Three tornadoes crossed through the town of Cincinnati, Ohio and then traveled up the Ohio valley.
Savoy, Texas was hit by an F4 tornado. 14 people were killed and 60 were injured. It leveled the entire business and northeast residential sections. The tornado was described as "a funnel blazing with balls of fire".
The temperature reached 97 degrees at San Francisco, California, establishing a record high temperature for the month of May for the city.
Record late season snows fell across northwest Iowa. 10 inches fell at Lemars, 8 inches at Cherokee, and 5 inches at Sioux City.
An record late season snowstorm occurred over sections of Iowa, Nebraska, and South Dakota. Snowfall totals included 10 inches at Le Mars Iowa, 8 inches at Cherokee, Iowa, 6 inches at Newcastle, Nebraska, and 4 inches at Vermillion, South Dakota.
Sacramento, California had their hottest temperature ever recorded in the month of May, when the temperature reached 110 degrees. This broke the old record of 100 degrees which was set in 1932.
Thunderstorms produced torrential rains in Oklahoma and northern Texas. Lake Altus, Oklahoma was deluged with 9 inches of rain. Up to 8 inches of rain drenched northern Texas and baseball size hail was reported north of Seminole and at Knickerbocker. 10 to 13 inches of rain inundated central Oklahoma over the last 5 days of the month resulting in an estimated 65 million dollars damage. Flooding forced several thousand people to evacuate their homes, many by boat or by helicopter.
An F4 tornado moved through Jefferson, Bullitt, and Spencer Counties in Kentucky, injuring 10 people and doing $100 million in damages.