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ACUS11 KWNS 051653
SWOMCD
SPC MCD 051652=20
NEZ000-KSZ000-COZ000-WYZ000-052045-
Mesoscale Discussion 0034
NWS Storm Prediction Center Norman OK
1052 AM CST Wed Jan 05 2022
Areas affected...portions of far southeast Wyoming...far western Nebraska...extreme northeast Colorado
Concerning...Heavy snow=20
Valid 051652Z - 052045Z
SUMMARY...Heavy snowfall with 1-2 inch/hour rates remain possible
into the early afternoon with a band of heavier snow ongoing across
southeast Wyoming. Some of these heavier rates may reach the Colorado/Nebraska/Kansas border by mid to late afternoon.
DISCUSSION...A 500 mb impulse embedded in broad northwesterly
mid-level flow is now traversing the central Rockies, supporting
surface low intensification across southern WY and associated
deep-layer ascent. 16Z mesoanalysis shows very strong surface-700 mb frontogenesis situated ahead of the surface low across southeast WY
to the KS/CO/NE border vicinity, amid a sub-freezing troposheric
profile depicted by surface observations and 15Z RAP forecast
soundings valid for 16Z. Strong 700 mb warm-air/moisture advection
will continue to pump 70+ percent saturated air into a 1500+ m deep
-12 to -17C dendritic growth layer experiencing intense ascent. As
such, 1-2 inch/hr snowfall rates are likely through the afternoon.
Before deep-layer ascent wanes, some of the heavier snowfall rates
may approach the CO/NE/KS border.
..Squitieri.. 01/05/2022
...Please see
https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!p6sMbeTv_smkkv6PaYmAzikVhwBjJPwVX68EpDeXJxPopsxe1PCsXqzfM2dBPXyJuKYstuNv$=
for graphic product...
ATTN...WFO...LBF...GLD...BOU...CYS...
LAT...LON 42240560 42110401 41480212 40810093 40170046 39950085
40090159 40370250 40680333 40950419 41100474 41300524
41570540 42240560=20
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