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 Issuance201812262346-KWNS-WWUS30-SAW4
SEL Issuance201812262345-KWNS-WWUS20-SEL4
Watch Probs201812262341-KWNS-WWUS40-WWP4
Issue:2018-12-26 23:45 UTC
Expired/Cancelled:2018-12-27 08:04 UTC
WOU Outline Shapefiles00Z, 01Z, 02Z, 03Z, 04Z, 05Z, 06Z, 07Z, 08Z,

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>-97.02,30.62 -97.61,28.69 -100.75,28.69 -100.23,30.62 -97.02,30.62</coordinates></LinearRing></outerBoundaryIs></Polygon></MultiGeometry>

Watch Polygon (GeoJSON):

{"type":"MultiPolygon","coordinates":[[[[-97.02,30.62],[-97.61,28.69],[-100.75,28.69],[-100.23,30.62],[-97.02,30.62]]]]}