EXCESSIVE RAINFALL DISCUSSION NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD 908 AM EDT MON APR 18 2011 ...VALID 15Z MON APR 18 2011 - 12Z TUE APR 19 2011... ...REFERENCE AWIPS GRAPHIC UNDER...DAY 1 EXCESSIVE RAINFALL... NO ORGANIZED AREAS OF RAINFALL EXCEEDING FLASH FLOOD GUIDANCE ARE EXPECTED. PETERSEN $$