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=2018

Select Year:

Max VTEC ETN listing for 2018

Table generated at: 2018-02-25T06:52:50Z

phenomena BH BZ CF DU FA FF FG FL FR FW FZ GL HF HW HZ IS LE LO LS LW MA MF RB RP SC SE SI SQ SR SU SV SW TO TS UP WC WI WS WW ZF
significance S W A S W Y Y A W Y A W Y A W Y Y A W A W A W W A W A W W W Y W Y Y W Y Y S Y A W Y W A W W Y A W Y A W A W Y A W Y A W Y Y A W Y Y
wfo
AAQ 3 3 3
ABQ 8 10 5 6 12 4 4 10 3
ABR 5 1 9 3 3 6
AFC 2 1 2 3 9
AFG 13 1 1 1 4 2 4 14 10 2 8 37
AJK 2 4 4 4 5 8 18
AKQ 1 1 2 2 2 5 3 3 8 9 12 16 1 1 6 1 3 3 1 3 6
ALY 3 14 12 2 2 8 1 1 1 4 4 6 20
AMA 10 8 1 2 1 3 2 1
APX 1 2 3 1 3 1 117 1 2 1 1 13
ARX 3 4 3 8 1 4 3 10
BGM 3 18 13 1 10 1 2 1 1 2 2 3 15
BIS 6 2 15 1 2 2 6
BMX 1 8 4 7 1 1 5 2 1 1 2
BOI 3 1 3 9
BOU 1 1 1 1 1 2 3 3 3 14
BOX 1 1 2 2 2 3 12 2 1 9 10 13 20 1 1 1 4 34 1 2 1 1 2 4 7 1 1 3 6 4 4 14
BRO 9 10 1 1 2 6 2 2 1 15 10 8 1 1 3 5 1
BTV 2 29 1 10 1 1 3 1 2 4 11
BUF 1 4 10 3 11 2 1 1 1 5 1 22 1 2 1 1 3 2 3 2 54
BYZ 1 2 2 7 9 3 6 12
CAE 5 2 1 3 2 1 3 5
CAR 1 1 3 1 5 1 6 11 1 29 1 1 2 1 6 1 6 2 4 7 17
CHS 3 6 1 1 2 1 4 11 13 4 1 1 1 3
CLE 4 8 9 4 22 1 2 3 2 2 10 1
CRP 4 12 1 8 2 2 1 11 16 1 4 5 2
CTP 6 4 21 1 4 6 2 1 1 2 2 4 13
CYS 1 1 20 19 2 5 4 8 16 1
DDC 3 4 4 4 1 1 9
DLH 1 1 2 10 1 4 19 5 7 11
DMX 1 4 1 6 2 4 4 12
DTX 1 2 5 19 8 10 4 2 3 1 3 7
DVN 1 4 1 7 7 16 1 5 2 2 17
EAX 3 3 1 1 1 2 3 12
EKA 2 5 1 1 1 8 9 2 2 24 4 1 1 2 4 2 1 5
EPZ 1 1 7 3
EWX 5 6 1 1 1 1 7
FFC 1 2 15 3 6 4
FGF 1 3 3 22 2 2 3 10
FGZ 1 1 7 1 1 5
FSD 1 3 1 8 1 3 2 10
FWD 2 5 20 1 3 19 3 4 1 1 1 9 4 6 1 1 1 6
GGW 1 1 1 4 17 5 5 12
GID 1 2 2 1 2 1 2 3 1 9
GJT 5 2 5 7 14
GLD 1 1 3 2 4 2 1 6
GRB 2 2 1 4 6 2 19 6 1 4 3 8
GRR 1 2 1 4 4 30 63 3 1 4 5 1 1 2 12
GSP 2 4 20 4 3 5 1 2 5 2 1 10
GUM 9 2 6 6 3 6 1
GYX 1 1 1 1 4 3 19 1 3 5 6 11 1 25 1 1 3 1 6 1 1 4 1 4 4 11
HEB 1 1
HFO 76 4 13 1 2 2 6 95 10 3 14 2 5 14 3 2 7
HGX 5 1 1 14 2 2 2 4 5 15 17 18 2 2 2 1 3
HNX 2 1 16 2 3 1 1 1 6 1 1 3
HUN 1 4 1 2 6 6 1 3 3
ICT 3 3 4 1 4 1 10
ILM 3 1 6 3 1 1 1 4 7 14 4 1 2 2
