• MESO: Mesoscale Discussion 0471

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, May 20, 2018 05:43:16
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    ACUS11 KWNS 200543
    SWOMCD
    SPC MCD 200542
    MOZ000-KSZ000-OKZ000-200815-

    Mesoscale Discussion 0471
    NWS Storm Prediction Center Norman OK
    1242 AM CDT Sun May 20 2018

    Areas affected...eastern Kansas/western and central Missouri

    Concerning...Severe potential...Watch unlikely

    Valid 200542Z - 200815Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Persistent thunderstorms are expected overnight, possible
    in several different episodes. Local/large hail is expected with
    the strongest cells over the next several hours.

    DISCUSSION...Latest radar loop shows a small cluster of convection
    over extreme southeast Kansas -- moving eastward toward central
    Missouri, with more widespread/weaker convection developing across a
    larger portion of eastern Kansas and into western and central
    Missouri. The convection is slightly elevated, likely increasing in
    response to a moderate south-southwesterly low-level jet and
    associated warm advection/isentropic ascent.

    While mid-level westerly flow remains rather modest (around 30 kt),
    very steep lapse rates (as observed by the evening SGF RAOB) are
    contributing to moderate elevated instability (on the order of 2500
    J/kg). Thus, while shear would suggest only weakly rotating storms,
    the amount of available instability suggests continued/persistent
    storms with the strongest cells capable of producing hail generally
    in the 1" to 1.75" range over the next several hours.

    ..Goss/Guyer.. 05/20/2018

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...LSX...SGF...EAX...TSA...TOP...ICT...

    LAT...LON 37019505 37409537 38219517 38829463 39239348 38959215
    38509164 37739181 36969288 36779438 37019505



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, April 29, 2019 01:01:11
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    ACUS11 KWNS 290101
    SWOMCD
    SPC MCD 290100
    KSZ000-290230-

    Mesoscale Discussion 0471
    NWS Storm Prediction Center Norman OK
    0800 PM CDT Sun Apr 28 2019

    Areas affected...western/central ks

    Concerning...Severe Thunderstorm Watch 108...

    Valid 290100Z - 290230Z

    The severe weather threat for Severe Thunderstorm Watch 108
    continues.

    SUMMARY...Severe thunderstorms are expected to spread east of ww108
    over the next few hours. New ww will be issued downstream to reflect
    this threat.

    DISCUSSION...Slow-moving cluster of supercells that evolved near the
    CO/KS border earlier this evening may begin to surge east soon.
    Latest radar data suggests forward propagation may be increasing as
    cluster spreads across Logan/Gove counties. Low-level warm advection
    is expected to aid this eastward movement and continued moistening
    into the I-70 corridor favors increasing severe threat into central
    KS. New ww will likely be issued by 02z.

    ..Darrow.. 04/29/2019

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...TOP...ICT...GID...DDC...GLD...

    LAT...LON 39220080 39359779 38999694 38209710 37999802 38190056
    39220080



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