1. NWS Resources
  2. Max VTEC EventID Listing

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

Select Year:

Max VTEC ETN listing for 2025

Table generated at: 2025-04-23T22:15:08Z

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 47 23 2 1 1 2 23 21 1 1 10 12 6 24 7 8 13 4
ABR 1 9 1 6 2 6 11 2 3 1 12 3 2 9
AFC 40 7 1 1 3 4 2 1 13 1 3 330 3 4 8 363 75 2 51 6 6 35
AFG 241 27 1 1 2 99 7 9 2 20 6 26 19 22 9 66
AJK 5 1 2 1 12 125 4 5 264 9 2 5 14 17
AKQ 1 7 1 10 7 2 20 2 1 1 1 12 13 1 5 30 12 63 139 50 56 6 2 2 5 5 8
ALY 5 1 3 8 1 2 1 4 10 2 13 8 4 23
AMA 5 2 4 2 2 1 6 1 13 17 1 4 6 10 159 9 8 1 3 10 2
APX 2 3 5 19 1 1 5 49 4 6 4 10 32
ARX 2 10 1 2 2 4 5 2 1 140 20 5 4 4 11
BGM 5 2 3 1 2 1 1 1 1 7 37 55 15 2 11 8 4 21
BIS 1 17 1 7 1 2 3 4 2 1 1 10 1 2 9
BMX 5 1 3 4 40 13 6 22 3 1 2 2 136 104 132 42 6 2 2 3 1
BOI 3 2 1 4 1 6 3 1 1 11 2 2 10
BOU 2 3 1 2 2 4 9 15 3 5 5 5 22
BOX 2 1 3 3 7 12 21 1 2 4 57 2 1 1 1 5 9 3 3 11
BRO 2 6 1 1 1 3 16 17 4 2 4 5 4 5 2 4 30 12 18 31 6 31 6 12 3 1 2
BTV 1 6 1 6 7 2 3 1 16 2 1 15 3 5 14
BUF 3 3 6 1 2 1 1 6 11 1 2 1 8 1 1 14 46 3 55 14 2 1 11 10 3 26
BYZ 9 3 1 1 1 8 10 12 11 12 25
CAE 3 3 2 6 1 1 2 12 89 28 133 8 3 1 2 4
CAR 9 1 9 2 1 12 22 48 7 1 1 1 1 10 6 3 4 15
CHS 4 2 8 7 2 1 1 1 8 9 14 18 12 1 35 4 89 22 133 3 4 1 1 1
CLE 2 1 1 1 7 13 2 17 2 4 1 1 4 5 13 1 23 2 105 30 103 1 1 8 4 1 17
CRP 5 10 2 1 2 2 16 4 4 9 4 9 3 5 15 23 8 29 8 7 1 1 1
CTP 1 4 1 1 2 6 5 1 1 1 1 2 17 26 54 6 8 6 3 18
CYS 1 5 1 2 2 6 7 28 29 11 3 7 10 27 4
DDC 2 6 2 2 2 1 6 9 15 3 3 163 13 4 4 9
DLH 1 12 2 4 3 12 19 1 2 3 56 5 2 5 6 11 8 10 28
DMX 3 10 1 3 2 3 4 2 5 3 140 55 141 2 7 4 2 12
DTX 2 1 1 2 6 13 18 5 11 1 35 75 18 2 5 6 2 2 8
DVN 8 1 2 1 1 2 2 5 2 35 37 155 9 7 2 2 10
EAX 2 4 1 1 1 7 1 3 4 14 4 8 2 2 3 5 92 63 154 8 6 4 3 10
EKA 11 14 1 5 1 7 1 4 2 15 1 6 19 22 2 3 12 51 4 16 3 16 6 9 10
EPZ 9 74 22 19 1 3 17 19 1 6 6 3 17 2 5 1
EWX 6 1 2 1 4 7 6 8 1 161 59 151 1 8 1 1 3
FFC 7 1 1 3 4 6 103 5 2 5 4 4 1 137 120 133 29 8 2 2 3 1
FGF 3 19 1 6 1 1 3 2 3 4 6 3 4 15
FGZ 1 4 1 1 9 1 3 9
FSD 3 13 2 6 3 7 14 2 3 140 15 12 3 1 14
