Days Until Tornado Season
Tornado season is not one date — it shifts north and changes by region. Pick where you live for a live countdown to your area's peak severe-weather window.
Why tornado season moves
Tornadoes need warm, moist air near the surface, cold dry air aloft, and strong wind shear. That combination first sets up over the Gulf Coast and Deep South in late winter, then marches north with the strengthening sun through spring and into early summer. By July the sharpest activity has reached the northern Plains and Canada.
The Deep South starts first
Dixie Alley peaks in March, April, and May, earlier than the classic Plains season. Southern tornadoes are especially dangerous: they often arrive at night, move fast, and hide inside rain, which is why the region suffers a disproportionate share of fatalities.
The Plains peak in May and June
The traditional heart of Tornado Alley — Oklahoma, Kansas, and north Texas — peaks in May and early June, when Gulf moisture and strong upper winds overlap most reliably. This is the window most storm chasers target.
The North peaks in summer
Nebraska, the Dakotas, Minnesota, and the Canadian Prairies see their most active stretch from June into July, once warmth and moisture finally reach that far north.
Do not forget the second season
Many areas, especially the Deep South and lower Midwest, get a secondary autumn peak in October and November as cold fronts return and clash with lingering warm, humid air. Tornadoes are possible in every month of the year given the right setup, so a countdown marks the peak risk window, not the only risk.
Use the wait to get ready
Whatever your countdown says, the offseason is the time to prepare: identify your safe room, buy a NOAA weather radio, set up phone alerts, and practise your plan. When the season arrives, know the difference between a watch and a warning and act the moment a warning is issued.