• MESO: Mesoscale Discussion 0315

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wednesday, May 02, 2018 19:48:03
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    ACUS11 KWNS 021947
    SWOMCD
    SPC MCD 021947
    KSZ000-022145-

    Mesoscale Discussion 0315
    NWS Storm Prediction Center Norman OK
    0247 PM CDT Wed May 02 2018

    Areas affected...Northeast Kansas and northwest Missouri

    Concerning...Tornado Watch 61...

    Valid 021947Z - 022145Z

    The severe weather threat for Tornado Watch 61 continues.

    SUMMARY...Latest guidance shows increasing concern for severe,
    damaging wind this afternoon and evening across portions of central
    Kansas ahead of an intensifying cluster of thunderstorms across
    southwest Kansas. These thunderstorms will move quickly to the
    northeast.

    DISCUSSION...Latest observations suggest mesoscale organization of
    the thunderstorm activity, with attendant rear-inflow jet
    development, across southwest Kansas. This larger-scale organization
    will support thunderstorm longevity as they move into an environment characterized by 2500-3000 J/kg of mixed-layer CAPE and low-level
    lapse rates around 8 C/km. This environment and the approaching
    convective complex will support downward momentum transfer of strong lower-tropospheric flow resulting in an heightened potential for
    significant severe thunderstorm wind swaths at the surface,
    potentially in excess of 70-80 mph. As such, an increase in
    significant wind potential is expected over the next few hours.

    ..Marsh.. 05/02/2018

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

    ATTN...WFO...ICT...DDC...

    LAT...LON 37889940 38299885 38629810 38649753 38459746 38149781
    37829856 37569915 37469934 37669943 37889940



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Saturday, April 13, 2019 09:51:20
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    ACUS11 KWNS 130951
    SWOMCD
    SPC MCD 130950
    TXZ000-131045-

    Mesoscale Discussion 0315
    NWS Storm Prediction Center Norman OK
    0450 AM CDT Sat Apr 13 2019

    Areas affected...portions of west-central Texas southward toward the
    Rio Grande

    Concerning...Tornado Watch 49...

    Valid 130950Z - 131045Z

    The severe weather threat for Tornado Watch 49 continues.

    SUMMARY...The severe threat continues across WW 49.

    DISCUSSION...Convection has generally struggled to deepen across the
    WW area this morning, although one cell recently crossed the Rio
    Grande near DFX. This storm is surviving despite weak inhibition,
    and has a threat of all modes of severe as long as it can persist.

    Uncertainty persists with regard to the extent of convection across
    the region. However, it appears that severe convection will remain
    possible through the entirety of the valid WW period as the region
    remains under the grazing influence of ascent from a mid-level wave
    over New Mexico/northern Mexico. It is also possible that
    convection moving eastward from Terrell County may interact
    favorably with the warm frontal zone near that region and pose a
    severe threat as well. PFCs/profiles remain supportive of organized
    convection favoring all modes of severe - thus the severe threat
    across WW 49 continues.

    ..Cook.. 04/13/2019

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

    ATTN...WFO...CRP...EWX...SJT...MAF...

    LAT...LON 30960166 31170143 31200048 31139957 30959893 30489859
    29739855 28949864 28699872 28639925 28590025 28820089
    29290127 29630168 29920185 30490185 30960166



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