This application presents a browsable archive of SPC issued tornado and severe thunderstorm watches. Each sequential watch is assigned a numeric ID, which uniquely identifies a watch for each year. Up until 2006, the polygon was the valid area of the watch. Since then, the valid area is issued by county and marine zone.
Related Links: View This Watch on SPC Website Download Watches List PDS Watches
Initial Watch Box and Watch By County Outline
Local Storm Reports:
Watch Polygon (KML):
<MultiGeometry><Polygon><outerBoundaryIs><LinearRing><coordinates>-85.44,38 -81.81,37.59 -81.81,35.72 -85.44,36.13 -85.44,38</coordinates></LinearRing></outerBoundaryIs></Polygon></MultiGeometry>
Watch Polygon (GeoJSON):
{"type":"MultiPolygon","coordinates":[[[[-85.44,38],[-81.81,37.59],[-81.81,35.72],[-85.44,36.13],[-85.44,38]]]]}