IEM Daily Feature
Friday, 10 November 2023

Special Weather Statement Polygons

Posted: 10 Nov 2023 05:30 AM

When conditions are not quite to levels necessitating a warning or advisory, the National Weather Service has a sort of "catch-all" product called the Special Weather Statement (SPS). This product will be issued for one or more counties / forecast zones and can optionally include a polygon to target a more limited area. The featured map presents the number of such SPS products issued that contained a polygon so far this year. The map shows that a few offices don't issue SPS products with polygons. They are not required with the product. The IEM maintains an text archive of these and offers a shapefile download of the polygons with associated tags found within the text.

Good = 12
Bad = 1
Abstain = 1

Tags:   nws   sps