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: 2025-05-01T08:45:03Z

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 52 26 2 1 1 1 1 7 5 26 25 1 1 11 13 6 29 175 6 25 7 8 13 4
ABR 1 9 1 6 2 6 11 2 3 1 1 13 3 2 9
AFC 42 7 1 1 3 4 2 1 13 1 3 341 3 4 8 389 76 2 51 6 6 35
AFG 257 27 1 1 2 102 7 9 2 28 6 31 20 22 9 69
AJK 5 1 2 1 13 134 4 5 282 9 2 5 14 17
AKQ 1 7 1 10 7 2 20 2 1 1 1 12 13 1 5 42 12 65 139 50 56 6 2 2 5 5 8
ALY 5 1 3 8 1 1 2 1 4 10 191 4 13 8 4 23
AMA 5 2 4 2 2 2 8 8 6 1 1 1 13 17 1 4 6 10 186 76 172 18 8 1 3 10 2
APX 2 3 1 6 21 1 1 10 53 6 7 4 10 32
ARX 2 10 1 2 2 4 6 2 1 140 26 185 2 5 4 4 11
BGM 5 2 3 1 2 1 1 1 1 1 7 37 191 33 3 12 8 4 21
BIS 1 17 1 7 1 3 3 4 2 1 1 179 11 1 2 9
BMX 5 1 3 4 40 13 7 22 3 1 2 2 136 108 132 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 5 10 16 3 5 169 21 178 3 5 5 22
BOX 3 1 3 3 7 12 22 1 2 4 59 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 19 32 6 31 6 12 3 1 2
BTV 1 6 1 6 7 1 2 3 1 16 191 3 1 15 3 5 14
BUF 3 3 6 1 2 1 1 1 6 11 1 2 1 8 1 1 19 49 3 191 23 2 1 11 10 3 26
BYZ 9 3 1 3 2 1 8 10 179 9 12 13 13 27
CAE 3 6 1 2 6 1 1 2 12 89 30 133 8 3 1 2 4
CAR 9 1 9 3 1 12 23 51 7 1 1 1 1 10 6 3 4 15
CHS 2 4 3 8 7 2 1 1 1 8 9 14 19 12 3 36 4 89 27 133 3 4 1 1 1
CLE 2 1 1 1 8 16 2 2 19 2 4 1 1 4 5 15 1 25 2 191 40 103 1 1 1 8 4 1 17
CRP 5 10 2 1 2 2 16 4 4 9 4 9 3 5 15 23 8 30 12 7 1 1 1
CTP 1 4 1 1 2 6 6 1 1 1 1 2 17 191 35 54 6 9 6 3 18
CYS 1 5 1 2 6 6 7 28 29 11 5 178 7 10 27 4
DDC 2 6 2 2 2 2 9 10 16 3 3 170 47 1 4 4 9
DLH 1 12 2 4 1 3 12 20 1 2 2 4 57 5 2 8 181 1 6 12 8 10 28
DMX 3 10 1 3 2 1 3 4 2 5 3 140 84 183 5 8 4 2 12
DTX 2 1 1 2 2 2 6 2 13 19 5 15 1 38 75 21 2 5 7 2 2 8
DVN 8 1 2 1 1 2 2 1 2 5 2 35 38 155 9 7 2 2 10
EAX 2 4 1 1 1 7 3 3 4 15 4 8 2 2 3 5 92 71 183 8 6 4 3 10
EKA 11 14 1 5 1 7 1 4 2 15 1 6 20 24 2 3 12 52 4 17 3 16 6 9 10
EPZ 9 83 24 20 1 3 19 21 1 7 7 3 18 2 5 1
EWX 6 1 2 1 6 7 6 8 1 166 72 151 1 8 1 1 3
FFC 7 1 1 3 5 6 103 5 2 5 4 4 1 137 134 133 29 8 2 2 3 1
FGF 3 19 1 6 1 1 3 2 3 4 7 3 4 15
FGZ 3 6 1 1 11 1 3 9
FSD 3 13 2 6 3 7 14 2 3 184 34 180 1 12 3 1 14
