* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Southeastern Duval County in northeastern Florida... North Central St. Johns County in northeastern Florida... * WHEN...Until 815 AM EDT. * IMPACTS...Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations is imminent or occurring. Streams continue to rise due to excess runoff from heavy rainfall over the last 12 hours. Expect many areas of slow moving or standing water. It will take several hours for all the water from these storms to work through local drainage systems in urban areas. * ADDITIONAL DETAILS... - At 519 AM EDT, Doppler radar indicated heavy rain due to thunderstorms. Flooding is ongoing or expected to begin shortly in the warned area. Between 3 and 7 inches of rain have fallen. - Additional rainfall amounts up to 2 inches are possible in the warned area. - Some locations that will experience flooding include... Jacksonville, Unf, Arlington, Ponte Vedra Beach, Jacksonville Beach, Atlantic Beach, Neptune Beach, Baymeadows and Craig Field. - http://www.weather.gov/safety/flood