• MESO: Snow Squall

    From Weather Alert@21:1/175 to All on Fri Feb 26 23:24:00 2021
    ACUS11 KWNS 262230
    SWOMCD
    SPC MCD 262230
    UTZ000-IDZ000-NVZ000-270030-

    Mesoscale Discussion 0131
    NWS Storm Prediction Center Norman OK
    0430 PM CST Fri Feb 26 2021

    Areas affected...Southeast ID...Northeast NV...Northern UT

    Concerning...Snow Squall

    Valid 262230Z - 270030Z

    SUMMARY...A snow squall producing brief blizzard-like conditions
    should progress east-southeast before weakening after about 00-01Z.

    DISCUSSION...Surface observations and radar reflectivity confirm the
    presence of a snow squall along a cold front across a portion of the
    Snake Valley in south-central ID extending west-southwest across
    north-central NV. TWF measured a gust to 52 kt at 2141Z with less
    than quarter-mile visibility in snow reported in the most recent
    observation. JER also recorded a 35 kt gust at 2152Z with
    quarter-mile visibility in snow. The snow squall is being supported
    by a steep low-level lapse environment ahead of and along the front,
    in addition to strong low-level northwesterlies behind the front per time-series of CBX VWP data. Short-term guidance suggests this
    strong flow regime is likely greatest now at peak heating and should
    subside through the evening. 12Z HREF members and recent HRRR runs
    that suggested the potential for a snow squall also indicate a
    weakening trend to the squall after about 00-01Z. Until that time,
    the squall may affect portions of the I-84 and I-15 corridors in ID
    and far northern UT, and the I-80 corridor in NV.

    ..Grams.. 02/26/2021

    ATTN...WFO...SLC...PIH...LKN...

    LAT...LON 42851351 42971284 42811229 42481203 41861181 41411195
    41071266 40671383 40421510 40281643 40651717 40921752
    41271587 41851442 42311381 42851351
    ##
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