MD 2061 CONCERNING SNOW SQUALL FOR SOUTHEAST KANSAS…NORTHEAST OKLAHOMA…NORTHWEST ARKANSAS AND SOUTHWEST MISSOURI
Mesoscale Discussion 2061
NWS Storm Prediction Center Norman OK
0946 AM CST Thu Dec 22 2022
Areas affected...Southeast Kansas...northeast Oklahoma...northwest
Arkansas and southwest Missouri
Concerning...Snow Squall
Valid 221546Z - 221945Z
SUMMARY...Snow squalls are expected to linger through early
afternoon across portions of southeast Kansas, northeast Oklahoma,
northwest Arkansas, and southwest Missouri as a snow band pushes
east/southeast.
DISCUSSION...Recent surface observations across southeast KS and
northeast OK show periodic blizzard conditions associated with a
persistent mesoscale snow band evident in regional radar mosaics.
This band is primarily being driven by weak frontogenesis within the
850-700 mb layer combined with broad ascent within the left-exit
region of a strong upper-level jet nosing into the southern Plains.
Recent forecast guidance suggests this band will continue to push
east/southeast through early afternoon as the upper jet moves east.
Rapid cooling and saturation within the -12 to -17 C layer behind
the initial frontal passage will result in a ~100 mb DGZ favorable
for maintenance of moderate snowfall rates within the snow band.
Additionally, strong cold advection within the lowest 1 km will
allow for efficient mixing of 35-45 knots winds coincident with
moderate snowfall rates. This combination of moderate snowfall and
strong, gusty winds will result in periodic blizzard conditions with
visibility reductions to 1/4 mile possible. Snow squall potential
will be highest along the I-44 corridor from northeast OK into
southwest MO, but snow squall conditions may develop as far south as
the I-40 corridor in eastern OK over the next 2-4 hours.
..Moore.. 12/22/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...LZK...SGF...EAX...TSA...TOP...ICT...OUN...
LAT...LON 37309766 37779714 38109493 38499382 38339298 38019244
37459217 36969232 36279310 35699383 34919483 34869552
35099611 36559733 37309766
