Over the space of about four hours from late on April 19 into the early morning hours of April 20, 2011, a squall line brought a historic number of tornadoes to southern Indiana and central Kentucky. Storm surveys over the subsequent few days uncovered 25 tornadoes -the most ever recorded here in one outbreak.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LMK wrote it up.
Over the space of about four hours from late on April 19 into the early morning hours of April 20, 2011, a squall line brought a historic number of tornadoes to southern Indiana and central Kentucky. Storm surveys over the subsequent few days uncovered 25 tornadoes -the most ever recorded here in one outbreak. On the 19th, low pressure had organized over southeast Kansas with a stationary front reaching east into the central Appalachians. Plentiful moisture streamed northward from the Gulf of Mexico ahead of the system. The Kansas low moved along the front and swung a cold front eastward. Instability, strong upper level winds, and significant changes in wind speed and direction with height helped cause a large squall line to develop ahead of the low and its cold front. The squall line caused severe weather from the eastern Great Lakes to the Red River Valley. Over two dozen tornadoes spun up along the line as it crossed southern Indiana and central Kentucky. Despite the numerous twisters and the fact that they struck during the overnight hours, there were no fatalities or injuries.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Louisville, KY wrote its last area forecast discussion before the first event at Apr 19, 9:42 PM EST, 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LOUISVILLE KY 1042 PM EDT TUE APR 19 2011 ...MESOSCALE UPDATE... ...SEVERE WEATHER THREAT RAPIDLY APPROACHING SOUTHWEST INDIANA AND NORTHWEST KENTUCKY... ACTIVE WEATHER NIGHT IN STORE FOR MUCH OF THE REGION WITH A WIDESPREAD DAMAGING WIND EVENT LIKELY. LATEST RADAR SCANS SHOW A VERY MATURE QUASI-LINEAR CONVECTIVE SYSTEM PLOWING EASTWARD INTO THE OHIO VALLEY. TWO DISTINCT BOWS WERE NOTED WITH ONE GOING THROUGH THE INDIANAPOLIS METRO AREA AND THE SECOND ONE HEADING BASICALLY RIGHT AT NORTH-CENTRAL KENTUCKY. THE SOUTHERN BOW MEANS BUSINESS AS WE'RE ALREADY SEEING DOPPLER VELOCITIES IN EXCESS OF 80KTS. NUMEROUS REPORTS ARE FLOODING IN FROM SOUTHERN ILLINOIS OF WIDESPREAD DAMAGING WINDS AND POWER OUTAGES. SFC WIND SPEEDS IN EXCESS OF 70 MPH HAVE BEEN REPORTED. ATMOSPHERE AHEAD OF THIS LINE IS STRONGLY UNSTABLE WITH LIFTED INDICES LESS THAN -6 DEG CELSIUS AND CAPES IN THE 2000-2500 J/KG AND AN UNCAPPED ATMOSPHERE. THUS...ENVIRONMENT AHEAD OF THIS LINE IS VERY SUPPORTIVE