• MESO: Mesoscale Discussion 1434

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jun 25 17:22:32 2025
    ACUS11 KWNS 251722
    SWOMCD
    SPC MCD 251722=20
    MDZ000-PAZ000-VAZ000-DCZ000-WVZ000-251915-

    Mesoscale Discussion 1434
    NWS Storm Prediction Center Norman OK
    1222 PM CDT Wed Jun 25 2025

    Areas affected...Eastern WV into parts of MD...VA...DC...and far
    south-central PA

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

    Valid 251722Z - 251915Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Localized damaging wind is possible this afternoon.

    DISCUSSION...Widely scattered storm development is underway early
    this afternoon from the eastern WV Panhandle into northern VA/MD.
    Midlevel lapse rates are notably weaker compared to areas farther
    south. However, strong heating of a richly moist airmass has allowed
    MLCAPE to increase into the 1500-2500 J/kg range. Storm organization
    will be limited by weak deep-layer flow/shear, though weak
    unidirectional west-northwesterly flow may allow for small
    southeastward-moving clusters if sufficient outflow consolidation
    can occur. Even in the absence of any organized clustering, very
    steep low-level lapse rates will result in potential for localized
    damaging downburst/outflow winds through the afternoon.

    ..Dean/Hart.. 06/25/2025

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!7uZZ3I9S-Y5igYYYaXZoxiQbMzeejKEGvNMV-KYfWVeAvRFZEJLxPQrkH7iBuc2qZ6fqeE4FX= ZDIIwW4QpkXPqitLeo$ for graphic product...

    ATTN...WFO...PHI...AKQ...CTP...LWX...RNK...PBZ...RLX...

    LAT...LON 39457904 40017707 39807619 39127615 38517617 37807636
    36787907 37997935 38737942 39097946 39457904=20

    MOST PROBABLE PEAK WIND GUST...55-70 MPH
    MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN


    =3D =3D =3D
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