1. Severe Wx Products
  2. Storm Prediction Center Convective Watch Archive

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

All active watches at issuance:

Previous Watch   --   Next Watch

Type:TOR
Watch #:
SAW Issuance201709091606-KWNS-WWUS30-SAW1
SEL Issuance201709091610-KWNS-WWUS20-SEL1
Watch Probs
Issue:2017-09-09 16:10 UTC
Expired/Cancelled:2017-09-10 04:00 UTC
WOU Outline Shapefiles17Z, 18Z, 19Z, 20Z, 21Z, 22Z, 23Z, 00Z, 01Z, 02Z, 03Z, 04Z,

Archive Status:

  • Watch archive should be complete back to 1997.
  • RADAR composite is mostly complete back to 1997.
  • Local Storm Reports are available after 2002.

Initial Watch Box and Watch By County Outline


Local Storm Reports:

Watch Polygon (KML):

<MultiGeometry><Polygon><outerBoundaryIs><LinearRing><coordinates>-79.4,27.38 -79.08,24.3 -82.11,24.3 -82.5,27.38 -79.4,27.38</coordinates></LinearRing></outerBoundaryIs></Polygon></MultiGeometry>

Watch Polygon (GeoJSON):

{"type":"MultiPolygon","coordinates":[[[[-79.4,27.38],[-79.08,24.3],[-82.11,24.3],[-82.5,27.38],[-79.4,27.38]]]]}