AND SHOULD MAINTAIN THIS LINE THROUGH OUR AREA. BY AND LARGE...WIDESPREAD WIND DAMAGE IS LIKELY WITH THIS LINE. HOWEVER...EMBEDDED MESOVORTICES WILL LIKELY RESULT IN TORNADIC SPINUPS ALONG THE LINE. BASED ON CURRENT SPEEDS...THIS LINE WILL ENTER OUR NORTHWEST CWA WITHIN THE NEXT 60 MINUTES. THE LINE WILL LIKELY IMPACT THE LOUISVILLE METRO AREA BETWEEN MIDNIGHT - 100 AM EDT. RESIDENTS OF SOUTHERN INDIANA AND CENTRAL KENTUCKY...MAINLY WEST OF I-65 SHOULD BE PREPARED FOR HIGH WINDS AND POWER OUTAGES IN THE NEXT FEW HOURS. .SHORT TERM (TONIGHT AND WEDNESDAY)... ...SEVERE WEATHER EPISODE LIKELY LATE THIS EVENING INTO THE OVERNIGHT PERIOD. WIND DAMAGE...SOME OF IT POTENTIALLY SIGNIFICANT...AND ISOLATED TORNADOES EXPECTED... PARAMETERS STILL IN PLACE FOR A SEVERE WEATHER OUTBREAK OVER S-CENTRAL IND AND CENTRAL KY TONIGHT. LOW CLOUDS TRAPPED UNDERNEATH CAPPING INVERSION HAVE BEEN SLOW TO CLEAR THIS AFTERNOON...BUT ARE STARTING TO ERODE. TEMPS NOW WARMING NICELY WITH READINGS NOW IN MID 70S TO MID 80S. WARM FRONT...RESPONSIBLE FOR TSTMS THIS MORNING OVER PARTS OF SRN IND...HAS LIFTED JUST N OF AREA. AT THIS TIME...ANOTHER AXIS OF ENHANCED CLOUDS WAS LOCATED OVER SRN IL INTO SW IND WHERE SCT SHOWERS AND TSTMS COULD DEVELOP THIS AFTERNOON WITHIN AREA OF SLOWLY ERODING CAPPING INVERSION ALOFT. 12Z NAM ACTUALLY RESOLVED THIS FEATURE AND DEVELOPS SOME WARM-SECTOR CONVECTION LATE THIS AFTERNOON AND EARLY EVENING. WILL CONTINUE TO INCLUDE A CHANCE OF TSTMS OVER S-CENTRAL IND AND N-CENTRAL KY THROUGH EARLY EVENING TO ACCOUNT FOR THIS FEATURE. SPC HAS JUST ISSUED THE FIRST TORNADO WATCH FOR PARTS OF CENTRAL IL TO SRN/SW MO...THE AREA WHERE THE SEVERE WEATHER OUTBREAK WILL BEGIN. IN THIS AREA...INSTABILITY...INCREASING LOW-LEVEL SHEAR...AND INCREASING FORCING ALONG THE COLD FRONT WILL ALLOW TSTMS TO EXPAND RAPIDLY AS THE CAP IS BROKEN. CELLULAR-BASED CONVECTION (I.E. SUPERCELLS) IS LIKELY IN THIS AREA. THIS AREA WILL CONGEAL INTO A LINEAR MODE OF CONVECTION (I.E., SQUALL LINE) WITH BOWING SEGMENTS INCREASING IN NUMBER WITH TIME AS THE LINE MOVES E INTO THE LOWER OH VALLEY THIS EVENING. THE MODELS ARE USUALLY SLOW IN THE TIMING OF THE LINE AS THE COLD POOL ASSOCIATED WITH RAIN WITH THE STORMS HELPS TO ACCELERATE THE LINE FASTER THAN WOULD BE EXPECTED GIVEN AMBIENT WIND FIELDS. AS A RESULT...EXPECT LINE TO REACH OUR FAR NW COUNTY (DUBOIS) IN IND BY ABOUT 10 PM EDT...LOUISVILLE TO BOWLING GREEN AXIS ABOUT 11 PM OR MIDNIGHT...FRANKFORT ABOUT 12-2 AM AND LEXINGTON AROUND 2-3 AM EDT. ALTHOUGH CONVECTION WILL FORM ALONG AND JUST E OF THE FRONT IN MO THIS AFTERNOON...AFTER THE STORMS BECOME AN ORGANIZED LINE...THE LINE WILL RACE AHEAD OF THE COLD