• MESO: Mesoscale Discussion 0504

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, May 23, 2018 23:07:33
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    ACUS11 KWNS 232307
    SWOMCD
    SPC MCD 232307
    NEZ000-SDZ000-NDZ000-COZ000-MTZ000-WYZ000-240030-

    Mesoscale Discussion 0504
    NWS Storm Prediction Center Norman OK
    0607 PM CDT Wed May 23 2018

    Areas affected...Eastern WY...Western SD...NE Panhandle...Far
    Northeast CO

    Concerning...Severe Thunderstorm Watch 117...

    Valid 232307Z - 240030Z

    The severe weather threat for Severe Thunderstorm Watch 117
    continues.

    SUMMARY...Damaging wind gusts and isolated severe hail remain
    possible across Severe Thunderstorm Watch 117. A downstream watch is
    not anticipated.

    DISCUSSION...Lift provided by the approaching shortwave trough and
    augmented by surface convergence has resulted in scattered
    thunderstorms across WW 117. Thus far, cells throughout eastern
    portions of the watch have developed strong updrafts rapidly but
    then quickly transitioned to a more linear structure and weakening.
    A few strong wind gusts have been measured over the past hour and
    the expectation is for damaging wind gusts to remain the predominant
    severe threat. Severe hail is also possible, particularly within the
    first half hour or so of storm initiation.

    ..Mosier.. 05/23/2018

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

    ATTN...WFO...ABR...BIS...LBF...UNR...GLD...BOU...CYS...BYZ...
    RIW...

    LAT...LON 40560547 41320585 42770608 43460608 43480608 44900606
    45610509 46110340 45800182 42910174 40840202 40140270
    40000356 39990392 40000441 40000479 40000491 40560547



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, May 02, 2019 21:36:38
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    ACUS11 KWNS 022136
    SWOMCD
    SPC MCD 022136
    TNZ000-KYZ000-ILZ000-MOZ000-ARZ000-022230-

    Mesoscale Discussion 0504
    NWS Storm Prediction Center Norman OK
    0436 PM CDT Thu May 02 2019

    Areas affected...Northeast Arkansas...the Missouri Bootheel. Far
    southwest Kentucky...and far northwest Tennessee

    Concerning...Tornado Watch 121...

    Valid 022136Z - 022230Z

    The severe weather threat for Tornado Watch 121 continues.

    SUMMARY...A tornado watch will likely be issued soon downstream of
    tornado watch 121.

    DISCUSSION...Deeper updrafts ahead of an MCV currently in northeast
    Arkansas continue to rotate and have a history of producing
    tornadoes. The downstream airmass remains unstable enough to support
    a continued threat for at least a few more hours. The greatest
    tornado threat will be along the frontal boundary where low-level
    vorticity is maximized. Therefore, a tornado watch will likely be
    issued soon for areas downstream of tornado watch 121.

    ..Bentley/Grams.. 05/02/2019

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

    ATTN...WFO...PAH...MEG...

    LAT...LON 36869028 37078934 37148867 36078858 35598947 35548972
    35329043 35519045 36169052 36869028



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