42°4'N / 87°58'W / Wysokość 209 m / 02:00 20.09.2026, America/Chicago (UTC-5)
Od: 19.09.2026, 20:23
Do: 20.09.2026, 04:30
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Boone, Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee, McHenry, Northern Cook, Northern Will, Ogle, Southern Cook and Winnebago and northwest Indiana, including the following areas, Lake IN and Porter. * WHEN...Until 7 AM CDT Sunday. * 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... - Another round of showers and thunderstorms is expected late this evening and overnight. Swaths of heavy to very heavy rainfall with 2+ inch per hour rainfall rates are likely to occur within the watch area and may result in areas of flash flooding and cause rapid rises on area rivers, creeks, and streams. - http://www.weather.gov/safety/flood
Cook,Northern Cook
A Flood Watch for flash flooding means rapid-onset flooding is
possible, but not yet certain, based upon the latest forecasts. Flash
flooding is a dangerous situation. Persons with interests along area
rivers, creeks, and other waterways should monitor the latest
forecasts and be prepared to take action should flooding develop.
NWS Chicago IL
19.09.2026, 20:23
Od: 19.09.2026, 22:06
Do: 20.09.2026, 06:15
* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 7 to 10 ft expected. * WHERE...Lake IL, Northern Cook, and Central Cook Counties. * WHEN...From 7 AM CDT Sunday through Tuesday evening. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers.
Cook,Northern CookRemain out of the water to avoid dangerous swimming conditions
and do not venture out onto piers, jetties, breakwalls, or other
shoreline structures.NWS Chicago IL19.09.2026, 22:06