FRONT. MODELS HINT THAT A SECONDARY LINE OF AT LEAST SCT TSTMS COULD FORM ALONG THE ACTUAL FRONT A COUPLE/FEW HOURS AFTER THE INITIAL LINE. HOWEVER...THE INITIAL LINE WILL BE THE MAIN ONE TO BE CONCERNED ABOUT FOR SEVERE WEATHER... DESPITE THE TIME OF DAY (I.E. LATE EVENING/OVERNIGHT). AS FAR AS SEVERE POTENTIAL...TYPICALLY LINES OF STORMS DO NOT PRODUCE WIND DAMAGE ALONG THEIR ENTIRE LENGTH...ALTHOUGH GUSTY WINDS DO OCCUR ALONG MOST OF IT. THIS IS LIKELY TO BE THE CASE AGAIN TONIGHT. NEVERTHELESS...ORGANIZED BOW ECHOES ARE LIKELY TO OCCUR TONIGHT AND IN THIS CASE HAVE THE POTENTIAL TO PRODUCE SIGNIFICANT WIND DAMAGE (70-80 MPH WINDS) ALONG WITH ISOLATED/WIDELY SCATTERED TORNADOES. ANY TORNADOES WHICH FORM WILL LIKELY BE SHORT IN DURATION BUT COULD FORM QUICKLY AND DO DAMAGE. SOME CELLS MAY ALSO PRODUCE LARGE HAIL...BUT HAIL WILL BE A SECONDARY CONCERN TO THE WIND DAMAGE AND TORNADO POTENTIAL. ALSO...RAINFALL RATES WILL BE HIGH...BUT INTENSE RAINFALL WILL BE BRIEF SO NOT EXPECTING A WIDESPREAD FLOOD/ FLASH FLOOD EVENT AT THIS TIME...ALTHOUGH ISOLATED PROBLEMS MAY OCCUR. SINCE THE STORMS WILL BE OCCURRING LATE THIS EVENING INTO THE OVERNIGHT PERIOD...A MORE ATYPICAL TIME OF OCCURRENCE FOR US...AND SINCE PEOPLE MAY BE SLEEPING...PEOPLE ARE ENCOURAGED TO HAVE A DEFINITE PLAN OF ACTION AND KNOW WHAT TO DO WHEN WARNINGS ARE ISSUED OR WEATHER CONDITIONS DETERIORATE RAPIDLY. THE SEVERE POTENTIAL WILL NOT LAST LONG AT ANY ONE LOCATION SINCE STORMS WILL BE RACING EWD. AFTER THE COLD FRONT MOVES THROUGH WED MORNING...MODELS SHOW LOW-LEVEL CLOUDS HANGING IN DURING THE MORNING BEFORE CLEARING STARTS TO RETURN BY AFTERNOON AS SURFACE HIGH PRESSURE BUILDS IN. IN OTHER WORDS...IT WILL BE A MUCH CALMER DAY AFTER A POTENTIALLY BUSY AND STORMY NIGHT. .LONG TERM (WEDNESDAY NIGHT - TUESDAY)... DIDN/T SPEND AS MUCH TIME ON THE LONG TERM TODAY DUE TO SIGNIFICANT CONCERNS IN THE SHORT TERM...BUT WAS ABLE TO GIVE IT A QUICK LOOK. WEDNESDAY NIGHT INTO THURSDAY STILL LOOK PRIMARILY DRY. CAN/T COMPLETELY RULE OUT A STRAY POP-UP THUNDERSTORM THURSDAY AFTERNOON IN THE SOUTH SO WILL HOLD ON TO TINY POPS THEN. THUNDERSTORM COVERAGE STILL EXPECTED TO INCREASE THURSDAY NIGHT AS LOW PRESSURE MOVES ALONG THE KANSAS/OKLAHOMA BORDER AND A WARM FRONT SHARPENS FROM THE LOW TO THE CENTRAL APPALACHIANS. THUNDERSTORMS WILL CONTINUE THROUGH FRIDAY IN A MOIST UNSTABLE ATMOSPHERE WITH THE WARM FRONT NEARBY. WE MAY GET A BRIEF BREAK FRIDAY EVENING AS THE WARM FRONT LIFTS TO THE NORTH. THUNDERSTORMS WILL THEN RETURN LATE FRIDAY NIGHT INTO SATURDAY MORNING AS LOW PRESSURE MOVES BY TO OUR NORTHWEST AND SWINGS A COLD FRONT INTO THE REGION. MODELS CONTINUE TO GROW MORE