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>-94.4,38.06 -94.12,34 -96.57,34 -96.98,38.06 -94.4,38.06</coordinates></LinearRing></outerBoundaryIs></Polygon></MultiGeometry>
Watch Polygon (GeoJSON):
{"type":"MultiPolygon","coordinates":[[[[-94.4,38.06],[-94.12,34],[-96.57,34],[-96.98,38.06],[-94.4,38.06]]]]}