• MESO: Mesoscale Discussion 0402

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, May 13, 2018 23:00:49
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    ACUS11 KWNS 132300
    SWOMCD
    SPC MCD 132300
    VAZ000-MDZ000-DCZ000-WVZ000-PAZ000-OHZ000-140000-

    Mesoscale Discussion 0402
    NWS Storm Prediction Center Norman OK
    0600 PM CDT Sun May 13 2018

    Areas affected...Southeast OH to Northern VA

    Concerning...Severe Thunderstorm Watch 86...

    Valid 132300Z - 140000Z

    The severe weather threat for Severe Thunderstorm Watch 86
    continues.

    SUMMARY...Isolated severe threat continues across ww86. Primary
    threats remain hail and damaging winds.

    DISCUSSION...Scattered convection has developed along
    northern-eastern periphery of stronger boundary-layer heating from
    southern OH into northern VA. This activity might be aided in part
    by a remnant disturbance from overnight convection that has since
    migrated into central PA. Deep westerly flow should encourage these
    storms to sag southeast this evening with an attendant threat for
    hail/wind. Coverage may be somewhat less than Saturday evening but
    otherwise similar in storm mode/severe potential, but displaced a
    bit west.

    ..Darrow.. 05/13/2018

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

    ATTN...WFO...AKQ...CTP...LWX...PBZ...RLX...CLE...

    LAT...LON 40748145 38717669 37527733 39548214 40748145



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, April 19, 2019 16:30:25
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    ACUS11 KWNS 191630
    SWOMCD
    SPC MCD 191629
    NCZ000-VAZ000-SCZ000-191830-

    Mesoscale Discussion 0402
    NWS Storm Prediction Center Norman OK
    1129 AM CDT Fri Apr 19 2019

    Areas affected...Coastal Carolinas to southeast VA

    Concerning...Severe potential...Tornado Watch likely

    Valid 191629Z - 191830Z

    Probability of Watch Issuance...80 percent

    SUMMARY...Severe threat will gradually increase through the
    afternoon hours. Some tornado potential exists with damaging winds
    becoming more likely later with a squall line.

    DISCUSSION...Pre-frontal low-level warm advection has been primarily responsible for ongoing band of convection across the eastern
    Carolinas into southeast VA. Within this band, several long-lived
    updrafts have exhibited rotation which is to be expected given the
    observed environmental shear. There is some concern for isolated
    supercells and tornadoes within this regime. However, a more
    concentrated squall line should surge into this region ahead of the
    short wave later this afternoon. Damaging winds are expected with
    this convection.

    ..Darrow/Thompson.. 04/19/2019

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

    ATTN...WFO...AKQ...MHX...RAH...ILM...CAE...

    LAT...LON 33987997 38097732 36627620 33247811 33987997



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