SHEEPISH ABOUT THE CHANCES OF SEVERE WEATHER WITH THIS SYSTEM. A COUPLE OF DAYS AGO SEVERE WEATHER LOOKED LIKE A GOOD BET...BUT NOW THERE IS MORE UNCERTAINTY. THE FUTURE OF THIS SYSTEM IS IN QUESTION AS WELL. THE GFS STILL WANTS TO STALL IT OUT ROUGHLY ALONG THE OHIO RIVER KEEPING US WET. THE ECMWF STILL WANTS TO LIFT IT BACK NORTH OUT OF THE REGION KEEPING US DRY. THE GFS SOLUTION DOES HAVE SOME WEAK SUPPORT FROM THE GEM ENSEMBLE MEAN AND GFS ENSEMBLE MEAN. THE ECMWF HAS TRENDED JUST A BIT CLOSER TO THE GFS AND WE ARE CURRENTLY IN A WET PATTERN. THUS...WILL HOLD ON TO THE SMALL POPS WE ALREADY HAD GOING THROUGH SUNDAY NIGHT. MONDAY-MONDAY NIGHT STAND A DECENT CHANCE AT BEING RELATIVELY DRY...THEN A COLD FRONTAL PASSAGE IS ON TAP FOR TUESDAY. && .AVIATION (00Z TAF ISSUANCE)... A SQUALL LINE OF STRONG TO SEVERE TSTMS EXPECTED TO MOVE THRU ALL TAF SITES LATE THIS EVENING/EARLY WED MORNING...RESULTING IN ABOUT A 2-HR WINDOW OF LIFR TO IFR VSBY AND MVFR CIGS AS WELL AS WIND GUSTS 0F 40-50KTS. CDFNT WILL FOLLOW LINE AND MOVE THRU ALL TAF SITES BY 13Z. AFTERWARD...MVFR CIGS AND WEST WINDS WILL PREVAIL WITH CLEARING BY MIDDAY/EARLY AFTERNOON. && .LMK WATCHES/WARNINGS/ADVISORIES... KY...NONE. IN...NONE. && MESOSCALE......MJ SHORT TERM.....TWF LONG TERM......13 AVIATION.......DK/11
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LOUISVILLE KY 535 PM EDT TUE APR 19 2011 INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067- 070>078-081-082-200830- ORANGE IN-WASHINGTON IN-SCOTT IN-JEFFERSON IN-DUBOIS IN- CRAWFORD IN-PERRY IN-HARRISON IN-FLOYD IN-CLARK IN-HANCOCK KY- BRECKINRIDGE KY-MEADE KY-OHIO KY-GRAYSON KY-HARDIN KY-BULLITT KY- JEFFERSON KY-OLDHAM KY-TRIMBLE KY-HENRY KY-SHELBY KY-FRANKLIN KY- SCOTT KY-HARRISON KY-SPENCER KY-ANDERSON KY-WOODFORD KY- FAYETTE KY-BOURBON KY-NICHOLAS KY-NELSON KY-WASHINGTON KY- MERCER KY-JESSAMINE KY-CLARK KY-LARUE KY-MARION KY-BOYLE KY- GARRARD KY-MADISON KY-BUTLER KY-EDMONSON KY-HART KY-GREEN KY- TAYLOR KY-CASEY KY-LINCOLN KY-LOGAN KY-WARREN KY-SIMPSON KY- ALLEN KY-BARREN KY-MONROE KY-METCALFE KY-ADAIR KY-RUSSELL KY- CUMBERLAND KY-CLINTON KY- 535 PM EDT TUE APR 19 2011 /435 PM CDT TUE APR 19 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL INDIANA AND CENTRAL KENTUCKY. .DAY ONE...TONIGHT. SEVERE WEATHER OUTBREAK EXPECTED LATE THIS EVENING AND OVERNIGHT OVER SOUTH CENTRAL INDIANA AND CENTRAL KENTUCKY. A COLD FRONT WILL APPROACH THE REGION LATE TONIGHT. THUNDERSTORMS WILL MOVE INTO THE WESTERN PORTIONS OF THE AREA AROUND 10 PM EDT TONIGHT. THE STORMS WILL RACE EASTWARD BETWEEN 10 PM AND 4 AM ACROSS THE FORECAST AREA. THE STORMS WILL BE CAPABLE OF PRODUCING DAMAGING WINDS OVER 60 MPH...WITH