How Often Does The Storm Prediction Center Update

A loftier risk severe weather effect is the greatest threat level issued by the Tempest Prediction Eye (SPC) for convective weather events in the United States. On the scale from one to 5, a high risk is a level 5; thus, high risks are issued merely when forecasters at the SPC are confident of a major astringent weather outbreak. This is usually for major tornado outbreaks and occasionally derechos and are typically reserved for the nearly extreme events.^[1] They are generally only issued on the day of the event. However, but ii occurrences (April 7, 2006 and April 14, 2012) of a day ii high risk are known. A loftier hazard cannot be issued on day three.^[2]

30-four loftier risks were issued in the 1980s.

Storm Prediction Center High Take a chance Events – 1982–1989^{[nb one]} Appointment Year Region Tornadoes Max rating Top gust Fatalities Outlook Notes April ii 1982 Midwest, Southern U.S. 61 F5 xxx Tornado outbreak of April 2–3, 1982 – Threescore-one tornadoes touched down; one was rated F5. The beginning e'er PDS Tornado Watch was issued on this appointment. Dec 24 1982 Southern U.S. 26 F4 three Xx-six tornadoes touched down; one was rated F4. April one 1983 Midwest, Southern U.Southward. xiii F4 2 Thirteen tornadoes touched down; one was rated F4. July 2 1983 Midwest^[3] three F1 0 Only three weak tornadoes touched downward; one was rated F1 March 27 1984 Southern U.South.^[4] 11 F1 0 Eleven weak tornadoes touched down; 6 were rated F1.^[five] March 28 1984 Southern U.S.^{[6] [7]} 24 F4 57 1984 Carolinas tornado outbreak – Twenty-four tornadoes touched down; seven were rated F4. In addition to the 57 tornadic deaths, i,249 people were injured.^[8] April 26 1984 Great Plains^[9] 28 F4 eight Twenty-eight tornadoes touched down; one was rated F4.^[10] April 29 1984 Midwest, Southern U.S.^[eleven] 42 F4 1 40-ii tornadoes touched down; ane was rated F4.^[12] May 3 1984 Southern U.S.^{[13] [fourteen]} 38 F3 5 Thirty-8 tornadoes touched downwardly; one was rated F3.^[15] October eighteen 1984 Midwest, Southern U.Due south.^[16] viii F3 2 Viii tornadoes touched downward; i was rated F3.^[17] April 21 1985 Upper Midwest^[18] 22 F3 three Twenty-two tornadoes touched down; one was rated F3.^[xix] Apr 22 1985 Southern U.S.^[20] 11 F2 0 Eleven tornadoes touched down; ii were rated F2. May 11 1985 Midwest, Southern U.S.^[21] 24 F1 0 Twenty-four weak tornadoes touched downward; 3 were rated F1.^[22] May thirteen 1985 Midwest, Southern U.Due south.^[23] 14 F2 0 Fourteen tornadoes touched downwardly; 3 were rated F2.^[24] May 30 1985 Midwest^[25] 17 F3 2 Seventeen tornadoes touched down; one was rated F3.^[26] July 4 1985 Midwest^[27] 3 F1 0 Mainly a wind and hail event.^[28] Iii weak tornadoes touched downwards; two were rated F1.^[29] March 11 1986 Southern U.S.^[30] 4 F2 0 Tornado outbreak of March 10–12, 1986 – Four tornadoes touched downward; one was rated F2.^[31] April 19 1986 Southern U.S.^[32] xiii F3 1 Fourteen tornadoes touched downward; 1 was rated F3.^[33] March 22 1987 Oklahoma, Texas^[34] 9 F3 0 Nine tornadoes touched downward; one was rated F3.^[35] May 28 1987 Texas^[36] 7 F2 0 Seven tornadoes touched down; one was rated F2.^[37] July 20 1987 Michigan^[38] 4 F0 0 Produced a derecho with damaging downburst winds.^[39] Four weak tornadoes touched downwardly.^[40] Nov 16 1987 Alabama, Louisiana, Mississippi^[41] 28 F2 0 Twenty-8 tornadoes touched downward; six were rated F2.^[42] Dec 14 1987 Southern U.Due south.^[43] 5 F3 6 Five tornadoes touched downward; 1 was rated F3. The F3 tornado struck the northern portions of the Memphis metropolitan area.^[44] Jan 19 1988 Alabama, Louisiana, Mississippi, Tennessee^[45] xiv F4 v Earliest date that a high risk was issued. Fourteen tornadoes touched downwards; 1 was rated F4.^[46] March 24 1988 Midwest, Southern U.S.^[47] 10 F2 0 Damaging squall line with tornadoes.^[48] Ten tornadoes touched down; three were rated F2.^[49] November 4 1988 Southern U.Due south.^[l] 18 F3 0 18 tornadoes touched downwardly; four were rated F3.^[51] November 15 1988 Midwest^[52] 44 F3 seven Tardily flavour tornado outbreak. Forty-iv tornadoes touched down; three were rated F3.^[53] November 26 1988 Southern U.South.^[54] 8 F2 0 9 tornadoes touched downwards; 2 were rated F2.^[55] March 5 1989 Alabama, Georgia, Tennessee^[56] 9 F3 1 Nine tornadoes touched down; one was rated F3.^[57] May 16 1989 Oklahoma, Texas, New Mexico^{[58] [59]} 20 F4 one Only loftier risk always issued for New United mexican states.^{[ commendation needed ]} Twenty tornadoes touched downward; i was rated F4.^[sixty] May 17 1989 Louisiana, Texas^[61] 19 F3 1 19 tornadoes touched down; 1 was rated F3.^[62] May 24 1989 Midwest^[63] 31 F4 0 Thirty-i tornadoes touched down; two were rated F4.^[64] June xiii 1989 Louisiana, Texas^[65] 1 F1 0 Only one tornado touched downward.^[66] The high take a chance was issued in the 1300 UTC outlook and removed from all subsequent outlooks. Nov 15 1989 Southern U.S.^[67] 17 F4 21 November 1989 tornado outbreak – Seventeen tornadoes touched down; one was rated F4.^[68]

Sixty-4 loftier risks were issued in the 1990s.

