St. Delkus says we may be in for a tornado today. That shouldn’t really come as a surprise. April is Dallas’ peak month for tornadoes, according to this new interactive weather map created by U.S. Tornadoes that tracks the high-point of the tornado season across every county in the United States. Dallas County averages 22 tornadoes in April historically. As you scroll your mouse over the map, you may notice something of a pattern. The data suggests tornado season is migratory:
As we’ve shown in a number of other articles, tornadoes are like snowbirds — they winter in the South. Even there, cool and dry is the name of the game more often than not in the weeks around the new year when tornado tallies reach their minimum. Cold-season tornadoes are generally limited, but larger events happen.
Moving out of winter, we typically see tornadoes move back north and northwest through the Mid-South and Southeast during early spring, then into the Midwest and Plains heading into summer. The main tornado zone ultimately reaches the U.S./Canada border area by July or so, before crashing back southward (with occasional outbursts) during fall.