• Enhanced Risk CO/KS

    From Mike Powell@618:250/1 to All on Sat Jun 8 10:17:00 2024
    ACUS01 KWNS 081151
    SWODY1
    SPC AC 081150

    Day 1 Convective Outlook
    NWS Storm Prediction Center Norman OK
    0650 AM CDT Sat Jun 08 2024

    Valid 081300Z - 091200Z

    ...THERE IS AN ENHANCED RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
    AND EVENING ACROSS PORTIONS OF EASTERN COLORADO AND WESTERN
    KANSAS...

    ...SUMMARY...
    Scattered severe thunderstorms are expected to develop across the
    central High Plains this afternoon then spread toward central Kansas
    during the evening. Isolated severe storms may also occur across the
    Ozarks vicinity.

    ...CO/KS...
    Early morning water vapor imagery shows a well-defined mid-level
    shortwave trough over northern UT. This feature will track eastward
    today, spreading large-scale ascent and increasing mid-level
    moisture into the high plains of CO. A combination of daytime
    heating and the approaching upper system will lead to scattered
    thunderstorms by early afternoon from southeast WY into the
    foothills of northern CO. Storms will intensify and track
    east-southeastward in the vicinity of a surface boundary that will
    extend into western KS. Supercells capable of very large hail and
    damaging winds will be possible for the first few hours of the
    event, with upscale organization into a linear MCS expected as the
    storms move into KS. A consensus of CAM solutions show the
    potential for rather widespread damaging winds during the evening
    before storms weaken over central KS after midnight.

    ...Central/Southern MO...
    A large but decaying MCS is currently moving across MO. Recent
    model guidance suggests that rapid moisture return will occur behind
    this system, with a reservoir of low 70s dewpoints and strong
    afternoon heating expected. This will yield MLCAPE values of
    2500-3500 J/kg, along with faster westerly flow aloft. Low-level
    forcing mechanisms will be weak, and there is uncertainty where the
    axis of convective development will occur. But it appears likely
    that scattered afternoon supercell storms will be possible, capable
    of large hail and damaging winds. An isolated tornado or two is
    also possible.

    ..Hart/Bentley.. 06/08/2024

    $$
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