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  • MESO: Mesoscale Discussion 0826

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Friday, June 22, 2018 20:03:50
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    ACUS11 KWNS 222003
    SWOMCD
    SPC MCD 222003
    MSZ000-LAZ000-ARZ000-222130-

    Mesoscale Discussion 0826
    NWS Storm Prediction Center Norman OK
    0303 PM CDT Fri Jun 22 2018

    Areas affected...Southern Arkansas...Northeast Louisiana...and
    western Mississippi

    Concerning...Severe Thunderstorm Watch 197...

    Valid 222003Z - 222130Z

    The severe weather threat for Severe Thunderstorm Watch 197
    continues.

    SUMMARY...The severe weather threat continues for Severe
    Thunderstorm Watch 197 as storms slowly drift southward.

    DISCUSSION...Storms have predominantly stayed in southern Arkansas
    thus far. However, within the last hour, additional storms have
    developed along the outflow boundary from earlier convection in
    northeast Louisiana. While ongoing and earlier storms continue to
    stabilize the environment in northeast Louisiana and western
    Mississippi, better deep layer shear will help the severe threat to
    persist in this area. The western edge of the storms in southern
    Arkansas have weakened during the past 2 hours, but given there is
    still an agitated cumulus field along the front at the AR/LA/TX
    border, additional storm development is possible in the next few
    hours which would impact the western portion of WW197. This area is
    very unstable with MLCAPE of 2000 to 3000 J/kg, however deep layer
    shear is weaker (~30 knots per KSHV VWP) which may limit storm
    organization and longevity for any of this development.

    ..Bentley.. 06/22/2018

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

    ATTN...WFO...JAN...LIX...LZK...LCH...SHV...

    LAT...LON 30969166 31709297 31709297 31709298 32249343 32979352
    32979352 32979352 33259348 33439337 33439337 33459322
    33459312 33099066 32888973 32588931 31878931 31798931
    31438940 30969166 30969166



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