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  • MESO: Mesoscale Discussion 0386

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, May 11, 2018 09:25:10
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 110925
    SWOMCD
    SPC MCD 110924
    IAZ000-MOZ000-NEZ000-KSZ000-111030-

    Mesoscale Discussion 0386
    NWS Storm Prediction Center Norman OK
    0424 AM CDT Fri May 11 2018

    Areas affected...Central/Southeast NE

    Concerning...Severe Thunderstorm Watch 82...

    Valid 110924Z - 111030Z

    The severe weather threat for Severe Thunderstorm Watch 82
    continues.

    SUMMARY...Severe threat continues to gradually diminish across the
    region.

    DISCUSSION...Initially discrete storms across south-central NE which
    prompted a local extension of Severe Thunderstorm Watch 81 have
    gradually lost intensity as they moved eastward/northeastward into
    the airmass which has been overturned by the earlier MCS. These
    storms are expected to continue this downward trend, although cell
    mergers may briefly result in updraft intensification.

    Farther east (across southeast NE), line of storms that developed
    via warm-air advection over the MCS outflow continue to track
    northeastward at 40-45 kt. Like the storms farther west, echo tops
    with this line of storms have gradually come down as the
    thermodynamic environment becomes less favorable. Additionally,
    despite its fast forward motion and linear structure, the elevated
    nature of the line is likely limiting damaging wind gusts at the
    surface.

    Given these factors, it is unlikely that Severe Thunderstorm Watches
    81 and 82 will need to be extended past their current expiration
    times of 10Z.

    ..Mosier.. 05/11/2018

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

    ATTN...WFO...EAX...OAX...TOP...GID...

    LAT...LON 40979872 41559848 41649682 41349600 40619552 39889583
    39779705 40079804 40499852 40979872



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, April 18, 2019 11:37:12
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 181137
    SWOMCD
    SPC MCD 181136
    LAZ000-TXZ000-181300-

    Mesoscale Discussion 0386
    NWS Storm Prediction Center Norman OK
    0636 AM CDT Thu Apr 18 2019

    Areas affected...portions of western Louisiana and far east Texas

    Concerning...Severe Thunderstorm Watch 81...

    Valid 181136Z - 181300Z

    The severe weather threat for Severe Thunderstorm Watch 81
    continues.

    SUMMARY...Local/limited severe risk will linger this morning.

    DISCUSSION...Latest radar loop shows that the convective band which
    has been moving across eastern Texas has weakened substantially over
    the past hour, as it nears/crosses the Sabine River. With that
    said, a few occasionally stronger updrafts continue to occur within
    the otherwise diminishing line of convection, with the strongest
    storms to affect Jasper and Newton Counties in Texas in the short
    term. With a moist/unstable airmass remaining over southwest
    Louisiana, storms capable of an occasional stronger gust will remain
    possible, as the leading edge of the convection crosses the river.
    However, the limited/isolated nature of the threat anticipated
    precludes any need for new WW issuance in the near term.

    ..Goss.. 04/18/2019

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

    ATTN...WFO...LCH...SHV...

    LAT...LON 30039389 30579436 32549339 32269275 30649208 29679241
    30039389



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