• MESO: Mesoscale Discussion 1106

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, June 10, 2022 03:07:22
    ACUS11 KWNS 100307
    SWOMCD
    SPC MCD 100306=20
    NEZ000-KSZ000-100430-

    Mesoscale Discussion 1106
    NWS Storm Prediction Center Norman OK
    1006 PM CDT Thu Jun 09 2022

    Areas affected...Parts of central and south-central Nebraska

    Concerning...Severe Thunderstorm Watch 337...

    Valid 100306Z - 100430Z

    The severe weather threat for Severe Thunderstorm Watch 337
    continues.

    SUMMARY...Isolated large hail remains possible across the southern
    and eastern portion of WW337. Downstream watch issuance is not
    expected.

    DISCUSSION...A few splitting cells continue across parts of central
    and south-central Nebraska this evening, along the eastern periphery
    of a weakly unstable airmass. Despite the elevated nature of this
    activity, strong midlevel flow (40-50 kt in the 3-6-km layer) per
    the UEX VWP should continue to support isolated large hail. Farther
    east over eastern Nebraska, poor midlevel lapse rates atop upper
    50s/lower 60s dewpoints and increasing nocturnal boundary-layer
    stability should generally limit the severe threat. Therefore,
    downstream watch issuance is not expected.

    ..Weinman/Thompson.. 06/10/2022

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4J1UZhOQ34ktAv9JuRK7IfqykdT61qPBvvAOMJchtdaT2gJT1zQ2xdmafWwxs3XHyuz6Y2WpG= sLnvczGzgnCMYzCGcQ$ for graphic product...

    ATTN...WFO...GID...LBF...GLD...

    LAT...LON 40210054 40810045 41119961 41699900 41649859 41029850
    40279880 39889921 39930046 40210054=20


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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, June 16, 2023 19:07:28
    ACUS11 KWNS 161907
    SWOMCD
    SPC MCD 161906=20
    NCZ000-162130-

    Mesoscale Discussion 1106
    NWS Storm Prediction Center Norman OK
    0206 PM CDT Fri Jun 16 2023

    Areas affected...much of central into eastern North Carolina

    Concerning...Severe potential...Watch unlikely=20

    Valid 161906Z - 162130Z

    Probability of Watch Issuance...5 percent

    SUMMARY...A sparse damaging gust or instance of marginally severe
    hail is possible this afternoon with the stronger storms. The severe
    threat will be isolated and a WW issuance is not expected.

    DISCUSSION...Isolated thunderstorms have been maturing along and
    south of the VA/NC border over the past hour or so, with MRMS mosaic
    radar data showing 30 dBZ cores reaching 40 kft, suggesting that a
    few storms are becoming relatively robust. Given the presence of 8-9
    C/km low-level lapse rates (per 18Z mesoanalysis), evaporative
    cooling within the boundary layer may allow for a couple of damaging
    gusts with the heavier storm cores. Modest strengthening winds with
    height are contributing to lengthy hodographs and 35+ kts of
    effective bulk shear, which may support an instance or two of
    marginally severe hail. Nonetheless, since the severe threat is
    expected to remain sparse, a WW issuance is not currently
    anticipated.

    ..Squitieri/Hart.. 06/16/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4gWEvhgtSOIHmXi_rA1KGpcNzYdIwu16B4hVi9PpZo_jbxpDzdeOP0p1mQLYbynNrzAKr-QgL= vm7_ptHvlH-jJ2J7_Y$ for graphic product...

    ATTN...WFO...AKQ...MHX...RAH...ILM...RNK...

    LAT...LON 34827916 35297973 36097981 36517953 36537776 36477653
    36067565 35667558 35187601 34747659 34507758 34557825
    34827916=20


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