• MESO: Mesoscale Discussion 0430

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Tuesday, May 15, 2018 19:33:57
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    ACUS11 KWNS 151933
    SWOMCD
    SPC MCD 151933
    CTZ000-NYZ000-NJZ000-PAZ000-DEZ000-MDZ000-152130-

    Mesoscale Discussion 0430
    NWS Storm Prediction Center Norman OK
    0233 PM CDT Tue May 15 2018

    Areas affected...Eastern Pennsylvania...far southern New York...New Jersey...northern Delaware

    Concerning...Severe Thunderstorm Watch 95...

    Valid 151933Z - 152130Z

    The severe weather threat for Severe Thunderstorm Watch 95
    continues.

    SUMMARY...Damaging wind and hail are likely to progress into eastern Pennsylvania, New Jersey, and southern New York over the next
    several hours.

    DISCUSSION...A line of severe storms currently stretches from
    northeastern PA into south-central PA along a cold front, and
    eastward near the old outflow boundary across southern NY into
    western MA and CT. A very warm and moist air mass has developed
    ahead of the cold front, with temperatures approaching 90 F and
    dewpoints in the 68-70 F range across PA and NJ. This high theta-e
    air mass combined with 7.0+ C/km midlevel lapse rates is creating a
    strongly unstable environment which will support severe storms as
    they continue eastward.

    ..Jewell.. 05/15/2018

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

    ATTN...WFO...BOX...OKX...ALY...PHI...BGM...CTP...LWX...

    LAT...LON 40267756 40947612 41707482 41947398 41957305 41647236
    41127225 40717242 40577320 40427386 39897396 39247429
    38957485 39147549 39297593 39627672 39827729 40267756



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, April 24, 2019 04:51:01
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    ACUS11 KWNS 240450
    SWOMCD
    SPC MCD 240450
    TXZ000-240615-

    Mesoscale Discussion 0430
    NWS Storm Prediction Center Norman OK
    1150 PM CDT Tue Apr 23 2019

    Areas affected...Parts of the Edwards Plateau

    Concerning...Severe Thunderstorm Watch 97...

    Valid 240450Z - 240615Z

    The severe weather threat for Severe Thunderstorm Watch 97
    continues.

    SUMMARY...Severe hail may continue another couple of hours, along
    with potential for increasing damaging winds, in association with a
    supercell approaching the San Angelo vicinity through 2-3 AM CDT.

    DISCUSSION...Conglomerate outflow associated with increasingly
    extensive convective development has gradually advanced southward
    into the Edwards Plateau region during the past few hours. This is
    providing a continuing focus for strong low-level convergence,
    enhanced by modest to weak southeasterly low-level flow beneath a
    possible 50 kt west-southwesterly mid-level speed maximum
    propagating into/through the region.

    This configuration is contributing to moderately strong easterly
    storm-relative inflow of moist and moderately unstable air (CAPE of
    1000-1500 J/kg) into a sustained supercell emerging from southwest
    Texas. MRMS-MESH data indicates that this storm is probably still
    producing severe hail. As it progresses eastward there appears
    potential for interaction with the outflow boundary that may lead to
    a transition increasingly supportive of a corridor of strong wind
    gusts, and eastward acceleration into the San Angelo vicinity
    through 07-08Z.

    ..Kerr.. 04/24/2019

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

    ATTN...WFO...SJT...MAF...

    LAT...LON 31550187 31720124 31650030 31040035 30900105 30850184
    31080207 31550187



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