...1917... The same storm which a day earlier produced eight inches of snow in the Texas panhandle, produced a foot of snow at Denver CO, their heaviest snow of record for the month of May.
...1920... The low temperature dipped to 34 degrees at Newport, Rhode Island, breaking the record of 35 degrees set in 1907.
...1930... The temperature at College Park VA soared from 43 degrees to 93 degrees to begin an exceptional heat wave.
...1949... At Newport, Rhode Island the temperature rose to 78 degrees, breaking the previous record of 76 degrees set back in 1919.
...1966... A wind gust of 46 miles per hour was recorded at Newport, Rhode Island on this day, breaking the previous record set in 1956.
...1981... Mobile, Alabama had its worst flash flooding ever as thunderstorms unloaded 8 to 16 inches of rain over the metro area in a couple of hours. Damage was set at 36 million dollars.
...1986... Sacramento, California hit the 100 degree mark, breaking the previous record for this day of 92 degrees which was set in 1944. This is the earliest in the season Sacramento has hit the 100 degree mark.
...1987... Unseasonably hot weather prevailed in the western U.S. A dozen cities in California reported record high temperatures for the date. Afternoon highs of 93 degrees at San Francisco, 98 degrees at San Jose, 100 degrees at Sacramento, and 101 degrees at Redding, were the warmest of record for so early in the season. The high of 94 degrees at Medford OR was also the warmest of record for so early in the season.
Parts of the western U.S. were in the midst of a blistering May heat wave. The reading of 100 degrees in Downtown Sacramento CA was their earliest of record. Sacramento CA established daily record highs on nine of eleven days between the 4th and the 14th.
...1988... A stubborn low pressure system continued to drench the eastern U.S. with rain. Thunderstorms again produced large hail in North Carolina.
...1989... Thunderstorms swept across Georgia and the Carolinas during the late afternoon and evening hours spawning seventeen tornadoes. A tornado at Toccoa GA injured 15 persons, and a tornado at Chesnee SC killed two persons and injured 35 others. Five tornadoes in North Carolina accounted for five deaths, 88 injuries, and sixty million dollars damage. Thunderstorms also produced baseball size hail at Lake Murray SC, and wind gusts to 78 mph at Brooklyn MD.
...1990... A strong Pacific cold front moving rapidly inland caused weather conditions at the east end of the Strait of Juan de Fuca in Washington State to quickly change from sunny and calm to westerly winds of 60 mph and ten-foot waves. Three recreational fishing boats capsized in heavy seas off Port Angeles resulting in five deaths. In California, temperatures soared above 90 degrees across much of the state. The high of 101 degrees in downtown Los Angeles was eight degrees hotter than their previous record for the date.
An HP super cell thunderstorm rapidly developed just ahead of a fast moving bow echo squall line and blasted Tarrant county, Texas. Large hail up to 5 inches in diameter, driven by 80 mph winds, caused a tremendous amount of damage. 10,000 people were caught out in the open at Mayfest in downtown Forth Worth, resulting in 109 injuries from the large hail. Torrential rains of up to 3 inches in 30 minutes and 5 inches in one hour across Dallas caused unprecedented flash flooding, resulting in 16 deaths. Total damage in Forth Worth alone was estimated at 2 billion dollars, making this the costliest thunderstorm event in U.S. history. This was the third severe hailstorm to strike the area in only a little over a month.