• MESO: Mesoscale Discussion 1556

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Aug 18 20:36:19 2021
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    ACUS11 KWNS 182036
    SWOMCD
    SPC MCD 182035=20
    UTZ000-NVZ000-182230-

    Mesoscale Discussion 1556
    NWS Storm Prediction Center Norman OK
    0335 PM CDT Wed Aug 18 2021

    Areas affected...Central Utah

    Concerning...Severe Thunderstorm Watch 448...

    Valid 182035Z - 182230Z

    The severe weather threat for Severe Thunderstorm Watch 448
    continues.

    SUMMARY...The severe wind potential continues across WW 448 as
    thunderstorms continue to increase in coverage.

    DISCUSSION...Radar trends over the past hour have shown an increase
    in thunderstorm coverage across central to southern Utah along and
    ahead of a cold front that is slowly migrating to the
    south/southeast. While most storms have been transient in nature, a
    few have shown signs of organization with strong downdrafts, and a
    53 mph wind gust was recently noted in central UT associated with a
    strong thunderstorm. The overall thermodynamic and kinematic
    environment remains supportive for transient organized convection,
    and low-level lapse rates have steepened to near 10 C/km (per recent mesoanalysis estimates) across west and east-central UT where
    temperatures have warmed into the upper 80s. Favorable lift will
    remain over the region heading into the evening hours, so the severe
    wind potential will continue - especially across the aforementioned
    areas with the steepest boundary-layer lapse rates.

    ..Moore.. 08/18/2021

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!rnWoliz_PB62jLHJ0WhAti9JfIWV8PpOcoZkt4rCYZWsN6v2m0p62fDP0hYjttg2Odxs6wXJ$=
    for graphic product...

    ATTN...WFO...GJT...SLC...VEF...

    LAT...LON 38611409 38811328 39361197 39631090 39530962 39130927
    38480939 38050999 37591090 37431153 37391269 37491337
    37731401 38111423 38611409=20



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