Indiana, 2011

Tornadoes and Flash Flooding in Indiana, April 19 to 20, 2011

April 19 to 20, 2011 · NWS IND · 53 events in 25 counties and zones

A powerful storm system pushed across the region on the evening of the 19th of April. Severe thunderstorms developed and moved across the area.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
$951,000
Crop damage
None recorded
Events
53

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.

What happened

The episode as NWS IND wrote it up.

A powerful storm system pushed across the region on the evening of the 19th of April. Severe thunderstorms developed and moved across the area. These evening storms brought widespread wind damage, heavy rain, and a couple of tornadoes. Five tornadoes touched down in central Indiana from this event. Heavy rainfall also caused pockets of flash flooding to occur.

What forecasters said that day

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 Indianapolis, IN wrote its last area forecast discussion before the first event at Apr 19, 7:40 PM EST, 26 minutes earlier.

Area forecast discussion, Apr 19, 7:40 PM EST, 26 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
840 PM EDT TUE APR 19 2011

.UPDATE...

UPDATED MESO DISCUSSION.

THE AVIATION SECTION HAS BEEN UPDATED BELOW.

&&

.MESO UPDATE...

BOUNDARY LIES WEST TO EAST FROM JUST SOUTH OF LAF TO JUST SOUTH OF
MIE.  BOW ECHO SIGNATURE IS MOVING EASTWARD AT 53 KT WITH A HISTORY
OF 70 MPH WINDS.  ACTIVITY WILL BE MOVING ALONG/JUST SOUTH OF THE
BOUNDARY NEXT SEVERAL HOURS.  SOUTHWEST OF THE BOW ARE INDIVIDUAL
CELLS ALONG A LINE.  THIS ACTIVITY IS MOVING SLOWER AND WILL HAVE TO
BE MONITORED DURING THE NEXT 3 HOURS.

&&

.SYNOPSIS...

A POTENT STORM SYSTEM WILL PASS THROUGH THE REGION THIS EVENING
AND TONIGHT...BRINGING WIDESPREAD THUNDERSTORMS WITH THE POTENTIAL
FOR SIGNIFICANT SEVERE WEATHER...IN ADDITION TO HEAVY RAIN AND
FLASH FLOODING...ESPECIALLY ALONG THE COLD FRONT WHICH WILL PASS
THROUGH THE AREA AFTER MIDNIGHT. SURFACE HIGH PRESSURE WILL BRING
A RESPITE FROM PRECIPITATION FROM WEDNESDAY THROUGH
THURSDAY...BEFORE ANOTHER SYSTEM PUSHING NORTHEAST OUT OF THE
PLAINS STATES LATE IN THE WEEK...SURPRISINGLY SIMILAR TO THE
CURRENT ONE...BRINGS THUNDERSTORMS BACK TO THE AREA AGAIN THURSDAY
NIGHT THROUGH FRIDAY NIGHT. THIS SYSTEM MAY LAY OUT ANOTHER
QUASISTATIONARY BOUNDARY WHICH WOULD KEEP THUNDERSTORM CHANCES IN
THE FORECAST THROUGHOUT THE WEEKEND AND INTO EARLY NEXT WEEK.

&&

.NEAR TERM /THIS AFTERNOON AND TONIGHT/...

FOCUS IS ON POTENTIALLY SIGNIFICANT SEVERE WEATHER EVENT ACROSS
THE REGION TONIGHT. MORNING CONVECTION ACROSS THE AREA
SIGNIFICANTLY SUPPRESSED/DELAYED WARM FRONTAL NORTHWARD PROGRESS
TODAY...BUT THE BOUNDARY IS FINALLY STARTING TO SURGE NORTH IN
EARNEST. FORECAST AND SPECIAL 18Z SOUNDINGS ACROSS THE REGION
DEPICT A SIGNIFICANT CAP /8-10C AT 700 MB...WITH A SUBSTANTIAL
ELEVATED WARM LAYER OF 15C AT 750 MB/ ALONG THE BOUNDARY AND INTO
THE WARM SECTOR. THIS HAS SUPPRESSED CONVECTION IN WHAT IS A VERY
POTENTIALLY UNSTABLE ATMOSPHERE /MOST UNSTABLE CAPE VALUES UP TO
4000 J/KG SOUTH OF THE BOUNDARY/. THUS...HAVE LOWERED EXPECTATIONS
FOR THE REMAINDER OF THE AFTERNOON. ANY THUNDERSTORMS THAT CAN
FIRE COULD QUICKLY BE SEVERE...BUT NOW THINK THAT BEST CHANCE WILL
BE WITH STRONGER FORCING ALONG THE COLD FRONT THIS EVENING AND
OVERNIGHT.

