• MESO: Mesoscale Discussion 0807

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, June 20, 2018 22:14:12
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    ACUS11 KWNS 202214
    SWOMCD
    SPC MCD 202213
    IAZ000-ILZ000-210015-

    Mesoscale Discussion 0807
    NWS Storm Prediction Center Norman OK
    0513 PM CDT Wed Jun 20 2018

    Areas affected...Northern and eastern Iowa

    Concerning...Tornado Watch 195...

    Valid 202213Z - 210015Z

    The severe weather threat for Tornado Watch 195 continues.

    SUMMARY...Severe threat continues across WW 0195, though tornado
    threat is decreasing. An additional tornado watch is not
    anticipated.

    DISCUSSION...Cellular storms with a history of isolated tornadoes
    have grown upscale along a confluence zone associated with a
    low-level cyclone in central Iowa. Convection has also grown upscale
    along a second confluent zone in far east Iowa. The central Iowa
    band has been propagating northward/eastward into a region of weaker
    buoyancy. Given the more linear nature of convection along both
    confluent bands, the tornado risk seems to be decreasing, though a
    tornado or two still cannot be ruled out for the remainder of the
    watch period.

    ..Squitieri/Cook/Grams.. 06/20/2018

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

    ATTN...WFO...DVN...ARX...DMX...

    LAT...LON 42529428 42699468 43139477 43329436 43199353 42989266
    42779188 42419112 41949067 41679055 41449056 40959088
    40779145 40849231 41199270 41879324 42529428



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