• MESO: Mesoscale Discussion 0416

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Monday, May 14, 2018 22:04:59
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    ACUS11 KWNS 142204
    SWOMCD
    SPC MCD 142204
    KSZ000-COZ000-150000-

    Mesoscale Discussion 0416
    NWS Storm Prediction Center Norman OK
    0504 PM CDT Mon May 14 2018

    Areas affected...East-central CO...Western KS

    Concerning...Severe potential...Watch unlikely

    Valid 142204Z - 150000Z

    Probability of Watch Issuance...20 percent

    SUMMARY...A strong thunderstorm cluster moving out of eastern CO
    will continue to pose a threat of large hail and perhaps severe wind
    gusts into portions of western KS into early evening.

    DISCUSSION...A potentially severe thunderstorm is ongoing across
    east-central CO at 22Z, moving east-southeast toward western KS.
    Moderate instability and strong effective shear of 40-50 kt will
    continue to support organization with vigorous updrafts across this
    region. Some uncertainty exists regarding the longevity of this
    storm, as the character of boundary-later cumulus on visible
    satellite imagery suggests that some capping remains. However, some
    large hail and severe wind threat will exist for at least the short
    term, with some threat potentially persisting into early evening if
    any upscale growth occurs. At this time, the threat is expected to
    remain too isolated and marginal for watch issuance, though this
    will be reevaluated if convective organization increases downstream.

    ..Dean/Hart.. 05/14/2018

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

    ATTN...WFO...DDC...GLD...BOU...

    LAT...LON 39260340 39660297 39800202 39410113 38640082 38420102
    38660198 38910308 39260340



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  • From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, April 21, 2019 20:23:13
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    ACUS11 KWNS 212023
    SWOMCD
    SPC MCD 212022
    KSZ000-COZ000-212215-

    Mesoscale Discussion 0416
    NWS Storm Prediction Center Norman OK
    0322 PM CDT Sun Apr 21 2019

    Areas affected...Eastern CO...Northwest KS

    Concerning...Severe potential...Watch unlikely

    Valid 212022Z - 212215Z

    Probability of Watch Issuance...20 percent

    SUMMARY...Gusty winds are expected with convection as it spreads
    into northwest KS. WW is not anticipated.

    DISCUSSION...Strong boundary-layer heating has contributed to steep
    low-level lapse rates across the central High Plains this afternoon.
    Surface temperatures have warmed into the 80s across east-central CO...northeast along a boundary draped across northwest KS. As a
    result, deeply mixed boundary layer is conducive for high-based
    thunderstorm development. Over the last hour or so, convection has
    developed along the trailing wind shift stretching from Arapahoe-Elbert-Cheyenne counties in CO. This activity is expected
    to propagate into northwest KS over the next few hours along
    aforementioned wind shift. With relatively dry sub-cloud conditions
    (temp-dew point spreads on the order of 40F), gusty winds should be
    common beneath heavier rain bursts. Small hail may also accompany
    the strongest storms.

    ..Darrow/Thompson.. 04/21/2019

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

    ATTN...WFO...DDC...GLD...PUB...

    LAT...LON 39410240 39419997 38450018 38280200 38640263 39410240



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