Storm Prediction Eye High Risk Events – 1990–1999^{[nb 1]} Engagement Year Region Tornadoes Max rating Superlative gust Fatalities Outlook Notes February 1 1990 Arkansas, Louisiana, Oklahoma, Texas^[69] 1 F1 0 One weak tornado touched down.^[70] Only the 1200 UTC outlook included a loftier risk. March fourteen 1990 Southern U.S.^[71] 11 F3 1 Eleven tornadoes touched down; one was rated F3.^[72] May nine 1990 Midwest^[73] 4 F2 0 Four tornadoes touched downwards; two were rated F2.^[74] Only the 1200 UTC outlook included a loftier risk. May 15 1990 Arkansas, Illinois, Indiana, Kansas, Kentucky, Missouri, Tennessee, Oklahoma^[75] 17 F3 1 Seventeen tornadoes touched down; one was rated F3.^[76] May 20 1990 Arkansas, Kansas, Oklahoma^[77] ten F2 0 Ten tornadoes touched downwards; ane was rated F2.^[78] Merely the 1900 UTC Outlook included a high risk. May 29 1990 Kansas, Oklahoma, Texas^[79] 9 F2 0 Mainly a damaging wind threat.^[fourscore] Nine tornadoes touched down; one was rated F2.^[81] Only the 1900 UTC Outlook included a loftier risk. June 1 1990 Great Plains^[82] 21 F4 2 Twenty-1 tornadoes touched down; ane was rated F4.^[83] June two 1990 Ohio Valley^[67] 68 F4 9 June 1990 Lower Ohio Valley tornado outbreak – Sixty-eight tornadoes touched downward; seven were rated F4.^[84] March 22 1991 Midwest, Southern U.S.^[85] 23 F3 six Twenty-three tornadoes touched down; three were rated F3.^[85] March 26 1991 Kansas, Missouri, Oklahoma^[86] 21 F4 0 Twenty-one tornadoes touched down; i was rated F4.^[87] But the 1900 UTC Outlook included a high risk. March 27 1991 Midwest^[88] 29 F3 2 Xx-nine tornadoes touched downward; half-dozen were rated F3.^[89] March 28 1991 Indiana, Michigan, Ohio^[90] ii F0 0 Two weak tornadoes touched downwards. But the 0100 UTC Outlook had a high adventure.^[91] March 29 1991 Alabama, Florida, Georgia, North Carolina, South Carolina, Virginia^[92] 21 F3 0 First and but occurrence of four consecutive high risk days. Twenty-one tornadoes touched down; one was rated F3.^[93] Apr 11 1991 Oklahoma, Kansas, Texas^[94] vii F3 0 Severe weather condition outbreak did not consolidate due to a lack of moisture and instability anticipated to develop.^[67] Vii tornadoes touched down; i was rated F3.^[95] April 12 1991 Oklahoma, Kansas, Texas^[67] 24 F3 0 Twenty-iv tornadoes touched down; two were rated F3.^[96] Apr 26 1991 Central U.Southward.^[67] 55 F5 21 Tornado outbreak of April 26, 1991 – Fifty-five tornadoes touched down; one was rated F5.^[97] April 28 1991 Eastern Oklahoma and Kansas^[67] 13 F2 0 Thunderstorm complex early on in the day prevented significant moisture from moving into the region and ultimately limited severe weather activity.^[98] Thirteen tornadoes touched down; 2 were rated F2.^[99] Apr nineteen 1992 Arkansas, Louisiana, Oklahoma, Texas^[100] 4 F1 0 Iv weak tornadoes touched down; three were rated F1.^[101] June 16 1992 Midwest^[102] 65 F5 1 Mid-June 1992 tornado outbreak – 60-five tornadoes touched down; ane was rated F5.^[103] June 17 1992 Corking Lakes^[104] 28 F3 0 Mid-June 1992 tornado outbreak – Twenty-eight tornadoes touched downwardly; one was rated F3.^[105] June xix 1992 Arkansas, Kansas, Louisiana, Oklahoma, Texas^[106] 17 F1 0 Seventeen tornadoes touched downwards; three were rated F1.^[107] Only the 1900 UTC Outlook included a high risk. July ii 1992 Arkansas, Illinois, Iowa, Kansas, Missouri, Oklahoma, Wisconsin^[108] 16 F3 0 Sixteen tornadoes touched down; one was rated F3.