• MESO: Mesoscale Discussion 1449

    From COD Weather Processor@1:2320/127 to wx-storm@lists.illinois.edu on Thu Jul 2 22:11:03 2026
    ACUS11 KWNS 022211
    SWOMCD
    SPC MCD 022210=20
    WIZ000-ILZ000-030015-

    Mesoscale Discussion 1449
    NWS Storm Prediction Center Norman OK
    0510 PM CDT Thu Jul 02 2026

    Areas affected...Southern Wisconsin

    Concerning...Severe Thunderstorm Watch 440...

    Valid 022210Z - 030015Z

    The severe weather threat for Severe Thunderstorm Watch 440
    continues.

    SUMMARY...The potential for severe wind gusts should increase across
    southern Wisconsin over the next 1-2 hours.

    DISCUSSION...The development of a consolidated cold pool has become
    evident in velocity data from KARX and KMKX over the past hour. This
    appears to confirm the expected mode transition from broken cells to
    a more cohesive convective band/MCS. Downstream, the environment
    across southern WI is favorable for MCS maintenance with a pocket of
    2000-2500 J/kg MLCAPE and around 30 knots of effective bulk shear in
    place per recent mesoanalyses and regional VWPs. Based on this
    parameter space, maximum wind speeds within the MCS may be as high
    as 65-75 mph (a recent 62 mph gust was noted at KLNR with the
    passage of the line). This threat appears most likely to manifest
    roughly along and just south of the I-94 corridor. 20 knot 0-3 km
    bulk shear vectors noted in regional VWPs are oriented roughly
    orthogonal to the developing line, which may support some brief
    circulations as well.

    ..Moore.. 07/02/2026

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!4GZi0hSEJpvFBPijEVvSGi1Yhjd_UGhgbC1TSKHC6RUmzUKYg0gqMcYoLK1u4hs4HRvItY5OZ= UWw3eFOnK6ssV10F-I$ for graphic product...

    ATTN...WFO...LOT...MKX...DVN...ARX...

    LAT...LON 42589046 42789006 43078982 43318964 43478956 43558938
    43608772 43228779 43008782 42828774 42648772 42538775
    42498781 42489011 42509027 42589046=20

    MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
    MOST PROBABLE PEAK WIND GUST...65-80 MPH
    MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN


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