Thunderstorm Wind — Jackson, Illinois
2025-05-20 · near Grand Tower, Jackson, Illinois
$15K
Property damage
61 EG
Magnitude
Event narrative
Multiple power poles were broken on Grand Tower Rd.
Wider weather episode
A squall line pushed eastward overnight across the warm sector of a low pressure system in Iowa. A surging portion of the line produced wind damage in portions of Southern Illinois, including the formation of a brief tornado in eastern Union County. MLCAPE was around 1000-1500J/kg, effective bulk shear was 40-50kts, and 0-3km SRH was 200-300m2/s2, with dewpoints in the mid to upper 60s.
View location on OpenStreetMap → (37.6274, -89.4916)
Source: NOAA Storm Events Database, event_id 1272590. Narrative written by the NWS forecast office that issued the report.