This page provides a download interface to IEM processed metadata/geometries associated with National Weather Service VTEC-enabled watch, warning, and advisory events. You can download this information on-demand in a zip-file (containing a shapefile + CSV), KML, or Microsoft Excel format.

If you are looking for a real-time source of warning shapefiles, you can find that here.

If you do not limit the state or WFO output, you are limited to downloading 5 years of data at a time. The reason being to keep the requests from timing out as the response content is delivered on the fly.

Related: SPC Convective Discussions   SPC Outlooks   SPC Watch Polygons   WPC Precip Discussions

Limit State

Limit Weather Forecast Office (WFO)

Select time interval

(Times are in UTC.
YearMonthDay HourMinute
Option 1: WWA events with start time between the specified start and end dates.
Start:
End:
Option 2: WWA events valid at this exact time (UTC)
Valid:




* Only Storm Based Warnings are available via KML.
[1] By default, only the issuance polygon is included.

Shapefile DBF schema:

A discussion of the schema can be found on the FAQ Page for this dataset.

Pre-generated zip files

These files are same as you could download from the form on the left, just you don't have to wait so long! The current year's data is current up until roughly 2 AM this morning.

YearAllLimit Tor,Svr,Mar,FF Limit Storm Based
Tor,Svr,Mar,FF
1986Zip (7.22 MB)Zip (7.22 MB)N/A (0 MB)
1987Zip (6.1 MB)Zip (6.1 MB)N/A (0 MB)
1988Zip (5.53 MB)Zip (5.53 MB)N/A (0 MB)
1989Zip (8.5 MB)Zip (8.5 MB)N/A (0 MB)
1990Zip (10.75 MB)Zip (10.75 MB)N/A (0 MB)
1991Zip (10.26 MB)Zip (10.26 MB)N/A (0 MB)
1992Zip (10.38 MB)Zip (10.38 MB)N/A (0 MB)
1993Zip (11.32 MB)Zip (11.32 MB)N/A (0 MB)
1994Zip (12.51 MB)Zip (12.51 MB)N/A (0 MB)
1995Zip (17.8 MB)Zip (17.8 MB)N/A (0 MB)
1996Zip (20.31 MB)Zip (20.31 MB)N/A (0 MB)
1997Zip (19.95 MB)Zip (19.95 MB)N/A (0 MB)
1998Zip (25.89 MB)Zip (25.89 MB)N/A (0 MB)
1999Zip (19.88 MB)Zip (19.88 MB)N/A (0 MB)
2000Zip (19.53 MB)Zip (19.53 MB)N/A (0 MB)
2001Zip (19.39 MB)Zip (19.39 MB)N/A (0 MB)
2002Zip (13.08 MB)Zip (13.08 MB)Zip (1.49 MB)
2003Zip (14.78 MB)Zip (14.78 MB)Zip (2.35 MB)
2004Zip (15.52 MB)Zip (15.52 MB)Zip (2.64 MB)
2005Zip (33.24 MB)Zip (16.5 MB)Zip (2.73 MB)
2006Zip (90.52 MB)Zip (16.57 MB)Zip (3.29 MB)
2007Zip (107.32 MB)Zip (15.61 MB)Zip (2.78 MB)
2008Zip (152.93 MB)Zip (28.76 MB)Zip (4.15 MB)
2009Zip (145.4 MB)Zip (26.97 MB)Zip (3.38 MB)
2010Zip (149.21 MB)Zip (25.61 MB)Zip (3.25 MB)
2011Zip (160.15 MB)Zip (35.14 MB)Zip (4.08 MB)
2012Zip (144.37 MB)Zip (25.69 MB)Zip (3.21 MB)
2013Zip (142.25 MB)Zip (25.46 MB)Zip (2.88 MB)
2014Zip (134.65 MB)Zip (20.38 MB)Zip (2.75 MB)
2015Zip (125.42 MB)Zip (23 MB)Zip (3.18 MB)
2016Zip (115.63 MB)Zip (21.86 MB)Zip (3.08 MB)
2017Zip (125.36 MB)Zip (22.91 MB)Zip (3.2 MB)
2018Zip (137.35 MB)Zip (23.05 MB)Zip (3.06 MB)
2019Zip (145.04 MB)Zip (26.82 MB)Zip (3.55 MB)
2020Zip (138.96 MB)Zip (21.12 MB)Zip (3.06 MB)
2021Zip (176.49 MB)Zip (9.41 MB)Zip (3.18 MB)
2022Zip (146.51 MB)Zip (8.08 MB)Zip (2.59 MB)

Service changes:

Archive status:

Dataset componentStart TimeNotes
Tornado
Severe T'storm
Flash Flood
Special Marine
1 Jan 2002 (Polygons)
1 Jan 1986 (Counties)
Only the initial polygon is used. Polygon updates in the SVS statements are ignored. The VTEC attributes didn't appear until they became operational.
All VTEC watch/warn 12 Nov 2005 Products other than Tornado and Severe Thunderstorm Warnings.
SVR,TOR Watch by County 12 Nov 2005