These records are based on the historical daily observations archived in NCDC's Cooperative Summary of the Day data set and preliminary reports from Cooperative Observers and First Order National Weather Service stations, and as such are subject to change. The Period of Record (POR) represents the number of years with a minimum of 50% data completeness. All stations have a Period of Record of at least 30 years. When the 6-digit COOP ID does not exist for a station the 5-digit WBAN ID is used. All-Time Precipitation in April 2011 Iowa, Illinois, Indiana, Kentucky, Louisiana, Missouri, Mississippi, Ohio, Tennessee 5 0 5 342,492 WEST PLAINS HOWELL MO 238880 COOP 64 36.74 -91.83 5.50 0.15 2.80 2011-04-24 5.35 1957-04-03 TUNICA 2 N TUNICA MS 228998 COOP 53 34.73 -90.37 7.94 1.14 16.76 2011-04-27 6.80 2001-11-29 ARKABUTLA DAM TATE MS 220237 COOP 71 34.78 -90.12 7.51 0.31 4.31 2011-04-27 7.20 1982-08-14 PLEASANT HILL DESOTO MS 227066 COOP 66 34.92 -89.94 7.07 1.37 24.04 2011-04-27 5.70 1947-06-22 LANCASTER FAIRFIELD OH 334403 COOP 38 39.72 -82.61 3.00 0.02 0.67 2011-04-28 2.98 2004-09-09