FWD 4 1 1 3 4 10 16 7 30 1 4 8 1 1 1 2 161 152 152 22 6 1 1 3 1
GGW 1 14 1 6 2 2 5 2 1 3 4 7 5 2 3 13
GID 2 5 1 1 1 1 1 11 19 3 4 4 92 17 141 4 3 6
GJT 3 1 1 2 1 2 3 4 6 7 10 5 6 18
GLD 2 6 3 3 6 2 3 6 12 14 3 4 163 6 2 3 2 11
GRB 6 2 10 3 13 1 1 2 45 7 1 4 4 6 15 1
GRR 2 3 1 1 6 8 16 8 46 1 73 13 6 1 2 8 1 1 14
GSP 5 1 2 17 4 3 1 1 6 2 2 2 2 1 137 30 130 3 12 3 3 8
GUM 1 2 4 6 5 12 30 24
GYX 1 1 10 1 1 3 5 6 1 9 22 1 47 8 1 1 1 1 8 13 4 4 16
HEB 1
HFO 4 51 12 1 2 1 2 67 23 7 22 3 8 10 1 1 2
HGX 1 1 2 7 2 2 1 19 1 22 1 3 5 2 4 6 11 30 32 5 36 77 27 123 12 1 1 1
HNX 3 20 2 9 5 6 5 9 9 2 24 5 7 6
HUN 4 1 3 12 16 2 12 1 2 2 136 83 128 31 8 1 1 3
ICT 2 3 1 1 1 1 4 3 4 6 1 1 3 3 160 46 93 6 6 4 4 8
ILM 5 5 5 3 3 4 1 2 2 5 33 6 3 31 1 5 134 16 51 1 3 2 1 3
ILN 2 1 3 15 24 9 3 53 3 2 1 2 4 5 138 72 103 25 6 3 2 13
ILX 7 1 1 2 3 4 4 2 7 2 1 4 1 3 89 158 39 8 2 2 6
IND 2 1 2 20 9 1 10 2 78 1 1 3 59 85 103 33 5 1 1 8
IWX 1 1 1 1 2 4 26 7 11 1 6 2 34 75 48 103 11 1 2 3 2 11
JAN 5 3 1 23 10 52 5 1 136 213 129 86 8 2 2 3 1
JAX 8 1 15 16 9 15 1 1 15 18 6 7 40 10 13 25 1 89 45 133 12 7 1 1 2
JKL 6 5 26 49 33 30 56 3 3 2 2 1 138 95 126 20 8 4 5 10
JSJ 2 7 77 5 1 19 23 11 1
KEY 2 1 14 8 22 1
LBF 2 8 1 3 3 2 14 19 3 4 5 2 3 2 7
LCH 2 2 6 9 1 1 2 3 16 21 9 46 1 1 4 4 1 1 11 25 19 28 83 59 127 15 16 1 1
LIX 1 1 6 9 1 1 1 22 20 16 17 1 2 3 4 7 1 2 50 17 30 84 61 129 28 9 1 1 1
LKN 1 1 4 3 2 2 15 4 4 9
LMK 4 6 35 29 53 73 9 2 2 2 1 138 131 124 48 5 4 4 8 1
LOT 6 1 1 1 1 8 2 2 2 1 2 2 12 17 1 1 1 7 3 53 1 1 35 28 157 11 1 10 1 6
LOX 5 2 3 32 1 12 12 11 4 3 3 11 14 21 9 12 25 68 1 1 17 4 43 2 3 5
LSX 6 1 2 10 11 10 3 35 1 1 7 2 2 1 1 143 106 155 53 5 3 4 7
LUB 4 2 4 2 2 5 3 15 18 3 5 2 159 31 1 8 1 2 6 1
LWX 1 5 11 1 1 3 3 1 2 2 2 2 3 2 2 12 15 2 3 3 33 1 74 9 1 139 37 54 1 2 14 9 6 18
LZK 6 1 3 1 4 16 52 7 63 8 2 4 1 143 212 156 97 7 2 2 5 1
MAF 9 36 4 3 13 2 2 2 3 16 20 1 1 19 24 162 60 2 17 1 2
MEG 5 3 3 1 4 23 33 67 4 80 24 2 3 136 188 158 139 8 2 2 2 3
MFL 2 11 3 11 4 3 1 1 44 6 21 23 2 14 2 1
MFR 4 7 1 6 2 3 5 5 7 17 3 13 8 17 4 7 44 6 27 2 3 2 2 15 6 11 17 7
