• MESO: Mesoscale Discussion 1196

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, July 29, 2018 20:21:27
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    ACUS11 KWNS 292021
    SWOMCD
    SPC MCD 292020
    NEZ000-COZ000-WYZ000-292115-

    Mesoscale Discussion 1196
    NWS Storm Prediction Center Norman OK
    0320 PM CDT Sun Jul 29 2018

    Areas affected...extreme southeast WY...northeast CO

    Concerning...Tornado Watch 322...

    Valid 292020Z - 292115Z

    The severe weather threat for Tornado Watch 322 continues.

    SUMMARY...Several hail-prolific producing supercells will pose a
    giant hail (potentially 3+ inches in diameter) and tornado risk for
    the next 1-2 hours as the storms move through extreme southeast WY
    into northeast CO.

    DISCUSSION...Radar imagery shows 3 large hail-producing supercells
    over southeast WY to the northeast of CYS. The KCYS VAD shows an
    impressive deep-layer shear profile with southeasterlies veering to
    the west at 1.5 km ARL and strengthening in excess of 75kt at 8km.
    As a result, 75kt 0-6 km shear and moderate buoyancy will favor very
    large to giant hail growth (2-3.5 inches in diameter) during
    intermittent periods of more intense updraft spurts. The risk for a
    supercell tornado will remain with the 2 downstream supercells in
    Laramie County, WY as the storms move into northern Weld County, CO.

    ..Smith.. 07/29/2018

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...BOU...CYS...

    LAT...LON 40700460 41670508 41850482 41570409 40880363 40630381
    40550421 40700460



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