Administrators NorthGeorgiaWX Posted January 12 Administrators Share Posted January 12 MD 0058 CONCERNING HEAVY SNOW FOR PORTIONS OF NORTHERN/CENTRAL LOWER MICHIGAN AND FAR NORTHEAST WISCONSIN Mesoscale Discussion 0058 NWS Storm Prediction Center Norman OK 0547 PM CST Fri Jan 12 2024 Areas affected...Portions of northern/central Lower Michigan and far northeast Wisconsin Concerning...Heavy snow Valid 122347Z - 130345Z SUMMARY...Heavy snow with rates of 1 to locally 2 in/hr will continue spreading northward across Lower MI and northeast WI this evening. DISCUSSION...A fairly expansive swath of heavy snow with rates near 1 in/hr are ongoing across much of Lower MI this evening, largely driven by a deep band of isentropic ascent ahead of a 984 mb surface cyclone currently over northeast IL. Latest web cams across Lower MI show snow sticking to roadways as surface temperatures continue to nocturnally cool. Over the next few hours, the strong isentropic ascent (50-60-kt 1-2 km cross-isotherm flow per regional VWP) will continue northward in tandem with the northeastward-moving surface cyclone. This will occur as ascent in the left exit region of a robust southwesterly jet streak overspreads the area. The strengthening deep-layer ascent coupled with increasingly cold thermodynamic profiles with northward extent will continue to support heavy snow with rates of 1-2 in/hr given a deep/saturated dendritic growth zone. The best chance for localized 2 in/hr rates could develop across northeastern Lower MI from 00-04Z, where colder temperatures and stronger ascent should overlap for a couple hours (supported by the latest high-resolution guidance). In addition, a modest pressure gradient and related breezy surface winds should continue to favor visibility reductions to 0.25 miles in the heavier bursts of snow. ..Weinman.. 01/12/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...DTX...APX...GRR...MQT...GRB...MKX... LAT...LON 42828544 43098686 43428775 43928809 44788799 45568719 45918639 45978545 45868442 45598376 45088307 44198258 43668248 43008299 42778397 42828544 Read more View the full article Quote Link to comment Share on other sites More sharing options...
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