^[109] September nine 1992 Illinois, Indiana, Kansas, Missouri^[110] 4 F1 0 Only high risk ever issued in September. Squall line with damaging winds and some big hail.^[111] Four weak tornadoes touched down; ane was rated F1.^[112] April xix 1993 Arkansas, Illinois, Kentucky, Missouri, Tennessee^[113] 6 F2 0 Half-dozen tornadoes touched down; one was rated F2.^[114] June 3 1993 Arkansas, Illinois, Kansas, Kentucky, Missouri, Oklahoma, Tennessee^[115] 0 North/A 0 A loftier risk was issued for a derecho. No tornadoes were confirmed. Day 1 of two for the derecho. June iv 1993 Kentucky, North Carolina, Tennessee, Virginia, Westward Virginia^[116] 13 F1 80 mph (130 km/h) 0 Major derecho event.^[117] The Lynchburg, Virginia surface area was hit the hardest. The city had a current of air gust to fourscore mph, with significant damage reported. Ability was cut to 95% of the city.^[118] Xiii tornadoes touched down; half-dozen were rated F1.^[119] Merely the 1900 UTC Outlook had a high risk. June seven 1993 Upper Midwest^[120] 40 F4 0 Forty tornadoes touched down; 2 were rated F4.^[121] June eight 1993 Keen Plains, Upper Midwest^[122] 58 F3 0 L-viii tornadoes touched down; 1 was rated F3.^[123] June 23 1993 Kansas, Nebraska^[124] 3 F2 0 Only three tornadoes touched down; one was rated F2.^[125] July 3 1993 Iowa, Minnesota, Nebraska, North Dakota, South Dakota^[126] thirteen F1 0 Thirteen weak tornadoes touched downwards; iv were rated F1.^[127] March 27 1994 Southern U.S.^[128] 29 F4 40 1994 Palm Sunday tornado outbreak – Twenty-nine tornadoes touched down; two were rated F4.^[129] Only the 1900 UTC Outlook included a loftier gamble. April 25 1994 Key U.Due south.^[130] 28 F4 3 Tornado outbreak of April 25–27, 1994 – 20-eight tornadoes touched down; 1 was rated F4.^[131] In addition, there were numerous large hail reports, with hail reaching 4.l".^[132] June 14 1994 Michigan, Minnesota, Wisconsin^[133] 3 F1 0 Iii weak tornadoes touched down; one was rated F1.^[134] Merely the 1200 UTC Outlook included a high risk. August 27 1994 Iowa, Michigan, Minnesota, Nebraska, Due south Dakota, Wisconsin^[135] 12 F3 4 Just loftier chance always issued in Baronial.^{[ commendation needed ]} Twelve tornadoes touched down; two were rated F3.^[136] Nov 27 1994 Southern U.S.^[137] 18 F3 vi Eighteen tornadoes touched down; four were rated F3.^[138] April 17 1995 Oklahoma, Texas 21 F2 0 Primarily a derecho event. 20-one tornadoes touched down; ii were rated F2.^[139] May vii 1995 Kansas, Oklahoma, Texas 33 F3 6 Tornado outbreak sequence of May 6–27, 1995 – Day 1 of a 5-mean solar day event. Thirty-three tornadoes touched down; ii were rated F3.^[140] May 12 1995 Arkansas, Iowa, Kansas, Missouri, Nebraska, Oklahoma 14 F2 0 Tornado outbreak sequence of May 6–27, 1995. Twelve tornadoes touched downwards; ii were rated F2.^[141] May xiii 1995 Ohio Valley 26 F4 iii Tornado outbreak sequence of May half dozen–27, 1995 – Included a major derecho.^{[ citation needed ]} Twenty-half-dozen tornadoes touched down; two were rated F4.^[142] May 17 1995 Oklahoma ix F3 0 Tornado outbreak sequence of May half-dozen–27, 1995. Nine tornadoes touched downward; ane was rated F3.^[143] March xviii 1996 Alabama, Florida, Georgia, Mississippi, S Carolina^[144] 21 F3 0 Twenty-ane tornadoes touched downwardly; one was rated F3.