(8:30PM - 1/28/20) A weakening storm system moving through the region will bring the chance for wintry precipitation to portions of the state, tonight through Wednesday evening.
No significant changes with this update, but did trim back on the areal extent of minor snowfall accumulations, given trends in model guidance and real-time observations.
A storm system is expected to continue to move from the Southern Plains and into the Southern Mississippi Valley, tonight into Wednesday. This storm system has been on a weakening trend with time, but will still bring a period of light precipitation to portions of the state tonight through Wednesday evening. An area of precipitation will first enter Southern Illinois later tonight, in the form of a mix. Snow will be the predominant precipitation type in the vicinity of the I-64 corridor, with a mix south of there, to mostly rain down near Paducah. This period of precipitation will continue into Wednesday evening across Southern Illinois, before ending from west to east. Minor snowfall accumulation of a dusting to 1.5" will be likely across portions of Southern Illinois.
A period of flurries or light snow showers may be possible across portions of Central Illinois as well, however little to no accumulation is expected. Dry air and a weakening disturbance will prevent anything of note.
Below is the TAM snowfall forecast for this event.
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