ISOLATED DESTRUCTIVE WINDS OF 70 TO 80 MPH. ISOLATED TORNADOES ARE ALSO EXPECTED...ALONG WITH SOME HAIL. HEAVY RAINFALL WITH TOTALS OF 1 TO 1.5 INCHES WITH LOCALLY HIGHER AMOUNTS...IS ALSO LIKELY. SINCE THESE SEVERE AND POTENTIALLY FLASH FLOOD PRODUCING STORMS ARE EXPECTED TO AFFECT THE OUTLOOK AREA AT NIGHT...WE HIGHLY ENCOURAGE YOU TO SET YOUR NOAA WEATHER RADIO TO ALERT MODE SO THAT YOU CAN BE AWAKENED IN THE EVENT THAT A WARNING IS ISSUED WHILE YOU ARE ASLEEP. MANY SEVERE WEATHER AS WELL AS FLASH FLOOD FATALITIES OCCUR LATE AT NIGHT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. A FEW LINGERING THUNDERSTORMS WILL BE POSSIBLE IN THE BLUEGRASS AND LAKE CUMBERLAND REGIONS EARLY WEDNESDAY MORNING BUT WILL MOVE QUICKLY OFF TO THE EAST. SCATTERED STORMS WILL RETURN TO THE AREA THURSDAY NIGHT AND FRIDAY AHEAD OF THE NEXT SYSTEM...WHICH MAY BRING A ROUND OF STRONG STORMS MAINLY FROM FRIDAY NIGHT INTO SATURDAY. THIS SYSTEM HAS LOST SOME OF ITS POTENCY IN RECENT FORECASTS...STAY TUNED TO SEE HOW THIS NEXT SYSTEM SHAPES UP. SCATTERED THUNDERSTORMS WILL CONTINUE TO BE POSSIBLE THROUGH THE REST OF THE WEEKEND AND INTO EARLY NEXT WEEK. HEAVY RAINS FROM THE STORMS ARE EXPECTED TO CAUSE RISING WATER LEVELS ON AREA RIVERS...INCLUDING THE OHIO...AND MAY RESULT IN FLASH FLOODS AND AREAL FLOODING AS WELL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS REQUESTED FOR TONIGHT AND MAY BE NEEDED LATE IN THE WEEK THROUGH THE WEEKEND. KIRKPATRICK
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
1026 PM EDT TUE APR 19 2011
INZ076-083-084-089-KYZ023-024-026-200315-
BRECKINRIDGE-CRAWFORD-DUBOIS-HANCOCK-OHIO-ORANGE-PERRY-
1026 PM EDT TUE APR 19 2011
...SEVERE THUNDERSTORMS WITH DESTRUCTIVE WINDS...DANGEROUS
LIGHTNING...HEAVY RAIN...AND SMALL HAIL APPROACHING...
AT 1017 PM EDT/917 PM CDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
WAS TRACKING SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM
SOUTHERN ILLINOIS INTO WESTERN KENTUCKY...AND MOVING EAST AT 65 MPH.
FREQUENT CLOUD TO GROUND LIGHTNING...TORRENTIAL RAIN...SMALL
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH ARE EXPECTED WITH
THESE STORMS.
* BY 11PM CDT...THESE STORMS WILL ALSO IMPACT...
HAWESVILLE...
TELL CITY...
PAOLI...
JASPER...
ENGLISH...
MILLERSPORT...
DUFF AND HOLLAND...
THESE STORMS WILL AFFECT INTERSTATE 64 IN INDIANA BETWEEN MILE
MARKERS 74 AND 86.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE WINDS WITH THESE STORMS CAN TOPPLE WEAKLY ROOTED TREES...AND
DOWN POWER LINES. TAKE PRECAUTIONS NOW TO SECURE TRASH CANS...LAWN
FURNITURE AND OTHER LOOSE OUTDOOR OBJECTS. MOTORISTS IN HIGH PROFILE
VEHICLES SHOULD USE CAUTION. STAY INDOORS!