FWD 4 1 1 4 6 16 35 8 48 1 4 8 1 1 1 2 202 186 198 24 6 1 1 3 1
GGW 1 14 1 6 2 2 6 2 1 1 3 4 7 8 2 3 13
GID 2 5 1 1 4 1 1 11 20 3 4 4 92 22 141 4 3 6
GJT 3 1 1 2 1 2 5 7 6 7 11 5 6 18
GLD 2 6 3 3 6 2 3 7 13 16 3 4 169 19 2 3 2 11
GRB 6 2 12 3 13 1 4 2 48 15 185 2 1 4 4 6 15 1
GRR 2 3 1 1 6 2 1 1 8 16 9 49 1 73 13 6 1 2 9 1 1 14
GSP 5 1 2 17 4 3 1 1 6 2 2 2 2 1 137 38 130 3 12 3 3 8
GUM 1 2 4 6 5 12 30 24
GYX 2 1 10 1 1 3 5 6 1 1 9 22 1 49 8 1 1 1 1 8 13 4 4 16
HEB 1
HFO 4 62 12 1 2 1 2 67 23 7 22 3 8 10 1 1 2
HGX 2 1 2 7 2 2 1 20 1 22 1 3 5 2 4 6 11 31 32 6 38 202 34 198 12 1 1 1
HNX 3 20 2 9 5 6 5 10 9 2 26 5 7 7
HUN 4 1 3 12 19 2 12 1 2 2 136 83 128 31 8 1 1 3
ICT 2 3 1 1 2 1 5 3 4 6 1 1 3 3 186 50 93 6 6 4 4 8
ILM 6 8 5 4 3 4 1 2 2 5 34 6 3 31 1 5 134 18 51 1 3 2 1 3
ILN 2 1 3 15 30 10 3 53 3 2 1 2 4 5 192 96 103 26 6 3 2 13
ILX 7 2 1 2 3 4 5 2 8 2 1 4 1 3 189 98 200 42 8 2 2 6
IND 2 1 2 24 12 1 13 2 78 1 1 3 189 105 200 35 5 1 1 8
IWX 1 1 1 1 2 4 26 1 7 11 1 6 2 36 75 48 103 11 1 2 3 2 11
JAN 5 3 1 26 13 52 5 1 201 220 129 86 8 2 2 3 1
JAX 8 1 1 21 16 9 15 1 1 15 18 6 7 42 10 14 25 1 89 48 133 12 7 1 1 2
JKL 6 5 26 49 33 30 56 4 3 2 2 1 193 112 126 20 8 4 5 10
JSJ 2 1 14 147 24 1 20 23 11 1
KEY 2 1 15 8 26 1
LBF 2 8 1 3 3 2 14 19 3 4 5 13 178 11 3 2 7
LCH 2 2 6 9 1 1 2 3 22 21 9 50 1 1 4 4 1 1 11 25 19 29 83 61 127 16 16 1 1
LIX 1 1 6 9 1 1 1 26 22 16 17 1 2 3 4 7 1 2 51 17 30 84 66 129 28 9 1 1 1
LKN 1 1 4 3 2 2 16 4 4 9
LMK 4 6 35 35 53 73 9 2 2 2 1 193 153 124 48 5 4 4 8 1
LOT 6 1 1 1 1 8 2 2 2 1 2 2 13 18 1 1 1 7 3 56 1 1 35 28 157 11 1 10 1 6
LOX 6 2 3 32 1 12 12 11 4 3 3 11 14 21 9 12 25 72 1 1 17 4 44 2 3 6
LSX 6 1 2 10 14 12 3 36 1 1 7 2 2 1 1 187 114 200 60 5 3 4 7
LUB 4 2 4 2 2 2 1 6 24 3 1 15 18 3 5 2 195 120 182 23 8 1 2 6 1
LWX 1 5 11 1 1 3 3 1 2 2 3 2 3 2 2 12 16 2 3 3 40 1 78 9 1 139 38 54 1 2 14 9 6 18
LZK 6 1 3 1 5 16 59 8 64 8 2 4 1 201 233 199 99 7 2 2 5 1
MAF 9 40 4 4 13 2 2 10 3 16 21 1 1 19 25 195 153 182 5 18 1 2
MEG 5 3 3 1 4 23 39 68 5 80 30 2 3 201 193 158 139 8 2 2 2 3
MFL 2 11 3 11 4 3 1 1 45 6 22 23 2 14 2 1