ILN 3 5 16 6 2 26 3 3 3 5 1 2 10
ILX 2 5 1 4 11 2 4 1 10
IND 2 2 2 69 1 5 1 1 6
IWX 2 5 1 3 29 3 4 2 9 1 1 4 1 3 2 13
JAN 8 2 12 2 24 4 1 16 3 3 1 1 1 1 2
JAX 3 14 14 4 3 5 7 1 2 5 8 4 15 1 12 1 4 2 1 1 1
JKL 5 8 12 1 13 30 2 2 3 9
JSJ 3 3 1 2 1 1 15 14 5 6
KEY 1 2 2 17
LBF 1 1 1 3 3 5 4 2 7
LCH 5 12 3 12 10 35 1 2 8 9 8 15 10 2 3 6 3 5 1
LIX 6 2 1 6 18 1 10 1 1 8 43 9 12 1 1 3 2
LKN 2 4 1 1 8 1
LMK 3 14 7 10 2 25 5 16 6 4 2 1 1 3 8
LOT 1 2 1 7 18 41 23 12 13 1 1 6 20 2 1 3 2 1 13
LOX 3 5 1 4 11 7 2 3 3 5 5 6 2 3 2 3 2 23 1 7 6 14 1 1 4
LSX 2 1 3 1 5 14 1 1 2 11
LUB 1 6 6 2 2 1 6 2
LWX 1 1 7 3 3 1 7 11 38 1 2 1 7 2 1 3 10
LZK 2 24 30 5 20 4 1 2 24 4 5 1 1 7 1
MAF 2 2 4 2 6 7 5 2
MEG 1 14 5 14 9 48 8 1 23 5 17 4 3 1 2 4 1
MFL 4 1 3 3 1 1 1 13 9 1 1 3
MFR 1 6 1 3 4 5 9 6 7 23 3 16 1 2 4 1 5 19 12 5 8 12
MHX 2 1 1 2 1 8 1 1 11 13 22 1 1 1 3 4 1 3 3
MKX 1 4 1 9 7 26 1 3 1 4 22 1 4 1 2 2 12
MLB 7 1 1 3 4 1 4 5 1 2 1 4 1 5 1 15 1 2 3 1
MOB 1 3 7 11 1 1 4 5 39 16 4 13 1 4 2 4 1 1
MPX 1 1 1 12 1 3 3 9
MQT 8 15 1 17 8 2 1 3 6 15
MRX 2 12 15 8 1 6 6 8
MSO 2 1 2 1 1 4 10 28 1
MTR 1 1 1 1 1 2 1 3 1 1 6 28 1 1 1 2 1
OAX 1 1 1 2 2 3 3 12
OHX 2 18 4 4 41 13 6 4 2 1 2 5
OKX 1 5 3 2 1 10 5 6 4 3 1 5 20 1 1 2 1 4 4 9
OTX 1 1 1 4 6 5 15
OUN 2 2 3 3 6 7 1 1 5 1 4 5
PAH 1 11 5 6 4 28 1 11 5 7 1 2 1 3 8
PBZ 4 18 11 36 34 3 1 1 1 5 2 3 11
PDT 2 2 2 1 9 2 5 14
PHI 1 2 2 10 19 4 4 6 7 2 10 5 25 1 1 1 4 4 1 1 2 2 3 4 10
PIH 1 6 1 2 14 1
PQR 1 6 8 16 2 4 31 5 29 1 3 2 24 2 4 19
PSR 3 3 2 5
PUB 3 5 1 4 4 5 13
RAH 5 2 1 1 3 1 1 2 4
REV 1 1 7 2 2 2 7
RIW 6 9 2 4 6 11
RLX 6 43 27 1 1 1 7 1 3 10
RNK 1 3 11 1 1 4 1 2 1 7 3 1 10
SEW 1 1 3 4 14 13 21 1 3 10 48 1 1 3 8 6 7 6 17
SGF 2 11 5 1 3 16 1 2 8 3 3 4 10
SGX 1 7 1 1 6 5 2 2 3 3 3 1 3 5 2 1 7 1 1 2
SHV 7 18 1 26 3 35 5 11 19 4 17 3 1 1 3
SJT 1 3 2 1 2 2 1 1 6
SLC 1 3 2 2 7
STO 2 1 5 1 1 1 1 2 5 3 7
TAE 1 6 12 1 6 7 2 2 5 18 4 24 7 7 6 5 1 2
TBW 9 9 8 5 4 1 9 4 7 1 1 4 1
TFX 4 1 1 1 4 12 10 5 79
TOP 1 2 1 1 2 1 14
TSA 2 4 7 2 3 14 10 1 1 7 1 3 1 3 8
TWC 2 1 3 3 2 2 2 1
UNR 1 1 8 2 3 4 8
VEF 4 1 1 2 1 1 8 1 2 2