• MESO: Mesoscale Discussion 1790

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Aug 1 20:16:24 2024
    ACUS11 KWNS 012016
    SWOMCD
    SPC MCD 012015=20
    TXZ000-OKZ000-NMZ000-012245-

    Mesoscale Discussion 1790
    NWS Storm Prediction Center Norman OK
    0315 PM CDT Thu Aug 01 2024

    Areas affected...Northeast New Mexico into the western Oklahoma and
    Texas Panhandles

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

    Valid 012015Z - 012245Z

    Probability of Watch Issuance...5 percent

    SUMMARY...Thunderstorm coverage away from higher terrain is slowly
    increasing across northeastern New Mexico and portions of the
    western OK/TX Panhandles. Thermodynamic conditions are favorable for
    strong to severe outflow winds.

    DISCUSSION...Thunderstorms have been ongoing for much of the
    afternoon within the Sangre de Cristo mountains and Raton Mesa
    within a weak upslope flow regime, but have remained relatively
    benign. However, more recent convective initiation is noted along a
    subtle surface trough/confluence zone draped to the southeast across
    northeast NM into the TX Panhandle. Temperatures climbing into the
    upper 90s and low 100s are eroding any lingering MLCIN, which should
    continue to support isolated to scattered thunderstorm development
    along the surface boundary over the next few hours. These hot
    conditions are driving dewpoint depressions upwards of 30-50 F,
    implying that a deep, well-mixed boundary layer is in place across
    the region - especially along and south of the boundary - that will
    promote strong downdraft accelerations. Weak flow aloft will limit
    storm organization and longevity, but strong to severe outflow winds
    appear possible.=20

    Some recent CAM solutions hint that a cold-pool driven cluster may
    emerge across northeast NM later this afternoon/evening and
    propagate to the southeast. This would pose a somewhat more
    widespread wind threat, but this scenario is conditional on
    achieving sufficient convective coverage and cold pool amalgamation.
    Other solutions suggest that a storm or two may migrate far enough
    east to intensify within a more moist/buoyant air mass. However,
    this potential appears limited given a high likelihood for the
    development of undercutting outflows. Given low confidence in these
    scenarios, watch issuance is not anticipated.

    ..Moore/Bunting.. 08/01/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!5Zaf6CFaeplFErK8bQsrVac_NpDdoZZYTo0j23LrSCD81AjhEghjqrcDzAicn0ENr-oFn9Lj9= ZsSolykn8lqH1uMvFE$ for graphic product...

    ATTN...WFO...LUB...AMA...ABQ...

    LAT...LON 36600508 36660494 36790471 36890427 36930410 36960361
    36940314 36770277 36520237 36230212 35970195 35610184
    35430181 35110186 34980199 34810229 34650268 34560334
    34580378 34690415 34950440 35250467 35630505 36060525
    36300524 36410513 36600508=20


    =3D =3D =3D
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