BOTH LOW LEVEL AND DEEP LAYER SHEAR REMAIN SUBSTANTIAL...AND THUS
REGARDLESS IF A LINEAR STORM MODE IS DOMINANT...TORNADO THREAT
WILL REMAIN HIGH...ESPECIALLY IN THE VICINITY OF THE WARM FRONT
AND AHEAD OF THE SURFACE LOW WHERE THIS LOW LEVEL SHEAR WILL BE
MAXIMIZED. IN ADDITION...VERY STRONG LOW LEVEL DYNAMICS WILL
ENHANCE THE DAMAGING WIND THREAT AS WELL. LARGE HAIL WILL ALSO
REMAIN A CONCERN...ESPECIALLY IN ANY ROTATING STORMS. REFERENCE
HYDRO DISCUSSION BELOW FOR FLASH FLOOD THREAT.

USED A CONSENSUS APPROACH TO TEMPS TONIGHT WITH EXTREMELY STRONG
TEMPERATURE GRADIENTS IMPACTING THE FORECAST AREA. EXPECT HIGH
TEMPS IN MANY PLACES TO BE REACHED IN THE LATE AFTERNOON OR
EVENING...WITH A STRONGLY NONDIURNAL TEMPERATURE PROGRESSION
OVERNIGHT AS THE FRONT PUSHES THROUGH.

&&

.SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/...

FOCUS IS ON SKY COVER AND TEMPS THROUGH THURSDAY...WITH
THUNDERSTORMS POSSIBLE THURSDAY NIGHT. GUIDANCE IS SIMILAR AND A
BLEND IS USED.

A SIGNIFICANT LOW LEVEL INVERSION REMAINS IN THE WAKE OF THE COLD
FRONT...WHICH SHOULD BE PASSING OUT OF THE FORECAST AREA BY 12Z
WEDNESDAY. AMPLE MOISTURE REMAINS TRAPPED BELOW THIS INVERSION FOR
MUCH OF TOMORROW...WHICH SHOULD KEEP SKIES CLOUDY TO MOSTLY CLOUDY
THROUGH AT LEAST MIDDAY TOMORROW. THIS IN ADDITION TO GOOD COLD
ADVECTION WILL KEEP TEMPS DOWN TOMORROW. ALLOWED FOR SOME
RECOVERY...ESPECIALLY AS SOME CLEARING COULD OCCUR IN THE
AFTERNOON AS THE SURFACE RIDGE PUSHES INTO THE AREA...ALLOWING A
BIT OF SUNSHINE TO BREAK THROUGH. A BLEND OF MAV AND MET DEPICTS
THIS BEST.

THROUGH THE REMAINDER OF THE SHORT TERM...EXPECT PARTLY CLOUDY
SKIES WITH MID OR HIGH CLOUDINESS...WITH CLOUDS INCREASING MAJORLY
THURSDAY AFTERNOON AND NIGHT AHEAD OF THE NEXT SYSTEM. USED A
BLEND OF MAV/MET AS THIS BEST DEPICTED LIMITED WARMING THROUGH THE
REMAINDER OF THE SHORT TERM AS GOOD WARM ADVECTION DOES NOT GET
GOING UNTIL VERY LATE IN THE PERIOD.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...

NOT MUCH CHANGE TO ONGOING EXTENDED FORECAST...WITH THE MAIN FOCUS
BEING ON THE NEXT STORM SYSTEM EJECTING FROM THE ROCKIES THURSDAY
NIGHT AND FRIDAY. THERE REMAINS GOOD AGREEMENT BETWEEN MID/LONG
RANGE MODEL SOLUTIONS ON THE TIMING OF THIS SYSTEM...AND BEARS A
RESEMBLANCE TO THE STORM SYSTEM CURRENTLY AFFECTING THE AREA. THE
00Z ECMWF SOLUTION TAKES THE SURFACE LOW NORTHEAST ACROSS THE
FORECAST AREA FRIDAY NIGHT. HOWEVER...THE 12Z GFS TAKES A FURTHER
NORTH TRACK WITH THE LOW. REMAINED FAIRLY CONSISTENT WITH PREVIOUS
FORECAST...TRENDING TOWARD THE ECMWF. ORGANIZED CONVECTION MAY AGAIN
BE A POSSIBILITY WITH THIS STORM SYSTEM AS WELL...AS DYNAMICS ONCE
AGAIN APPEAR STRONG. AN ASSOCIATED FRONTAL BOUNDARY REMAINS
STATIONED NEAR THE AREA THROUGH THE REMAINDER OF THE
FORECAST...ALLOWING FOR REPEAT THUNDERSTORM CHANCES THROUGHOUT THE
EXTENDED. DISAGREEMENT BETWEEN MODEL GUIDANCE FROM LATE DAY FIVE ON
DOES NOT PROVIDE MUCH IN THE WAY OF CONFIDENCE WITH RESPECT TO THE
POSITIONING OF THIS FRONT. THUS...KEPT LOW CHANCE POPS GOING.

