South Dakota Mesoscale Discussion

Areas affected…Southeast WY…Nebraska Panhandle…Southwest South
Dakota

Concerning…Heavy snow

Valid 300449Z – 300845Z

SUMMARY…Heavy snow, with rates of 1-2″ per hour, will
develop/spread northeast across the central High Plains into the
early morning hours.

DISCUSSION…Exit region of strong mid-level jet is spreading across
the central High Plains this evening. Latest water-vapor imagery
depicts a well-defined zone of apparent large-scale forcing for
ascent expanding across WY/Nebraska Panhandle into southwest South
Dakota. Radar data supports this evolution with a maturing band of
convective snow from Weld County, CO to Sioux County, NE. Strong
low-level warm advection will contribute to strengthening snow bands
developing into SD over the next few hours. It appears very heavy
snow, with rates approaching 2″ per hour, will be noted over the
next several hours.

..Darrow.. 11/30/2019

…Please see www.spc.noaa.gov for graphic product…

ATTN…WFO…LBF…UNR…CYS…

LAT…LON 41010451 42390445 43400278 43180172 42440176 41310289
41010451

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