Subj : MESO: Mesoscale Discussion 0268
To   : wx-storm@lists.illinois.edu
From : COD Weather Processor
Date : Fri Mar 10 2023 23:51:55

ACUS11 KWNS 102351
SWOMCD
SPC MCD 102351=20
NDZ000-MTZ000-110345-

Mesoscale Discussion 0268
NWS Storm Prediction Center Norman OK
0551 PM CST Fri Mar 10 2023

Areas affected...Northeast Montana

Concerning...Heavy snow=20

Valid 102351Z - 110345Z

SUMMARY...Heavy snowfall and localized blizzard conditions are
expected to become more widespread across northeast Montana through
the late evening hours.

DISCUSSION...Over the past few hours, mid-level water vapor imagery
has shown a steady increase in isentropic ascent within the warm
conveyor region of a deepening cyclone across the northern Rockies.
Consequently, precipitation has increased in spatial coverage across
northern to north-central MT over the past 1-2 hours with a few
transient snow bands noted. This trend is expected to persist for
the next several hours as the low translates into the northern High
Plains and undergoes further deepening. Gradually cooling
temperatures aloft coupled with increasing mid-level saturation
should result in a roughly 100 mb deep DGZ co-located with
persistent ascent near 700 mb that will foster moderate to heavy
snowfall rates upwards of 1-2 inches per hour.=20

Across far northeast MT, multiple surface stations are already
reporting sustained 20-30 knot winds with occasional gusts between
30-40 knots. Visibility reductions to 1/4 mile or less have also
been periodically noted with the passage of heavier precipitation.
While blizzard conditions are currently rather isolated and
transient based on surface observations and regional web cams, the
combination of increasing heavy snowfall potential and strengthening
easterly gradient winds will yield more widespread blizzard
conditions through the late evening/overnight hours.

...Moore.. 03/10/2023

....Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj=
g!5Wqq0S8YJgSOA-vZdyXGBBJyCtX1TfILA_JOqc89VUzUkvlIBa9kh7xqq3FO0oYTUdL4qKmKn=
-mVH1s3KZr1mUIg7fE$  for graphic product...

ATTN...WFO...BIS...GGW...TFX...

LAT...LON   47670681 47590821 47540952 47501055 47821146 48371150
            48871121 49041085 49030960 49040654 49050488 49050397
            48620362 48070378 47790437 47730525 47670681=20


=3D =3D =3D
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