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March Tornadoes Surge: A New Record?
7 Mar
Summary
- March sees a significant increase in tornado activity, doubling February's numbers.
- Last year, a record 300 preliminary tornadoes were reported across 20 states.
- Warmer spring weather contributes to increased atmospheric instability and tornadoes.
March is currently witnessing a sharp rise in tornado occurrences, significantly surpassing typical numbers. This increase has been notable over the past decade, with recent years showing unprecedented activity. Last year, preliminary reports indicated approximately 300 tornadoes across 20 states, a figure that, even after revisions, is expected to set a new record.
The atmospheric conditions conducive to severe thunderstorms, including tornadoes, are amplified by a strong jet stream. This setup creates an "atmospheric tug-of-war" between different air masses, leading to sporadic but intense outbreaks. While May traditionally remains the peak month for tornadoes in the US, March's activity has become far more pronounced.
Contributing factors to this early-season surge include warmer atmospheric temperatures, which enhance instability and moisture. The combination of ample moisture, instability, changing wind speeds and directions with height (wind shear), and atmospheric lift—often provided by a cold front—creates a potent environment for tornado development.
For the entire year, the US averages about 1,230 tornadoes, a number that is also on the rise. Residents in areas prone to severe weather are advised to remain vigilant throughout the spring.
