Welcome to Indianapolis' snowiest "day" since the Blizzard of 1978. At 9 pm the NWS office on the southwest side reported just over 11″ and many areas along and north of the I-70 corridor are in double-digit accumulation.
The Winter Storm Warning continues until 1am (which then becomes a Wind Chill Warning) and a Blizzard Warning is in effect in north-central Indiana until 7am.
With or without a "blizzard" warning, the entire are will experience white-out to near blizzard conditions tonight.
Temperatures will be below zero by midnight and bottom around -15 by 7am Monday. Wind chills at that time will be in the -30 to -50 range… dangerously cold to exposed skin.
It takes less than 10 minutes for frostbite to occur at those conditions. Temperatures will be below zero for some 48 hours and wind chills in the danger range until Wednesday morning.
The bitter air eases later in the week, but a new threat of snow arrives late Wednesday into Thursday.