• MESO: Mesoscale Discussion 1543

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat Jul 6 17:02:18 2024
    ACUS11 KWNS 061702
    SWOMCD
    SPC MCD 061701=20
    NEZ000-KSZ000-061900-

    Mesoscale Discussion 1543
    NWS Storm Prediction Center Norman OK
    1201 PM CDT Sat Jul 06 2024

    Areas affected...central Nebraska into much of western Kansas

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

    Valid 061701Z - 061900Z

    Probability of Watch Issuance...80 percent

    SUMMARY...Storms will generally increase in coverage over the next
    several hours from south-central Nebraska into northwest and western
    Kansas. Hail and damaging wind gusts will be possible.

    DISCUSSION...Beneath cool midlevel temperatures and in a zone of
    modest warm advection, isolated cells producing hail have formed
    over central NE. This area is north of the surface warm front, which
    diffusely extends east/west just north of the KS/NE border.

    Low-level moisture is generally modest with upper 50s to lower 60s F
    dewpoints. However, cool temperatures aloft will combine with
    continued heating to produce MLCAPE of 1500-2000 J/kg, and overall
    steepening lapse rates.

    Surface observations already indicate substantial warming and
    boundary-layer mixing ahead of the developing low near the CO/KS/NE
    border, with a tight temperature gradient near the warm front.

    Give the existence of lift near the warm front, and continued
    destabilization, it seems unlikely that the ongoing storms will
    dissipate, and thus a hail threat may persist with these cells.=20

    A rapid ramp-up of storm coverage is then anticipated later this
    afternoon, perhaps by 19Z-20Z along the front. This initial
    convection will likely produce severe hail initially, with
    increasing damaging wind threat as a linear mode takes shape. Shear
    profiles appear to favor rightward-moving storms over western KS
    through the afternoon, while eastward moving storms are most likely
    along the warm front into southern NE.

    ..Jewell/Guyer.. 07/06/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!_CDEAkZEL_nNo2VOJE73B-AGGPcJDLFZe-abk6YXg0AAJei_3eGSvPtYmdjoY8uZ8aKKwrf4c= 4Ll5_fov8aiTDcD_3U$ for graphic product...

    ATTN...WFO...OAX...GID...LBF...DDC...GLD...

    LAT...LON 41659864 41559800 40949752 40389783 39619906 37940035
    37910122 38160171 39370175 40090154 41050042 41439980
    41659864=20


    =3D =3D =3D
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