Jun 22, 2013
A complex of severe thunderstorms produced a tornado in Columbia County, as well damaging winds over South Central Wisconsin during the evening hours of June 22nd. The complex developed on the nose of a 30 knot low-level jet ahead of a short wave trough impinging on a stationary boundary over northern Illinois that began to lift north as a warm front. Effective shear of 30 knots to sustain updrafts, with mixed layer CAPE values reaching 2000 to 3000 J/kg with steep mid-level lapse rates contribu
Source: NOAA National Weather Service Storm Events Database (event 464979). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Sauk County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.