• MESO: Mesoscale Discussion 0426

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, April 06, 2022 19:58:22
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    ACUS11 KWNS 061958
    SWOMCD
    SPC MCD 061958=20
    ALZ000-062200-

    Mesoscale Discussion 0426
    NWS Storm Prediction Center Norman OK
    0258 PM CDT Wed Apr 06 2022

    Areas affected...portions of central Alabama

    Concerning...Severe Thunderstorm Watch 101...

    Valid 061958Z - 062200Z

    The severe weather threat for Severe Thunderstorm Watch 101
    continues.

    SUMMARY...The severe threat continues across Severe Thunderstorm
    Watch 101. Large hail and damaging gusts remain the primary concern.

    DISCUSSION...Multicellular/brief, transient supercellular storms
    continue to progress across Severe Thunderstorm Watch 101 amid an
    unstable, but modestly sheared warm sector. Sub-severe hail has been
    reported with a few of the storms. However, the 18Z BMX observed
    sounding depicted 8.5 C/km mid-level lapse rates atop 70F surface
    dewpoints, suggesting that ample cooling aloft and associated
    buoyancy is sufficient for severe hail production for any storm that
    can mature. In addition to the severe threat associated with the
    ongoing warm-sector cells, additional storm development is possible
    immediately along the cold front. A slight increase in deep-layer
    shear may occur in tandem with the cold front approaching and this
    may sustain the severe threat into the late afternoon to early
    evening hours.

    ..Squitieri.. 04/06/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!qb1R-0m8_FcLs5lfUkF8NV8dL319o5GaJXRJsk7Hn8_h5siwTsbUcB-WZZOPmuDHu13xBZqg$=
    for graphic product...

    ATTN...WFO...BMX...HUN...MOB...

    LAT...LON 32338840 33288818 33898783 33988723 33708594 33328546
    32728522 32168531 31808543 31708573 31918712 32338840=20



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, April 01, 2023 08:47:11
    ACUS11 KWNS 010846
    SWOMCD
    SPC MCD 010846=20
    TNZ000-GAZ000-ALZ000-011015-

    Mesoscale Discussion 0426
    NWS Storm Prediction Center Norman OK
    0346 AM CDT Sat Apr 01 2023

    Areas affected...parts of eastern Tennessee into northern Alabama
    and northwestern Georgia

    Concerning...Tornado Watch 101...102...104...

    Valid 010846Z - 011015Z

    The severe weather threat for Tornado Watch 101, 102, 104 continues.

    SUMMARY...Severe risk continues across portions of eastern
    Tennessee, and into adjacent northern Alabama and northwestern
    Georgia. Along with risk for locally damaging winds, tornado risk
    persists locally as well.

    DISCUSSION...Latest radar loop shows a complex band of storms
    shifting eastward across eastern Tennessee and northern Alabama.=20
    Within this band, several more intense/occasionally rotating
    updrafts continue to occur. A couple of these circulations have
    tightened into low-level mesocyclones sporadically over the past
    hour, indicative of continued/local tornado potential.

    Overall, aside from the southern part of this band across northern
    Alabama, the convection is beginning to encounter the more stable
    airmass that exists with eastern extent into the southern
    Appalachians. As such, the overall risk is expected to decrease as
    storms reach/cross the Tennessee mountains. Farther south however,
    risk is expected to continue across northern Alabama and into
    northern Georgia over the next couple of hours.

    ..Goss.. 04/01/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7hV9ZsPg806o-_g7yLY-cApigI_KhIXJGrlGvEesZrWP9uWFsxQ9kwrxkeNb3TndbwACjf0CZ= R7xDHsKN4JdrK0PBs4$ for graphic product...

    ATTN...WFO...MRX...FFC...OHX...BMX...HUN...

    LAT...LON 36388380 36178356 34828465 33738584 33618820 33838814
    34328750 35568582 35968489 36408430 36388380=20


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