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:	SVR
Watch #:	1997199819992000200120022003200420052006200720082009201020112012201320142015201620172018201920202021202220232024
SAW Issuance	201709051923-KWNS-WWUS30-SAW0
SEL Issuance	201709051925-KWNS-WWUS20-SEL0
Watch Probs	201709051921-KWNS-WWUS40-WWP0
Issue:	2017-09-05 19:25 UTC
Expired/Cancelled:	2017-09-06 00:03 UTC
WOU Outline Shapefiles	20Z, 21Z, 22Z, 23Z, 00Z,

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>-74.18,40.93 -76.23,38.97 -78.66,38.97 -76.68,40.93 -74.18,40.93</coordinates></LinearRing></outerBoundaryIs></Polygon></MultiGeometry>

Watch Polygon (GeoJSON):

{"type":"MultiPolygon","coordinates":[[[[-74.18,40.93],[-76.23,38.97],[-78.66,38.97],[-76.68,40.93],[-74.18,40.93]]]]}