(11:45AM – Tuesday, February 11th, 2025) Tuesday morning update on a winter storm that will impact the state from tonight through Thursday morning, bringing impactful winter weather to the state, headlined by the likelihood of several inches of snow across a large portion of the state.
Timing…
•Tonight – Thursday morning, February 11-13th.
Location…
•Much of Illinois.
Impacts…
•Snow accumulation ranging from 2-5″ to 4-7″ will be likely across much of Northern and portions of Central Illinois, with locally higher amounts possible. A gradient in snowfall totals, with a steady drop-off, will be in the vicinity of I-72 and I-70 in Central Illinois.
•Freezing rain/ice accumulation of <0.10″ will be likely across portions of Central and Southern Illinois, with locally higher amounts possible.
•While high winds are not expected, wind gusts of 15-30MPH will still lead to some blowing and drifting of snow, especially in open/rural areas.
•Moderate to heavy snowfall rates will be possible at times across portions of Northern and Central Illinois.
Update…
With this forecast update, adjustments have been made to snowfall totals and placement across the state. These changes were made based on changes in weather model guidance data over the past 24 hours and based on changes in confidence regarding evolution of the setup.
Discussion…
•As a storm system moves through the region, precipitation will spread across the state from Tuesday night through Thursday morning.
•Across Northern and portions of Central Illinois, snow will be favored for the duration of this winter storm. While broad snowfall accumulation of a couple of several inches will be possible, a corridor of higher snowfall accumulation will be possible. Additionally, a gradient in snowfall amounts will be likely on the southern end of the main snowfall axis. This gradient will set-up int he vicinity of I-72 and I-70 in Central Illinois. Sleet/pellets will be possible along this gradient area as well.
•Across other portions of Central and Southern Illinois, a corridor of freezing rain will be possible, with precipitation mostly expected to be rain across far Southern Illinois.
