(11:45AM – Friday, February 14th, 2025) Friday morning update on TWO PART storm system will impact the state, from this afternoon through Sunday midday. PART 1 will bring mixed precipitation to Northern and Central Illinois from this afternoon through Saturday morning, including accumulating snow. PART 2 will bring some wintry impacts to the state from Saturday morning through Sunday midday, including the potential for accumulating snow.
…PART ONE…
Timing…
•Friday Afternoon – Saturday morning, February 14-15th.
Location…
•Northern & Central Illinois.
Impacts…
•Snow accumulation ranging from a trace to 1-3″ will be likely across all of Northern and portions of Central Illinois, with locally higher amounts possible near the IL/WI border and Northeastern Illinois. Some of this accumulation across portions of Northern and Central Illinois may be in the form of sleet/pellets.
•Freezing rain/ice accumulation of a glaze will be likely across portions of Northern and Central Illinois.
•Snow/sleet/pellet/ice accumulation may lead to travel issues for some areas.
Discussion…
•As a lead wave moves through the area and warm air advection occurs, an area of precipitation will traverse Northern and portions of Central Illinois. Mixed precipitation will be likely across these areas. Snowfall totals ranging from a dusting to 1-3″ will be likely across Northern and portions of Central Illinois, with locally higher amounts possible near the IL/WI border and across Northeastern Illinois. A burst of moderate to heavy snow will be possible across portions of Northern Illinois. Some sleet/pellet accumulation will be possible as well. A glaze of ice accumulation will also be possible across portions of Northern and Central Illinois.
…PART TWO…
Timing…
•Saturday Morning – Sunday Midday, February 15-16th.
Location…
•Much Of Illinois.
Impacts…
•Widespread snowfall accumulation ranging from a dusting to 1-3″ will be possible across the state. Snowfall placement and amounts may need to be revised as weather guidance eventually comes to full agreement on a solution.
•Snow/sleet/pellet/ice accumulation may lead to travel issues for some areas.
Discussion…
•As the main developing and strengthening storm system tracks through the region over the weekend, precipitation will traverse the state, with some snow and mixed precipitation likely across the state from Saturday morning through Sunday midday. While there continues to be disagreement within weather guidance, there has been a slowly growing consensus towards a solution. Confidence remains on the lower side at this time, but chances are increasing for very minor snowfall accumulation across the state, with an embedded corridor of slightly higher totals possible. Snowfall placement and accumulation amounts will be revised in future updates.
