• MESO: Mesoscale Discussion 1581

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, July 25, 2022 00:28:05
    ACUS11 KWNS 250028
    SWOMCD
    SPC MCD 250027=20
    KYZ000-INZ000-ILZ000-MOZ000-250230-

    Mesoscale Discussion 1581
    NWS Storm Prediction Center Norman OK
    0727 PM CDT Sun Jul 24 2022

    Areas affected...southeast Missouri into southern Indiana

    Concerning...Severe Thunderstorm Watch 499...

    Valid 250027Z - 250230Z

    The severe weather threat for Severe Thunderstorm Watch 499
    continues.

    SUMMARY...A threat of isolated damaging wind and marginal hail
    continues across the watch area.

    DISCUSSION...Strong to severe cells currently exist over southern
    IN, with smaller cells currently over IL and MO. A wind gust of 52
    kt was recently measured along the IL/IN border, with 60 kt just to
    the east. This primary mass of storms will continue to propagate
    southeast toward the OH River, and may bring strong gusts to parts
    of KY. Although heating has been lost, the very moist air mass along
    with convergence along the front should allow for a continued storm
    threat this evening. Convective trends, including storm coverage,
    will be monitored for the possibility of further watches across the
    OH River.

    ..Jewell.. 07/25/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6zAJ22c1o9VckEOD1aCC1-rSBO2XCtPtOPvBkbgylg6LDY5exQBGdr4_dtkg-A5tDU8-13SNd= xJU2Dv9kXxAfFp_aNI$ for graphic product...

    ATTN...WFO...ILN...LMK...IND...PAH...ILX...

    LAT...LON 37788962 37998921 38328833 38778729 39158585 38898527
    38378508 37848578 37508663 37418752 37248879 37248935
    37508954 37788962=20


    =3D =3D =3D
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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, July 16, 2023 20:34:04
    ACUS11 KWNS 162033
    SWOMCD
    SPC MCD 162033=20
    MSZ000-LAZ000-ARZ000-TXZ000-162200-

    Mesoscale Discussion 1581
    NWS Storm Prediction Center Norman OK
    0333 PM CDT Sun Jul 16 2023

    Areas affected...Portions of northern/eastern LA...far southern
    AR...and southwestern MS

    Concerning...Severe Thunderstorm Watch 498...

    Valid 162033Z - 162200Z

    The severe weather threat for Severe Thunderstorm Watch 498
    continues.

    SUMMARY...The severe/damaging wind threat continues with
    thunderstorms moving east-southeastward. Downstream watch issuance
    is possible.

    DISCUSSION...Multiple measured severe wind gusts and associated
    damage have been noted with a cluster of thunderstorms as they
    advanced eastward across northwestern into north-central LA and far
    southern AR. Very strong instability is present downstream of this
    activity across eastern LA into parts of southern MS, with MLCAPE
    generally ranging from 3000-4000 J/kg. Even though deep-layer shear
    remains weak, the rather favorable thermodynamic environment will
    likely support a continued threat for scattered severe/damaging
    winds as the cluster moves east-southeastward along/south of an
    instability gradient. Given this expectation and ongoing
    organization of the cluster, with additional updrafts forming on its southwestern flank/outflow, downstream watch issuance into more of
    eastern LA and southwestern MS is being considered.

    ..Gleason.. 07/16/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6xW-Ca42XZT6bXoEhVlHd26ZCG0x9sppicVe0VAJPJxQaxg7AhZQ1RqfHO_UkDKj7o3VAWFnV= l9IhmUEqkAkme2sbsg$ for graphic product...

    ATTN...WFO...JAN...LIX...LZK...LCH...SHV...

    LAT...LON 33449317 33249196 32829097 32199048 31529016 31079061
    31079168 31449306 31929401 32349335 32719324 33209345
    33449317=20


    =3D =3D =3D
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