Content-Length: 8922 | pFad | https://www.spc.noaa.gov/faq/tornado/watchver.html
This table gives some verification statistics, year-by-year, for SPC tornado watches -- based only on tornado occurrences.
YEAR | # of tornado watches | % of tornado watch with tornados | # of tornados | POD tornado in tornado watch | Tornado watch lead time | Median tornado watch area | # of F2 or greater tornados | POD F2 or greater tornados |
1970 | 220 | 31 | 653 | 21 | 2.24 | 23479 | 234 | 28 |
1971 | 274 | 40 | 889 | 33 | 2.33 | 25172 | 320 | 38 |
1972 | 181 | 43 | 737 | 22 | 2.08 | 22300 | 222 | 32 |
1973 | 379 | 45 | 1102 | 35 | 1.95 | 24307 | 386 | 49 |
1974 | 238 | 48 | 944 | 38 | 2.13 | 25330 | 339 | 54 |
1975 | 291 | 44 | 919 | 29 | 1.93 | 25362 | 236 | 35 |
1976 | 212 | 50 | 834 | 33 | 2.03 | 24243 | 231 | 44 |
1977 | 199 | 48 | 852 | 30 | 2.24 | 26145 | 182 | 40 |
1978 | 201 | 47 | 789 | 30 | 2.21 | 26190 | 128 | 41 |
1979 | 208 | 44 | 855 | 30 | 2.26 | 23832 | 150 | 46 |
1980 | 207 | 51 | 866 | 36 | 2.07 | 28398 | 199 | 44 |
1981 | 179 | 49 | 782 | 32 | 2.16 | 25885 | 179 | 45 |
1982 | 257 | 56 | 1047 | 45 | 2.51 | 28243 | 251 | 58 |
1983 | 251 | 54 | 931 | 46 | 2.31 | 27741 | 209 | 60 |
1984 | 223 | 56 | 907 | 48 | 2.1 | 28938 | 182 | 64 |
1985 | 207 | 51 | 684 | 43 | 2.56 | 29844 | 117 | 63 |
1986 | 197 | 46 | 763 | 36 | 2.21 | 25205 | 140 | 46 |
1987 | 156 | 40 | 656 | 28 | 2.31 | 25136 | 77 | 53 |
1988 | 168 | 48 | 702 | 43 | 2.5 | 25814 | 108 | 69 |
1989 | 261 | 50 | 856 | 45 | 2.44 | 24893 | 123 | 59 |
1990 | 314 | 53 | 1133 | 53 | 2.25 | 23781 | 211 | 72 |
1991 | 294 | 56 | 1132 | 51 | 2.31 | 24674 | 149 | 78 |
1992 | 348 | 52 | 1297 | 52 | 2.34 | 22696 | 186 | 75 |
1993 | 350 | 48 | 1173 | 50 | 2.33 | 24299 | 116 | 71 |
1994 | 275 | 52 | 1082 | 47 | 2.02 | 23355 | 116 | 66 |
1995 | 420 | 48 | 1234 | 61 | 2.17 | 25986 | 129 | 84 |
1996 | 479 | 48 | 1171 | 63 | 2.11 | 25317 | 114 | 72 |
1997 | 324 | 51 | 1148 | 54 | 2.14 | 24170 | 124 | 88 |
1998 | 379 | 58 | 1426 | 57 | 2.05 | 23760 | 160 | 84 |
1999 | 255 | 64 | 1343 | 57 | 1.94 | 25395 | 188 | 89 |
2000 | 226 | 60 | 1071 | 40 | 2.08 | 23607 | 85 | 76 |
NOTES: %Tor Verf is percent of all tornadoes nationwide in tornado watches. [Severe thunderstorm watches not included.] POD is probability of detection, the percentage of watches containing at least one tornado. Lead T (also "projection time") is the lead time between watch issuance and first tornado report. Median Area is the middle value of all watch areas for the year. The annual counts of reports are number of reports through time verification was calculated, and may not include reports received late.
Fetched URL: https://www.spc.noaa.gov/faq/tornado/watchver.html
Alternative Proxies: