A Pacific storm is bringing areas of low elevation rain, moderate to heavy mountain snow, and high winds to the Northwest. Strong Santa Ana winds and very dry conditions are producing elevated to critical fire weather conditions in southern California. Isolated strong to severe thunderstorms are possible through early Wednesday morning across parts of northeast Texas into western Tennessee. Read More >
| SVR/TOR Warnings | Flash Flood | Tornadoes | Winter Storms | High Wind |
SVR (severe thunderstorm warnings): The number of severe thunderstorm warnings issued.
TOR (tornado warnings): The number of tornado warnings issued.
TOTAL (total of severe and tornado warnings): The total number of severe thunderstorm and tornado warnings combined.
FFW (flash flood warnings): The number of flash flood warnings.
WARN (warnings): The number of warnings issued.
VERIF (verification): The number of warnings that verified.
EVENTS (events): Total number of actual severe weather events.
UNWARN (unwarned): The number of unwarned events.
WATCH (watches): The number of watches that were in effect before warnings were issued.
FAR (false alarm ratio): The percentage of warnings where the particular weather event did not occur.
POD (probability of detection): The percentage of events that were warned for and the conditions occured.
CSI (critical success index): The number of warned events divided by the sum of the total number of events and the number of the unverified counties.
LT (lead time): The average lead time before the first reported instance of the particular event.
SVR/TOR Warnings
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| 1994 | 133 | 36 | 169 | 166 | .503 | .620 | .381 | 12.1 |
| 1995 | 125 | 9 | 134 | 104 | .590 | .606 | .324 | 13.2 |
| 1996 | 89 | 5 | 94 | 76 | .436 | .868 | .519 | 18.2 |
| 1997 | 224 | 36 | 260 | 204 | .388 | .882 | .565 | 21.9 |
| 1998 | 330 | 52 | 382 | 386 | .343 | .904 | .614 | 27.1 |
| 1999 | 125 | 16 | 141 | 131 | .362 | .924 | .606 | 23.6 |
| 2000 | 240 | 14 | 254 | 260 | .276 | .919 | .681 | 22.4 |
| 2001 | 184 | 14 | 198 | 216 | .228 | .931 | .730 | 19.1 |
| 2002 | 170 | 28 | 198 | 214 | .192 | .879 | .727 | 17.4 |
| 2003 | 118 | 8 | 126 | 135 | .254 | .859 | .665 | 15.4 |
| 2004 | 165 | 27 | 192 | 191 | .375 | .848 | .562 | 19.9 |
| 2005 | 132 | 22 | 154 | 172 | .305 | .779 | .580 | 14.9 |
| 2006 | 211 | 6 | 217 | 243 | .226 | .901 | .714 | 18.8 |
| 2007** | 226 | 17 | 243 | 261 | .347 | .808 | .565 | 16.3 |
| 2008 | 168 | 26 | 194 | 318 | .428 | .792 | .497 | 18.7 |
| 2009 | 78 | 24 | 102 | 158 | .363 | .876 | .585 | 21.7 |
| 2010 | 114 | 11 | 125 | 213 | .312 | .749 | .559 | 17.2 |
| 2011 | 104 | 23 | 127 | 246 | .252 | .845 | .658 | 17.2 |
| 2012 | 124 | 3 | 127 | 226 | .220 | .780 | .639 | 14.4 |
| 2013 | 123 | 21 | 144 | 164 | .451 | .767 | .470 | 15.7 |
| 2014 | 136 | 5 | 141 | 203 | .369 | .837 | .562 | 18.9 |
** Storm Based Warnings began 10/1/2007
Flash Flood
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| 1997 | 14 | 8 | .357 | 1.000 | .643 | 18.8 |
| 1998 | 48 | 32 | 0 | 1.000 | 1.000 | 31.3 |
| 1999 | 38 | 18 | .447 | .778 | .477 | 54.0 |
| 2000 | 76 | 45 | .092 | 1.000 | .908 | 48.9 |
| 2001 | 15 | 7 | .553 | 1.000 | .467 | 41.4 |
| 2002 | 20 | 15 | .250 | .813 | .639 | 49.3 |
| 2003 | 4 | 2 | .500 | 1.000 | .500 | 0 |
| 2004 | 82 | 49 | .098 | .980 | .886 | 70.0 |
| 2005 | 9 | 7 | .222 | 1.000 | .778 | 12.7 |
| 2006 | 3 | 3 | .333 | .667 | .500 | 0 |
| 2007 | 52 | 59 | .231 | .949 | .739 | 66.8 |
| 2008 | 39 | 35 | .179 | .749 | .664 | 12.7 |
| 2009 | 15 | 20 | .200 | .863 | .710 | 68.9 |
| 2010 | 30 | 23 | .633 | .332 | .211 | 21.6 |
| 2011 | 22 | 13 | .591 | .671 | .341 | 54.3 |
| 2012 | 6 | 2 | .833 | .492 | .142 | 4.4 |
| 2013 | 39 | 50 | .179 | .826 | .700 | 73.2 |
| 2014 | 20 | 32 | .300 | .887 | .643 | 69.4 |
Tornadoes
| YEAR | WARN | EVENTS | UNWARN | FAR | POD | CSI | LT |
| 1994 | |||||||
| 1995 | 9 | 6 | 4 | .778 | .333 | .154 | 4.3 |
| 1996 | 5 | 2 | 1 | .800 | .500 | .167 | 11.5 |
| 1997 | 36 | 7 | 2 | .861 | .714 | .132 | 5.9 |
| 1998 | 52 | 9 | 3 | .885 | .667 | .109 | 5.6 |
| 1999 | 16 | 5 | 1 | .750 | .800 | .235 | 22.4 |
| 2000 | 14 | 6 | 3 | .786 | .500 | .176 | 9.2 |
| 2001 | 14 | 9 | 2 | .357 | .778 | .543 | 18.1 |
| 2002 | 28 | 9 | 3 | .750 | .667 | .222 | 7.8 |
| 2003 | 8 | 1 | 0 | .875 | 1.000 | .125 | 18 |
| 2004 | 27 | 20 | 7 | .593 | .650 | .334 | 13.2 |
| 2005 | 22 | 17 | 7 | .545 | .588 | .345 | 4.9 |
| 2006 | 6 | 1 | 1 | 1.000 | 0 | 0 | 0.0 |
| 2007 | 17 | 7 | 4 | .882 | .429; | .102 | 6.1 |
| 2008 | 26 | 8 | 2 | .769 | .739 | .213 | 11.7 |
| 2009 | 24 | 8 | 2 | .750 | .708 | .227 | 15.2 |
| 2010 | 11 | 9 | 4 | .545 | .436 | .286 | 7.1 |
| 2011 | 23 | 14 | 2 | .565 | .728 | .374 | 10.9 |
| 2012 | 3 | 2 | 1 | .667 | .215 | .150 | 0.2 |
| 2013 | 21 | 5 | 5 | 1.000 | 0 | 0 | 0.0 |
| 2014 | 5 | 3 | 2 | .800 | .333 | .143 | 0.3 |
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High Wind
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Last Updated 4/3/15 - tjs
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