^[145] April 19 1996 Illinois, Indiana, Missouri, Kentucky^{[146] [147]} 60 F3 104 mph (167 km/h) 1 Tornado outbreak sequence of Apr 1996. A full of sixty tornadoes touched down; 6 were rated F3.^[148] March 2 1997 Alabama, Louisiana, Mississippi^[149] 2 F0 0 Ii weak and short lived tornadoes touched downward.^[150] But the 1900 UTC Outlook included a high hazard. May 2 1997 Alabama, Mississippi 8 F3 92 mph (148 km/h) 1 Likewise a derecho effect.^{[ citation needed ]} Eight tornadoes touched downward; two were rated F3.^[151] July 1 1997 Upper Mississippi Valley 20 F3 109 mph (175 km/h) 0 Moderate tornado outbreak reorganized into a progressive derecho.^{[ citation needed ]} Twenty tornadoes touched downwards; i was rated F3.^[152] October 25 1997 Arkansas, Louisiana, Mississippi, Oklahoma, Texas^[153] 9 F1 0 9 tornadoes touched down; four were rated F1.^[154] Only the 1900 UTC Outlook included a high risk. February 10 1998 Alabama, Louisiana, Mississippi, Texas 11 F1 135 mph (217 km/h) 0 Rare winter serial derecho.^{[ citation needed ]} Eleven tornadoes touched down; five were rated F1.^[155] April 8 1998 Alabama^[156] 14 F5 92 mph (148 km/h) 35 Tornado outbreak of April 6–9, 1998 – F5 impairment in suburban Birmingham. Fourteen tornadoes touched down; one was rated F5.^[157] April 15 1998 Middle Mississippi Valley 21 F4 75 mph (121 km/h) 2 Tornado outbreak of April 15–16, 1998 – Day one of outbreak. Twenty-one tornadoes touched downwards; one was rated F4.^{[ citation needed ]} April 16 1998 Tennessee 41 F5 98 mph (158 km/h) 10 Tornado outbreak of April 15–sixteen, 1998 – Day two of outbreak. Forty-one tornadoes touched downward; one was rated F5.^[158] May ix 1998 Arkansas, Mississippi, Tennessee^[159] 5 F1 0 5 weak tornadoes touched down; ane was rated F1.^[160] Only the 1930 UTC Outlook included a high risk. May 31 1998 Northeastern U.Due south.^{[161] [162] [163] [164]} 42 F3 128 mph (206 km/h) 7 Late-May 1998 tornado outbreak and derecho – Just high chance e'er issued in the Northeast.^{[ citation needed ]} Twoscore-two tornadoes touched downwardly; vi were rated F3.^[165] June fourteen 1998 Ohio Valley 22 F1 92 mph (148 km/h) 0 Followed by a progressive derecho.^{[ citation needed ]} Twenty-two tornadoes touched down; 6 were rated F1.^[166] January 21 1999 Arkansas^{[167] [168]} 82 F4 8 Tornado outbreak of January 21–23, 1999 – 2nd earliest date that a loftier take a chance was issued.^{[ citation needed ]} Eighty-two tornadoes touched down; ane was rated F4.^[169] March 8 1999 Arkansas, Louisiana, Texas 10 F2 0 Few tornadoes with some scattered hail and current of air^{[ commendation needed ]} April eight 1999 Iowa, Missouri, Illinois 47 F4 two Tornado outbreak of Apr 8–nine, 1999 – 50-4 tornadoes touched downward; iii were rated F4. May iii 1999 Oklahoma, Kansas^[170] 73 F5 46 1999 Oklahoma tornado outbreak – Highest winds ever recorded in a tornado, 301 mph (484 km/h);^[171] seventy-iii tornadoes touched downwardly, including three F4s and one F5. May 4 1999 Oklahoma, Arkansas, Texas^[170] 43 F3 1 1999 Oklahoma tornado outbreak – Day 2 of outbreak May five 1999 Southern U.S. xv F4 3 1999 Oklahoma tornado outbreak – 2nd longest streak of consecutive loftier risk days. Major derecho event.^{[ commendation needed ]} June v 1999 Southward Dakota, Nebraska^[172] 21 F1 0 Event failed to consolidate with only isolated tornadoes and scattered severe wind reported. A shortwave ridge maintained a capping inversion.^[173]

There were no loftier hazard days in 2000.

