• MESO: Mesoscale Discussion 2235

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Nov 18 21:30:12 2024
    ACUS11 KWNS 182130
    SWOMCD
    SPC MCD 182129=20
    LAZ000-TXZ000-182300-

    Mesoscale Discussion 2235
    NWS Storm Prediction Center Norman OK
    0329 PM CST Mon Nov 18 2024

    Areas affected...southeast TX and western LA

    Concerning...Tornado Watch 711...

    Valid 182129Z - 182300Z

    The severe weather threat for Tornado Watch 711 continues.

    SUMMARY...A couple tornadoes are possible through early evening with semi-discrete warm-sector storms ahead of an eastward-moving cold
    front.

    DISCUSSION...Deep convection intensified during the past hour with
    multiple supercells ahead of a cold front marching east in Deep East
    to southeast TX. The most favorable thermodynamic/kinematic
    environmental overlap through 01Z appears to be centered on the
    Sabine Valley. Here, surface winds remain southerly amid increasing
    low-level flow from south to north. Surface temperatures within this
    corridor are approaching the low 80s from the west, with dew points
    holding in the low to mid 70s. Ongoing semi-discrete storms across
    southeast TX will have the opportunity to maintain sustained
    supercell structures. Low-topped convection over western LA might
    intensify as well, but seemingly the more probable severe threat
    should emanate from the southeast TX storms before these cells get
    undercut by the impinging cold front.

    ..Grams.. 11/18/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!_n0JxNa_1VhLR7k3UBEiLZ34KApFbMB4e4bAjvs35d_yMBjYaCYgmLhZvTWBrKf9GVU2iJtWt= 7S4F0Ek5xSqqByZB0Y$ for graphic product...

    ATTN...WFO...LCH...SHV...HGX...

    LAT...LON 30319470 30819439 31529379 31989331 32179307 32229279
    32069245 31489274 30979301 30209390 30169449 30319470=20


    =3D =3D =3D
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