Severe Storm Outlook Narrative (AC)
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939
ACUS11 KWNS 052256
SWOMCD
SPC MCD 052255
MNZ000-NDZ000-060500-

MESOSCALE DISCUSSION 1868
NWS STORM PREDICTION CENTER NORMAN OK
0455 PM CST MON DEC 05 2016

AREAS AFFECTED...PORTIONS OF EASTERN NORTH DAKOTA AND NORTHWESTERN
MINNESOTA

CONCERNING...HEAVY SNOW

VALID 052255Z - 060500Z

SUMMARY...HEAVY SNOW...WITH RATES AROUND 1 INCH PER HOUR...WILL SPREAD
NORTHEASTWARD ACROSS EASTERN ND AND NORTHWESTERN MN THROUGH 05Z.

DISCUSSION...RADAR AND SURFACE OBSERVATIONS AS OF 2245Z INDICATE A
BAND OF MODERATE TO HEAVY SNOW ONGOING ACROSS SOUTH-CENTRAL ND
WITHIN A DEVELOPING DEFORMATION ZONE. THIS SNOW BAND WAS OCCURRING
IN ASSOCIATION WITH AN UPPER TROUGH OVER THE WESTERN DAKOTAS AND
EASTERN MT. THE STRONGEST FORCING FOR ASCENT/ISENTROPIC LIFT
ATTENDANT TO THE UPPER TROUGH WILL SHIFT NORTHEASTWARD INTO EASTERN
ND AND NORTHWESTERN MN THROUGH 05Z AS A SURFACE LOW ACROSS
NORTHEASTERN SD LIKEWISE DEVELOPS NORTHEASTWARD WHILE DEEPENING.
HEAVY SNOW WILL MOVE/DEVELOP ACROSS THE MESOSCALE DISCUSSION AREA
OVER THE NEXT SEVERAL HOURS. GIVEN STRONG DYNAMIC COOLING AND LIFT
ASSOCIATED WITH THE UPPER TROUGH OCCURRING THROUGH THE DEPTH OF THE
DENDRITIC GROWTH ZONE...SNOWFALL RATES AROUND 1 INCH PER HOUR APPEAR
PROBABLE...WITH LOCALLY HIGHER RATES POSSIBLE.

..GLEASON.. 12/05/2016

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...FGF...BIS...

LAT...LON   46170022 47640027 48529928 49039823 49049531 49479522
            49419467 48659450 47459464 47119563 46829675 46469761
            46079817 45989978 46170022




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