• MESO: Mesoscale Discussion 0319

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Wed Apr 1 20:39:44 2026
    ACUS11 KWNS 012039
    SWOMCD
    SPC MCD 012039=20
    OKZ000-KSZ000-TXZ000-012215-

    Mesoscale Discussion 0319
    NWS Storm Prediction Center Norman OK
    0339 PM CDT Wed Apr 01 2026

    Areas affected...Parts of northwest TX...western/central
    OK...southern KS

    Concerning...Severe potential...Tornado Watch likely=20

    Valid 012039Z - 012215Z

    Probability of Watch Issuance...95 percent

    SUMMARY...Severe storm development is expected from late afternoon
    into the evening. Tornado Watch issuance is likely in the next 1-2
    hours.

    DISCUSSION...Heating/destabilization is underway this afternoon
    across much of TX/OK, along/south of a northward-moving warm front.
    Steep lapse rates were noted within the 800-500 mb layer from the
    18Z LMN sounding, though with weaker lapse rates noted above 500 mb
    within an extensive cirrus plume. Temperatures in the low 80s F and
    dewpoints in the low/mid 60s are supporting MLCAPE generally in the
    1000-2000 J/kg range along/south of the warm front, and along/east
    of a diffuse dryline extending from the southeast TX Panhandle into
    southwest TX.=20

    While deep-layer flow (as depicted by regional VWPs and objective
    mesoanalyses) is currently rather modest, an increase in both
    low-level and deep-layer shear is expected with time into the
    evening, in response to an approaching mid/upper-level shortwave
    trough. Increasing ascent and weakening MLCINH should eventually
    result in storm development near the warm front and southward along
    the dryline by late afternoon into the early evening, with
    additional warm sector development possible as the low-level jet
    continues to intensify.=20

    Initial storm development is expected to evolve into a broken band
    of supercells, with an attendant threat of large to very large hail,
    localized severe gusts, and eventually a tornado threat as low-level
    shear/SRH continues to increase. Guidance varies regarding the
    duration of discrete supercell potential before upscale growth
    occurs, but a conditional strong tornado threat could accompany any
    persistent supercell into the evening. Tornado Watch issuance is
    expected later this afternoon or early evening in response to these
    threats.

    ..Dean/Hart.. 04/01/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6XA2fBrw7BJtCnkCnIhw65rb3jWt72Gzs2OL9DFo9TnOa-03iI8yslxDeHkA9ScwqYzwLhhK3= P4AAjalXM0ojd_ozoI$ for graphic product...

    ATTN...WFO...TSA...ICT...FWD...OUN...DDC...SJT...LUB...AMA...

    LAT...LON 33510056 35969981 37479861 37729760 37289707 36479688
    35209767 34279810 33429860 32739883 32900004 33510056=20

    MOST PROBABLE PEAK TORNADO INTENSITY...100-130 MPH
    MOST PROBABLE PEAK WIND GUST...65-80 MPH
    MOST PROBABLE PEAK HAIL SIZE...2.00-3.50 IN


    =3D =3D =3D
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