• MESO: Mesoscale Discussion 1183

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, July 28, 2018 19:03:54
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    ACUS11 KWNS 281903
    SWOMCD
    SPC MCD 281903
    MEZ000-NHZ000-MAZ000-VTZ000-CTZ000-NYZ000-282000-

    Mesoscale Discussion 1183
    NWS Storm Prediction Center Norman OK
    0203 PM CDT Sat Jul 28 2018

    Areas affected...eastern NY...western MA...VT and NH

    Concerning...Severe potential...Watch unlikely

    Valid 281903Z - 282000Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Thunderstorms will continue to develop this afternoon. A
    couple of strong gusts (40-55 mph) are possible and may result in
    localized pockets of wind damage. Marginally severe hail may occur
    with the strongest updrafts.

    DISCUSSION...Radar/satellite imagery show thunderstorms developing
    over the Champlain Valley and the Hudson Valley with isolated storms
    over southern VT/NH. Temperatures have warmed into the lower 80s
    degrees F over the lower elevations ahead of a diffuse cold front
    located over eastern NY. A mid-level shortwave trough is rotating
    through the base of a larger-scale trough over Quebec but will
    largely pass to the northwest of the Canadian border and primarily
    influence convective development over the St. Lawrence Valley. Yet,
    strong southwesterly mid- to high-level flow over the region will
    aid in storm organization. The overall intensity for thunderstorms
    will be limited by weak mid-level lapse rates but a couple of
    pockets of wind damage are possible with the stronger downdrafts.
    Hail may also accompany the strongest cores before this activity
    weakens by early evening. The coverage/duration and overall
    magnitude of the severe risk will likely preclude a severe
    thunderstorm watch issuance.

    ..Smith/Grams.. 07/28/2018

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

    ATTN...WFO...GYX...BOX...BTV...ALY...

    LAT...LON 45157381 45057161 44337093 43087095 41617403 42057442
    45157381



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