• MESO: Mesoscale Discussion 0331

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, May 03, 2018 07:33:09
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    ACUS11 KWNS 030733
    SWOMCD
    SPC MCD 030732
    ILZ000-MOZ000-ARZ000-030900-

    Mesoscale Discussion 0331
    NWS Storm Prediction Center Norman OK
    0232 AM CDT Thu May 03 2018

    Areas affected...Northwest Arkansas...much of Missouri...western
    Illinois

    Concerning...Severe Thunderstorm Watch 68...

    Valid 030732Z - 030900Z

    The severe weather threat for Severe Thunderstorm Watch 68
    continues.

    SUMMARY...A line of storms will continue east across northern
    Arkansas, southern and eastern Missouri, and western Illinois with
    mainly a threat of locally damaging wind gusts.

    DISCUSSION...A somewhat disjointed line of storms currently extends
    from western IL into central MO, and approaching north central AR. A
    relatively warm and moist air mass exists ahead of the line, with
    dewpoints mainly in the mid 60s F. Surface temperatures remain in
    the mid 70s F, but forecast soundings indicate this is a bit cool
    relative to 700 mb temperatures resulting in a poor lapse rate.
    Still, objective analysis indicates up to 400 m2/s2 effective SRH,
    suggesting brief areas of rotation are possible along the line due
    to sufficient instability.

    ..Jewell.. 05/03/2018

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

    ATTN...WFO...PAH...ILX...MEG...LSX...LZK...SGF...TSA...

    LAT...LON 35399429 36059364 37289325 37879295 38409254 39319109
    39659047 39688991 39218951 38208957 37069017 35919176
    35639250 35399328 35399429



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, April 14, 2019 02:13:54
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 140213
    SWOMCD
    SPC MCD 140213
    ALZ000-MSZ000-140345-

    Mesoscale Discussion 0331
    NWS Storm Prediction Center Norman OK
    0913 PM CDT Sat Apr 13 2019

    Areas affected...Eastern Mississippi and northwest Alabama

    Concerning...Tornado Watch 55...

    Valid 140213Z - 140345Z

    The severe weather threat for Tornado Watch 55 continues.

    SUMMARY...The severe weather threat continues across tornado watch
    55. The primary threat will likely be damaging winds into the
    overnight hours.

    DISCUSSION...The cold front is currently surging across Mississippi
    and has started to catch the pre frontal convection in north central Mississippi. As this front continues to move eastward, bowing line
    segments may become increasingly likely with the threat for damaging
    winds. Given the strong low-level helicity across the area (greater
    than 500 m2/s2 per HTX VWP), embedded QLCS tornadoes are possible.
    The warm front may lift a few counties north in the next few hours
    to the northern most row of counties in Alabama. The greatest
    damaging wind threat will be anywhere south of this warm front with
    the tornado threat maximized in close proximity to this warm front
    where low-level flow will be more backed.

    ..Bentley.. 04/14/2019

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

    ATTN...WFO...BMX...HUN...MOB...MEG...JAN...

    LAT...LON 34058980 34498873 34718793 34848735 34778679 34678626
    34028622 33188629 32428703 31738888 31778940 31959044
    32749033 34058980



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