Administrators NorthGeorgiaWX Posted January 12 Administrators Posted January 12 MD 0051 CONCERNING HEAVY SNOW FOR NORTHERN IL...SOUTHERN WI...EASTERN IA Mesoscale Discussion 0051 NWS Storm Prediction Center Norman OK 0423 AM CST Fri Jan 12 2024 Areas affected...Northern IL...Southern WI...Eastern IA Concerning...Heavy snow Valid 121023Z - 121430Z SUMMARY...Snow rates of 1+ inch per hour will spread northward this morning. DISCUSSION...At 1015 UTC, a broad region of moderate precipitation is ongoing within the warm conveyor belt of a deepening cyclone currently centered near the Ozark Plateau. Within this region, an area of locally heavier precipitation is noted from eastern IA into northern IL, where some enhancement is likely being provided by a midlevel shortwave trough that is moving across southern IL in advance of the primary shortwave across the central/southern Plains. Some increase in moderate to heavy snow observations has been noted over the last hour across northwest/north-central IL, and this trend is likely to continue as heavier precipitation spreads into northeast IL and southern WI. Favorable moistening and ascent within a deep layer (including the dendritic growth zone) will support snow rates of 1+ inch per hour for at least a few hours this morning. Continued strong low-level warm advection will eventually result in a snow-to-rain transition along the southern periphery of the ongoing precipitation shield, with the rain/snow line expected to gradually advance northward into parts of northern IL later this morning. ..Dean.. 01/12/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...LOT...ILX...MKX...DVN...ARX... LAT...LON 42928774 42298769 41908757 41638752 41418749 41158750 41068777 41168948 41229053 41269132 41499156 42109160 43069064 43208884 42928774 Read more View the full article Quote
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