...The National Weather Service in Chicago has issued a Flood Watch for the following rivers in Illinois... Des Plaines River near Russell affecting Lake IL County. Des Plaines River near Gurnee affecting Lake IL County. Des Plaines River at Lincolnshire affecting Cook and Lake IL County. Des Plaines River near Des Plaines affecting Cook County. Des Plaines River at Riverside affecting Cook County. .The combination of heavy rain this morning and expected additional thunderstorms with heavy rain tonight may lead to river flooding along the Des Plaines River basin as early as Sunday morning. The heavy rain tonight is expected to occur along a roughly west to east axis across northern Illinois, though the exact location across the river basin remains uncertain. Flooding severity may be higher or lower over the basin depending on the ultimate placement of the highest rainfall tonight. * WHAT...Flooding is possible. * WHERE...Des Plaines River from US-41 in Gurnee downstream to Townline Road in Vernon Hills, including the Gurnee gauge. * WHEN...From Sunday morning until further notice. * ADDITIONAL DETAILS... - At 8:30 AM CDT Saturday the stage was 3.7 feet. - Forecast...Flood stage may be reached late Sunday morning. - Flood stage is 7.0 feet. - http://www.weather.gov/safety/flood A Flood Watch means water levels above flood stage are possible, but not yet certain, based upon the latest forecasts. Persons along rivers and streams in the watch area should monitor the latest forecasts and be prepared to take action should flooding develop. These forecasts are based on observed precipitation as well as forecast precipitation 24 hours into the future. Changes to the rainfall forecast, or any additional rainfall after 24 hours, may cause changes to these river forecasts. Additional information is available at www.weather.gov. The next statement will be issued by late tonight.