List of SPC High Risk days
From Wikipedia, the free encyclopedia
The following days had a declaration of 'High Risk' of severe weather in a certain part of the United States according to the Storm Prediction Center.
Busts indicate days that a severe weather outbreak was expected but never materialized, with little or no severe activity. Limited details are available for days before the late 1990s.
The only month that has not recorded a known High Risk day is September. No High Risk has ever been issued west of the Rocky Mountains.
| Date | Area | Results | Notes |
|---|---|---|---|
| May 7, 1988 | Oklahoma | Busted | |
| November 15, 1989 | Southern U.S. | Tornado outbreak produced 18 tornadoes, killed 21 | |
| March 13, 1990 | Central U.S. | Tornado outbreak produced 56 tornadoes, killed 2 | Unconfirmed risk level |
| June 2, 1990 | Ohio Valley | Tornado outbreak produced 88 tornadoes, killed 9 | |
| April 11, 1991 | Kansas | Busted | |
| April 12, 1991 | Kansas, Oklahoma, Texas | Moderate tornado/hail event | First known back-to-back High Risk days |
| April 26, 1991 | Kansas, Oklahoma | Tornado outbreak produced 58 tornadoes, killed 24 | |
| April 28, 1991 | Kansas | Busted; only a few tornadoes and severe reports | |
| June 7, 1993 | Upper Midwest | Tornado outbreak produced ~40 tornadoes, no deaths | |
| March 27, 1994 | Southern U.S. | Tornado outbreak produced 26 tornadoes, killed 42 | |
| April 25, 1994 | Central U.S. | End of tornado outbreak sequence that produced 29 tornadoes and many hail reports, killed 3 | |
| August 27, 1994 | Upper Midwest | Small tornado outbreak produced 12 tornadoes, killed 4 | Only High Risk ever issued in August |
| November 27, 1994 | Southern U.S. | Tornado outbreak produced 19 tornadoes, killed 6 | |
| April 17, 1995 | Oklahoma, Texas | Primarily a derecho, but 21 tornadoes (mostly weak) reported | |
| May 7, 1995 | Kansas, Oklahoma, Texas | First part of a tornado outbreak sequence that produced 32 tornadoes, killed 3 | |
| May 12, 1995 | Kansas | Second part of the same tornado outbreak sequence although mostly a bust | |
| May 13, 1995 | Ohio Valley | Continuation of the same tornado outbreak sequence with 27 tornadoes and a long derecho; killed 3 | |
| May 17, 1995 | Kansas | Continuation of the same tornado outbreak sequence although again mostly a bust with only 8 tornadoes and few other reports | |
| April 19, 1996 | Illinois, Indiana | Tornado outbreak with 74 tornadoes (plus more the next day); killed 1 | |
| May 26, 1996 | Kansas, Oklahoma | Small tornado event became a mini-derecho | |
| May 2, 1997 | Mississippi, Alabama | Progressive derecho that also produced 8 tornadoes; killed 1 | |
| July 1, 1997 | Upper Mississippi Valley | Moderate tornado outbreak reorganized into a progressive derecho | |
| February 10, 1998 | Texas, Louisiana | Rare winter serial derecho | Only High Risk ever issued in February |
| April 8, 1998 | Alabama | Tornado outbreak with 15 tornadoes (mostly in more urbanized areas) plus widespread wind and hail; killed 41 | |
| April 15, 1998 | Middle Mississippi Valley | First phase of a two-day tornado outbreak with 23 tornadoes; killed 4 | |
| April 16, 1998 | Tennessee | Second phase of a two-day tornado outbreak with 38 tornadoes including the Nashville Tornadoes of 1998; killed 8 | |
| May 31, 1998 | Northeastern U.S. | Major derecho and tornado outbreak with 39 tornadoes and enormous wind damage; killed 7 | Only High Risk ever issued in the Northeast |
| June 14, 1998 | Ohio Valley | Small tornado event with 22 mostly weak tornadoes followed by a progressive derecho | |