Storm Prediction Center High Risk Events – 2000–2009^{[nb 1] [nb 2]} Appointment Yr Region Tornadoes Max rating Summit gust Fatalities Outlook Notes April 6 2001 Texas Panhandle, Western Oklahoma, much of Kansas, and farthermost southern Nebraska^[174] half dozen F2 124 mph (200 km/h)^† one Serial derecho with widespread current of air impairment. I person was killed by lightning in Ohio.^[175] 6 tornadoes touched down; two were rated F2.^[176] April 11 2001 Eastern Iowa, Southern Wisconsin, and northwest Illinois^[177] 40 F3 92 mph (148 km/h) 3 Tornado outbreak of Apr 10–11, 2001 – Three people were killed by tornadoes.^[178] Twoscore tornadoes touched downwards; one was rated F3.^[179] June 11 2001 Southern Minnesota, Northeastern Iowa, and W-Fundamental Wisconsin^[180] 29 F2 120 mph (190 km/h) 2 Progressive derecho with widespread wind harm. Measured thunderstorm wind gust of 120 miles per hour (193 km/h) near Atwater, Minnesota.^[181] Twenty-nine tornadoes touched down; one was rated F2. Withal, some of the tornadoes were associated with landfalling Tropical Storm Allison, not the system that triggered the high risk.^[182] October 13 2001 U.Due south. Gulf Coast^[183] 32 F3 112 mph (180 km/h)^† one 1 person was killed by straight-line winds in Illinois.^[184] 30-ii tornadoes touched downwards; i was rated F3.^[185] October 24 2001 Midwest^[186] 25 F3 104 mph (167 km/h)^† 3 Plus a major serial derecho.^{[ citation needed ]} One person was killed past straight-line winds in Michigan.^[187] Twenty-five tornadoes touched downwardly; ii were rated F3.^[188] Apr 16 2002 Upper Midwest^[189] 14 F3 85 mph (137 km/h)^† ane I person was killed by straight-line winds in Kansas.^[190] 14 tornadoes touched down; i was rated F3.^[191] Loftier hazard removed at 2000 UTC outlook update, prior to the initiation of the near intense severe weather. July 31 2002 Minnesota, Wisconsin^[192] three F0 75 mph (121 km/h)^† 0 No fatalities took identify.^[193] Three weak tornadoes touched down.^[194] Only the 0600 UTC outlook included a high risk. November x 2002 Midwest and Southern U.S.^[195] 61 F4 100 mph (160 km/h)^† 32 Tornado outbreak of November nine–eleven, 2002 – No not-tornadic expiry took place.^[196] Sixty-one tornadoes touched down; one was rated F4 (in Northwest Ohio, outside the loftier run a risk area – the strongest tornadoes within the high risk were rated F3). 30-two people were killed by the outbreak. Part of a three-24-hour interval outbreak that resulted in 83 tornadoes and 36 deaths.^[197] Dec 23 2002 Texas, Louisiana^[198] fifteen F1 lxx mph (110 km/h)^† 0 One of only ii high gamble e'er issued in December^{[ citation needed ]} and second latest in the twelvemonth (offset was December 24, 1982). No fatalities took identify.^[199] Fifteen tornadoes touched downward; three were rated F1.^[200] April 6 2003 Texas, Louisiana, Mississippi^[201] 18 F3 83 mph (134 km/h) 0 Eighteen tornadoes touched down; i was rated F3.^[202] May 4 2003 Central U.S.^[203] 85 F4 89 mph (143 km/h)^† 39 May 2003 tornado outbreak sequence – Fourscore-five tornadoes touched down; four were rated F4.^[204] May 5 2003 Southern U.S.^[205] 21 F3 104 mph (167 km/h)^† 0 May 2003 tornado outbreak sequence – 20-i tornadoes touched down; one was rated F3.^[206] May eight 2003 Kansas, Oklahoma^[207] 43 F4 104 mph (167 km/h) 0 May 2003 tornado outbreak sequence – Forty-three tornadoes touched downward; ane was rated F4.^[208] May ten 2003 Cardinal U.South.^[209] 52 F3 92 mph (148 km/h)^† 0 May 2003 tornado outbreak sequence – Fifty-one tornadoes touched down; four were rated F3.^[210] Likewise included 35% tornado probability expanse, above the 25% minimum threshold for a high risk. May 15 2003 Texas, Oklahoma^[211] 47 F2 92 mph (148 km/h)^† 0 Forty-seven tornadoes touched down; 7 were rated F2.^[212] March four 2004 Texas, Oklahoma^[213] 25 F2 91 mph (146 km/h) 0 Reorganized into a big series derecho^{[ commendation needed ]} Twenty-five tornadoes touched downward; two were rated F2.^[214] May 22 2004 Nebraska, Iowa^[215] 68 F4 106 mph (171 km/h) 1 May 2004 tornado outbreak sequence/2004 Hallam tornado – Sixty-eight tornadoes touched down; 1 was rated F4. The F4 tornado was the largest tornado on tape at the time with a peak width of 2.5 miles (4.0 km) every bit it struck Hallam, Nebraska.^[216] 2nd of only three known times a high risk was not issued until 0100 UTC (the other two being March 28, 1991 and Apr 30, 2010). May 24 2004 Nebraska, Iowa^[217] 54 F2 104 mph (167 km/h)^† one May 2004 tornado outbreak sequence – Also a major derecho event.