Administrators NorthGeorgiaWX Posted December 25, 2023 Administrators Share Posted December 25, 2023 MD 2346 CONCERNING HEAVY SNOW FOR PORTIONS OF SOUTH-CENTRAL NORTH DAKOTA...CENTRAL AND EASTERN SOUTH DAKOTA...AND NORTH CENTRAL NEBRASKA Mesoscale Discussion 2346 NWS Storm Prediction Center Norman OK 0331 PM CST Mon Dec 25 2023 Areas affected...Portions of South-Central North Dakota...central and eastern South Dakota...and North Central Nebraska Concerning...Heavy snow Valid 252131Z - 260130Z SUMMARY...Moderate to heavy snow possible this evening, with blizzard conditions at times from south-central North Dakota southward into central South Dakota and north-central Nebraska. DISCUSSION...A deep surface low located across western Iowa has begun to occlude this afternoon while bringing warm and moist air across Iowa and Minnesota into the Dakotas. Aloft, a mid-level low is stacked back to the southwest with very cold air being funneled in by strong northwesterly flow across the High Plains into the Central Plains. Areas of moderate to heavy snow have been ongoing across eastern Nebraska and eastern South Dakota, with a transition to accumulating ice/freezing rain to the northeast. Due to the strength of the surface low, background flow has increased with the strong mass response with surface winds sustained at 25-30 mph gusting as high as 40-50 mph. Blizzard conditions have been observed across central South Dakota with visibility around 1/4 mi and sustained winds at 20-30 mph gusting up to 50 mph. As the surface low shifts back westward through the evening, strengthening mid-level flow around 40-50 kts will overspread portions of the Dakotas into western Nebraska. Warm air overspreading eastern North Dakota into northeastern South Dakota will lead to a transition from snow to freezing rain with potential for ice accumulations. The increased upper-level support across the Dakotas into far northern Nebraska will aid in formation of snow bands capable of 1"+/hr rates along with potential for blowing snow and reduced visibility below 1/4 mi with continued strong surface winds. These conditions will continue to spread westward as the low shifts west through the late evening and overnight. ..Thornton/Hart.. 12/25/2023 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...FGF...FSD...ABR...BIS...LBF...UNR... LAT...LON 42480106 43430210 43880217 44520205 45310195 45890125 46919946 47049925 47499717 46689638 46029630 44159761 43679792 43159838 42649882 42239942 42209951 42160028 42480106 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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