...1882... An unusual late season snow blanketed eastern Iowa, with four to six inches reported around Washington.
...1924... The low temperature at Newport, Rhode Island fell to 42 degrees, later tied in 1935.
...1941... At Newport, Rhode Island the heat index peaked at 89 degrees, setting the high for the date.
...1953... The temperature at Hollis OK soared from a morning low of 70 degrees to an afternoon high of 110 degrees to establish a state record for the month of May.
...1979... 2.33 inches of rain fell at Newport, Rhode Island, breaking the record of .94 inches set in 1940.
...1987... It was a busy day for thunderstorms in the central U.S. Thunderstorms produced wind gusts to 65 mph at Shreveport LA and golf ball size hail at Marfa TX. Hobart OK received 3.55 inches of rain in the morning, and another 4.03 inches of rain that evening. Thunderstorms in Nebraska produced 8.5 inches of rain in two hours north of Potter, and 7.5 inches of rain in ninety minutes north of Minatare. Thunderstorms in Colorado produced five inches of hail at Greeley.
...1988... Thunderstorms produced severe weather across much of the eastern U.S. Golf ball size hail was reported in Georgia, Maryland, North Carolina, South Carolina and Ohio.
...1989... Severe thunderstorms developing along a cold front resulted in 98 reports of large hail and damaging winds in the Northern Plains and Upper Mississippi Valley. Golf ball size hail caused a million dollars damage around Buffalo City WI, baseball size hail was reported at Northfield MN and Randolph MN, and thunderstorm winds gusted to 95 mph at Dunkerton IA.
Unseasonably hot weather continued in the south central U.S. Pueblo CO equaled their May record with a high of 98 degrees, and the high of 106 degrees at Midland TX marked a record six straight days of 100 degree heat.
...1990... A cold front crossing the western U.S. produced snow over parts of Oregon, California, Nevada, Idaho and Utah, with five inches reported at Austin NV, and four inches at Crater Lake National Park in Oregon. Strong winds behind the cold front sharply reduced visibilities in blowing dust over central California, and two multi-vehicle accidents resulted in one death and eighteen injuries. In northern Idaho, a cloud-burst washed tons of topsoil, and rocks as large as footballs, into the valley town of Culdesac.
...1991... Thunderstorms in the Denver, Colorado Metro Area produced large hail up to golf ball size. An estimated 5000 homes and 8000 cars received considerable damage. Hail accumulated to a depth of 6 inches in Aurora.
...1992... The mercury rose of 90 degrees at Newport, Rhode Island, breaking the record of 88 degrees that was set back in 1941.
...1994... Two records were broken on this day at Newport, Rhode Island. .99 inches of rain fell in one hour, breaking the record of .59 inches set in 1979 and the wind gusted to 42 miles per hour, breaking that record of 38 miles per hour which was held in 1984.
An outbreak of over 80 tornadoes hit northwest Oklahoma, western Kansas, eastern Colorado, and southeastern Wyoming. 2 deaths occurred in Pratt County, Kansas. Of particular interest is that 55 tornadoes occurred in the Dodge City, Kansas WFO County Warning Area alone!