IEM :: VTEC Event Listing for 2025

The National Weather Service uses a system called Valid Time Event Code (VTEC) to provide more accurate tracking of its watch, warning, and advisories. The IEM attempts to provide a high fidelity database of these products. The following table is a diagnostic providing the largest VTEC eventids (ETN) for each NWS Forecast Office, each phenomena and significance for the given year. Pro-tip: Use the search box to the upper right of the table to search for a specific WFO.

The following JSON(P) Webservice provided the data you see presented on this page
https://mesonet.agron.iastate.edu/json/vtec_max_etn.py?year=2025

Max VTEC ETN listing for 2025

Table generated at: 2025-03-28T03:30:06Z

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phenomena	AS	BH	BW	BZ	CF				CW	DS		DU		EC		FA			FF		FG	FL			FR	FW		FZ		GL		HF	HW		IS	LE	LO	LS			LW	MA	MF	RP	SC	SE		SM	SQ	SR		SU		SV		TO		TS	UP			WI	WS		WW	ZF
significance	Y	S	Y	W	A	S	W	Y	Y	W	Y	W	Y	A	W	A	W	Y	A	W	Y	A	W	Y	Y	A	W	A	W	A	W	W	A	W	W	W	Y	A	W	Y	Y	W	Y	S	Y	A	W	Y	W	A	W	W	Y	A	W	A	W	Y	A	W	Y	Y	A	W	Y	Y
wfo
ABQ									11	40	12		2	1	1						2					13	12						8	10															6													20	5	6	11	3
ABR				1					9					1	6						1					4	7						1	2																												10	2	1	5
AFC			23	5	1		1	3	4							2	1	13	1		3										270	3	3	6											273						65		2							45			3	4	27
AFG			185	23					1						1						2										84		6	8	1										19						6									23		15	21	8	55
AJK									5					1	2			1			11										108		4	4											211						9									2			5	14	16
AKQ						1			7							1		8		7	2		18				1			12	13			1			5					19	10		50									27	35	56	5				2	2	5	5	8
ALY									5							1		3					7										1	2		4													10						2							11	8	4	20
AMA									5			2	3	2	2						6					10	12						4	5															10													6		2	9	2
APX									2														1							4	14			1								2			40										1							5	3	9	26
ARX				2					10					1	2						1						2																											34	5							4	3	4	9

Showing 1 to 10 of 123 entries