• MESO: Mesoscale Discussion 1813

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Aug 4 14:32:48 2024
    ACUS11 KWNS 041432
    SWOMCD
    SPC MCD 041432=20
    FLZ000-GAZ000-041600-

    Mesoscale Discussion 1813
    NWS Storm Prediction Center Norman OK
    0932 AM CDT Sun Aug 04 2024

    Areas affected...portions of the western and central Florida
    Peninsula

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

    Valid 041432Z - 041600Z

    Probability of Watch Issuance...95 percent

    SUMMARY...Increasing diurnal heating on the outer envelope of
    intensifying TC Debby will likely support supercell development
    through much of the Day. Intensifying low-level shear may support a
    few tornadoes. A new Tornado Watch is likely.

    DISCUSSION...As of 1425 UTC, regional radar analysis placed the
    developing center of intensifying TC Debby approximately 105 nm
    west-southwest of KTBW. Latest NHC projections show continued
    intensification of the system west of the FL Peninsula. To the east
    of the main envelope of the TC, diurnal heating has commenced inland
    with temperatures warming into the mid 80s F. As heating continues,
    moderate buoyancy will likely support the development of scattered thunderstorms on the outer convergence bands. As the TC deepens,
    low-level wind fields should intensify through the morning and early
    afternoon. area VADs already show 0-1km SRH around 200-250 m2/s2
    with weak mesocyclones noted within some of the stronger convective
    elements. As low-level shear intensifies, continued low-level
    updraft rotation appears probable with mini supercell structures. A
    few tornadoes are likely as storms intensify within the deepening
    buoyancy and stronger shear regime.

    Model guidance and observational trends suggest tornado potential is
    highest where the low-level flow retains the most easterly
    component, roughly along and north of the I-4 corridor later today.
    However, given the expected intensification of Debby, tornadoes will
    be possible across much of the western and central Peninsula as the
    bands move onshore and encounter stronger shear/buoyancy. Given the
    increasing risk for tornadoes, a Tornado Watch will likely be
    needed.

    ..Lyons/Hart.. 08/04/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!-x7P88-D6jqXZiu_bRM28rkDq9u2HiOoPxLwJr_tZ4V3XDUDcwUJh2F7_FgAP1MuElRA_pxmJ= bWaAGcc9byZmen1f3k$ for graphic product...

    ATTN...WFO...MFL...MLB...TBW...JAX...TAE...

    LAT...LON 25778137 26018176 26418191 26728223 27758282 28658270
    29208306 29778348 30088398 30128424 30438424 30638396
    30638301 30478247 29388163 28708135 27838109 26708098
    26248100 25668119 25778137=20


    =3D =3D =3D
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