• MESO: Mesoscale Discussion 0396

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, May 12, 2018 23:16:16
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    ACUS11 KWNS 122316
    SWOMCD
    SPC MCD 122316
    NJZ000-PAZ000-DEZ000-MDZ000-130015-

    Mesoscale Discussion 0396
    NWS Storm Prediction Center Norman OK
    0616 PM CDT Sat May 12 2018

    Areas affected...Middle Atlantic

    Concerning...Tornado Watch 85...

    Valid 122316Z - 130015Z

    The severe weather threat for Tornado Watch 85 continues.

    SUMMARY...Severe threat will spread southeast across ww85 over the
    next several hours. Hail/wind are the primary threats.

    DISCUSSION...Remnant MCV from early-morning convection over northern
    IN has moved east-southeast into central PA where it appears to be
    partly responsible for aiding renewed thunderstorm development. Over
    the last 1-2 hours a corridor of upward-evolving convection has
    organized across southern PA and this activity is
    spreading/developing east-southeast across central portions of ww85. Radar/observational data suggests this activity is generating
    outflow that is surging well ahead of the convection but new
    thunderstorms may ultimately develop near the outflow/synoptic front intersection in the vicinity of Baltimore. Primary tornado threat
    will be with any supercells that evolve across eastern MD, utilizing aforementioned boundary where low-level helicity is maximized.
    Otherwise, hail/wind are the primary threats.

    ..Darrow.. 05/12/2018

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

    ATTN...WFO...PHI...CTP...LWX...

    LAT...LON 40857682 40117379 38437431 39147738 40857682



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, April 19, 2019 07:43:53
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    ACUS11 KWNS 190743
    SWOMCD
    SPC MCD 190742
    GAZ000-FLZ000-ALZ000-190945-

    Mesoscale Discussion 0396
    NWS Storm Prediction Center Norman OK
    0242 AM CDT Fri Apr 19 2019

    Areas affected...southeast Alabama...west-central and southwest
    Georgia...and the Florida Panhandle

    Concerning...Tornado Watch 86...

    Valid 190742Z - 190945Z

    The severe weather threat for Tornado Watch 86 continues.

    SUMMARY...Risk for isolated severe storms and a tornado or two
    continues.

    DISCUSSION...Latest radar loop shows a complex/near-continuous band
    of thunderstorms extending from northwest Georgia
    south-southwestward to western portions of the Florida Panhandle.
    Ahead of the convection -- and associated surface front -- resides a
    moist boundary layer, with a narrow axis of ample instability over
    the Florida Panhandle and nosing into western Georgia.

    Area VWPs continue to reveal strong/favorable shear, with flow veering/increasing with height to in excess of 60 kt through the
    lower half of the troposphere. As such, organized convection --
    noted within the line where complex/rotating segments continue to
    evolve -- will likely persist. Along with risk for locally damaging
    gusts, a tornado or two remain possible as well. The greatest
    short-term threat appears to exist in east-central and southeast
    Alabama, in the Lee/Macon/Russell/Bullock county area where areas of
    transient rotation remain evident within the complex line.

    ..Goss.. 04/19/2019

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

    ATTN...WFO...FFC...TAE...BMX...MOB...

    LAT...LON 30008705 31518674 32548593 33418510 33298409 32458392
    30038405 29588501 29978611 30008705



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