Nanafalia 1 (Marengo County) EF-1 Tornado Geiger (Sumter County) EF-3 Tornado Gainesville (Sumter County) EF-2 Tornado Black Warrior (Greene and Tuscaloosa Counties) Greensboro (Hale County) EF-2 Tornado Cuba (Sumter County) EF-2 Tornado West Blocton (Bibb County) EF-1 Tornado Forkland (Hale and Greene Counties) EF-2 Tornado Alabaster (Shelby County) EF-0 Tornado Myrtlewood-Pinhook
(Marengo County) EF-3 Tornado Pinhook (Marengo County) EF-2 Tornado Dayton (Marengo County) EF-2 Tornado Wilsonville (Shelby County) EF-1 Tornado Uniontown (Perry County) EF-0 Tornado Hamburg (Perry County) EF-2 Tornado Nanafalia 2 (Marengo County) EF-2 Tornado Paul M. Grist State Park (Dallas County) EF-1 Tornado Eastern Lowndes (Lowndes County) EF-0 Tornado Marion Junction (Dallas County) EF-1 Tornado Beloit (Dallas County) EF-1 Tornado Independence (Autauga County) EF-1 Tornado Oak Grove/Marbury (Autauga County) EF-1 Tornado Rollins (Autauga County) EF-0 Tornado Mulberry (Dallas and Autauga Counties) EF-2 Tornado Titus (Elmore County) EF-0 Tornado Peace (Autauga County) EF-1 Tornado Boones Chapel (Autauga County) EF-3 Tornado Equality (Elmore, Coosa and Tallapoosa Counties) EF-2 Tornado Jacksons Gap (Tallapoosa County) EF-1 Tornado

Tornado Outbreak of April 15th, 2011 


Event Summary for Central Alabama

In many respects, this tornado outbreak was a forgotten event. This was due to the historically bad month  Central Alabama experienced concerning severe weather and tornadoes. This April 15th event still stands as the second highest tornado producer for any Alabama event in history. There were 45 tornadoes in Alabama on April 15th, which is 3 more than the 30 year average in one day.  There were 5 F3 tornadoes on this day. Five tornadoes occurred that affected Marengo County and 6 tornadoes occurred that affected Autauga County.

As part of a system which wreaked havoc across the eastern half of the United States (April 14-16), the following is an account of the tornado outbreak of April 15th, 2011, in Central Alabama.

A surface low, which had developed across the Central Plains on Thursday, the 14th, deepened as it moved into the Mid-Mississippi Valley.  In response to this deepening low pressure, surface dew points in the middle to upper 60s surged northward into Central Alabama and deep vertical wind shear increased.  By the Friday morning the 15th, it was evident environmental conditions were going to be perfect for tornadic supercell development.  The Storm Prediction Center issued the first Tornado Watch for Central Alabama prior to 8 am and supercell development began just after 11 am across central Mississippi.  These storms crept across the Mississippi and dropped multiple damaging tornadoes.  The first tornado warning in Central Alabama was issued at 1152 am in Marengo County and warnings were issued until 1215 am the next morning.

Select the numbered boxes on the map below to view more detailed information about each tornado track. Only tornadoes within the Birmingham County Warning Area are selectable.

 
 April 15, 2011 Tornado Outbreak
 
          

