• MESO: Mesoscale Discussion 1719

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Sep 9 01:25:56 2021
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    ACUS11 KWNS 090125
    SWOMCD
    SPC MCD 090125=20
    MAZ000-CTZ000-NYZ000-NJZ000-PAZ000-090300-

    Mesoscale Discussion 1719
    NWS Storm Prediction Center Norman OK
    0825 PM CDT Wed Sep 08 2021

    Areas affected...Eastern PA...Northern NJ...Southern
    NY...Northwestern CT...Western MA

    Concerning...Severe Thunderstorm Watch 491...

    Valid 090125Z - 090300Z

    The severe weather threat for Severe Thunderstorm Watch 491
    continues.

    SUMMARY...Severe threat continues with storms this evening.

    DISCUSSION...Broken line of strong/severe convection continues to
    advance east at roughly 25kt. This activity is supported aloft by
    strengthening mid-level flow ahead of Great Lakes/OH Valley upper
    trough. Wind profiles continue to favor organized line
    segments/bow-type structures, the primary concern being with line
    segments oriented more north-south/perpendicular to the mean flow.
    One such feature has formed over south-central PA and is tracking east-northeast into western York County. If this storm maintains its
    current track/movement, it will approach southwestern portions of
    ww491 around 0330z.

    ..Darrow.. 09/09/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!uhzg18uBI9Ishp-n5iM5P7wnwBaqNU1JgD9LIGDYbqZzgNZ_HqLotlx_0bDO-C_pp3PgcX1q$=
    for graphic product...

    ATTN...WFO...BOX...OKX...ALY...PHI...BGM...CTP...

    LAT...LON 40187644 42477414 42477258 40187492 40187644=20



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