IEM :: NWS DMX issued Impact Based Warning Tags for 2026

About This Application: This tool lists Flash Flood, Marine, Severe Thunderstorm, and Tornado Warnings issued by the National Weather Service for a given year, including metadata tags from initial warnings or followup statements.
Important: Not all offices include these tags in their warnings! Data goes back to 2002, though tags weren't used until recent years.

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Data Access

JSON endpoint:

https://mesonet.agron.iastate.edu/json/ibw_tags.py?wfo=DMX&year=2026

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Data Generation: Based on data generated at 2026-04-06T16:10:22Z. Tables are cached for approximately one hour - check back later for updated values.

Warning Tag Statistics Summary

This table summarizes the tag counts by considering each warning's lifecycle and tries to avoid double counting. For example, a CONSIDERABLE damage tag used anywhere in the lifecycle would count as 1 event for that tag. This also means that the shown percentages will sometimes add up to a value greater than 100%, since tags update with the product lifecycle.

Severe Thunderstorm Warnings

Total Events: 20

Wind Tag:

Value	Count	%
`60`	18	90%
`50`	3	15%

Hail Tag:

Value	Count	%
`1`	18	90%
`1.25`	3	15%
`1.75`	1	5%
`0.75`	4	20%
`0.88`	1	5%
`2`	1	5%
`1.5`	1	5%

Tornado Tag:

Value	Count	%
`POSSIBLE`	5	25%

Damage Tag:

Value	Count	%
`CONSIDERABLE`	2	10%

Tornado Warnings

Total Events: 2

Hail Tag:

Value	Count	%
`1`	1	50%
`1.25`	1	50%
`1.5`	1	50%
`2`	1	50%

Tornado Tag:

Value	Count	%
`RADAR INDICATED`	2	100%

Tornado Warnings

Tornado warnings with associated impact-based warning tags and damage assessments.

Eventid	Product	WFO	Start (UTC)	End	Counties/Parishes	Hail Tag	Tornado Tag	Storm Speed (kts)
1	Text	DMX	2026/04/02 1929	1952	Wayne [IA]	1.00	RADAR INDICATED	27
1.SVS	Text	DMX	2026/04/02 1938	1952	Wayne [IA]	1.00	RADAR INDICATED	46
2	Text	DMX	2026/04/02 2003	2035	Wapello [IA]	1.25	RADAR INDICATED	35
2.SVS	Text	DMX	2026/04/02 2016	2024	Wapello [IA]	1.50	RADAR INDICATED	35
2.SVS	Text	DMX	2026/04/02 2024	2035	Wapello [IA]	2.00	RADAR INDICATED	35

Severe Thunderstorm Warnings

Severe thunderstorm warnings including wind, hail, and tornado tags with storm speed data.

