* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of southwest Illinois, including the following areas, Monroe IL and Randolph IL and Missouri, including the following areas, Cole MO, Crawford MO, Franklin MO, Gasconade MO, Iron MO, Jefferson MO, Madison MO, Moniteau MO, Osage MO, Reynolds MO, Saint Francois MO, Sainte Genevieve MO and Washington MO. * WHEN...Through this evening. * IMPACTS...Low-water crossings may be flooded. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - Scattered showers and thunderstorms are expected through today with locally heavy rainfall likely to accompany thunderstorms. Thunderstorms will be capable of producing rainfall rates of 1-2" per hour with the strongest cells. Additional totals of 1-3" are possible with locally higher amounts. Areas that have been affected by excessive rainfall in the previous 24-36 hours will be highly susceptible to flash flooding.