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weather NWS severe Boone, IL June 11, 2026 at 10:52 PM

Flash Flood Warning issued June 11 at 5:52PM CDT until June 11 at 9:15PM CDT by NWS Chicago IL

FFWLOT The National Weather Service in Chicago has issued a * Flash Flood Warning for... Boone County in north central Illinois... * Until 915 PM CDT. * At 552 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Up to 1 inch of rain has

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