• MESO: Mesoscale Discussion 0985

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tuesday, May 31, 2022 01:17:48
    ACUS11 KWNS 310117
    SWOMCD
    SPC MCD 310117=20
    WIZ000-MNZ000-310245-

    Mesoscale Discussion 0985
    NWS Storm Prediction Center Norman OK
    0817 PM CDT Mon May 30 2022

    Areas affected...Western Great Lakes

    Concerning...Severe Thunderstorm Watch 295...

    Valid 310117Z - 310245Z

    The severe weather threat for Severe Thunderstorm Watch 295
    continues.

    SUMMARY...Severe threat will increase across the western portions of
    ww295 over the next hour.

    DISCUSSION...Strong large-scale support is spreading across the
    upper MS Valley ahead of short-wave trough and associated 95kt 500mb
    speed max approaching northwest IA. High-level diffluent flow aloft
    and ample reservoir of buoyancy across WI suggest squall line over
    eastern MN will continue to advance east. Several fast-moving
    bow-type features are noted along this linear MCS and damaging winds
    can be expected with these features. Severe threat will increase
    across western portions of ww295 over the next hour or so.

    ..Darrow.. 05/31/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!_jfMWXDdPIEjL1vonjMfIhbSUi5l9WkM3FJvbf614TMzLEMtjc2-2rK2UTVCySFHSgBnxoXKG= VY9nOqXbjfY2jPDs-o$ for graphic product...

    ATTN...WFO...DLH...MPX...

    LAT...LON 44969279 48349241 47939122 45239172 44969279=20


    =3D =3D =3D
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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, June 12, 2023 00:42:57
    ACUS11 KWNS 120042
    SWOMCD
    SPC MCD 120042=20
    ALZ000-MSZ000-LAZ000-120215-

    Mesoscale Discussion 0985
    NWS Storm Prediction Center Norman OK
    0742 PM CDT Sun Jun 11 2023

    Areas affected...central Mississippi

    Concerning...Severe Thunderstorm Watch 270...

    Valid 120042Z - 120215Z

    The severe weather threat for Severe Thunderstorm Watch 270
    continues.

    SUMMARY...A new severe thunderstorm watch will likely be needed
    across central MS this evening.

    DISCUSSION...Several severe thunderstorms are ongoing across
    northern MS and eastern AR this evening. Large hail to golfball size
    has been the main reported hazard with this activity so far. As
    these storms continue to develop and shift southeast, they will
    encounter strong instability (2500 J/kg MLCAPE) and effective shear
    magnitudes around 35-40 kt. The 00z JAN RAOB showed steep midlevel
    lapse rates greater than 7 C/km and an elongated hodograph,
    indicating potential for severe hail will continue. With time, some
    upscale development into bowing segments is possible. If this
    occurs, damaging wind potential will increase as the band of
    convection shifts south through at least 1 am CDT.=20

    Severe thunderstorm watch 270 expires at 03z, but the threat severe
    threat is expected to extend beyond that time, as well as further
    east and south of the current watch. As a result, a new watch will
    likely be needed in the next 1-2 hours.

    ..Leitman.. 06/12/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4apvFvY6vO5llpT89NGho4_3m76pbBHmjU8ITLiRzPBc8-JykghyUunD7xJOxPFRSbQI6ChSp= GS1yC3SZOHIPqBjAoo$ for graphic product...

    ATTN...WFO...BMX...MEG...JAN...

    LAT...LON 32968830 32268843 32028979 32099066 32409101 32869109
    33309102 33649091 33849041 33718833 32968830=20


    =3D =3D =3D
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