwest MO with
    time, though continued storm development and eventual clustering may
    further modulate the coverage and intensity of the severe threat.
    Given these limitations, watch issuance is unlikely at this time.

    ..Moore/Gleason.. 06/13/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-c_ZgpF6-gnTxRdjm9f_ZEnXawMHz-d53g9uNzXNt4xtzdf6aiNnJjMAkkNcTtLb5e6JSnuka= aZ0EIT16_WZHAFddOY$ for graphic product...

    ATTN...WFO...SGF...EAX...TOP...ICT...

    LAT...LON 37009460 37069585 37109644 37249673 37589691 38069693
    38509668 38849632 39029560 38949472 38719418 38509372
    38079339 37769330 37299337 37069355 36989370 37009460=20

    MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.00-1.75 IN


    =3D =3D =3D
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