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 #:	1997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024
SAW Issuance	201709192035-KWNS-WWUS30-SAW7
SEL Issuance	201709192035-KWNS-WWUS20-SEL7
Watch Probs	201709192034-KWNS-WWUS40-WWP7
Issue:	2017-09-19 20:35 UTC
Expired/Cancelled:	2017-09-20 05:03 UTC
WOU Outline Shapefiles	21Z, 22Z, 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>-95.76,48.97 -96.62,43.4 -100.41,43.4 -99.94,48.97 -95.76,48.97</coordinates></LinearRing></outerBoundaryIs></Polygon></MultiGeometry>

Watch Polygon (GeoJSON):

{"type":"MultiPolygon","coordinates":[[[[-95.76,48.97],[-96.62,43.4],[-100.41,43.4],[-99.94,48.97],[-95.76,48.97]]]]}