• MESO: Mesoscale Discussion 1000

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Sat Jun 6 17:28:58 2026
    ACUS11 KWNS 061728
    SWOMCD
    SPC MCD 061728=20
    OKZ000-TXZ000-061900-

    Mesoscale Discussion 1000
    NWS Storm Prediction Center Norman OK
    1228 PM CDT Sat Jun 06 2026

    Areas affected...portions of central and northwest Texas into
    south-central Oklahoma

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

    Valid 061728Z - 061900Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Scattered thunderstorms will pose a risk for isolated
    damaging downburst winds and large hail through this evening. A
    brief landspout may also be possible.

    DISCUSSION...A cluster of ongoing thunderstorms west/northwest of
    Abilene has recently exhibited an uptick in lightning activity, with
    MRMS and other MESH estimates ranging from 0.5-1" with a marginal
    supercell located along the leading edge of this cluster as of 1700
    UTC. Additional thunderstorm development is expected through the
    afternoon across portions of central/northwest Texas into southern
    Oklahoma. Continued diurnal heating of this moist low-level air mass
    (as sampled by the 12z FWD/OUN observed soundings) is expected to
    support continued destabilization throughout the afternoon, with
    1500-2000 J/kg MLCAPE expected by peak heating. While deep-layer
    flow remains modest at best, marginally stronger
    southerly/southwesterly flow downstream of a mid-level closed
    low/MCV located over the Texas Panhandle is contributing to around
    25-30 (locally up to 35) kts of effective bulk shear, sufficient for
    marginal updraft organization.=20

    PWAT values in excess of 1.5-1.6" (up to 1.9" sampled by the 12 FWD
    sounding) and a modest steepening of low-level lapse rates (owing to
    diurnal heating) will promote the potential for water loaded
    downbursts, especially with any more organized clusters that can
    develop. Marginal supercells will also be possible. While generally
    weak mid-level lapse rates should largely temper the overall hail
    threat, isolated large hail may accompany the most robust updrafts.
    Finally, a brief landspout cannot be ruled out should a stronger
    low-level updraft interact with enhanced surface vertical vorticity
    along a surface/outflow boundary. Given the expectation for storm
    organization and severe risk to remain limited in magnitude, watch
    issuance is unlikely.

    ..Chalmers/Thompson.. 06/06/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-PbFBiClCYQKQexU83XZCjqQhM-U0nbRLxeVNw_zMv5C8JaVXVsu8ntctVJlCtBiPTxk0sReL= IC0OIepPQZq37j8vMc$ for graphic product...

    ATTN...WFO...FWD...OUN...SJT...LUB...MAF...

    LAT...LON 31890113 32570108 33160086 33730052 34140007 34369957
    34579890 34709786 34559724 34279684 33889660 33469649
    33079651 32419689 31979749 30969895 30659929 30559962
    30579997 30760042 31130087 31890113=20

    MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 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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