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  • MESO: Mesoscale Discussion 0078

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Wed Jan 17 19:50:04 2024
    ACUS11 KWNS 171949
    SWOMCD
    SPC MCD 171949=20
    MTZ000-IDZ000-ORZ000-WAZ000-172345-

    Mesoscale Discussion 0078
    NWS Storm Prediction Center Norman OK
    0149 PM CST Wed Jan 17 2024

    Areas affected...Washington...northeast Oregon...northern
    Idaho...and western Montana

    Concerning...Heavy snow=20

    Valid 171949Z - 172345Z

    SUMMARY...Heavy snowfall rates between 1-2 inches per hour are
    probable - especially at higher elevations - through the afternoon
    and early evening.

    DISCUSSION...Surface observations over the past hour have reported
    an uptick in snowfall intensity across portions of OR and northern
    ID. This comes as a swath of precipitation becomes more widespread
    ahead of a compact, progressive upper disturbance moving into the
    Pacific Northwest. Lift will likely be focused/maximized along a
    mid-level baroclinic zone between 850-700 mb, which should overlap
    to some degree with a DGZ between 700-600 mb (based on recent
    forecast soundings). The combination of more focused ascent within a
    portion of the DGZ should support moderate to heavy snowfall rates
    up to 1 inch/hour. More localized orographic ascent will likely
    enhance snowfall rates within the higher elevations, and could
    support snowfall rates up to (and possibly exceeding) 2 inches/hour.
    A minimum in snowfall rates is anticipated across central WA where
    orographic ascent contribution will be considerably smaller.

    ..Moore.. 01/17/2024

    ...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!6xZA-w9eIwqkXTI_lpE7azNtSyTih7eLEHtfWlxHVH91FOqwr2yN2eSoGBZn-VC_e2D0UK_Ei= A9ltANbRs5sZ6Sa5RM$ for graphic product...

    ATTN...WFO...TFX...PIH...MSO...BOI...OTX...PDT...SEW...PQR...

    LAT...LON 43741612 44651774 44931811 45281833 45861883 46051943
    46172017 46232081 46132148 46802166 47772154 48162145
    48712115 48912075 48981908 48941667 48921651 48961360
    48821298 47921283 44061289 43751324 43471384 43451480
    43481542 43741612=20


    =3D =3D =3D
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