Flood Advisory issued June 11 at 9:06PM CDT until June 12 at 3:00AM CDT by NWS Chicago IL
Issue date: 2026-06-12T02:06+00:00
* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Portions of north central and northeast Illinois, including the following counties, in north central Illinois, Boone, De Kalb, Lee, Ogle and Winnebago. In northeast Illinois, Lake IL and McHenry. * WHEN...Until 300 AM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 902 PM CDT, Doppler radar indicated that heavy rainfall has ended. Runoff from the 2, to locally 3, inches of rain that fell across the advisory area will continue to lead to minor flooding through the remainder of the evening. Conditions will improve overnight. - Flooding impacts will continue, but no additional rainfall is expected. - Some locations that will experience flooding include... Rockford, Waukegan, Crystal Lake, Gurnee, Round Lake Beach, McHenry, Belvidere, Woodstock, Zion, Loves Park, Machesney Park, Grayslake, Libertyville, Round Lake, Dixon, Antioch, Wauconda, Roscoe, Fox Lake and Harvard. - http://www.weather.gov/safety/flood
Flood Watch issued June 11 at 12:39PM CDT until June 11 at 11:00PM CDT by NWS Chicago IL
Issue date: 2026-06-11T17:39+00:00
* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of Illinois, including the following areas, Boone, Central Cook, De Kalb, DuPage, Eastern Will, Grundy, Kane, Kankakee, Kendall, La Salle, Lake IL, Lee, Livingston, McHenry, Northern Cook, Northern Will, Ogle, Southern Cook, Southern Will and Winnebago and northwest Indiana, including the following areas, Lake IN and Porter. * WHEN...Until 11 PM CDT this evening. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Underpasses may be flooded. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Multiple rounds of heavy showers and thunderstorms are possible this afternoon and evening, with rain rates up to 1 to 3 inches per hour. The most likely areas for flooding include urban areas and locations and received heavy rainfall over the last few days. - http://www.weather.gov/safety/flood
