5:37p Update – Hydrological Report: Today’s rainfall combined with surface runoff from the recent snowmelt has led to a rise in area rivers and streams. Flood advisories and warnings are in effect for several counties across northern Illinois, northwest Indiana, and southeastern Wisconsin.
Flood Advisory counties: Lake(IN) and Newton
Flood Warning counties: Lake(IL), Kenosha, and La Salle
Earlier this morning, there were reports of sleet and freezing rain. The transition from wintry precipitation to rain took place during the mid morning hours as temperatures rapidly climbed above the freezing mark. All area advisories and warnings have been canceled as a result. The transition of precipitation and rise in temperatures were due to a northward moving warm front. That warm front has moved north of the Chicago area. For the rest of the day, any precipitation will fall in the form of rain/drizzle as the area will remain in the warm sector of this winter storm. A deepening area of low pressure will track across northern Illinois and Indiana this afternoon. There is the possibility of a tunderstorm or two this afternoon across the area.
Overnight tonight, temperatures will begin to drop as the area will be on the backside (usually the cold side) of the system. The threat for freezing rain/drizzle exist overnight. This will set the stage for potentially dangerous driving conditions overnight and Monday morning even with the slightest accumulations. From north to south, freezing rain/drizzle will transition to snow over the Chicagoland area Monday. Snowfall accumulation is still on track with as much as 2 inches falling by Monday evening.
Storm system #2 Wednesday night – Friday
A break in the weather will come Tuesday with mostly sunny skies and highs struggling to make it out of the 20s. Most of Wednesday will be dry; however, there is the chance for rain late Wednesday night as storm system #2 approaches. This second storm system has enough cool air that will bring mostly wintry weather to the region. This one is still being monitored carefully as a shift in the storms track could change this scenario.
Related Article: Wave of storms to impact region over next 7 days with rain and accumulating snow/ice
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