• MESO: Mesoscale Discussion 1013

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jun 13 16:02:10 2023
    ACUS11 KWNS 131601
    SWOMCD
    SPC MCD 131601=20
    GAZ000-FLZ000-ALZ000-MSZ000-131830-

    Mesoscale Discussion 1013
    NWS Storm Prediction Center Norman OK
    1101 AM CDT Tue Jun 13 2023

    Areas affected...Portions of central/southern MS/AL...southwestern
    GA...and the FL Panhandle

    Concerning...Severe potential...Watch possible=20

    Valid 131601Z - 131830Z

    Probability of Watch Issuance...40 percent

    SUMMARY...Thunderstorms should gradually intensify through the early
    afternoon, while posing some threat for large hail and damaging
    winds. Watch issuance is possible.

    DISCUSSION...Convection has slowly increased in coverage across
    central MS into central/southern AL over the past hour or so. This
    activity is developing along/near the stalled synoptic front, but
    still north of a remnant outflow boundary that is evident in visible
    satellite imagery across southern MS/AL. As robust daytime heating
    occurs, temperatures should increase into at least the mid to upper
    80s, and perhaps lower 90s. A rather moist airmass is also present
    along/south of the front, with surface dewpoints generally in the
    mid 60s to mid 70s. Moderate to locally strong instability is
    forecast to develop by this afternoon across parts of
    central/southern MS/AL into southern GA and the FL Panhandle.

    Area VWPs indicate weak low-level winds gradually strengthen with
    height to around 40-50+ kt at mid/upper levels. This should support
    some threat for supercells, although there may also be a tendency
    for convection to form into small bowing clusters. As low-level
    lapse rates steepen with diurnal heating over the next few hours,
    the threat for damaging winds should likewise slowly increase. Large
    hail will also be a threat with any supercells that can be
    sustained. Current expectations are for the ongoing activity to
    gradually strengthen as it spreads east-southeastward through the
    early afternoon. Depending on convective trends, one or more Severe Thunderstorm Watches may eventually be needed.

    ..Gleason/Thompson.. 06/13/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8CoZIEK1Tqc0NFLR9A7z3t0h69sxAYKqGK3JjfOF_nO_J7u9ixVDB5TItFa6Dc3k6oACNb1V0= HZF4wTt-jq1PQu7X9k$ for graphic product...

    ATTN...WFO...FFC...TAE...BMX...MOB...JAN...

    LAT...LON 31819047 32329042 32408949 32528765 32828681 32738533
    32438356 31548316 30928321 30508353 30408428 30668697
    31278956 31819047=20


    =3D =3D =3D
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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tue Jun 13 16:16:14 2023
    ACUS11 KWNS 131601
    SWOMCD
    SPC MCD 131601=20
    GAZ000-FLZ000-ALZ000-MSZ000-131830-

    Mesoscale Discussion 1013
    NWS Storm Prediction Center Norman OK
    1101 AM CDT Tue Jun 13 2023

    Areas affected...Portions of central/southern MS/AL...southwestern
    GA...and the FL Panhandle

    Concerning...Severe potential...Watch possible=20

    Valid 131601Z - 131830Z

    Probability of Watch Issuance...40 percent

    SUMMARY...Thunderstorms should gradually intensify through the early
    afternoon, while posing some threat for large hail and damaging
    winds. Watch issuance is possible.

    DISCUSSION...Convection has slowly increased in coverage across
    central MS into central/southern AL over the past hour or so. This
    activity is developing along/near the stalled synoptic front, but
    still north of a remnant outflow boundary that is evident in visible
    satellite imagery across southern MS/AL. As robust daytime heating
    occurs, temperatures should increase into at least the mid to upper
    80s, and perhaps lower 90s. A rather moist airmass is also present
    along/south of the front, with surface dewpoints generally in the
    mid 60s to mid 70s. Moderate to locally strong instability is
    forecast to develop by this afternoon across parts of
    central/southern MS/AL into southern GA and the FL Panhandle.

    Area VWPs indicate weak low-level winds gradually strengthen with
    height to around 40-50+ kt at mid/upper levels. This should support
    some threat for supercells, although there may also be a tendency
    for convection to form into small bowing clusters. As low-level
    lapse rates steepen with diurnal heating over the next few hours,
    the threat for damaging winds should likewise slowly increase. Large
    hail will also be a threat with any supercells that can be
    sustained. Current expectations are for the ongoing activity to
    gradually strengthen as it spreads east-southeastward through the
    early afternoon. Depending on convective trends, one or more Severe Thunderstorm Watches may eventually be needed.

    ..Gleason/Thompson.. 06/13/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7--p04iKlqYgIOjWJpswLa_9eEGktH1NFeR-44Rh8is9uiBm8fE3pyUGgChgd9E9ynxRcKrRb= C3WfOn3cbeXOmSllI4$ for graphic product...

    ATTN...WFO...FFC...TAE...BMX...MOB...JAN...

    LAT...LON 31819047 32329042 32408949 32528765 32828681 32738533
    32438356 31548316 30928321 30508353 30408428 30668697
    31278956 31819047=20


    =3D =3D =3D
    To unsubscribe from WX-STORM and you already have a login, go to https://lists.illinois.edu and use the "Unsubscribe" link. Otherwise email Chris Novy at cnovy@cox.net and ask to be removed from WX-STORM.

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