Eventid	Product	WFO	Start (UTC)	End	Counties/Parishes	Wind Tag	Hail Tag	Tornado Tag	Damage Tag	Storm Speed (kts)
1	Text	DMX	2026/03/07 0010	0044	Cass [IA]	60	1.00			47
1.SVS	Text	DMX	2026/03/07 0032	0044	Cass [IA]	60	1.00			46
2	Text	DMX	2026/03/07 0123	0152	Boone [IA], Dallas [IA], Polk [IA]	50	1.25			47
2.SVS	Text	DMX	2026/03/07 0144	0152	Boone [IA], Dallas [IA], Polk [IA]	50	1.00			38
3	Text	DMX	2026/03/10 2306	2345	Wapello [IA], Davis [IA]	60	1.00			41
3.SVS	Text	DMX	2026/03/10 2311	2326	Wapello [IA], Davis [IA]	60	1.75		CONSIDERABLE	41
3.SVS	Text	DMX	2026/03/10 2326	2342	Wapello [IA], Davis [IA]	60	1.00			44
4	Text	DMX	2026/03/11 0022	0100	Davis [IA]	60	1.00			41
4.SVS	Text	DMX	2026/03/11 0031	0046	Davis [IA]	60	1.00			41
4.SVS	Text	DMX	2026/03/11 0046	0100	Davis [IA]	60	1.00			41
5	Text	DMX	2026/03/30 2303	2330	Dallas [IA], Polk [IA], Story [IA]	60	1.00			46
5.SVS	Text	DMX	2026/03/30 2317	2328	Dallas [IA], Polk [IA], Story [IA]	60	1.00			46
6	Text	DMX	2026/03/31 0144	0230	Audubon [IA], Adair [IA], Cass [IA], Guthrie [IA]	60	1.00			27
6.SVS	Text	DMX	2026/03/31 0212	0220	Audubon [IA], Adair [IA], Cass [IA], Guthrie [IA]	60	1.00			27
6.SVS	Text	DMX	2026/03/31 0220	0230	Audubon [IA], Adair [IA], Cass [IA], Guthrie [IA]	60	1.00			27
7	Text	DMX	2026/03/31 0211	0300	Greene [IA], Boone [IA], Dallas [IA], Guthrie [IA], Polk [IA]	60	1.00			33
7.SVS	Text	DMX	2026/03/31 0238	0300	Greene [IA], Boone [IA], Dallas [IA], Guthrie [IA], Polk [IA]	60	1.00			33
8	Text	DMX	2026/03/31 0253	0400	Jasper [IA], Boone [IA], Dallas [IA], Marshall [IA], Polk [IA], Story [IA]	60	1.00			31
8.SVS	Text	DMX	2026/03/31 0323	0338	Jasper [IA], Boone [IA], Dallas [IA], Marshall [IA], Polk [IA], Story [IA]	60	1.00			31
8.SVS	Text	DMX	2026/03/31 0338	0400	Jasper [IA], Boone [IA], Dallas [IA], Marshall [IA], Polk [IA], Story [IA]	60	1.00			31
9	Text	DMX	2026/03/31 0336	0415	Dallas [IA], Polk [IA]	60	1.00			31
9.SVS	Text	DMX	2026/03/31 0357	0413	Dallas [IA], Polk [IA]	50	1.00			31
10	Text	DMX	2026/03/31 0348	0430	Jasper [IA], Story [IA], Tama [IA], Marshall [IA], Polk [IA], Poweshiek [IA]	60	1.00			35
10.SVS	Text	DMX	2026/03/31 0403	0425	Jasper [IA], Story [IA], Tama [IA], Marshall [IA], Polk [IA], Poweshiek [IA]	60	1.00			35
11	Text	DMX	2026/03/31 0355	0425	Guthrie [IA], Dallas [IA]	60	1.00			15
11.SVS	Text	DMX	2026/03/31 0408	0415	Guthrie [IA], Dallas [IA]	60	1.00			15
11.SVS	Text	DMX	2026/03/31 0415	0425	Guthrie [IA], Dallas [IA]	60	1.00			30
12	Text	DMX	2026/04/02 1837	1930	Decatur [IA], Wayne [IA]	60	1.00			33
12.SVS	Text	DMX	2026/04/02 1845	1908	Decatur [IA], Wayne [IA]	60	1.00			33
12.SVS	Text	DMX	2026/04/02 1908	1930	Decatur [IA], Wayne [IA]	60	0.75			33
13	Text	DMX	2026/04/02 1906	1945	Appanoose [IA], Lucas [IA], Monroe [IA], Wayne [IA]	60	0.75			39
14	Text	DMX	2026/04/02 1913	2000	Appanoose [IA], Davis [IA], Monroe [IA]	60	1.00			48
14.SVS	Text	DMX	2026/04/02 1930	1945	Appanoose [IA], Davis [IA], Monroe [IA]	60	1.00			48
14.SVS	Text	DMX	2026/04/02 1945	2000	Appanoose [IA], Davis [IA], Monroe [IA]	60	1.00			42
15	Text	DMX	2026/04/02 1924	2005	Jasper [IA], Marion [IA], Polk [IA], Warren [IA]	60	0.75			59
15.SVS	Text	DMX	2026/04/02 1933	1947	Jasper [IA], Marion [IA], Polk [IA], Warren [IA]	60	1.00			50
15.SVS	Text	DMX	2026/04/02 1947	2005	Jasper [IA], Marion [IA], Polk [IA], Warren [IA]	60	0.88	POSSIBLE		42
16	Text	DMX	2026/04/02 1941	2030	Appanoose [IA], Wayne [IA]	60	1.25	POSSIBLE		33
16.SVS	Text	DMX	2026/04/02 2007	2030	Appanoose [IA], Wayne [IA]	60	1.00			38
17	Text	DMX	2026/04/02 1945	2030	Mahaska [IA], Marion [IA], Monroe [IA], Wapello [IA]	60	1.00			34
17.SVS	Text	DMX	2026/04/02 1957	2030	Mahaska [IA], Marion [IA], Monroe [IA], Wapello [IA]	60	1.00	POSSIBLE		34
18	Text	DMX	2026/04/02 1955	2045	Davis [IA], Monroe [IA], Wapello [IA], Mahaska [IA]	60	1.00	POSSIBLE		38
18.SVS	Text	DMX	2026/04/02 2018	2027	Davis [IA], Monroe [IA], Wapello [IA], Mahaska [IA]	60	1.25			38
18.SVS	Text	DMX	2026/04/02 2027	2036	Davis [IA], Monroe [IA], Wapello [IA], Mahaska [IA]	60	2.00		CONSIDERABLE	38
19	Text	DMX	2026/04/02 2014	2100	Appanoose [IA], Monroe [IA], Wapello [IA], Wayne [IA], Davis [IA]	60	0.75			30
19.SVS	Text	DMX	2026/04/02 2031	2044	Appanoose [IA], Monroe [IA], Wapello [IA], Wayne [IA], Davis [IA]	60	0.75			31
19.SVS	Text	DMX	2026/04/02 2044	2100	Appanoose [IA], Monroe [IA], Wapello [IA], Wayne [IA], Davis [IA]	60	0.75			37
20	Text	DMX	2026/04/03 2131	2215	Taylor [IA]	50	1.00	POSSIBLE		36
20.SVS	Text	DMX	2026/04/03 2152	2202	Taylor [IA]	50	1.50	POSSIBLE		31
20.SVS	Text	DMX	2026/04/03 2202	2214	Taylor [IA]	50	1.00			29

Flash Flood Warnings

Flash flood warnings with flood impact tags, heavy rain indicators, and infrastructure threats.

Eventid	Product	WFO	Start (UTC)	End	Counties/Parishes	Flash Flood Tag	Damage Tag	Heavy Rain Tag	Dam Tag	Leeve Tag

Marine Warnings

Marine weather warnings including wind, hail, and waterspout tags for coastal and offshore areas.

Eventid	Product	WFO	Start (UTC)	End	Counties/Parishes	Wind Tag	Hail Tag	Waterspout Tag	Storm Speed (kts)