• MESO: Mesoscale Discussion 0934

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, June 29, 2018 03:22:14
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    ACUS11 KWNS 290322
    SWOMCD
    SPC MCD 290321
    MNZ000-NDZ000-SDZ000-290445-

    Mesoscale Discussion 0934
    NWS Storm Prediction Center Norman OK
    1021 PM CDT Thu Jun 28 2018

    Areas affected...Much of ND...Extreme Northern SD...Northwest MN

    Concerning...Severe potential...Severe Thunderstorm Watch likely

    Valid 290321Z - 290445Z

    Probability of Watch Issuance...95 percent

    SUMMARY...Strong wind gusts, and perhaps a few tornadoes, will
    remain possible across much of ND and into northwest MN over the
    next several hours. A new watch will be needed to cover these
    potential hazards.

    DISCUSSION...Well-organized convective line currently moving through
    northwest ND is expected to continue progressing quickly eastward
    across northern/central ND and eventually into far northwest MN
    later tonight. Current motion estimates have the line moving east at
    about 45 kt. Severe gusts have been measured at several sites as
    this line has moved through, including 55 kt at SDY and 59 kt at
    ISN. There is also some potential for the discrete storms across
    southeast MT to grow upscale into another organized MCS that moves
    generally eastward.

    Continued low-level moisture advection supported by the
    strengthening low-level jet and the presence of moderate to strong
    instability will help maintain storm intensity as it progresses
    eastward. Primary severe hazard will be severe wind gusts, with
    isolated instances of winds greater than 64 kt possible. Given the
    strong low-level flow and potential for outflow surges within the
    convective line, a few QLCS tornadoes are also possible,
    particularly near the warm front. Given this anticipated threat, a replacement/new watch will be needed across much of ND and into
    northwest MN before 04Z.

    ..Mosier/Edwards.. 06/29/2018

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

    ATTN...WFO...FGF...ABR...BIS...UNR...

    LAT...LON 48650385 49000224 48959964 48619647 48019495 46259590
    45720240 46320394 48650385



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