MD 2056 CONCERNING SNOW SQUALL FOR SOUTHERN WYOMING…SOUTHWEST SOUTH DAKOTA…WESTERN NEBRASKA…AND NORTHERN COLORADO
Mesoscale Discussion 2056
NWS Storm Prediction Center Norman OK
0315 PM CST Wed Dec 21 2022
Areas affected...southern Wyoming...southwest South Dakota...western
Nebraska...and northern Colorado
Concerning...Snow Squall
Valid 212115Z - 220015Z
SUMMARY...Snow squalls will persist into the evening across portions
of the central Rockies and central High Plains.
DISCUSSION...A very strong arctic front continues to move south
across the central High Plains with temperature gradients of 40-50F
along the front. Several bands of snow have developed near the
vicinity of this front with moderate to heavy snow being observed.
In addition, winds are very strong with 30-40 knot winds both north
and south of the front with observed gusts in excess of 50 knots.
These winds, combined with multiple bands of snow have led to snow
squall conditions across much of Wyoming and southwest South Dakota
this afternoon. These conditions continue to shift south with the
surface front. Observed visibility restrictions have been greatest
north of the front, likely due to drier snow amid temperatures in
the -10 to -20F range and 30+ kt sustained winds. In fact, blizzard
conditions have been observed at 8 ASOS/AWOS sites across Wyoming,
South Dakota, and Nebraska in the past 2 hours. Expect similar
conditions to spread into northern Colorado this evening.
..Bentley.. 12/21/2022
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GID...LBF...UNR...GLD...BOU...CYS...RIW...GJT...
LAT...LON 39940552 40920819 41661003 41721084 41731082 41991101
43050985 43730312 42900024 40820012 39990086 39960552
39940552