IF YOU ARE IN THE PATH OF THESE STORMS...SEEK SHELTER INDOORS AND
STAY AWAY FROM WINDOWS. STAY TUNED TO NOAA ALL HAZARDS RADIO...
WEATHER.GOV/LOUISVILLE ON THE INTERNET...OR LOCAL MEDIA FOR LATER
UPDATES AND POSSIBLE WARNINGS.
&&
LAT...LON 3851 8708 3853 8670 3869 8669 3869 8648
3833 8638 3811 8642 3813 8647 3807 8644
3805 8650 3801 8645 3767 8652 3765 8687
3779 8684 3783 8692 3788 8691 3789 8698
3793 8699 3801 8678 3819 8680 3821 8708
TIME...MOT...LOC 0222Z 251DEG 64KT 3853 8850 3802 8816
3765 8823
ALThe Evansville,IN radar (KVWX), 68 km away, was scanning. The volume nearest the first event began at 03:22 UTC.
28 thunderstorm wind, 21 tornado. Local standard time, as filed.
An NWS storm survey confirmed an EF-0 tornado with wind speeds of 80 mph north of Huntingburg. A large swath of hardwood trees was snapped and uprooted. In addition to tornado damage, straight-line winds up to hurricane force were found in the area.
An NWS storm survey confirmed an EF-1 tornado with wind speed estimated at 100-105 mph north of Ireland. A well-constructed 75-foot tall grain silo had the top 40 feet sheared off. A 40ft x 50ft outbuilding in the vicinity of the silo was destroyed, its siding thrown 500 yards downwind. In addition to the tornado, straight-line wind damage was observed. Two hog buildings were destroyed and a grain silo was shifted on its foundation.
The gust was measured at the Jasper Middle School.
An EF-0 tornado with winds speeds up to 80 mph was confirmed near Haysville. At the beginning point of this tornado a few small trees, some dead, were blown over and branches were blown off of some of the trees. Several trees were blown over in Haysville. The most intense damage occurred as the tornado lifted east of Haysville in the woods along Indiana 56. At that point several trees up to two feet in diameter were blown down.
An NWS storm survey confirmed an EF-1 tornado with wind speeds estimated to be 95 mph near Saint Anthony. Along the path, hardwood trees were snapped and uprooted. A residence north of Indiana 64 was damaged.
An NWS storm survey confirmed an EF-2 tornado with wind speeds of 115-120 mph touched down near Bretzville. It then tracked to the northeast, ending north of Saint Anthony. A large number of trees were snapped and uprooted. Several barns and outbuildings were destroyed along the path as well.
Numerous trees and power lines were down across the city.
Overturned mobile homes were reported in the city of Jasper.
A trained spotter reported a measured gust of 64 mph.
An NWS storm survey confirmed an EF-2 tornado near Roland with estimated wind speeds of up to 115 mph. Numerous trees were uprooted and snapped in a convergent pattern. In one concentrated spot two dozen trees were snapped off. A house had its windows blown in on its southwest side. A well constructed cabin lost some shingles. A very well constructed large barn lost its metal roof, which was wrapped into tree tops 200 yards downwind. A wood outbuilding was destroyed. Straight line winds increased the total damage path width to about 0.6 mile.
An NWS storm survey confirmed an EF1 tornado with estimated wind speed up to 100 mph. This tornado touched down just west of Tony's Marina near Indiana 145. Trees were uprooted and snapped. A large metal barn with cinder block walls was destroyed. The tornado then crossed Route 145 and moved in to Tony's Marina. Three metal outbuildings were damaged or destroyed. One of the buildings had its doors blown in...another had its metal roof peeled back...and the third was leveled and blown 300 yards downwind. Trees were uprooted in a convergent pattern. Some trees fell on power poles, causing the poles to snap. A pontoon boat was flipped over.
