All the ingredients to the potential for widespread moderate to
heavy rain and isolated severe thunderstorms on Friday as a cold
front slides southeast across central Indiana Friday and Friday
evening courtesy of an approaching sharp upper trough and surface
high pressure over the Rockies and High Plains.
Modest to moderate low level 35 knot jet pointing in from western
Kentucky will bring in precipitable water amounts to the 99th
percentile for this time of year. This will combine with strong deep
layer shear of over 50 knots and low level shear near 50 knots to
support the potential of isolated damaging winds despite only weak
instability. 115 plus knot upper level jet streak lifting northeast
around the base of the trough over northwestern Indiana or
northeastern Illinois late Friday supports moderate to heavy rain.
Thus, 90 plus percent PoPs look good for Friday with rain moving
east into Ohio overnight Friday night and Saturday morning. Look for
rainfall of half an inch to over an inch over most or all locations
Friday and Friday night.