• MESO: Mesoscale Discussion 0750

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed May 26 19:21:40 2021
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    ACUS11 KWNS 261921
    SPC MCD 261921=20

    Mesoscale Discussion 0750
    NWS Storm Prediction Center Norman OK
    0221 PM CDT Wed May 26 2021

    Areas affected...portions of NH...western ME...MA...RI and CT

    Concerning...Severe potential...Watch likely=20

    Valid 261921Z - 262015Z

    Probability of Watch Issuance...80 percent

    SUMMARY...Thunderstorms are expected to increase over the next 1-2
    hours. Sporadic damaging wind gusts will be possible with this
    activity through the evening hours.

    DISCUSSION...Instability has been increasing across the region over
    the past 1-2 hours as temperatures have climbed into the 80s to low
    90s amid upper 50s to low 60s dewpoints. Some higher dewpoints are
    evident across parts of MA/RI/CT as well. Adequate effective shear
    (25-30 kt) will exist amid weak instability, supporting at least
    briefly organized clusters of storms. Furthermore, very steep low
    level lapse rates greater than 8 C/km are evident in 18z
    mesoanalysis data. This will foster the potential for strong
    downdrafts and sporadic damaging wind gusts will be possible as
    storms track quickly eastward across the region through this
    evening. A severe thunderstorm watch will likely be needed within
    the next hour.

    ..Leitman/Hart.. 05/26/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!tUQkQB_5hQ4LZAXrpCSaCYpVYUvZCAL9IeCkI--imgtOUBF8-OXv3leAcdwcn_jOK_lHLT6o$=
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    LAT...LON 43247253 44467185 44807147 44857086 44747053 44487023
    43917020 43647032 43317052 42557098 41897138 41717183
    41647226 41657255 41797287 42297287 43247253=20

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