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:SVR
Watch #:
SAW Issuance201803171916-KWNS-WWUS30-SAW9
SEL Issuance201803171920-KWNS-WWUS20-SEL9
Watch Probs201803171914-KWNS-WWUS40-WWP9
Issue:2018-03-17 19:20 UTC
Expired/Cancelled:2018-03-18 04:04 UTC
WOU Outline Shapefiles20Z, 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>-99.68,33 -95.4,32.93 -95.4,30.89 -99.68,30.96 -99.68,33</coordinates></LinearRing></outerBoundaryIs></Polygon></MultiGeometry>

Watch Polygon (GeoJSON):

{"type":"MultiPolygon","coordinates":[[[[-99.68,33],[-95.4,32.93],[-95.4,30.89],[-99.68,30.96],[-99.68,33]]]]}