A little off-topic, but while the ORD/Southern MI crew sorts out the thermodynamics for "Winter Storm Jacob" (lol), it's almost a lock that from Friday afternoon through daybreak on Saturday an area through STL, HUF, IND, FWA, and TOL will see the proverbial kitchen sink of precipitation before turning to all rain. However, on the map shown below from TT, their algorithm shows an unbelievable amount of snow in the highlighted area. I realize that it includes sleet and it is caused by taint. I wish Tropical Tidbits would change this. My problem is the social media cowboys who will post this map as a forecast for pure sensationalism. Then it's up to someone in my position to talk to the public and government officials off of the ledge.
On a side note, it looks like for the FWA area, it will start as snow shortly after dark (when else?), and we may be able get a quick inch or two before the kitchen sink sets in until daylight.