• MESO: Mesoscale Discussion 1557

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, October 10, 2018 12:07:24
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    ACUS11 KWNS 101207
    SWOMCD
    SPC MCD 101206
    FLZ000-101300-

    Mesoscale Discussion 1557
    NWS Storm Prediction Center Norman OK
    0706 AM CDT Wed Oct 10 2018

    Areas affected...FL Big Bend

    Concerning...Tornado Watch 406...

    Valid 101206Z - 101300Z

    The severe weather threat for Tornado Watch 406 continues.

    SUMMARY...The supercell tornado risk is likely beginning to move
    onshore and will likely focus near the Apalachee Bay coastal areas
    during the 8-10am EDT period.

    DISCUSSION...Radar imagery from KTLH shows a cluster of
    quasi-discrete supercells over Apalachee Bay moving northwest
    towards the Wakulla County coast. It is here that the supercell
    tornado risk appears focused during the next few hours as this
    convection moves ashore. Inputting the supercell motion (150
    degrees at 40 kt) yields 240 m2/s2 0-1 km SRH per KTLH VAD data.
    Low-level shear will likely increase further and become more
    favorable for low-level mesocyclones and an EF0-EF2 tornado risk
    this morning with the persistent/more intense mesocyclones.

    ..Smith.. 10/10/2018

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

    ATTN...WFO...TAE...

    LAT...LON 29798462 30098475 30358450 30118380 29668355 29468367
    29798462



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