EFU Tornado — Cass, Iowa

2024-06-28 · near Marne, Cass, Iowa

0.9 mi

Path length

40 yds

Path width

Event narrative

This tornado was observed by storm chasers and remained in rural cropland. No damage indicators were impacted, hence the EFU rating.

Wider weather episode

A cold front moved across the area on the evening of June 28th. Convection developed quickly along the front as the cap eroded, initially discrete but quickly growing upscale. Robust CAPE exceeding 3000 J/kg was in place with good directional shear to support rotating updrafts. This resulted in a handful of weak tornadoes in Cass county at the onset of storm development. After storms grew upscale they remained sub-severe.

View location on OpenStreetMap → (41.4176, -95.1481)

Source: NOAA Storm Events Database, event_id 1190985. Narrative written by the NWS forecast office that issued the report.