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  • MESO: Mesoscale Discussion 1989

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Nov 30 05:34:09 2022
    ACUS11 KWNS 300534
    SWOMCD
    SPC MCD 300533=20
    ALZ000-MSZ000-LAZ000-300700-

    Mesoscale Discussion 1989
    NWS Storm Prediction Center Norman OK
    1133 PM CST Tue Nov 29 2022

    Areas affected...central and southern Mississippi into western and
    central Alabama

    Concerning...Tornado Watch 575...576...

    Valid 300533Z - 300700Z

    The severe weather threat for Tornado Watch 575, 576 continues.

    SUMMARY...Severe/tornado risk will continue across portions of
    Mississippi and Alabama over the next couple of hours.

    DISCUSSION...Latest radar loop shows a consolidating, pre-frontal
    band of strong/locally severe storms extending from northwestern
    Alabama west-southwestward across northern Mississippi to far
    northeastern Louisiana. Damaging wind gusts remain the primary
    severe risk with this band of storms, though a brief tornado is also
    possible.

    Farther to the south/southeast, isolated -- and in some cases,
    rotating -- storms continue, from southern and central Mississippi
    to west-central Alabama. Several of these storms have maintained
    moderate -- but sustained -- rotation as they track
    east-northeastward at around 40 kt. Though rotation has gradually
    weakened with most storms over the past half hour or so, potential
    for tornadic spin-ups will persist across this area over the next
    couple of hours.

    ..Goss.. 11/30/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!9FsQzj0-ae8ViBL9UxHHLmIWM193rJhP92NcjJ_8SvoxT_mKoneO2t_HDF1ebJBMTO9mL8qto= QGxmPj6UsC3xjZkGlw$ for graphic product...

    ATTN...WFO...BMX...HUN...MOB...MEG...JAN...LIX...SHV...

    LAT...LON 31899153 32549194 33159076 33798859 34288793 34278778
    34008668 33228638 31908788 31169020 31099137 31899153=20


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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Aug 14 06:35:43 2023
    ACUS11 KWNS 140635
    SWOMCD
    SPC MCD 140635=20
    MOZ000-ARZ000-OKZ000-140800-

    Mesoscale Discussion 1989
    NWS Storm Prediction Center Norman OK
    0135 AM CDT Mon Aug 14 2023

    Areas affected...Northeast OK into northern AR

    Concerning...Severe Thunderstorm Watch 644...645...

    Valid 140635Z - 140800Z

    The severe weather threat for Severe Thunderstorm Watch 644, 645
    continues.

    SUMMARY...Some threat for severe gusts will spread into northwest AR
    overnight. Uncertainty remains regarding the extent of the threat
    into north-central AR, but downstream watch issuance remains
    possible.

    DISCUSSION...Two bowing storm clusters with a history of producing
    severe gusts are moving across northeast OK at 0630 UTC. These
    clusters will move into northwest AR through the early morning
    hours, with MUCAPE of 1500-2500 J/kg and effective shear 30-40 kt
    remaining generally supportive for organized convection. However, as
    these clusters move eastward and convective outflow sags southward
    immediately downstream, convection may tend to become increasingly
    elevated with time. Despite this, given the current organized state
    of the ongoing convection, some severe-gust potential is expected to
    spread into northwest AR over the next 1-2 hours.

    As outflow continues to move southward in advance of the ongoing
    storm clusters, a gradual weakening trend will be possible with
    time. As a result, severe-wind potential into north-central AR
    remains uncertain, but watch issuance into this region remains
    possible depending on short-term observational trends.

    ..Dean/Edwards.. 08/14/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6HZevSBuFezAeAksmcx6ob7i9tyQo92xdgkquBSwowes-7u1NNWGv7ZwkTyBe0IbQHeyF0i1R= L94Y2-sJCwNsaUTYaE$ for graphic product...

    ATTN...WFO...LZK...SGF...TSA...

    LAT...LON 35679158 35609408 35659491 35879545 36269584 36659575
    36639381 36659201 36639168 36469142 36059146 35809151
    35679158=20


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