開始于: 2026-09-19, 04:00
到: 2026-09-19, 06:00

* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of Illinois, including the following areas, Central Cook, De Kalb, DuPage, Kane, Kendall, Lake IL, Lee, Northern Cook, Northern Will and Southern Cook and northwest Indiana, including the following areas, Lake IN and Porter. * WHEN...From 4 AM CDT Saturday through Saturday afternoon. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms late tonight through Saturday morning may produce widespread rainfall rates up to 2 inches per hour that could lead to flash flooding, particularly over urban areas. Additional thunderstorms Saturday evening into early Sunday morning have the potential to produce torrential rainfall that results in flash flooding, though the exact placement of this rainfall remains unclear. A second Flood Watch for flash flooding may be needed during this period. - http://www.weather.gov/safety/flood

開始于: 2026-09-18, 22:00
到: 2026-09-19, 06:00

* WHAT...High wave action and dangerous currents expected at Lake Michigan beaches. Waves 3 to 6 ft expected. * WHERE...Northern Cook and Central Cook Counties. * WHEN...Through Saturday afternoon. * IMPACTS...Swimming conditions will be life threatening, especially for inexperienced swimmers.