The next storm system will hit later Monday night through Tuesday with freezing rain and snow, so read on for the full details…
We are in a southwest flow for the week of January 21st with several dynamics expected later Monday night through Tuesday. The current thinking is dense fog will develop later Monday evening across most zones of the forecast area as a warm layer of relative humidity will move overtop the cold snowpack surface. Freezing rain will break out across the southern zones Monday evening working north into central Iowa later in the night due to surface temperatures near 32F and warmer temperatures at 5,000 FT above. As warm air clashes with freezing air, snow will develop for those in the northern zones overnight into Tuesday. This will give an all-snow event for northern Iowa with freezing rain transitioning to snow for central and south zones during the pre-dawn hours of Tuesday. This is a dynamic system which makes this forecast challenging. That said, right now the transition zone is near the highway 30 corridor and points south.
Snow would continue in all zones through Tuesday afternoon before the system slides off to the northeast. I will continue to fine-tune the precipitation type as temperatures will play a huge role in what is falling from the sky but light ice accumulation and light to moderate snow accumulation are likely with the system.
The amounts for snow and ice will be available soon in the final forecast. Stay tuned to Iowa Storm Center.com and all our social handles for the latest updates.
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