Tornadoes can happen at any time of the year and at any time during the day or night. Tornadoes are most likely to happen in the United States during March through August. There is a general northward shift in the “tornado season” from late winter through mid-summer. Regionally, tornado activity increases in the central Gulf Coast as early as February, then shifts to the southeastern Atlantic states in March and April before moving to the southern Plains in May and early June. The greatest amount of tornado activity is in June and July in the northern Plains and upper Midwest. Statistically, most tornadoes strike between 4:00P.M. and 9:00P.M.