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Flood Advisory — Boone, IL; McHenry, IL

Structured official-source report · Published Sep 20, 12:14 PM UTC · Updated Sep 20, 9:30 AM UTC
INFO · active

Latest status

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Boone County in north central Illinois... Winnebago County in north central Illinois... McHenry County in northeastern Illinois... * WHEN...Until 800 AM CDT. * 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... - At 428 AM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Up to 1 inch of rain has fallen. - Additional rainfall amounts of 1 to 2 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Rockford, Crystal Lake, Algonquin, Lake in the Hills, McHenry, Belvidere, Woodstock, Huntley, Loves Park, Machesney Park, Roscoe, Fox Lake, Harvard, Island Lake, South Beloit, Rockton, Marengo, Poplar Grove, Rockford Airport, Cary, Johnsburg, Lakemoor, Spring Grove and Candlewick Lake. - http://www.weather.gov/safety/flood A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

Where it happened

Boone, IL; McHenry, IL; Winnebago, IL · 42.390°, -88.917°

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Latest reported details

official severity
Minor
urgency
Expected
certainty
Likely
event
Flood Advisory
areas
Boone, IL; McHenry, IL; Winnebago, IL

Missing values are unconfirmed, not zero. Magnitude and alert classifications do not establish casualty totals.

What officials are saying

Read the original reports below for instructions and the latest authoritative assessment. StormScapes does not independently confirm damage or issue evacuation orders.

What happens next

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Incident timeline

Sep 20, 9:30 AM UTC · nws

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Boone County in north central Illinois... Winnebago County in north central Illinois... McHenry County in northeastern Illinois... * WHEN...Until 800 AM CDT. * 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... - At 428 AM CDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Up to 1 inch of rain has fallen. - Additional rainfall amounts of 1 to 2 inches are expected over the area. This additional rain will result in minor flooding. - Some locations that will experience flooding include... Rockford, Crystal Lake, Algonquin, Lake in the Hills, McHenry, Belvidere, Woodstock, Huntley, Loves Park, Machesney Park, Roscoe, Fox Lake, Harvard, Island Lake, South Beloit, Rockton, Marengo, Poplar Grove, Rockford Airport, Cary, Johnsburg, Lakemoor, Spring Grove and Candlewick Lake. - http://www.weather.gov/safety/flood A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

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