• MESO: Mesoscale Discussion 0358

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, May 05, 2018 00:23:41
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    ACUS11 KWNS 050023
    SWOMCD
    SPC MCD 050023
    PAZ000-WVZ000-050130-

    Mesoscale Discussion 0358
    NWS Storm Prediction Center Norman OK
    0723 PM CDT Fri May 04 2018

    Areas affected...Southwest to central PA

    Concerning...Severe Thunderstorm Watch 75...

    Valid 050023Z - 050130Z

    The severe weather threat for Severe Thunderstorm Watch 75
    continues.

    SUMMARY...Severe-weather threat will continue to diminish from
    southwest to central Pennsylvania this evening, with
    severe-thunderstorm watch #75 being able to expire at or before 9 PM
    EDT.

    DISCUSSION...At 0010Z, mosaic radar imagery showed a band of
    convection extending from northeast to southwest PA, while VWP data
    in western and central PA indicated strong westerly low-level winds
    (40-50 kt at 1 km above ground level). The likelihood of these
    stronger winds of reaching the surface with any remaining convection
    will continue to wane, given the presence of weak convergence and a
    stable environment across much of PA.

    ..Peters.. 05/05/2018

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

    ATTN...WFO...BGM...CTP...PBZ...

    LAT...LON 39908052 40667848 41557695 41947614 40967619 40647700
    40617750 40407825 39967874 39757885 39748037 39908052



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, April 15, 2019 03:57:34
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    ACUS11 KWNS 150357
    SWOMCD
    SPC MCD 150356
    CTZ000-MAZ000-NYZ000-NJZ000-PAZ000-DEZ000-MDZ000-DCZ000-150600-

    Mesoscale Discussion 0358
    NWS Storm Prediction Center Norman OK
    1056 PM CDT Sun Apr 14 2019

    Areas affected...Southern and Eastern New York...Eastern and Central Pennsylvania...New Jersey...Delaware...New York City

    Concerning...Severe potential...Watch likely

    Valid 150356Z - 150600Z

    Probability of Watch Issuance...80 percent

    SUMMARY...The severe threat is likely to develop eastward into
    southeast New York, eastern Pennsylvania and New Jersey over the
    next few hours. A tornado and wind damage threat will be likely.
    Weather watch issuance will be needed to the east of the current
    watches over the next hour or so.

    DISCUSSION...The latest surface analysis shows a cold front moving
    quickly eastward across the central Appalachians. A well-developed
    squall line is located just ahead of the front from western New York
    southward into western Pennsylvania. This squall line is moving
    eastward at 35 to 40 kt and will move through the remaining part of
    WW 69 and 71 over the next few of hours. The line will affect areas
    to the east of the watches during the early overnight period.
    Further to the east, cells that develop ahead of the line will also
    impact areas to the east of the watch. The strong shear environment
    evident on regional WSR-88D VWPs will continue a wind damage and
    isolated tornado threat along the more intense portions of the line.

    ..Broyles/Guyer.. 04/15/2019

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

    ATTN...WFO...OKX...ALY...PHI...BGM...AKQ...BUF...CTP...LWX...

    LAT...LON 43117642 42477703 41447774 40337801 39007719 38617630
    38527569 38557534 38817490 39457438 40187392 40837365
    41757331 42597326 43267408 43397568 43117642



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