An NWS storm survey confirmed an EF-1 tornado with wind speeds up to 110 mph. This tornado touched down near the intersection of Indiana 145 and Base Line Road, where it destroyed a metal-roofed barn. Trees were uprooted and snapped. At a house on Base Line Road the front porch was ripped off and deposited in the back yard. A cluster of large, tall evergreens was snapped off and strewn chaotically in all directions.
Trees were reported down.
An NWS storm survey confirmed an EF-0 tornado with estimated wind speeds up to 80 mph. Along the path, several trees were uprooted along W CR390S. A couple of trees were snapped. A metal roof was peeled off of a small outbuilding.
Trees and power lines were blown down across the city.
An NWS storm survey confirmed straight line winds uprooted trees and blew half a metal roof off a house. Winds were estimated to be 90 mph.
A trained spotter reported a measured gust of 60 mph.
A trained spotter reported a measured wind gust of 63 mph.
A trained spotter reported a measured wind gust of 64 mph.
An NWS storm survey found sporadic straight line wind damage across southern Crawford and west central Harrison counties. Numerous trees were damaged, the eaves on two houses as well as siding and shingles were blown off, and sheet metal was blown off a barn. Winds were estimated to be up to 70 mph.
An NWS storm survey confirmed an EF-1 tornado with wind speeds up to 100 mph. The tornado touched down at the intersection of West Batts Rd. and John Batt Road, where a grain bin was destroyed and several trees were blown over. Just southwest of the Mount Tabor Road/West Washington Road intersection the twister destroyed two silos and a 20ft x 30ft outbuilding. A single story house also suffered severe damage at that location. At the end of the damage path a house had its roof partially torn off and gravel from the driveway was lifted and pelted into the side of the house.
An NWS storm survey confirmed an EF-0 tornado with winds up to 75 mph. This tornado traveled from the intersection of West Washington Road and Batt Road to just north of Mount Tabor Road. Along its path a silo and two barns were damaged. Several trees were knocked down or snapped.
A trained spotter reported a measured wind gust of 63 mph.
A trained spotter reported trees were blown down.
An NWS storm survey confirmed straight line wind damage with winds up to 70 mph across Crawford and Harrison counties. Numerous trees were damaged and two houses lost siding, shingles, and eaves. Sheet metal was blown off of a barn. Most of the damage was found along Indiana 62.
An NWS storm survey confirmed an EF-0 tornado with wind speeds up to 80 mph. This tornado touched down along Jim Day Road about a quarter mile south of Lewellen Road where a 30ft x 40ft outbuilding was destroyed and its roof thrown about 75 yards to the north and east. The tornado ended just northeast of Lewellen Road where a house suffered roof damage, a 30ft x 50ft shed was destroyed, and a small grain bin was twisted and thrown 100 feet.
A trained spotter reported trees were blown down.
An NWS storm survey confirmed an EF-0 tornado with wind speeds estimated at 65 mph. The path length was approximately 0.3 miles with a width of 50 yards. Numerous hardwood and softwood trees were either snapped or uprooted along the northern bank of Indian Creek.
Trees and power lines were blown down.
Trees and power lines were blown down.
An NWS storm survey confirmed an EF-0 tornado touched down in Washington county approximately 4 miles SSW of Little York. The tornado continued for 13 miles into Scott county where it finally lifted 5 miles north northeast of Austin. Maximum wind speeds were estimated to be 80 mph. Several trees were snapped or uprooted and a roof was damaged near North Rutherford Hollow Road. Mainly tree damage was observed along the rest of the path.
A trained spotter reported trees were blown down.
A roof was blown off a house in eastern New Albany on Vincennes St.
A tree was blown down on to a garage on South Lake Rd.
An NWS storm survey confirmed an EF-0 tornado touched down in Washington county approximately 4 miles SSW of Little York. The tornado continued for 13 miles into Scott county where it finally lifted 5 miles north northeast of Austin. Maximum wind speeds were estimated to be 80 mph. Mainly tree damage was observed along the path in Scott county..
