This Date in Weather History for July 31,2015 from weatherforyou.com

Weather History
For Friday,July 31,2015

1976 - A stationary thunderstorm produced more than ten inches of rain which funneled into the narrow Thompson River Canyon of northeastern Colorado. A wall of water six to eight feet high wreaked a twenty-five mile path of destruction from Estes Park to Loveland killing 156 persons. The flash flood caught campers, and caused extensive structural and highway damage. Ten miles of U.S. Highway 34 were totally destroyed as the river was twenty feet higher than normal at times. (David Ludlum) (The Weather Channel)

1986 - The temperature at Little Rock, AR, soared to 112 degrees to establish an all-time record high for that location. Morrilton, AR, hit 115 degrees, and daily highs for the month at that location averaged 102 degrees. (The Weather Channel)

1987 - The deadliest tornado in 75 years struck Edmonton, Alberta, killing 26 persons and injuring 200 others. The twister caused more than 75 million dollars damage along its nineteen mile path, leaving 400 families homeless. At the Evergreen Mobile Home Park, up to 200 of the 720 homes were flattened by the tornado. (The National Severe Storms Forecast Center)

1987 - Afternoon highs of 106 degrees at Aberdeen, SD, and 102 degrees at Ottumwa, IA, and Rapid City, SD, established records for the date. It marked the seventh straight day of 100 degree heat for Rapid City. Baltimore, MD, reported a record twenty-two days of 90 degree weather in July. Evening thunderstorms produced golf ball size hail at Lemmon, SD, and wind gusts to 80 mph at Beulah, ND. (The National Weather Summary) (Storm Data)

1988 - Twenty-one cities in the north central U.S. reported record high temperatures for the date, including Sioux City, IA, with a reading of 107 degrees. The reading of 105 degrees at Minneapolis, MN, was their hottest since 1936. Pierre and Chamberlain, SD, with highs of 108 degrees, were just one degree shy of the hot spot in the nation, Palm Springs, CA. (The National Weather Summary)

1989 - Overnight thunderstorms soaked eastern Kansas and western Missouri with heavy rain. Four and a half inches of rain was reported at Nevada, MO. Evening thunderstorms in Oklahoma produced wind gusts to 75 mph at Covington. Six cities in the north central U.S. reported record high temperatures for the date, including Williston, ND, with a reading of 105 degrees. (Storm Data) (The National Weather Summary)