DAY 1 EXCESSIVE RAINFALL THREAT AREA NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD 131 AM EDT TUE SEP 16 2008 ...VALID 06Z TUE SEP 16 2008 - 12Z WED SEP 17 2008... RAINFALL IS NOT EXPECTED TO EXCEED FLASH FLOOD GUIDANCE VALUES THIS FORECAST PERIOD.