A strengthening spring storm system will approach the state Tuesday afternoon and evening bringing multiple rounds of thunderstorms.
UPDATE: The Tornado watch has been extended until 1 AM for a portion of central, south-central and east Indiana.
A warm front early in the day was the focus for very heavy rainfall - over 3" in Indianapolis. A new record for the date and the month of April has already been established. Many flash flood warnings have been issued and will remain in effect into early this afternoon.
A large temperature spread fuels a strong jet stream that brings moist and very unstable air into the state. The threat for storms to increase and become severe is very high this afternoon and evening.
There may be several locations and wide-spread strong to severe storms until a cold front sweeps the state later tonight.
Here is the breakdown, timing and location of the severe threat Tuesday. Have your severe weather plans in place and review with your family as to what to do should a tornado threaten
UPDATE 5:30 PM
Storms have departed into Ohio out of southeast Indiana while a warm front stalls through the state. Storms are possible and may fire up along the warm front along and north of I-70 but the main storm threat will come later this evening. A skinny line of storms ahead of a cold front will sweep the state from west to east over the next few hours. This line may be the 'main event' now with damaging winds, some hail and the threat of a few embedded tornadoes.