• MESO: Mesoscale Discussion 0696

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon May 5 18:58:34 2025
    ACUS11 KWNS 051858
    SWOMCD
    SPC MCD 051858=20
    TXZ000-NMZ000-052030-

    Mesoscale Discussion 0696
    NWS Storm Prediction Center Norman OK
    0158 PM CDT Mon May 05 2025

    Areas affected...portions of far southeast New Mexico into far
    western Texas

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

    Valid 051858Z - 052030Z

    Probability of Watch Issuance...80 percent

    SUMMARY...The severe threat is gradually increasing across southeast
    NM into far western TX. Supercells should organize over the next few
    hours, accompanied by a severe hail/wind risk. The tornado risk will
    initially be low, but should increase by evening. A Tornado Watch
    may be needed in the next few hours to address the impending severe
    threat.

    DISCUSSION...Convective initiation has recently occurred over far
    southeastern NM along a confluence band ahead of a surface trough,
    with CU gradually becoming more agitated farther south into the
    Trans-Pecos region of southwestern TX. Ahead of the
    developing/intensifying storms, continued diurnal heating beneath
    steepening mid-level lapse rates is supporting 500-1500 J/kg MLCAPE.
    With stronger 500 mb flow rotating around a parent upper low and
    overspreading the southern High Plains, effective bulk shear
    continues to increase (currently over 45 kts per 18Z mesoanalysis).
    As such, storms that mature and become sustained should become
    supercellular, with an initial severe hail/wind risk.=20

    The regional VADs and 18Z mesoanalysis currently depict weak to
    modest low-level shear, which should temper the tornado threat to a
    degree. However, a quasi-stationary baroclinic boundary, identified
    via visible satellite, resides from Chaves County, NM to Howard
    County, TX. While the tornado threat will increase later this
    evening with the intensification of the low-level jet, localized
    earlier tornado potential may exist with a supercell that can anchor
    to this boundary. Given the increasing severe threat, a Tornado
    Watch may be needed in the next few hours.

    ..Squitieri/Gleason.. 05/05/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8RXpd_ec-8pbPwjhOuQTc11qL-W9UmoUGHyFaGhLp3zRnGebiEgBqaQievOCqeLrqJnb8WyIi= p2fbQJPeqlX5n8vw-I$ for graphic product...

    ATTN...WFO...SJT...LUB...MAF...ABQ...EPZ...

    LAT...LON 31120309 31830426 32290470 32980517 33680518 33950510
    34200489 34280438 33920344 33090228 32400183 31730162
    31050197 31120309=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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