^{[ citation needed ]} L-iv tornadoes touched downwardly; ii were rated F2.^[218] May 29 2004 Key U.South.^[219] eighty F4 ninety mph (140 km/h) 3 May 2004 tornado outbreak sequence – Eighty tornadoes touched down; one was rated F4.^[220] May 30 2004 Central U.S.^[221] 86 F3 120 mph (190 km/h)^† 2 May 2004 tornado outbreak sequence – Eighty-half dozen tornadoes touched downwards; two were rated F3.^[222] Included 35% tornado risk expanse above minimum threshold of 25%. April eleven 2005 Louisiana, Mississippi^[223] 3 F0 86 mph (138 km/h) 0 Three weak tornadoes touched downward.^[224] June 4 2005 Central U.Due south.^[225] 44 F2 81 mph (130 km/h)^† 0 Forty-4 tornadoes touched downwardly; one was rated F2.^[226] November 15 2005 Midwest and Southern U.S.^[227] 49 F4 98 mph (158 km/h)^† one Mid-Nov 2005 tornado outbreak – Forty-nine tornadoes touched down; ane was rated F4. This was the only trigger-happy tornado to be recorded in 2005.^[228] March 12 2006 Midwest^[229] 59 F4 107 mph (172 km/h)^† nine Tornado outbreak sequence of March 9–13, 2006 – 50-nine tornadoes touched down; one was rated F4.^[230] One supercell storm tracked near 800 miles from Oklahoma to Michigan, producing many tornadoes forth its path. Apr 6 2006 Nebraska, Kansas^[231] 12 F2 82 mph (132 km/h) 0 Tornado outbreak of April 6–8, 2006 – Twelve tornadoes touched downward; one was rated F2.^[232] April 7 2006 Southern U.S.^[233] 47 F3 92 mph (148 km/h)^† 10 Tornado outbreak of April 6–8, 2006 – Simply known high risk to include a 60% tornado contour, the highest level issued by the SPC.^[234] Too is the get-go of but two known occurrences (the other April fourteen, 2012) in which a Day 2 high gamble outlook was issued, and is the first/only instance to date where a high risk was issued for both Day i (April 6th) and Day 2. Forty-seven tornadoes touched downwardly; two were rated F3.^[235] March 1 2007 Southern U.S.^[236] 36 EF4 81 mph (130 km/h)^† xx Tornado outbreak of February 28 – March two, 2007 – Thirty-vi tornadoes touched down; two were rated EF4.^[237] April 13 2007 Texas^[238] 7 EF1 81 mph (130 km/h)^† one April 2007 nor'easter – But seven tornadoes touched down; one was rated EF1.^[239] April 24 2007 Texas^[240] 23 EF3 90 mph (140 km/h)^† seven Tornado outbreak sequence of April 20–27, 2007 – 20-three tornadoes touched downward; ane was rated EF3, although this all occurred outside the high risk area, which saw virtually no activity. The supercell that produced the EF3 tornado likewise produced an F4 tornado in Mexico earlier crossing the international border.^[241] May 5 2007 Nebraska, Kansas^[242] 90 EF3 100 mph (160 km/h) 1 Tornado outbreak of May 4–6, 2007 – Ninety tornadoes touched down; ii were rated EF3.^[243] June vii 2007 Upper Midwest^[244] 12 EF3 81 mph (130 km/h)^† 0 Reorganized into a moderate current of air outcome^{[ citation needed ]} Twelve tornadoes touched downward; one was rated EF3.^[245] February 5 2008 Middle Mississippi Valley^[246] 63 EF4 100 mph (160 km/h)^† 48 2008 Super Tuesday tornado outbreak – Sixty-three tornadoes touched down; iii were rated EF4.^[247] One EF4 tornado in Arkansas tracked over 120 miles. One of just ii high chance issued in January or February since January 21, 1999 continuing to present, with the other being January 22, 2017. March fifteen 2008 Georgia, S Carolina^[248] 44 EF3 100 mph (160 km/h)^† ii 2008 Atlanta tornado outbreak – Xl-four tornadoes touched downwards; three were rated EF3.^[249] May 22 2008 Kansas^[250] 28 EF3 100 mph (160 km/h)^† 1 Tornado outbreak sequence of May 22–31, 2008 – 20-eight tornadoes touched down; one was rated EF3.^[251] May 29 2008 Nebraska, Iowa, South Dakota^[252] 37 EF3 85 mph (137 km/h)^† 0 Tornado outbreak sequence of May 22–31, 2008 – 30-7 tornadoes touched down; two were rated EF3.^[253] June v 2008 Midwest^[254] xl EF2 100 mph (160 km/h)^† 0 Tornado outbreak sequence of June iii–11, 2008 – Forty tornadoes touched down; iii were rated EF2.^[255] Also including a threescore% significant astringent wind probability which meets high risk standards. April 10 2009 Alabama, Georgia, Tennessee^[256] 62 EF4 96 mph (154 km/h)^† ii Tornado outbreak of April 9–11, 2009 – Threescore-two tornadoes touched downward; i was rated EF4.^[257] April 26 2009 Oklahoma, Kansas, Texas^[258] 11 EF2 81 mph (130 km/h)^† 0 Eleven tornadoes touched downwards; ane was rated EF2.^[259] Despite the maintenance of the loftier gamble through the day, the outbreak busted as a whole. † – Value is estimated

In that location were no high risk days in 2015, 2016, or 2018.

