• MESO: Mesoscale Discussion 0343

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, March 30, 2022 00:10:40
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    ACUS11 KWNS 300010
    SWOMCD
    SPC MCD 300009=20
    IAZ000-NEZ000-300145-

    Mesoscale Discussion 0343
    NWS Storm Prediction Center Norman OK
    0709 PM CDT Tue Mar 29 2022

    Areas affected...Eastern Nebraska and far western Iowa

    Concerning...Severe Thunderstorm Watch 71...

    Valid 300009Z - 300145Z

    The severe weather threat for Severe Thunderstorm Watch 71
    continues.

    SUMMARY...A large hail and damaging wind threat will persist into
    the late evening.

    DISCUSSION...Several thunderstorms have developed along and north of
    a warm front across eastern Nebraska. Colder air aloft has advected
    over the region with MUCAPE now around 1000 J/kg. This greater
    instability, combined with a strengthening low-level jet (as
    observed at the KOAX VWP) should permit continued thunderstorm
    activity into the overnight hours. Most hail reports have been less
    than 1 inch, but one report of 1 inch hail was received earlier from
    southwest Valley county. A few additional large hail reports are
    possible through the evening, with the greatest threat from the
    activity northwest of Omaha.

    ..Bentley.. 03/30/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!tJTeYr_q2KVYwUdq1mJeuRKzrobkUxqKetEpe5qahuMejaw0v6N4oEUYdZ3c3YwSXpIyObrP$=
    for graphic product...

    ATTN...WFO...FSD...OAX...GID...LBF...

    LAT...LON 41159656 41149710 41549856 41679878 42119863 42619785
    42479681 42459648 42149608 41749592 41339608 41169646
    41159656=20



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, March 25, 2023 20:36:43
    ACUS11 KWNS 252036
    SWOMCD
    SPC MCD 252035=20
    GAZ000-FLZ000-ALZ000-252200-

    Mesoscale Discussion 0343
    NWS Storm Prediction Center Norman OK
    0335 PM CDT Sat Mar 25 2023

    Areas affected...portions of central and southern Georgia

    Concerning...Severe Thunderstorm Watch 79...

    Valid 252035Z - 252200Z

    The severe weather threat for Severe Thunderstorm Watch 79
    continues.

    SUMMARY...The severe threat continues across Severe Thunderstorm
    Watch 079. Damaging gusts and large hail are the main threats. A
    local WW extension in time is planned.

    DISCUSSION...Multiple strong to potentially severe supercell
    thunderstorms continue to progress across Severe Thunderstorm Watch
    079. MRMS mosaic radar imagery - 7 km CAPPI depicts an overall
    increase in storm intensity across the watch, with an increase in
    the number of storms with 30 dBZ exceeding 40 kft also noted. These
    storms are benefiting from a boundary layer experiencing maximum
    diurnal heating, overspread by a plume of 7 C/km mid-level lapse
    rates, contributing to widespread 2000+ J/kg MLCAPE. Despite
    departing deep-layer ascent, 40-50 kts of effective bulk shear
    remains across the warm sector as 80+ kts of 500 mb flow from an
    associated jet streak glances the region from the north. As such,
    supercell structures may persist and continue supporting mainly a
    damaging gust/large hail threat through the remainder of the diurnal
    heating cycle. Since Severe Thunderstorm Watch 079 expires at the
    top of the hour, a local extension in time is planned to address the
    persisting severe threat.

    ..Squitieri.. 03/25/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!5LzkR1WZH41U2iJuTFmgP4xr6lqzcrBKKd87NPlTWblv1eOc5cuWMwZf6MdZDaoBokVfMBzFJ= -PtNVFg--ntVJmnkmk$ for graphic product...

    ATTN...WFO...JAX...FFC...TAE...

    LAT...LON 31388508 32178379 32588267 32608239 32228224 31568235
    31048259 30758310 30648374 30678417 30858479 31388508=20


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