Waterspout — Northerly Island To Calumet Harbor Il, Lake Michigan

2011-09-24 · near Burnham Harbor, Northerly Island To Calumet Harbor Il, Lake Michigan

Event narrative

A waterspout was reported 3 to 4 miles east from the shore near 47th Street.

Wider weather episode

Atmospheric conditions became favorable for non-thunderstorm waterspouts during the early morning hours of September 24th, as very cold air aloft interacted with a convergence boundary along the Illinois shore of Lake Michigan. Several waterspouts were spotted during the morning hours after sunrise.

View location on OpenStreetMap → (41.8114, -87.5166)

Source: NOAA Storm Events Database, event_id 347276. Narrative written by the NWS forecast office that issued the report.