• MESO: Mesoscale Discussion 1817

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sun Aug 4 22:07:52 2024
    ACUS11 KWNS 042207
    SWOMCD
    SPC MCD 042207=20
    NDZ000-SDZ000-MTZ000-WYZ000-050000-

    Mesoscale Discussion 1817
    NWS Storm Prediction Center Norman OK
    0507 PM CDT Sun Aug 04 2024

    Areas affected...central and eastern Montana...western Dakotas

    Concerning...Severe potential...Watch possible=20

    Valid 042207Z - 050000Z

    Probability of Watch Issuance...60 percent

    SUMMARY...Storms capable of damaging wind to increase through the afternoon/evening.

    DISCUSSION...A shortwave moving eastward across Montana this
    afternoon will provide forcing for ascent to erode MLCIN and result
    in thunderstorm development over the next few hours. Across
    central/eastern Montana, daytime heating has yielded MLCAPE around
    1000 J/kg. Surface objective analysis and forecast soundings also
    show profiles with steep low to mid-level lapse rates, deeply mixed
    profiles, and large dew point depressions which all favor downward
    momentum transfer. Deep layer shear 30-40 kts should provide
    organization for storms to grow upscale and present risk of damaging
    wind. A watch may be needed in the next couple of hours.

    ..Thornton/Smith.. 08/04/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6N29g59JvNS1LejJiudTP0xuE4vR0CaN4fWStGWo2lnQTgO4WKnTFds6QJz57Z9SWx1rHbeXY= xOAyuoxj_oDJrYulwk$ for graphic product...

    ATTN...WFO...BIS...UNR...BYZ...GGW...RIW...

    LAT...LON 45291035 46300982 46830821 46880619 46820505 46640392
    46410358 45940359 45710365 45400391 45220427 45050504
    45010572 44980656 44980762 44920981 44881010 45291035=20


    =3D =3D =3D
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