Springfield, IL  (CAPITOL CITY NOW) – Expect sub-freezing temperatures as low as 30 degrees early Wednesday morning.  The National Weather Service freeze warning is in effect from 1 a.m. to 8 a.m. Wednesday for portions of central and west central Illinois, generally along and west of a Bloomington to Taylorville line.  Frost and freeze conditions could kill sensitive vegetation and damage unprotected outdoor plumbing. Urban areas may stay a bit warmer, according to the NWS.