• MESO: Mesoscale Discussion 0530

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, May 26, 2018 17:59:47
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    ACUS11 KWNS 261759
    SWOMCD
    SPC MCD 261759
    ILZ000-MOZ000-IAZ000-KSZ000-262030-

    Mesoscale Discussion 0530
    NWS Storm Prediction Center Norman OK
    1259 PM CDT Sat May 26 2018

    Areas affected...Northeast Kansas...northern Missouri...west-central
    Illinois

    Concerning...Severe potential...Watch unlikely

    Valid 261759Z - 262030Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Isolated to scattered storms are expected to form by
    20-21Z from northeast Kansas into west-central Illinois.

    DISCUSSION...Daytime heating combined with the presence of cool
    temperatures aloft is leading to strengthening instability profiles,
    with MUCAPE to around 3000 J/kg from KS across northern MO. A weak
    surface trough should provide sufficient convergence when combined
    with the lack of CIN later this afternoon to produce isolated to
    scattered strong storms. Wind profiles will remain weak, and likely
    favor east-southeastward moving cells capable of hail with eventual
    outflows producing strong wind gusts. CAM solutions indicate
    northeast KS into northwest MO as a favored area, with a secondary
    area of development across west-central IL.

    ..Jewell/Hart.. 05/26/2018

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

    ATTN...WFO...ILX...LSX...DVN...EAX...TOP...

    LAT...LON 39519029 39269106 38949315 38669469 38779560 39619583
    40189353 40579165 40849060 40829010 40468979 40078979
    39519029



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, May 04, 2019 18:06:22
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    ACUS11 KWNS 041806
    SWOMCD
    SPC MCD 041805
    FLZ000-042030-

    Mesoscale Discussion 0530
    NWS Storm Prediction Center Norman OK
    0105 PM CDT Sat May 04 2019

    Areas affected...Central FL Peninsula

    Concerning...Severe potential...Watch unlikely

    Valid 041805Z - 042030Z

    Probability of Watch Issuance...5 percent

    SUMMARY...Thunderstorms capable of isolated damaging wind are
    possible this afternoon. Watch issuance is currently not
    anticipated.

    DISCUSSION...Thunderstorms have recently developed north and east of
    Tampa, with increasing cumulus noted across the central FL Peninsula
    and also along the east coast sea breeze. Additional storm
    development is expected in the next 1-2 hours, as heating continues
    within a moist and increasingly unstable environment.

    While most storms will likely be relatively disorganized, MLCAPE of
    2000-3000 J/kg and relatively cool temperatures aloft will support
    robust updrafts. Modest midlevel southwesterly flow aloft may
    provide sufficient effective shear for weak updraft rotation at
    times, and the strongest cells will be capable of producing isolated
    damaging wind and small hail. Some potential for a brief tornado may materialize near the east coast sea breeze, where backed low-level
    flow and somewhat richer boundary-layer moisture will be in place.

    With the severe threat expected to remain isolated and sporadic in
    nature, watch issuance is currently not anticipated.

    ..Dean/Guyer.. 05/04/2019

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

    ATTN...WFO...MFL...MLB...TBW...

    LAT...LON 28828199 28978095 28288068 26968012 26738017 26478034
    26618117 26738162 27998203 28828199



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