• MESO: Mesoscale Discussion 0342

    From COD Weather Processor@1:2320/107 to wx-storm@lists.illinois.edu on Fri Apr 3 19:15:59 2026
    ACUS11 KWNS 031915
    SWOMCD
    SPC MCD 031915=20
    OKZ000-KSZ000-TXZ000-032115-

    Mesoscale Discussion 0342
    NWS Storm Prediction Center Norman OK
    0215 PM CDT Fri Apr 03 2026

    Areas affected...Eastern Texas South Plains into central Oklahoma
    and southeast Kansas

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

    Valid 031915Z - 032115Z

    Probability of Watch Issuance...80 percent

    SUMMARY...A watch is likely this afternoon as initial supercells
    develop along the cold front. Large/very-large hail and severe winds
    will be the main hazards. The tornado threat is conditional on
    maintaining a discrete storm mode into early evening.

    DISCUSSION...The observed 18Z LMN sounding showed a firm cap at
    about 800 mb. Modifying this sounding for nearby current surface
    observations would suggest that this cap is eroding, which is
    supported by visible satellite/regional radars showing a few deeper showers/thunderstorms over the last hour. 30-40 kts of effective
    shear will promote initial supercells capable of large/very-large
    hail as well well as severe wind gusts. Given the shear vector
    mostly parallel to the cold front as well as the stronger linear
    forcing, initial activity is expected to congeal somewhat quickly.
    The tornado threat is less clear on account of the initially weak
    low-level shear as well as the transition to a linear mode. However,
    a weak surface low in Northwest Texas into southwest Oklahoma could
    be a zone of greater discrete storm potential. Should those storms
    remain discrete into the evening, there will be an increase in
    low-level shear and, accordingly, a greater tornado risk. This
    scenario is low confidence, though.

    ..Wendt/Hart.. 04/03/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4x1i17dlUkIEho0eJR6JnuPUxxhjIw473plUvb5Ib6q_LvJS6gNWDF50T74rwdkNMQLdJzAmn= Ys28iQWR3XlMF1GKPE$ for graphic product...

    ATTN...WFO...SGF...TSA...ICT...OUN...SJT...LUB...AMA...

    LAT...LON 33290091 34420054 36539837 37919712 38069677 38049623
    37839552 37529501 37139488 35879616 33919847 32999980
    32910044 33290091=20

    MOST PROBABLE PEAK TORNADO INTENSITY...85-115 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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