They have an annual tornado season. Seems that warm moist air from the Gulf travels north and mixes with the cooler winds off the Sierras and around they go.
Tornado Season. Tornadoes can occur at any time of the year. In southern states, peak tornado occurrence is March through May, while peak months in northern states are during the summer. Tornadoes are most likely between 3 and 9 p.m. but have occurred at all hours.Nov 1, 2019