&&

.AVIATION /DISCUSSION FOR 200000Z TAFS/...

MAINLY MVFR CONDITIONS EXPECTED THIS TAF PERIOD...WITH IFR
CONDITIONS LIKELY IN THUNDERSTORMS EARLY IN THE PERIOD.

WARM FRONT IS MAKING GOOD PROGRESS NORTH AND EVEN EXPECT A PERIOD OF
SOUTHERLY WINDS AT KLAF. CURRENT THINKING IS FOR A LINE OF STORMS TO
MOVE ACROSS THE SITES IN ROUGHLY THE 01Z TO 05Z TIME FRAME...WITH
PERHAPS SCATTERED STORMS DEVELOPING AHEAD OF THAT LINE. SEVERE
STORMS WITH GUSTS OVER 50KT AND LARGE HAIL ARE POSSIBLE.

AFTER THE LINE MOVES THROUGH EXPECT MVFR CEILINGS TO MOVE IN AND
THEN LOWER TO NEAR IFR OVERNIGHT. A GRADUAL LIFTING OF THE CEILINGS
WILL OCCUR DURING THE DAY WEDNESDAY...WITH PERHAPS VFR RETURNING
AFTER 18Z.

WINDS WILL BE GUSTY OUTSIDE OF THUNDERSTORMS AND VARIABLE NEAR THEM.
WINDS MAY BE ESPECIALLY VARIABLE AT KLAF THIS EVENING AS THE SURFACE
LOW PASSES NEARBY.

&&

.HYDROLOGY...

FLOODING PROBLEMS...SIGNIFICANT IN SOME AREAS...HAVE ALREADY
OCCURRED IN PORTIONS OF THE FORECAST AREA...ESPECIALLY IN THE FAR
SOUTHERN FORECAST AREA WHERE UP TO FOUR INCHES OF RAIN FELL LAST
NIGHT. WITH EXTREMELY STRONG LOW LEVEL MOISTURE
TRANSPORT/DYNAMICS...AND THE POTENTIAL FOR SIGNIFICANT RAINFALL ON
ALREADY WET GROUND...ISSUED A FLASH FLOOD WATCH THIS MORNING WHICH
WILL CONTINUE THROUGH TOMORROW MORNING. FLOODING PROBLEMS MAY
DEVELOP VERY QUICKLY IN THOSE AREAS THAT HAVE ALREADY RECEIVED
RAINFALL...AND ESPECIALLY IN URBAN AREAS WHERE DRAINAGE IS A PROBLEM.

.IND WATCHES/WARNINGS/ADVISORIES...

FLASH FLOOD WATCH THROUGH WEDNESDAY MORNING FOR INZ021-028>031-
035>049-051>057-060>065-067>072.

&&

MESO UPDATE...DWM
SYNOPSIS...NIELD
NEAR TERM...NIELD
SHORT TERM...NIELD
LONG TERM....MRD
AVIATION...50
HYDROLOGY...NIELD
Hazardous weather outlook, Apr 19, 3:34 PM EST, 4 hours 32 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
434 PM EDT TUE APR 19 2011

INZ021-028>031-035>049-051>057-060>065-067>072-201500-
CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY-
BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-VERMILLION-PARKE-
PUTNAM-HENDRICKS-MARION-HANCOCK-HENRY-VIGO-CLAY-OWEN-MORGAN-
JOHNSON-SHELBY-RUSH-SULLIVAN-GREENE-MONROE-BROWN-BARTHOLOMEW-
DECATUR-KNOX-DAVIESS-MARTIN-LAWRENCE-JACKSON-JENNINGS-
434 PM EDT TUE APR 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA.