Storm Prediction Center High Risk Events – 2010–2019^{[nb 1]} Date Year Region Tornadoes Max rating Peak gust Fatalities Outlook Notes April 24 2010 Southern U.S.^[260] 39 EF4 120 mph (190 km/h)^† 10^[261] Tornado outbreak of Apr 22–25, 2010 – 39 tornadoes were confirmed; ii were rated EF4. One tornado was the second-widest in Mississippi state history, and the fourth-longest tracked in the state. Discontinued at 01Z. April 30 2010 Arkansas^[262] 27 EF3 75 mph (121 km/h)^† 1^[263] Tornado outbreak of April 30 – May ii, 2010 – Day ii of outbreak. For only the 3rd known fourth dimension a high hazard was not issued until 0100 UTC (the kickoff such occurrence was March 28, 1991) and was a slight hazard for nigh of the twenty-four hours. This is the only day in which the area to eventually exist in a high risk was not fifty-fifty in a moderate run a risk until 2000 UTC. 28 tornadoes touched downwardly; two were rated EF3. May one 2010 Center Mississippi Valley^[264] 30 EF3 83 mph (134 km/h)^† 4 Tornado outbreak of April xxx – May 2, 2010 – Only eleven weak tornadoes were confirmed during the day, but several strong tornadoes touched down overnight. A major overflowing disaster as well occurred from the aforementioned storm. May ten 2010 Oklahoma, Kansas^[265] 70 EF4 100 mph (160 km/h)^† 3 Tornado outbreak of May x–13, 2010 – 70 tornadoes were confirmed; ii were rated EF4. May 19 2010 Oklahoma^[266] 24 EF1 seventy mph (110 km/h)^† 0 Twenty-four weak tornadoes were confirmed. Significant flooding occurred from the aforementioned storm organisation. October 26 2010 Ohio, Indiana, Illinois, Michigan^[267] 43 EF2 85 mph (137 km/h)^† 0 October 2010 Due north American storm complex – Event set tape for the deepest extratropical low over the continental The states, major derecho consequence.^{[ citation needed ]} High risk was based on 60% meaning severe wind probability, with a tornado probability of 15% falling curt of high risk standards. 43 tornadoes were confirmed; five were rated EF2. Discontinued at 2000 UTC as the master activity was in the forenoon and early afternoon. Apr xvi 2011 North Carolina, Virginia^[268] 53 EF3 81 mph (130 km/h)^† 26 Tornado outbreak of Apr 14–16, 2011 – 53 tornadoes touched down; six were rated EF3. Discontinued at 01Z; storms had mostly moved off the East Coast. April 26 2011 South-Central U.South.^[269] 58 EF3 110 mph (180 km/h)^† 0 2011 Super Outbreak – Day 2 of outbreak. 58 tornadoes touched down; ane was rated EF3. Apr 27 2011 Southern U.S.^[270] 218 EF5 100 mph (160 km/h)^† 317 2011 Super Outbreak – Twenty-four hours iii of outbreak; outcome set tape for most tornadoes in a 24-hr period.^{[ citation needed ]} Deadliest loftier-take a chance day on tape; included a 45% tornado surface area which is above the minimum threshold for a high risk. Also produced kickoff known watch (PDS tornado watch 235) with a >95% probability for all severe and significant severe hazards.^[271] 218 tornadoes touched downwardly; 4 were rated EF5. May 24 2011 Oklahoma, Kansas, Texas^[272] 47 EF5 92 mph (148 km/h)^{† *} 14 Tornado outbreak sequence of May 21–26, 2011 – Mean solar day iv of outbreak. Included a 45% tornado area, above minimum high gamble threshold. 47 tornadoes touched down; one was rated EF5. Discontinued at 01Z. May 25 2011 Midwest^[273] 94 EF4 100 mph (160 km/h)^† 4 Tornado outbreak sequence of May 21–26, 2011 – Day 5 of outbreak. 94 tornadoes touched down; i was rated EF4. Discontinued at 01Z. March 2 2012 Midwest and Southern U.S.^[274] 64 EF4 86 mph (138 km/h)^† 41 Tornado outbreak of March 2–iii, 2012 – Sixty-four tornadoes touched down; ii were rated EF4. Discontinued at 01Z. April 14 2012 Fundamental U.S.^[275] 83 EF4 97 mph (156 km/h) half-dozen Tornado outbreak of April 13–16, 2012 – Twenty-four hour period 2 of outbreak; 2nd high take chances to be issued on Mean solar day ii (the day earlier the event; offset Twenty-four hours ii loftier risk was for Apr 7, 2006) and the beginning/only to engagement ever issued on the initial (0600 UTC) Day two outlook.^{[275] [ failed verification ]} Included 45% tornado probability higher up minimum threshold of 30%. 83 tornadoes touched down; one was rated EF4. Take a chance largely disrepair in most of Oklahoma (except far northern and western); brunt of outbreak was focused in Kansas. June 12 2013 Midwest^[276] xix EF3 95 mph (153 km/h)^† 0 June 12–13, 2013 derecho series – High risk driven past threescore% significant severe wind probability, with maximum tornado probability of 15%, well brusque of high risk level. nineteen tornadoes touched downwards; one was rated EF3. Discontinued at 01Z. November 17 2013 Midwest^[277] 73 EF4 85 mph (137 km/h)^† 8^[278] Tornado outbreak of November 17, 2013 – An unusually far north tornado outbreak; i of v loftier risk days during the calendar month of Nov in recorded history.^[279] Third latest date in the yr a high risk has been issued since 2000 (the 2nd latest was Dec 23, 2002 in the Deep South), and latest date a high risk has been issued in the Midwest, surpassing previous latest of November 15, 2005. Also included a high risk level (lx% significant severe) wind probability in 2000 UTC outlook. 