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  • MESO: Mesoscale Discussion 1892

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Mon Aug 7 20:40:52 2023
    ACUS11 KWNS 072040
    SWOMCD
    SPC MCD 072040=20
    PAZ000-MDZ000-VAZ000-DCZ000-WVZ000-072215-

    Mesoscale Discussion 1892
    NWS Storm Prediction Center Norman OK
    0340 PM CDT Mon Aug 07 2023

    Areas affected...portions of central and northern Virginia into
    central Maryland and southern to central Pennsylvania

    Concerning...Tornado Watch 602...

    Valid 072040Z - 072215Z

    The severe weather threat for Tornado Watch 602 continues.

    SUMMARY...The severe threat continues across Tornado Watch 602.
    Damaging gusts appear to be the main threat, but a couple of
    tornadoes may still occur with supercells or line-embedded
    circulations.

    DISCUSSION...A QLCS has developed across western MD into northern
    VA, which is preceded and flanked (to the south) by relatively
    discrete, longer lived supercell structures. Near 90F surface
    temperatures reside ahead of the QLCS, suggesting ample boundary
    layer heating and buoyancy are available to support several damaging
    gusts over the next few hours. A couple instances of large hail may
    still occur with ongoing supercells. Furthermore, the 850 mb
    southwesterly low-level jet axis continues to shunt eastward over
    the central Appalachians and may still overspread portions of the
    Mid Atlantic by evening. Should this occur, low-level shear may
    increase further, supporting the development of a couple of
    tornadoes with either ongoing supercells or line-embedded
    circulations.

    ..Squitieri.. 08/07/2023

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!5RyhrgwONWJg8pl7UQEb64aRBzFkwfybNUado2r8_6oGPaTHESTtbW-RjUw_pkkPpTgR_eQMl= fSSCbYVwenG32-mBu0$ for graphic product...

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

    LAT...LON 37777883 38087906 39697797 41557668 41507643 40967626
    40247614 39737628 39147635 38507657 38077681 37667732
    37777883=20


    =3D =3D =3D
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