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 Issuance201710232137-KWNS-WWUS30-SAW9
SEL Issuance201710232140-KWNS-WWUS20-SEL9
Watch Probs201710232136-KWNS-WWUS40-WWP9
Issue:2017-10-23 21:40 UTC
Expired/Cancelled:2017-10-24 05:43 UTC
WOU Outline Shapefiles22Z, 23Z, 00Z, 01Z, 02Z, 03Z, 04Z, 05Z,

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>-80.4,38.4 -77.76,37.34 -77.76,34.88 -80.4,35.95 -80.4,38.4</coordinates></LinearRing></outerBoundaryIs></Polygon></MultiGeometry>

Watch Polygon (GeoJSON):

{"type":"MultiPolygon","coordinates":[[[[-80.4,38.4],[-77.76,37.34],[-77.76,34.88],[-80.4,35.95],[-80.4,38.4]]]]}