MACON, Georgia (41NBC/WMGT) – Thursday through early Friday morning brings increased coverage of showers and storms, as well as the potential for localized heavy rainfall and flash flooding. Localized swaths of heavy rainfall are difficult for models to pin down, so it is tough to say where exactly this may occur. A few models have zeroed in on the I-85 corridor as a favored area for the heaviest rainfall. The axis of an upper-level trough posit…