• MESO: Mesoscale Discussion 0697

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sat May 22 00:31:41 2021
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    ACUS11 KWNS 220031
    SWOMCD
    SPC MCD 220030=20
    SDZ000-NEZ000-KSZ000-COZ000-220200-

    Mesoscale Discussion 0697
    NWS Storm Prediction Center Norman OK
    0730 PM CDT Fri May 21 2021

    Areas affected...Central High Plains

    Concerning...Severe Thunderstorm Watch 192...

    Valid 220030Z - 220200Z

    The severe weather threat for Severe Thunderstorm Watch 192
    continues.

    SUMMARY...Severe threat continues across the central High Plains,
    especially from eastern Colorado into the Nebraska Panhandle. Hail
    remains the primary threat.

    DISCUSSION...Largely meridional deep-layer flow continues across the
    central High Plains this evening. This flow regime is responsible
    for a steep lapse-rate plume extending across eastern NM/CO into
    western NE. Scattered thunderstorms have formed along the western
    edge of higher PW along a low-level confluence zone as surface
    parcels reached convective temperatures. Much of this activity is
    producing at least marginally severe hail, though severe hail has
    been noted across the NE Panhandle with storms that have now lifted
    north of a well-defined surface front, and are now elevated as they
    skirt southeast of the Black Hills region. Given the deep southerly
    flow, greatest concentration of convection will extend along a
    corridor from eastern CO into the NE Panhandle, then into
    southwestern portions of SD north of a sharp cold front. Hail
    remains the primary risk.

    ..Darrow.. 05/22/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!oRUg5ye1yZN187hcQsVJlLvjTDR034pzlj9rniF4CsdMrUT05yILXZnGP03sMQePYJ7uh280$=
    for graphic product...

    ATTN...WFO...LBF...UNR...GLD...PUB...BOU...CYS...

    LAT...LON 38580459 43490284 43490005 38600200 38580459=20



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