Add another stat onto the pile showing the cold that has mostly plagued the state this spring season. The first Tornado Warning of the year was issued over Iowa early Monday evening as some impressive wind sheer worked into far southwestern Iowa. The featured chart depicts the period between the first and last Tornado Warning each year over Iowa based on unofficial archives maintained by the IEM. This year's first warning was the second latest into the year since 1986. The only year with a later date was 1993. Of course, 1993 was the epic flood year for the state.

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Tags:   warning   nws