...1939... A thunderstorm deluged Washington D.C. with 4.4 inches of rain in two hours. September of that year was very dry across much of the nation, and Washington D.C. received more rain in that two hour period than most other places in the country that entire month.
...1941... A F2 tornado tracked 30 miles across Hennepin, Ramsey, and Washington Counties in Minnesota directly traveling across Minneapolis. 4 people were killed, 50 were injured, and $425,000 in damages was done.
...1970... The greatest natural disaster of record for Arizona occurred. Unprecedented rains caused rivers in central Arizona to rise five to ten feet per hour, sweeping cars and buildings as far as 30 to 40 miles downstream. Flooding claimed the lives of 23 persons, mainly campers, and caused millions of dollars damage. Water crested 36 feet above normal near Sunflower AZ. Workman's Creek was deluged with 11.40 inches of rain in 24 hours to establish a state record. Moisture from Pacific Tropical Storm Norma led to the severe flooding. (4th-6th)
...1986... An unusually strong dust devil moved across the Flagstaff Pulliam Airport. The dust devil blew open the doors of the National Weather Service office scattering papers and bringing down a ceiling-mounted light fixture.
...1987... Thunderstorms developing along a stationary front produced heavy rain across the Southern Atlantic Coast States. Up to eight inches was reported north of Charleston SC. Serious flooding was reported in Monks Corner SC. Seven cities in the northeastern U.S. reported record low temperatures for the date. Houlton ME dipped to 32 degrees.
...1988... The western U.S. experienced another day of record heat. The afternoon high of 91 degrees at Stampede Pass WA established an all-time record for that location, and Los Angeles CA equaled their all-time record high with a reading of 110 degrees. A record high of 107 degrees at San Diego CA was their hottest reading in 25 years. Red Bluff CA was the hot spot in the nation with an afternoon reading of 118 degrees.
...1989... Overnight thunderstorm rains of four and a half to seven inches drenched eastern Nebraska during the morning hours, pushing creeks out of their banks, and flooding fields, country roads and city streets. Totals ranged up to 6.97 inches south of Creston. It was also a soggy Labor Day for northern Florida. Jacksonville reported 6.82 inches of rain, and evening thunderstorms produced 2.75 inches of rain in one hour at Sandlewood.
...2000... Houston, Texas and College Station, Texas both recorded their hottest temperatures on record with 109 and 112 degrees, respectively.
...2007... Marquette, Michigan was drenched with 4.29 inches of rain on this day for it greatest daily rainfall on record.