An NWS storm survey confirmed an EF-0 tornado with wind speeds up to 80 mph touched down in Scottsburg, tearing off exterior wall panels of a 3-story Holiday Inn, as well as causing roof damage and snapping numerous large limbs in an adjacent residential area. The tornado continued to the northeast into Jefferson county where it lifted approximately 2.5 miles east of Deputy. Near Indiana 203 and North Bethlehem Road in Scott County several trees were down and agricultural buildings and residences experienced roof damage.
Trees were blown down.
A house on Sharon Dr. had a tree down.
An NWS storm survey confirmed straight line wind damage with winds estimated to be 60-65 mph. The most intense damage with this event was observed at a car wash at the junction of Vincennes Street and Elm Street where the top of the car wash was blown down. Many large, old, shallow rooted trees were blown over in a west to east direction along Elm Street. Sporadic straight line winds also damaged trees and a few chimneys along Oak Street and Culbertson Avenue as well.
An NWS storm survey confirmed an EF-0 tornado with wind speeds up to 80 mph moved into Jefferson County from Scott County. The tornado, which touched down in Scottsburg, crossed the county line a half mile north of Highway 256 southwest of Deputy. it continued to the northeast over rural countryside, snapping and uprooting numerous trees and heavily damaging a hog barn and other outbuildings before lifting approximately 2.5 miles east of Deputy along Deputy Pike Road.
A trained spotter reported a measured wind gust of 64 mph.
Damage to a barn and garage near state road 3 in Deputy was reported. Trees and power lines were also downed county-wide in Jefferson county.
An NWS storm survey confirmed an EF-1 tornado with wind speeds up to 90 mph. The tornado started in Sunset Trailer Park where about two dozen trailers were damaged. Several trailers were moved off of their foundations and had roof damage. One trailer's roof was thrown 65 yards. Trees and power lines were damaged as well. The tornado then weakened slightly to 80 mph as it moved northeast into a subdivision damaging several small trees, sheds, and roofs. A trampoline was thrown and wrapped around a shed and a tree. More tornado damage was then found at the end of a subdivision right behind a church off of Holmans Lane. The south side of the church was completely blown out. Sheds were destroyed and trees uprooted. Insulation was thrown from north to southeast. Across Holmans Lane tree and shingle damage was found. The path ended near Indiana 62.
An NWS storm survey confirmed an EF-0 tornado with wind speeds up to 75 mph. The tornado snapped trees and damaged a shed and shingles. The tornado began on the east side of the Sunset Trailer Park and ended at Charlestown Pike.
A trained spotter reported a measured gust of 62 mph.
Trees were blown down county-wide. Some were blocking roads.
Trees were blown down between Deputy and Lancaster.
The tornado touched down near the intersection of Indiana Highway 62 and E400N, severely damaging several outbuildings. A 2x4 from one of the outbuildings was driven through the exterior wall and into the kitchen of a home 1/10 mile away. The skipping storm then raced northeast across hilly rural terrain. Dozens of large hardwood trees were snapped or uprooted at a Girl Scout Campground on Geyman Hill Road. After exiting the campground, the tornado then destroyed a large barn and damaged the roofs of nearby homes and other outbuildings, as well as uprooting more trees. It lifted shortly after crossing China-Manville Road.
An NWS storm survey confirmed an EF-1 tornado with winds up to 100 mph. This fast-moving tornado began along U.S. 421 one half mile south of the Jefferson-Ripley County line, then raced eastward, doing minor damage to a home, sucking the door out of a large garage and taking off much of the roof of a large tobacco barn. The most extensive damage was done near the end of the tornado's path where it destroyed a mobile home, took the roof off a cinder block outbuilding, and did extensive damage to the roofs of several large barns.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2011Every state in 2011This day in weather historyThe tornado archive for Indiana, 2011Warnings in Indiana, April 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 304918, 304920, 303357, 304922, 304924, 304927, 303359, 303361, 303362, 305337, 305339, 305340, 303364, 305341, 303366, 303367, 303368, 303369, 303370, 303373, 305346, 305347, 303374, 303375, 305372, 305348, 303376, 305342, 303378, 303379, 305344, 303380, 303381, 303382, 305345, 305349, 303383, 303384, 303387, 305350, and more.