Plot Description:

Statistical Consideration: It is not necessarily a straight forward statistic to compute the number of days that a given location was at a outlook threshold. The near term outlooks are updated multiple times per day, so a given location could be under a moderate risk during the morning hours and then downgraded to general thunder for the evening hours after the storm passes. The algorithm aggregates the selected threshold for each convective day (outlooks end at 12 UTC), taking the union of whatever geometries are present. Additionally, the geometries are the area at or above the given threshold. For example, consider Iowa engulfed by a moderate risk for the entire day. If you plotted the enhanced threshold, this event would count for that enhanced threshold statistic. There is no one-right-way to do this.

Info This autoplot currently only considers outlooks since 2002.

Updated 31 Dec 2024: This autoplot will no longer emit a hacky CSV/Excel file. Instead, it will return a GeoTIFF with the analysis grid. If this causes you heartburn, please let me know.

Autoplot 248 is similar, but generates chart of days per year by WFO, state.