| January 21, 1999 | Arkansas | Tornado outbreak with 99 tornadoes; killed 9 | Only High Risk ever issued in January |
| March 8, 1999 | Arkansas, Louisiana | Generally a bust; few tornadoes with some scattered hail and wind | |
| April 8, 1999 | Iowa, Missouri, Illinois | Tornado outbreak with 56 tornadoes; killed 6 | |
| May 3, 1999 | Oklahoma, Kansas | Tornado outbreak with 77 tornadoes; killed 46 | |
| May 4, 1999 | Oklahoma, Arkansas, Texas | Second day of the same tornado outbreak with 39 tornadoes; killed 1 | |
| May 5, 1999 | Southern U.S. | Third day of the same tornado outbreak with 18 tornadoes plus a significant serial derecho; killed 3 | First and only occurrence of three consecutive High Risk days |
| June 5, 1999 | South Dakota, Nebraska | Mostly a bust; isolated tornadoes and scattered wind and hail damage | |
| April 6, 2001 | Oklahoma, Kansas | Serial derecho with widespread wind damage | |
| April 11, 2001 | Iowa, Illinois, Wisconsin | Tornado outbreak with 40 tornadoes; killed 1 | |
| June 11, 2001 | Minnesota, Wisconsin | Progressive derecho with widespread wind damage | |
| October 13, 2001 | U.S. Gulf Coast | Localized tornado event with 13 tornadoes | |
| October 24, 2001 | Midwest and Southern U.S. | Tornado outbreak with 14 tornadoes plus a major serial derecho; killed 3 | |
| April 16, 2002 | Minnesota | Busted | |
| July 31, 2002 | Minnesota, Wisconsin | Busted | |
| November 10, 2002 | Midwest and Southern U.S. | Tornado outbreak with 76 tornadoes and extensive wind damage; killed 36 | |
| December 23, 2002 | Texas | Localized tornado event with 14 tornadoes | Only High Risk ever issued in December |
| April 6, 2003 | Texas, Louisiana, Mississippi | Localized tornado event with 13 tornadoes | |
| May 4, 2003 | Central U.S. | Day 5 of a tornado outbreak sequence with 86 tornadoes; killed 38 | |
| May 5, 2003 | Southern U.S. | Day 6 of a tornado outbreak sequence with 22 tornadoes but no deaths | |
| May 8, 2003 | Kansas, Oklahoma | Day 9 of a tornado outbreak sequence with 42 tornadoes but no deaths | |
| May 10, 2003 | Central U.S. | Day 11 of a tornado outbreak sequence with 60 tornadoes but no deaths | |
| May 15, 2003 | Texas, Oklahoma | Widespread tornadoes (unknown number) but mostly weak and in open country | |
| March 4, 2004 | Texas | Isolated tornadoes reorganized into a large serial derecho | |
| May 22, 2004 | Nebraska, Iowa | Tornado outbreak with 40+ tornadoes; killed 1 | |
| May 24, 2004 | Nebraska, Iowa | Hybrid derecho/tornado outbreak with ~30 tornadoes; killed 1 | |
| May 29, 2004 | Central U.S. | First day of a two-day tornado outbreak with ~60 tornadoes; killed 3 | |
| May 30, 2004 | Central U.S. | Second day of a two-day tornado outbreak with ~90 tornadoes; killed 2 | |
| April 11, 2005 | Louisiana, Mississippi | Generally a bust, but one death reported from isolated straight-line winds | |
| June 4, 2005 | Central U.S. | Moderate tornado outbreak with ~25 tornadoes and widespread wind and hail damage | |
| November 15, 2005 | Midwest and Southern U.S. | Tornado outbreak with 50 tornadoes; killed 2 | |
| March 12, 2006 | Midwest | Tornado outbreak with 48 tornadoes; killed 8 | |
| April 6, 2006 | Nebraska, Kansas | First day of a three-day tornado outbreak with 11 tornadoes; no deaths | |
| April 7, 2006 | Southern U.S. | Second day of a three-day tornado outbreak with 49 tornadoes; killed 13 | Only High Risk ever issued on Day 2 (the day before the event) |
| March 1, 2007 | Southern U.S. | Tornado outbreak with 49 tornadoes, killed 20 |
