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=2022

Select Year:

Max VTEC ETN listing for 2022

Table generated at: 2022-01-22T00:37:48Z

phenomena AS BH BZ CF FA FF FG FL FR FW FZ GL HW HZ IS LE LO LS LW MA MF RP SC SE SQ SR SU SV TO TS UP WC WI WS WW ZF
significance O Y S W A S W Y A W Y A W Y A W Y Y A W A W A W A W A W W W Y W Y Y W Y S Y A W W A W W Y A W A W W Y A W Y A W Y Y A W Y Y
wfo                                                                                                                            
AAQ 3
ABQ 1 1 2 3 1 7 2
ABR 1 1 3 8 5 1 1 5
AFC 2 1 2 2 1 5
AFG 3 2 3 1 1 12 4 3 12
AJK 1 3 2 1 5 3 3 3 7
AKQ 2 3 3 5 1 1 4 6 9 1 11 1 3 2 3 3 7
ALY 1 1 1 1 2 3 2 1 8
AMA 1 2 1 1 2 1
APX 3 7 9 2 1 2 6
ARX 1 1 6 1 1 4
BGM 1 1 2 3 2 1 8
BIS 1 4 7 4 1 1 5
BMX 2 1 1 1 14 2 2 3
BOI 1 4 2 1 1 4
BOU 2 2 1 1 5
BOX 1 1 1 3 2 5 10 2 2 1 10 2 2 2 1 1 3 4 4 3 7
BRO 2 2 3 2 2 2 4 2 3 2 3 7 9 1 1 1 2 1 1 2
BTV 1 1 2 4 1 1 2 4
BUF 1 1 2 2 1 1 10 1 2 4 5 1 6
BYZ 1 2 6 1 4
CAE 1 4 1 1 3 1 1 3 1 2
CAR 1 1 1 1 2 7 1 1 8 2 2 1 1 4 2 2 7 1 3 3 7
CHS 6 3 1 3 3 11 1 1 1 11 2 1 1
CLE 1 1 1 1 1 2 6 1 3 1 8
CRP 6 1 1 1 4 2 4 5 10 1 3 1 1
CTP 1 1 1 1 1 1 2 2 6
CYS 1 2 5 9 2 1 1 4
DDC 2 1 1 2 1
DLH 3 8 13 1 6 2 9 1 2 2 4
DMX 1 8 1 1 1 3
DTX 5 5 2 9 2 1 3
DVN 2 5 1 1 3
EAX 3 1 1 1 3
EKA 1 1 3 1 1 2 3 1 9 2 2 1 1
EPZ 1
EWX 1 1 1 2 1 1 1
FFC 11 1 5 9 1 2 1 2 4
FGF 3 4 7 1 3 1 8
FSD 6 3 1 1 4
FWD 1 1
GGW 1 1 3 5 6
GID 1 1 2
GJT 2 1 1 2 2 2
GLD 1 2 1 2
GRB 3 3 9 6 1 2 3
GRR 3 6 10 1 5
GSP 5 1 1 7 1 4 2 3 3
GUM 3 3 2
GYX 1 3 1 4 1 3 7 1 1 9 2 2 4 2 2 5 2 2 2 5
HEB 1 1
HFO 1 16 4 11 4 3 5 1
HGX 2 3 5 3 2 2 2 4 1 2 7 1 3 2 12 16 12 13 10 4 1
HNX 13 1 1 2
HUN 2 8 4 12 7 5 1 1 3 3
ICT 1 2 1 2
ILM 8 5 2 5 1 1 7 1 2 3 12 1 2 1 2
ILN 2 3 3 1 1 1 2 4
ILX 1 2 1 3
IND 4 1 1
IWX 1 2 7 1 1 1 5
JAN 2 17 8 14 4 1 1 2
JAX 1 3 2 4 3 3 2 2 2 3 8 2 11 2
JKL 1 4 10 6 8 19 14 4 2 2 3 4
JSJ 4 1 4 4 2
KEY 4 28 1 6 1
LBF 2 1 1 1 3 1 1 1
LCH 3 2 1 3 2 2 3 4 2 6 16 2 13 2 3
LIX 1 2 3 1 4 1 3 4 9 2 3 1
LKN 2 1
LMK 1 12 4 19 37 16 3 7 1 2 4
LOT 1 2 3 1 2 11 1 1 1 1 1 3
LOX 2 2 1 2 2 1 2 11 3 7
LSX 2 1 1 4
LUB 2 3 2 2 2
LWX 2 1 5 2 4 7 1 5 23 1 4 4 3 3 8
LZK 1 6 7 1 17 2 5 1 1 1 4
MAF 3 3 4 4 1 1 3 1
MEG 5 1 14 6 11 5 2 2 1 1 2 4
MFL 1 10 3 2 1 21 1 4 5 2 9 15 12 1
MFR 2 1 1 1 1 2 3 1 1 2 1 2 9 2 5 1 1 3 1 1 3 2
MHX 1 1 1 6 1 3 8 1 2 1 4 3 8 2 4 5 12 3 1 1 2
MKX 5 6 8 1 3 2
MLB 1 1 1 1 5 4 7 2 1 1
MOB 1 3 1 1 3 22 4 9 1 13 14 9 2 1
MPX 1 2 8 2 1 1 5
MQT 6 8 1 3 11 2 7 4 1 1 2 6
MRX 1 3 1 2 4 7 3 2 3 6 1
MSO 1 3 3 1 1 4 8 1
MTR 1 1 1 7 2 1 1 1 4 15 1 1
OAX 6 1 1 1
OHX 2 3 31 19 4 3 1 1 3 4 1
OKX 1 5 1 4 2 7 1 1 6 1 11 1 1 1 2 1 1 1 6
OTX 6 2 1 2 3 6
OUN 1 1 2 1 3 2 1
PAH 2 1 5 1 18 4 5 2 3 1 6
PBZ 1 2 4 1 1 2 3
PDT 1 5 1 6 1 2 6 7
PHI 2 3 2 30 3 1 1 6 5 6 2 11 1 3 2 1 2 2 3 6
PIH 2 3 1 1 2 5
PQR 1 2 1 4 3 1 6 1 6 3 14 1 5 2 2 1 13 2 2 2 2 4
PSR 1 1 2
PUB 1 1 3 1 2 1 4
RAH 1 2 2 1 4 5 1 2 2 4
REV 1 1 4 2 1
RIW 2 3 1 1 1 4
RLX 18 2 2 1 4 1 2 3 6
RNK 2 1 1 4 2 2 3 4 1
SEW 1 1 7 4 1 4 2 30 5 7 2 15 2 5 1 2 7
SGF 1 3
SGX 1 1 2 1 1 1 1 1 4
SHV 1 1 16 9 13 4 1 1 2
SJT 2 3 1
SLC 4 1 1 1 1
STO 3 1 2 1 1 2
TAE 1 2 2 3 3 1 1 2 19 10 8 1 3 23 11 4 2
TBW 1 2 1 4 2 1 1 8 1 3 4 1 1 11
TFX 2 1 1 2 3 6 1 3 1 1 8
TOP 2 2
TSA 1 1 1 1 1 2 1 1 1 3
UNR 2 2 1 3 5 2
VEF 2 1