18" of Snow?

Here is a little tidbit of information from a forecaster in northern Indiana National Weather Service office in North Webster. "...stretch of 12-18" from the raw NAM from STL to IND to LIMA,OH to near TOL and DET. Lima OH gets 18" per the raw data. Use with a large grain of salt! But interesting none the less." I took the liberty and drew a map. As he said, interesting stuff.