MFR 4 7 1 6 2 3 5 5 7 17 3 13 8 17 4 7 46 6 28 2 3 2 2 15 6 11 17 7
MHX 10 3 8 1 4 3 1 1 1 1 13 21 34 7 42 2 4 134 25 56 6 3 2 5
MKX 6 1 1 2 4 16 21 1 9 4 55 2 142 28 2 1 4 7 1 1 6
MLB 13 5 5 11 3 4 7 1 4 2 5 51 3 14 30 1 28 8 8
MOB 3 7 2 3 8 10 14 20 25 1 4 6 48 14 14 30 3 8 86 58 132 22 6 1 1
MPX 3 8 3 4 1 1 1 1 140 19 181 12 7 5 5 14
MQT 2 1 3 1 2 3 15 17 35 1 4 12 3 89 3 3 16 9 5 8 28 1
MRX 4 1 1 3 17 11 14 2 19 3 1 8 4 5 137 68 130 17 11 3 4 9
MSO 1 3 1 1 1 2 3 4 4 6 30
MTR 9 3 4 8 43 2 12 4 32 1 10 3 12 1 1 23 4 60 1 1 4 14 12
OAX 3 8 1 1 3 1 1 4 2 2 1 9 16 3 4 184 55 183 15 6 4 3 15
OHX 4 4 30 63 3 34 94 1 135 135 128 62 6 2 2 4
OKX 11 2 7 2 1 1 11 14 1 4 11 9 50 1 1 1 1 4 2 2 9
OTX 1 2 2 1 2 3 6 2 4 2 1 1 1 5 2 7 22
OUN 4 2 1 2 4 14 46 55 9 9 33 37 7 11 1 1 3 3 196 276 194 84 10 2 2 7 1
PAH 5 3 29 16 52 1 62 1 1 3 1 2 1 201 199 200 111 8 3 3 5 2
PBZ 1 6 1 1 3 18 3 1 5 8 3 1 1 1 1 2 3 17 191 76 53 11 9 7 6 17
PDT 1 1 1 3 1 4 1 2 1 3 11 2 8 21 9
PHI 3 5 1 8 1 3 2 1 1 1 1 12 18 1 1 4 22 8 59 3 1 22 4 3 13 4 3 12 1
PIH 3 5 2 1 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 57 2 11 2 3 1 1 65 4 2 2 5 8 18 2
PSR 5 3 4 2 3 3 3 8 1 18 3
PUB 2 4 2 1 2 2 3 3 23 29 7 11 3 169 11 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 13
RIW 2 1 2 1 1 1 8 10 1 1 5 10 22
RLX 15 1 2 7 56 22 1 2 38 3 1 3 2 3 1 2 1 193 136 53 21 8 6 9 14
RNK 13 2 2 5 17 26 1 8 3 18 2 1 4 1 1 2 1 1 138 28 56 3 12 5 7 14
SEW 1 6 8 2 12 3 6 11 1 1 1 1 59 1 1 1 1 65 6 2 6 14
SGF 3 1 4 11 20 16 4 12 38 8 2 9 2 2 1 4 1 187 151 154 53 6 2 3 6
SGX 6 2 18 4 11 4 5 3 3 2 3 4 14 15 4 13 3 3 9
SHV 6 4 3 13 35 4 82 1 2 202 210 198 74 8 2 1 3 1
SJT 5 6 4 1 1 2 19 10 5 2 1 6 10 1 1 1 2 195 128 194 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 7
TAE 1 12 2 2 26 4 28 8 2 9 5 6 57 18 37 27 7 89 93 133 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 13 11 36
TOP 3 3 1 1 2 6 11 3 4 1 4 8 2 2 3 4 92 93 183 7 7 6 3 7
TSA 6 1 1 4 9 50 17 8 33 9 1 4 5 1 1 1 1 196 165 197 37 9 3 2 6 1
TWC 3 11 5 8 9 11 2 6 10 3
UNR 9 1 4 3 8 9 4 3 2 179 11 178 21 4 4 14
VEF 1 2 1 1 3 5 3 1 18 4 5 6