73 tornadoes touched downward; 2 were rated EF4. Discontinued at 01Z; storms had moved east of areas that had been in a high take a chance. April 27 2014 Southwestern Arkansas^[280] 16 EF4 90 mph (140 km/h)^† 19 Tornado outbreak of April 27–30, 2014 – Day 1 of outbreak. Small high chance area that included the cities of Little Rock, Camden, and Danville. Merely 1 tornado touched downward in the area earlier the loftier take a chance was discontinued in a special outlook update at 0230 UTC; this tornado was rated EF4.^[281] April 28 2014 Alabama, Mississippi^[282] 50 EF4 70 mph (110 km/h)^† xvi Tornado outbreak of April 27–30, 2014 – Twenty-four hour period ii of outbreak. Numerous long-tracked and strong to violent tornadoes beyond Mississippi, Alabama, and Tennessee. Largest tornado outbreak in central Alabama since Apr 27, 2011. 50 tornadoes touched down; one was rated EF4. Discontinued at 01Z.^[283] June 3 2014 Nebraska, Iowa, Missouri^[284] 16 EF3 100 mph (160 km/h)^† 0 Issued for 60% current of air probability and potential derecho; tornado probability was x%, well short of high risk level. Extreme hail/air current and some tornadoes reported; i tornado was rated EF3. High chance discontinued at 01Z. January 22 2017 Georgia, Florida^[285] 20 EF3 75 mph (121 km/h) 16 Tornado outbreak of January 21–23, 2017 – Day ii of outbreak; issued for 30% tornado probability as well as x% probability of EF2 or greater tornado (inside 25 miles of a bespeak) primarily in northern Florida and southern Georgia.^[286] As well the get-go loftier risk issued under the five-category system (which began in Oct 2014). Twenty tornadoes touched down during the day; two were rated EF3. Sixteen deaths resulted from the tornadoes. High risk discontinued at 01Z. April two 2017 Texas, Louisiana^[287] 28 EF2 seventy mph (110 km/h) two Issued for a thirty% probability of pregnant tornadoes. The high risk was eventually discontinued at 01Z, however the storm yielded 20-eight tornadoes; half dozen of which were rated EF2.^[288] April five 2017 Georgia, S Carolina^[289] 26 EF2 80 mph (130 km/h) 0 Issued for a 30% probability of tornadoes. A total of 20-six tornadoes were confirmed, four of which were rated EF2. The high gamble was discontinued at effectually 01Z.^[290] May 18 2017 Kansas, Oklahoma^[291] 45 EF2 104 mph (167 km/h) 0 Tornado outbreak sequence of May xv–twenty, 2017 – Day iv of outbreak sequence. Issued for a xxx% probability of pregnant tornadoes. The outbreak was widely predictable with a Moderate take a chance originally being issued on Day ii. A total of forty-5 tornadoes were confirmed, 3 of which were rated EF2. The high hazard was discontinued at 01Z.^[292] May xx 2019 Oklahoma, Texas^[293] 39 EF3 94 mph (151 km/h) 0 Tornado outbreak sequence of May 2019 – Day 4 of outbreak. Initially issued for a 30% probability of significant tornadoes; expanded and upgraded at 1626Z for a 45% probability of significant tornadoes, exceeding the high adventure criteria. This high risk produced the 2nd known tornado watch with a >95% chance of all hazards (PDS Tornado Watch 199).^[294] Despite the high parameters that were in identify for the day, 30 nine tornadoes were confirmed, ane of which was rated EF3. The high risk was discontinued at 06z.^[295] † – Value is estimated
* – Pinnacle wind gust of 151 mph (243 km/h) measured during the EF5 El Reno tornado
** – Values are preliminary and subject to change

In that location were no loftier chance days in 2020.

Storm Prediction Center High Gamble Events – 2020–2022^{[nb 1]} Appointment Year Region Tornadoes Max rating Peak gust Fatalities Outlook Notes March 17 2021 Mississippi, Alabama, Louisiana, Arkansas^[296] 40 EF2 64 mph (103 km/h) 0 Tornado outbreak of March 16–18, 2021 – Originally issued for a xxx% probability of significant tornadoes; upgraded to 45% tornado risk at 1606Z. A total of twoscore tornadoes were confirmed, iv of which were rated EF2, although little tornado activity occurred within the 45% hazard area.^[297] March 25 2021 Mississippi, Alabama, Tennessee^[298] 20 EF4 85 mph (137 km/h) half dozen Tornado outbreak sequence of March 24–28, 2021 – Issued for a thirty% hatched surface area for tornadoes. A PDS tornado lookout was issued, with a >95% risk for both tornadoes and stiff tornadoes, and loftier probabilities for most other categories. Multiple tornado emergencies were issued for at to the lowest degree three different tornadoes. The loftier hazard was discontinued at 01z and downgraded to an Enhanced risk as the storm organisation began weakening and the supercells began dying off, although the strongest tornado, which was rated EF4, took place a few hours subsequently that time.^{[299] [300]} † – Value is estimated
* – Values are preliminary and subject to change

Source: https://en.wikipedia.org/wiki/List_of_Storm_Prediction_Center_high_risk_days

Posted by: granadosguried.blogspot.com

Share this post