IEM :: VTEC Yearly Event Counts

This page presents the number of VTEC events issued by either all of the NWS or a selected WFO. These numbers are based on the IEM maintained archive and are not official. Please be careful of the presentation of zeros, as some VTEC products were only recently added and don't go back prior to 2005. The IEM retrospectively assigned VTEC events to some warnings prior to implementation in fall 2005. Note: the numbers shown are the unique combinations of VTEC event ids and WFO, so a single tornado watch event issued by four WFOs would count as four in this summary, when summarizing all WFOs!

Hopefully, you can copy/paste this table into your favorite spreadsheet program for further analysis...

Option 1: All VTEC Events by Year

Limit Numbers by WFO:

Option 2: Count of One VTEC Phenomena and Significance by WFO

Data for only FWD shown

P	S	Phenomena	Significance	1986	1987	1988	1989	1990	1991	1992	1993	1994	1995	1996	1997	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009	2010	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023	2024	2025
CW	Y	Cold Weather	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	4
DU	Y	Blowing Dust	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
EC	A	Extreme Cold	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1
EC	W	Extreme Cold	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1
EH	A	Excessive Heat	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	1	1	0	0	0	0	0	0
EH	W	Excessive Heat	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	1	0	2	0	4	13	7	0
FA	A	Flood	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	1	0	1	0	0	1	0	0	5	0	0	1	3	4	13	11
FA	W	Flood	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	14	44	24	3	15	5	5	163	53	12	16	5	18	11	9	8	30	28
FA	Y	Flood	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	132	241	169	48	87	84	133	398	288	262	184	121	148	154	89	123	128	87
FF	A	Flash Flood	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	2	20	6	11	5	1	3	5	4	22	7	6	6	4	5	6	0	0	0	0
FF	W	Flash Flood	Warning	93	51	25	107	193	175	63	69	72	137	123	191	134	78	90	53	49	19	138	58	78	418	93	118	85	15	26	27	51	248	101	44	25	25	28	23	28	41	157	122
FG	Y	Dense Fog	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	9	10	8	12	6	10	10	15	7	10	11	12	10	22	14	11	9	10	19	11
FL	W	Flood	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	60	76	134	103	15	65	20	13	319	193	46	188	177	130	122	28	67	173	118
FL	Y	Flood	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0
FR	Y	Frost	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	2	0	1	3	2	1	1	0	1	1	0	0	2	2	0	0	0	1
FW	A	Red Flag	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	2	14	7	8	18	1	1	5	1	4	2	5	0	0	0	5	1	0	4
FW	W	Red Flag	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	9	6	20	16	12	28	2	1	8	1	8	2	6	0	0	0	9	13	0	8
FZ	A	Freeze	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	1	2	0	2	1	3	2	3	1	0	2	1	1
FZ	W	Freeze	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	2	3	4	1	6	3	1	3	5	5	2	2	1	5	3	4	4	3	5	1	1
HI	W	Inland Hurricane	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
HT	Y	Heat	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	4	2	2	3	3	7	2	4	2	3	5	8	4	6	8	13	8	18	10	8
HW	A	High Wind	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1
HW	W	High Wind	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	6	1	2	1	0	0	2	1	0	1	0	1	0	1	0	0	1	0	3	2
HZ	A	Hard Freeze	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	0
HZ	W	Hard Freeze	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	2	0	1	0	0	1	1	1	0	0	2	2	0	3	0
IS	W	Ice Storm	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	1	0	0	0	0	0	0	0	0	1	0	0	0	0	1	0	0
SM	Y	Dense Smoke	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0
SN	Y	Snow	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	3	3	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
SV	A	Severe Thunderstorm	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	27	20	35	38	13	32	28	22	20	16	20	17	11	27	18	22	22	40	40	36
SV	W	Severe Thunderstorm	Warning	447	408	327	468	489	525	577	402	559	689	631	362	415	357	406	267	258	408	434	333	368	357	411	510	252	555	318	272	288	387	313	320	219	350	212	274	259	561	435	435
TI	A	Inland Tropical Storm	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
TI	W	Inland Tropical Storm	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0
TO	A	Tornado	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	19	22	35	24	11	20	10	7	9	27	4	9	8	9	10	9	11	13	25	14
TO	W	Tornado	Warning	85	52	51	63	83	64	31	57	90	70	58	62	41	41	39	22	21	15	29	7	53	47	62	45	53	107	24	34	8	155	37	39	27	45	37	22	83	66	60	52
WC	A	Wind Chill	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0
WC	W	Wind Chill	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	0	0	0
WC	Y	Wind Chill	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	1	3	0	1	3	0	0	1	0	0	0	0	2	0	2	0
WI	Y	Wind	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	15	29	12	34	26	16	22	14	7	18	10	9	16	9	10	8	12	11	6	5	6
WS	A	Winter Storm	Watch	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	2	4	1	1	2	3	0	2	0	3	0	0	3	0	2	2	1	1	0	1
WS	W	Winter Storm	Warning	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	2	2	3	4	1	2	3	3	0	0	1	1	2	4	2	1	0	1
WW	Y	Winter Weather	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	2	9	1	4	5	4	3	7	10	7	0	3	7	4	4	3	3	1	2	3
ZF	Y	Freezing Fog	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	3	0	0	3	0	1	0	0	0	0	0	1	0	1	1	1
ZR	Y	Freezing Rain	Advisory	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	3	3	2	0	0	0	1	3	1	0	0	0	0	0	0	0	0	0	0