Pertinent Geographic Information Systems (GIS) Data from this Event

 
Location/Clickable Detailed Summary Link
Damage Rating/Estimated Maximum Wind Speeds
Injuries/Fatalities
Damage Path Length/Width
Starting Point/Time
Ending Point/Time
EF-1
100 mph
(EF-1 in WFO MOB)
None
4.21 miles
60 yards
4.30 WSW Nanafalia
32.1125/-88.0500
1210 pm
0.10 WSW Nanafalia
32.1200/-87.9816
1221pm
EF-3
140-150 mph
(EF-3 in WFO JAN)
None
10.5 miles
1760 yards
4.10 SW Geiger
32.8442/-88.3569
145 pm
2.8 SSE Warsaw
32.8917/-88.1835
205 pm
EF-2
115 mph
None
4.5 miles
200 yards
2.20 SSE
Bodka
32.789/-88.241  303 pm
1.00 SSE Gainesville
32.806/-88.165   310 pm
EF-3
140 mph
None
18.37 miles
500 yards
2.50 ENE Knoxville
33.012/-87.734
314 pm
E Tuscaloosa
33.190/-87.504  345 pm
EF-2
115 mph
None
2.20 miles
700 yards
3.4 NW Greensboro
32.7285/-87.6276
333 pm
4.2 NNW Greensboro
32.7566/-87.66097  337 pm
EF-2
115 mph
None
8.9 miles
200 yards
3 E Cuba
32.4359/-88.3288
353 pm
3.3 W Lilita
32.4839/-88.1868  407 pm
EF-1
105 mph
None
21.77 miles
1760 yards
1.1 ENE
Mertz
32.9040/-87.3625
400 pm
1.5 ESE
West Blocton
33.1092/-87.0773  434 pm
EF-2
130 mph
None
24.1 miles
880 yards
2.1 ESE Forkland
32.6426/-87.8456
444 pm
2.3 W
Hogglesville
32.8445/-87.5088   522 pm
EF-0
70 mph
None
1.37 miles
50 yards
Alabaster 33.2380/-86.8363
459 pm
Alabaster 33.2449/-86.8141  502 pm
EF-3
150 mph
4 Injuries/
1 Fatality
15.58 miles
800 yards
5.1 NNW
Nanafalia
32.1901/-88.0056
504 pm
3.1 NNW
Linden
32.3431/-87.8159     528 pm
EF-2
130 mph
None
5.4 miles
575 yards
2.8 NNW
Anopia
32.3089/-87.9304
519 pm
1.6 ESE
Jefferson
32.3710/-87.8742    530 pm
EF-2
125 mph
None
10.9 miles
600 yards
1.6 NW
Linden Airport
32.2884/-87.7380
535 pm
1.1 SSE
Siddonsville
32.3862/-87.5921  553 pm
EF-1
85-90 mph
None
4.38 miles
100 yards
2.9 WNW
Wilsonville
33.2477/-86.5256
544 pm
3 NNE
Wilsonville
33.2680/-86.4537
549 pm
EF-0
85 mph
None
4.65 miles
150 yards
1.8 SSW
Ellawhite
32.4055/-87.5098
600 pm
1.6 SSE
Tayloe
32.4296/-87.4354
605 pm
EF-2
115 mph
None
0.8 miles
500 yards
1.8 NW
Vilula
32.5666/-87.2943
625 pm
2 NNW
Vilula
32.5761/-87.2863  627 pm
EF-2
135 mph
(EF-2 in WFO MOB)
None
21.08 miles
800 yards
4.3 WSW
Nanafalia
32.0820/-88.0500
638 pm
2.1 SSW
Linden Airport
32.2413/-87.7304   709 pm
EF-1
90 mph
None
0.1 miles
75 yards
6 NNE
Summerfield
32.6004/-87.0091
705 pm
6.1 NNE
Summerfield
32.6013/-87.0079
707 pm
EF-0
75 mph
None
2.73 miles
75 yards
2.4 N
Tyson
32.2140/-86.4519
723 pm
4.6 NNE
Tyson
32.2394/-86.4162
727 pm
EF-1
90 mph
None
0.18 miles
100 yards
2.8 N
Marion Junction
32.4700/-87.2346 748 pm
2.9 N
Marion Junction
32.4713/-87.2320
750 pm
EF-1
105 mph
None
1.64 miles
250 yards
2 NNW
Beloit
32.3776/-87.1618
804 pm
2.5 WNW
Selma Airport
32.3880/-87.1366
807 pm
EF-1
90 mph
None
7.88 miles
200 yards
3.3 ESE
Independence
32.5095/-86.6680
848 pm
2.6 NNW
Poseys Crossroads
32.6037/-86.5918
859 pm
EF-1
90 mph
None
13.42 miles
200 yards
2.2 W
Poseys Crossroads
32.5639/-86.6064
856 pm
1.9 E
Marbury
32.7040/-86.4479
916 pm
EF-0
75 mph
None
4.4 miles
50 yards
3.4 NW
Pine Level
32.6144/-86.5121
907 pm
0.6 SE
Wadsworth
32.6634/-86.4631
912 pm
EF-2
130 mph
None
13.17 miles
800 yards
1.6 NNE
Tyler
32.3500/-86.8700 925 pm
2 SW
Independence
32.5100/-86.7500
940 pm
EF-0
75 mph
None
0.35 miles
50 yards
Titus 32.7216/-86.3133
927 pm
Titus 32.7225/-86.3073  929 pm
EF-1
90 mph
None
3.01 miles
800 yards
5.5 SW
Marbury
32.3824/-86.8297
928 pm
3.2 S
Mulberry
32.4040/-86.7848
933 pm
EF-3
150 mph

