• MESO: Mesoscale Discussion 0242

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, April 13, 2018 22:09:28
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    ACUS11 KWNS 132209
    SWOMCD
    SPC MCD 132208
    MOZ000-ARZ000-140015-

    Mesoscale Discussion 0242
    NWS Storm Prediction Center Norman OK
    0508 PM CDT Fri Apr 13 2018

    Areas affected...central and southern Missouri

    Concerning...Severe potential...Watch possible

    Valid 132208Z - 140015Z

    Probability of Watch Issuance...60 percent

    SUMMARY...Portions of central and southern Missouri are being
    considered for a tornado watch as convection migrates northeastward
    into the region from northern Arkansas.

    DISCUSSION...Scattered convection initially over southwestern
    Missouri has migrated northeastward into the discussion area
    recently, although it has weakened while doing so. More
    robust/mature convection persists upstream across western Arkansas
    and eastern Oklahoma, however, and these storms will probably pose a
    threat for at least isolated hail/wind and a couple of tornadoes
    with time. These storms will be supported by ample low- and deep
    shear for updraft organization/rotation despite relatively weaker
    surface-based buoyancy compared to areas farther south. A low-level
    jet over central/eastern Arkansas is expected to increase with time
    just east of this region, and sustained low-level warm advection
    will result in increasing surface dewpoints with time (perhaps
    reaching the 62-66F range closer to 00Z and beyond), which may also
    support a continued, yet isolated severe threat.

    Trends are being monitored, and storms can maintain their intensity
    while migrating toward the discussion area, a new tornado watch will
    likely be needed.

    ..Cook/Guyer.. 04/13/2018

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

    ATTN...WFO...PAH...MEG...LSX...LZK...SGF...EAX...

    LAT...LON 38529340 38829301 38759246 38359167 37789117 37259070
    36599057 36409161 36569374 37099378 38049353 38529340



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tuesday, March 26, 2019 01:05:30
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 260005
    SWOMCD
    SPC MCD 260004
    GAZ000-ALZ000-MSZ000-260200-

    Mesoscale Discussion 0242
    NWS Storm Prediction Center Norman OK
    0704 PM CDT Mon Mar 25 2019

    Areas affected...Central/southern Alabama

    Concerning...Severe Thunderstorm Watch 34...

    Valid 260004Z - 260200Z

    The severe weather threat for Severe Thunderstorm Watch 34
    continues.

    SUMMARY...The severe risk continues although it will begin to
    diminish after sunset. Large hail remains the primary threat
    although strong wind gusts are possible.

    DISCUSSION...Strong/severe storms continue across portions of
    central/southern Alabama and into portions far west/central Georgia.
    Storms have begun to develop farther southwest along the cold front
    into southeast Mississippi, although updrafts do not appear to be
    very robust and are unlikely to become severe. Large hail is still
    the primary threat with any of the stronger storms and strong winds
    are also possible given the well mixed boundary layer. The severe
    threat will diminish as insolation wanes with instability
    decreasing. A few of the established storms may stay strong/severe
    after sunset including just beyond the watch, but a watch extension
    is unlikely given the likely very isolated severe coverage.

    ..Nauslar/Thompson.. 03/26/2019

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

    ATTN...WFO...FFC...BMX...MOB...JAN...

    LAT...LON 32168844 32628709 32978644 33188575 33248528 33158506
    32758473 32408475 32148499 31898545 31798634 31748736
    31698791 31558844 31748847 31988849 32168844



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