MHX 8 3 8 1 3 3 1 1 1 1 13 21 34 7 40 2 4 134 24 56 6 3 2 5
MKX 6 1 1 2 2 15 20 1 9 4 53 2 142 28 2 1 4 7 1 1 6
MLB 13 5 5 11 3 4 7 1 4 2 5 51 3 12 30 1 28 8 8
MOB 3 7 2 3 8 10 14 17 25 1 4 6 48 14 14 30 3 8 86 52 132 22 6 1 1
MPX 3 8 3 4 1 1 1 1 140 7 7 5 5 14
MQT 2 1 3 1 3 11 15 33 1 4 1 3 84 3 1 16 9 5 8 28 1
MRX 4 1 1 3 17 10 13 1 19 3 1 8 4 5 137 62 130 17 11 3 4 9
MSO 1 3 1 1 1 1 3 4 4 6 29
MTR 9 3 4 8 43 2 11 4 32 1 10 3 12 1 1 23 3 57 1 1 4 14 12
OAX 3 8 1 1 3 1 1 2 2 1 9 15 3 4 92 47 141 10 6 4 3 15
OHX 4 4 27 60 3 34 94 1 135 135 128 62 6 2 2 4
OKX 10 2 7 2 1 1 11 14 1 4 9 9 48 1 1 1 4 2 2 9
OTX 1 2 2 1 2 2 6 2 4 1 1 1 1 5 2 7 22
OUN 4 2 1 2 1 2 8 8 9 1 4 5 7 11 1 1 3 3 160 148 152 39 10 2 2 7 1
PAH 5 3 29 13 52 1 62 1 1 3 1 2 1 135 186 158 110 8 3 3 5 2
PBZ 1 6 1 1 3 17 1 1 5 8 3 1 1 1 1 2 3 17 138 62 53 9 9 7 6 17
PDT 1 1 1 3 1 4 1 1 1 3 9 2 8 21 9
PHI 3 5 1 8 1 3 2 1 1 1 1 12 18 1 1 4 16 8 57 3 1 18 3 3 12 4 3 12 1
PIH 3 5 2 12 5 7 16
PQR 1 8 2 12 1 2 2 2 1 7 5 8 4 1 2 9 16 1 1 1 1 51 2 11 2 3 1 1 65 4 2 2 5 8 18 2
PSR 5 3 4 2 3 3 3 8 1 17 3
PUB 2 4 2 1 2 2 3 2 19 25 7 11 3 163 2 9 9 19
RAH 5 12 3 2 7 3 1 2 1 1 1 134 64 56 4 3 2 3 7
REV 1 1 1 2 4 1 4 3 18 13 8 7 12
RIW 2 1 1 1 1 1 8 10 1 5 10 21
RLX 15 1 2 7 56 22 1 2 38 2 1 3 2 3 1 2 1 138 124 53 19 8 6 9 14
RNK 13 2 2 5 17 23 1 7 3 18 2 1 4 1 1 2 1 1 138 27 56 3 12 5 7 14
SEW 1 6 8 2 12 3 6 11 1 1 1 1 55 1 1 1 1 65 6 2 6 14
SGF 3 1 3 10 15 13 4 12 29 3 2 9 2 2 1 3 1 153 139 154 46 6 2 3 6
SGX 5 2 18 4 11 4 5 3 3 2 3 4 14 15 4 12 3 3 8
SHV 6 3 12 30 4 74 1 2 112 182 154 72 8 2 1 3 1
SJT 5 6 4 1 1 8 7 5 1 1 6 10 1 1 1 2 159 91 151 13 6 2
SLC 1 1 1 5 12 5 6 19
STO 3 1 10 4 13 1 1 3 3 12 5 9 6
TAE 1 12 2 2 24 4 25 8 2 9 5 6 57 18 32 27 7 89 88 133 21 4 1 1
TBW 7 2 16 3 1 6 5 10 1 32 18 13 14 1 3 52 10 1
TFX 2 17 3 8 2 9 5 13 17 12 10 35
TOP 3 3 1 1 2 4 5 3 3 1 4 8 2 2 3 4 92 59 93 6 7 6 3 7
TSA 6 1 1 3 4 34 13 7 22 7 1 4 5 1 1 1 1 143 120 154 20 8 3 2 6 1
TWC 3 11 5 7 7 10 2 6 10 3
UNR 9 1 4 2 8 9 4 3 2 19 4 4 14
VEF 1 2 1 1 3 5 1 17 4 5 5