Flash Flood — Bartholomew, Indiana

2021-07-29 · near Old St Louis, Bartholomew, Indiana

$20K

Property damage

Event narrative

Indiana State Route 9 is impassable or washed out from the Shelby County line to Hope town square. At least one water rescue was performed.

Wider weather episode

A very warm and humid air mass combined with a slowly-approaching west-to-east cold front to initiate scattered evening thunderstorms. Severe weather occurred in the most favorable environment, to the southeast of Indianapolis, wherein 3000-4000 MLCAPE, 125-175 0-3 km MLCAPE, and 100-200 effective storm relative helicity combined to form an intense, nearly-stationary QLCS. Two EF-1 tornadoes, spawned from the QLCS, occurred within a small area where 50-100 0-1 km storm relative helicity overlapped with 100 mb LCL values under 750 meters. The event's maximum precipitable water axis of 2.0-2.1 inches, west to east across southern Indiana, coincided with the 2-7 inch rainfall reports under the QLCS.

View location on OpenStreetMap → (39.3500, -85.7746)

Source: NOAA Storm Events Database, event_id 964036. Narrative written by the NWS forecast office that issued the report.