Thunderstorm Wind — Marion, Missouri

2021-08-12 · near Hannibal, Marion, Missouri

Event narrative

Widespread damaging winds occurred across Hannibal. Numerous large trees, tree limbs and power lines were blown down. One tree was blown down onto an unoccupied camper and another tree was blown down onto an unoccupied car. A hardware store in town sustained moderate roof damage. Also, a large portion of a flat metal roof was removed from a building on the Hannibal-LaGrange University Campus. Several trees and numerous tree limbs were blown down on campus as well.

Wider weather episode

A backbuilding cluster of thunderstorms near the MO/IA border slowly sagged southward during the afternoon hours on August 12th. An additional cluster of thunderstorms congealed across northeastern Kansas into north-central Missouri and merged into the backbuilding cluster. These thunderstorms developed ahead of a synoptic cold front. As these storms moved southeast across the region, some became severe and produced widespread damaging winds.

View location on OpenStreetMap → (39.7409, -91.4332)

Source: NOAA Storm Events Database, event_id 979136. Narrative written by the NWS forecast office that issued the report.