Flood Watch: Adams; Brown; Knox; Lewis; Shelby; Marion

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Flood Watch — Adams; Brown; Knox; Lewis; Shelby; Marion Severity: Severe. Certainty: Possible. * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of west central Illinois, including the following areas, Adams IL and Brown IL and northeast Missouri, including the following areas, Knox MO, Lewis MO, Marion MO and Shelby MO. * WHEN...From 1 AM CDT Saturday through Saturday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Thunderstorms producing heavy rainfall moving over the same areas will likely produce flash flooding.