• MESO: Mesoscale Discussion 1504

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Thu Aug 12 22:45:10 2021
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    ACUS11 KWNS 122245
    SWOMCD
    SPC MCD 122244=20
    MAZ000-NHZ000-RIZ000-CTZ000-VTZ000-122345-

    Mesoscale Discussion 1504
    NWS Storm Prediction Center Norman OK
    0544 PM CDT Thu Aug 12 2021

    Areas affected...Southern New England

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

    Valid 122244Z - 122345Z

    Probability of Watch Issuance...20 percent

    SUMMARY...A cluster of thunderstorms west of Boston may pose a risk
    for a few damaging wind gusts early this evening. Weakening of the
    storms is ongoing and should continue limiting the threat.

    DISCUSSION...KBOX radar data showed a line of thunderstorms along
    the CT MA border moving east around 45 mph. SPC mesoanalysis
    indicates around 2000 J/kg of MLCAPE is present but decreases
    considerably near the Atlantic coast. Several measured severe wind
    gusts near Springfield MA in the last hour suggest a few instances
    of wind damage may still be possible with these storms as they track
    toward the east early this evening. However, radar echo tops have
    shown a considerable decrease in the last half hour as storms
    approached the Boston and Providence metro regions. This suggests
    storms are weakening rapidly as diurnal heating is diminishing. The
    weakening trend is forecast to continue, but a few strong wind gusts
    may still accompany thunderstorms through early evening.

    ..Lyons.. 08/12/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!vDi_9uODl2ibEOWHYwBSR2R3xMvrSCglLkoB3nxdZiZxA0sRFV-zU26fRRkg_aAIlTI7uOR9$=
    for graphic product...

    ATTN...WFO...GYX...BOX...OKX...ALY...

    LAT...LON 42027328 43197236 43397155 42987103 42677086 42217051
    41827061 41467087 41297133 41307197 41547268 42027328=20



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