• MESO: Mesoscale Discussion 0323

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thursday, May 03, 2018 00:17:35
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    ACUS11 KWNS 030017
    SWOMCD
    SPC MCD 030017
    TXZ000-030145-

    Mesoscale Discussion 0323
    NWS Storm Prediction Center Norman OK
    0717 PM CDT Wed May 02 2018

    Areas affected...portions of western TX

    Concerning...Severe Thunderstorm Watch 64...

    Valid 030017Z - 030145Z

    The severe weather threat for Severe Thunderstorm Watch 64
    continues.

    SUMMARY...Isolated strong to severe storms will continue across
    portions of western north Texas into the Rio Grande region this
    evening. Uncertainty exists with regards to additional storm
    development and Severe Thunderstorm Watch 64 continues across the
    region.

    DISCUSSION...Some uncertainty continues with regards to additional
    convective development into the nighttime hours across parts of
    western TX. A line of storms that developed early ahead of the
    dryline will continue to lift east/northeast across north TX while
    isolated cells persist further south toward the Big Bend vicinity.
    Hi-res HRRR guidance continues to insist additional development will
    occur along the retreating dryline. Additionally, guidance continues
    to indicate that storms developing across the Rio Grande in Mexico
    will lift northeast overnight into parts of west TX. A lack of more
    robust storm development along the Sierra del Burro and some modest
    growth of cumulus along the dryline call this scenario into
    question. Given uncertainty, and an environment that will continue
    to support severe storms should they develop, Severe Thunderstorm
    Watch 64 continues.

    ..Leitman.. 05/03/2018

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

    ATTN...WFO...FWD...EWX...SJT...LUB...MAF...

    LAT...LON 33309833 29460025 29410079 29460196 29480283 33360105
    33309833



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, April 13, 2019 18:39:23
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    ACUS11 KWNS 131839
    SWOMCD
    SPC MCD 131838
    LAZ000-TXZ000-132015-

    Mesoscale Discussion 0323
    NWS Storm Prediction Center Norman OK
    0138 PM CDT Sat Apr 13 2019

    Areas affected...Parts of eastern Texas into central Louisiana

    Concerning...Tornado Watch 53...

    Valid 131838Z - 132015Z

    The severe weather threat for Tornado Watch 53 continues.

    SUMMARY...Severe weather potential, including the risk for
    tornadoes, is expected to continue to gradually increase through 3-4
    PM CDT. One or two strong tornadoes is possible.

    DISCUSSION...Peak measured (3-second mean wind) winds along the
    eastward advancing gust front have generally been on the order of
    40-45 kts, generally focused along the warm frontal zone. It
    appears that the apex of the bowing reflectivity structure and
    leading edge of outflow will reach the Sabine Valley around 20Z.

    Downstream, discrete supercell development continues immediately
    ahead of the gust front, near/just north of the warm front, with
    additional discrete storms also beginning to initiate in the warm
    sector, inland of the coast, near/north of Houston into southwestern
    Louisiana. 50+ kt south-southwesterly deep layer mean flow will
    support northward motion of developing warm sector cells across a
    rapidly destabilizing boundary layer air mass, roughly along a zone
    Lufkin TX eastward into the Alexandria LA vicinity (near the current
    position of the warm front), during the next few hours. This is
    where near surface hodographs appear largest and the environment
    most supportive of tornadic potential through 20-21Z.

    ..Kerr.. 04/13/2019

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

    ATTN...WFO...JAN...LCH...SHV...HGX...

    LAT...LON 31929478 32059390 32229228 31619172 31149179 30649279
    30619382 31009501 31929478



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