• MESO: Mesoscale Discussion 0526

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, May 26, 2018 02:18:17
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    ACUS11 KWNS 260218
    SWOMCD
    SPC MCD 260217
    TXZ000-OKZ000-260345-

    Mesoscale Discussion 0526
    NWS Storm Prediction Center Norman OK
    0917 PM CDT Fri May 25 2018

    Areas affected...Western OK...Western North TX

    Concerning...Severe Thunderstorm Watch 121...

    Valid 260217Z - 260345Z

    The severe weather threat for Severe Thunderstorm Watch 121
    continues.

    SUMMARY...Isolated strong wind gusts possible for the next hour or
    so across western OK and adjacent portion of western north TX.

    DISCUSSION...Thunderstorm moving across western OK has become
    outflow dominant, evidenced by the linear structure and fast
    southward progression. FDR VAD is currently reporting southeasterly
    winds ahead of this system and the resulting moist inflow will
    likely result in storm persistence for the next hour or so. Isolated
    strong wind gusts are primary severe threat. Additional development
    is not currently anticipated across the remainder of the watch area.

    ..Mosier.. 05/26/2018

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

    ATTN...WFO...FWD...OUN...SJT...LUB...AMA...

    LAT...LON 35000028 35399991 35469916 34439823 33299788 32939965
    33460022 35000028



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, May 04, 2019 13:52:17
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    ACUS11 KWNS 041352
    SWOMCD
    SPC MCD 041351
    ALZ000-MSZ000-LAZ000-041515-

    Mesoscale Discussion 0526
    NWS Storm Prediction Center Norman OK
    0851 AM CDT Sat May 04 2019

    Areas affected...Southern Louisiana to far southern Mississippi

    Concerning...Severe Thunderstorm Watch 129...

    Valid 041351Z - 041515Z

    The severe weather threat for Severe Thunderstorm Watch 129
    continues.

    SUMMARY...An isolated severe risk in the form of locally damaging
    winds and/or a brief tornado will continue to shift eastward across
    southeast Louisiana toward coastal Mississippi. Severe Thunderstorm
    Watch 129 will be allowed to expire at/by 15Z. While an additional
    Watch to its east is not imminent/certain (40% probability),
    convective trends will continue to be monitored.

    DISCUSSION...A nearly continuous north/south-oriented line of
    convection continues to progress east-northeastward across coastal south-central Louisiana, with other more discrete storms preceding
    it. The 12Z observed sounding from LIX/Slidell LA sampled a moist
    environment with a 1.83 PW and 15.4 g/kg mean mixing ratio. Although
    cloud cover is prevalent ahead of the linearly organized convection,
    inhibition should gradually erode as temperatures climb through the
    upper 70s toward 80 F. This should allow for a gradual
    intensification of updrafts/downdrafts, although currently observed
    modest low-level/deep-layer shear may limit the overall
    magnitude/certainty of the severe risk. While an additional Watch
    issuance is not certain or imminent, areas including southeast
    Louisiana and southern Mississippi will continue to be monitored for
    an increasing damaging wind/tornado risk.

    ..Guyer.. 05/04/2019

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

    ATTN...WFO...MOB...JAN...LIX...LCH...

    LAT...LON 30549174 30929155 31199061 31278885 31228841 30518826
    28938886 28349121 28529157 29739151 30369196 30549174



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