Winter Storm Watches are typically issued for 50% or greater confidence of 6″ of snow in 12 hours or 8″ of snow in 24 hours
— NWS Northern Indiana (@NWSIWX) February 28, 2014

Winter Weather Advisory is usually issued within 24 hours of an event, for snowfall amounts between 2-5″
— NWS Northern Indiana (@NWSIWX) February 28, 2014

For info regarding the weekend storm in surrounding areas, follow @NWSChicago @NWSIndianapolis @NWSLincolnIL @NWSILN @NWSCLE #FF
— NWS Northern Indiana (@NWSIWX) February 28, 2014