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  • MESO: Mesoscale Discussion 0065

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, February 03, 2019 22:18:46
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    ACUS11 KWNS 032118
    SWOMCD
    SPC MCD 032118
    CAZ000-NVZ000-040315-

    Mesoscale Discussion 0065
    NWS Storm Prediction Center Norman OK
    0318 PM CST Sun Feb 03 2019

    Areas affected...Sierra Mountains

    Concerning...Heavy snow

    Valid 032118Z - 040315Z

    SUMMARY...Heavy snow, with rates of 1 inch per hour and locally
    exceeding 3 inches per hour at times -- especially at higher
    elevations, will develop into the evening.

    DISCUSSION...Strong, moist flow into a cooling troposphere is
    supporting efficient snow production across much of the Sierra
    Mountains. This large-scale pattern is expected to remain in place
    through the evening as strong deep-layer ascent increases in
    response to the next cyclone moving southward along the California
    coast. Increasing ascent is already evident on water-vapor and
    infrared satellite imagery, as well as in radar imagery, across the
    Sacramento Valley as cloud tops have cooled and banded/cellular
    echos have developed. As the lower troposphere cools, snow levels
    fall, and these cellular features move into the Sierras, snowfall
    rates briefly approaching 3 inches per hour may occur at elevations
    as low as 6000-7000 feet. Strong winds will accompany this heavy
    snow resulting in blizzard conditions at times.

    Although snow will continue well into the overnight snowfall rates
    may relax a bit overnight before picking up in intensity again
    tomorrow ahead of the next short-wave trough embedded within the
    larger-scale trough.

    ..Marsh.. 02/03/2019

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...REV...HNX...STO...

    LAT...LON 37431950 38332036 39532113 39712048 38901987 37781883
    37431950



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