4 Injuries/
3 Fatalities

9.29 miles
400 yards
1 NW
Poseys Crossroads
32.5730/-86.5800
1047 pm
2.9 SSE
Pine Flats
32.6110/-86.4272
1101 pm
EF-2
130 mph
2 Injuries
20.75 miles
1320 yards
2.3 SW
Weoka
32.6886/-86.2087
1117 pm
2.3 WNW
Lake MArtin North
32.8742/-85.9100  1143 pm
EF-1
100 mph
None
6.64 miles
200 yards
1.5 NNW
Lake Martin North
32.8657/-85.8830
1143 pm
2.8 E
Sturdivant
32.9278/-85.8019  1152 pm

Preliminary Local Storm Reports

 

 

 

Central Alabama April 15th Statistics

 
-April 15th was one of the largest tornado outbreaks in Central Alabama history by the number of tornado occurrences.
-There were 29 confirmed tornadoes in Central Alabama on April 15th.
-The combined tornado damage path length in Central Alabama was 244.23 miles.
-Ten of the tornadoes had damage path lengths over 10 miles long.
-Three tornadoes started outside Central Alabama.
-There were at least 10 injuries reported and 4 people lost their lives
-Tornado Watch 140 was in effect from 733 am CDT until 3 pm CDT.
-Tornado Watch 141 was in effect from 1121 am CDT until 9 pm CDT.
-Tornado Watch 146 was in effect from 751 pm CDT until 3 am CDT.
-NWS BMX issued 45 Tornado Warnings.
-NWS BMX issued 19 Severe Thunderstorm Warnings.
 

Number of Tornadoes by EF-Scale

EF0 EF1 EF2 EF3 EF4 EF5
5 10 10 4 0 0
 

Severe Weather Episode Data 

 

Surface analysis
Surface Analysis
Apr 15 1 pm
Surface Analysis 21z
Surface Analysis
Apr 15 4 pm 
Day 1 Outlook
Day 1 Severe Weather Outlook
Issued Apr 15 7 am
Storm Reports
Day 2 Severe Weather Outlook
Issued Apr 14 1 am
Day 1 Outlook
Day 3 Severe Weather Outlook
Issued Apr 13 3 am
Storm Reports
Storm Reports Apr 14th
Storm Reports
Storm Reports Apr 15th
Storm Reports
Storm Reports Apr 16th
Raob
BMX Sounding 15/12z Courtesy of University of Wyoming
Raob
JAN Sounding 15/12z Courtesy of University of Wyoming
Radar
Afternoon Reflectivity Loop
Radar
Afternoon SRM Loop
Radar
Evening Reflectivity Loop
Radar
Evening SRM Loop
 

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