• MESO: Mesoscale Discussion 1522

    From COD Weather Processor@1:2320/127 to wx-storm@lists.illinois.edu on Mon Jul 6 18:12:38 2026
    ACUS11 KWNS 061812
    SWOMCD
    SPC MCD 061811=20
    MNZ000-SDZ000-NDZ000-062015-

    Mesoscale Discussion 1522
    NWS Storm Prediction Center Norman OK
    0111 PM CDT Mon Jul 06 2026

    Areas affected...Eastern North Dakota...northwest
    Minnesota...northeast South Dakota

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

    Valid 061811Z - 062015Z

    Probability of Watch Issuance...80 percent

    SUMMARY...Large hail and severe winds are possible with initial
    supercells that will eventually grow upscale into a more organized
    cluster/MCS. A watch is likely this afternoon.

    DISCUSSION...A slow moving cold front continues southeastward within
    the northern Plains. Though influence from the shortwave trough in
    Canada is minimal, areas of strong heating of and upper 60s to low
    70s F dewpoint airmass is allowing cumulus to deepen along parts of
    the boundary. Additionally, mid-level convection will move eastward
    through the Dakotas and may gradually root near the surface. The
    strongest initial development will likely occur along the Canadian
    border in northwest Minnesota given the greater surface heating and
    nominally greater mid-level ascent. Effective shear of 35-40 kt will
    support a mixture of supercells and multicells. With time, linear
    forcing along the cold front and cold pool mergers will lead to a
    broader linear structure. Initial supercells would be capable of
    large hail up to 2 inches. As activity congeals, severe wind
    gusts/wind damage would become more likely. The environment into the Mississippi Valley becomes less favorable. Movement of storms toward
    the south/southeast into the greater buoyancy is expected with time.

    ..Wendt/Hart.. 07/06/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!8fb_wudbuBzik2zWjcR-kSXj8N7xpKD4XZTFzB7myx8X8xTmm_DcfywIP47YWWO_mPxEsFPnx= 1qcAGY_7MkXeBSyqu8$ for graphic product...

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

    LAT...LON 45739785 46109810 48279763 49079707 49179637 48959581
    46519627 45859646 45659673 45739785=20

    MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
    MOST PROBABLE PEAK WIND GUST...65-80 MPH
    MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN


    =3D =3D =3D
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    * Origin: Capitol City Weather Station (1:2320/127)