• MESO: Mesoscale Discussion 1080

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Thu Jun 11 02:22:32 2026
    ACUS11 KWNS 110222
    SWOMCD
    SPC MCD 110222=20
    ILZ000-IAZ000-MOZ000-110345-

    Mesoscale Discussion 1080
    NWS Storm Prediction Center Norman OK
    0922 PM CDT Wed Jun 10 2026

    Areas affected...portions of northern Missouri and western Illinois

    Concerning...Tornado Watch 303...305...308...

    Valid 110222Z - 110345Z

    The severe weather threat for Tornado Watch 303, 305, 308 continues.

    SUMMARY...Damaging gusts and a brief tornado remain possible with
    strong to severe storms this evening. Storms are mostly behind the
    outflow, but the environment near the boundary still supports some
    risk.

    DISCUSSION...Across parts of northern MO and western IL, initial
    supercells have coalesced into several clusters along and north of
    an east-west oriented outflow boundary across northern MO and
    northwest IL. The environment south of the boundary remains
    moderately unstable with MLCAPE of 2000-2500 J/kg. This is
    supporting a risk for stronger thunderstorms within the ongoing
    clusters. Deep-layer shear, aided by an observed 50 kt low-level
    jet, is also supportive of bowing or occasional embedded supercell
    features. Given the strong buoyancy and shear, some potential for
    primarily damaging gusts and perhaps a brief tornado remains this
    evening. With time, the increase in nocturnal inhibition and the
    tendency for outflow to undercut these storms should end the severe
    threat.

    ..Lyons.. 06/11/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4h2SALhG5NdPYf4JYNa_xZ3x1jSsCytTW6BxnxJ29Jqqqx4nkOC5kzenV0lrUHkiuSUjfPnDk= YeLJfFjB33vcfikY2s$ for graphic product...

    ATTN...WFO...ILX...LSX...DVN...EAX...

    LAT...LON 39829329 39899349 40099352 40289337 40349268 40649096
    40489004 40148998 39749130 39729192 39769297 39829329=20

    MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH
    MOST PROBABLE PEAK WIND GUST...55-70 MPH
    MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN


    =3D =3D =3D
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