.DAY ONE...TONIGHT.

WEATHER HAZARDS EXPECTED INCLUDE:

TORNADOES...
HEAVY RAIN RESULTING IN FLASH FLOODING...
DAMAGING STRAIGHT LINE WINDS...AND LARGE HAIL.
LIGHTNING IS A THREAT FROM ANY THUNDERSTORM.

AREAS AFFECTED AND TIMING: WIDESPREAD SEVERE WEATHER IS EXPECTED
BEGINNING THIS EVENING ACROSS CENTRAL INDIANA AS A COLD FRONT
MOVES INTO OUR REGION. A LINE OF THUNDERSTORMS ARE EXPECTED TO
ACCOMPANY THE FRONT. THESE STORMS MAY PRODUCE DAMAGING STRAIGHT
LINE WINDS. AN ISOLATED TORNADO WITH THESE STORM CANNOT BE RULED
OUT EITHER. AGAIN...VERY HEAVY RAIN MAY RESULT IN FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

THERE IS A CHANCE OF STORMS THURSDAY NIGHT THROUGH TUESDAY. IT IS
TOO EARLY TO DETERMINE IF THESE STORMS WILL BE SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS QUITE LIKELY BEGINNING EARLY EVENING AND
CONTINUING TO WELL AFTER MIDNIGHT. SPOTTERS WILL MOST LIKELY BE
NEEDED DURING THE AFTERNOON AND EVENING HOURS.

&&

MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND
CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL
LOWERCASE)

JH

In the hours before

Local storm report, Apr 19, 3:27 PM EST, 4 hours 39 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
427 PM EDT TUE APR 19 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0319 PM     HEAVY RAIN       TERRE HAUTE             39.47N 87.38W
04/19/2011  M1.63 INCH       VIGO               IN   TRAINED SPOTTER

            STORM TOTAL OVER PAST 18 HOURS

&&

HEROLD
Local storm report, Apr 19, 3:33 PM EST, 4 hours 33 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
433 PM EDT TUE APR 19 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0429 PM     HEAVY RAIN       2 S CASTLETON           39.88N 86.05W
04/19/2011  M2.79 INCH       MARION             IN   CO-OP OBSERVER

            STORM TOTAL SINCE MIDNIGHT

&&

HEROLD

The radar

The Indianapolis radar (KIND), 113 km away, was scanning. The volume nearest the first event began at 01:07 UTC.

Open the radar archive at this moment

Event by event

37 thunderstorm wind, 8 tornado, 6 hail, 2 flash flood. Local standard time, as filed.

Hail, Warren

When
April 19, 8:06 PM EST to 8:08 PM EST
Where
Warren County, West Lebanon
Measured
0.88 in hail
Reported by
Emergency Manager
Coordinates
40.270, -87.380

Pea to nickel-sized hail was reported in this location.

Tornado, Vermillion

When
April 19, 8:10 PM EST to 8:16 PM EST
Where
Vermillion County, 2.72 mi SW of Cayuga to 2.36 mi ESE of Cayuga
Rating
EF1
Path length
4.02 mi
Path width
100 yd
Continued into
Parke, In (IND)
Property damage
$30,000
Reported by
NWS Storm Survey
Coordinates
39.898, -87.480

An EF-1 tornado touched down at 9:10PM EDT in central Vermillion County and traveled northeast through northwest Parke, southeast Fountain, and west-central Montgomery Counties. This tornado formed 2.72 miles southwest of Cayuga and tracked northeast for approximately 4 miles before exiting Vermillion County about 2.36 miles east, southeast of Cayuga at 9:16PM EDT. The tornado continued northeast into Parke County, around 1.51 miles west of Waterman, for another 8.6 miles before leaving the county 3.53 miles northeast of Sylvania at 9:22PM EDT. The tornado continued northeast into Fountain County, around 1.69 miles east, southeast of Kingman, for another 9.3 miles before pushing into Montgomery County at 9:32PM EDT, 2.75 miles northwest of Alamo, for another 9.23 miles and dissipating about 1.89 miles northwest of Crawfordsville at 9:40PM EDT. Multiple trees and power lines were reported down along the path, as well as siding and shingles ripped off homes. A shed was destroyed in Vermillion County and another structure sustained damage in Parke County. The tornado was rated an EF-1 along most of its path, except in Montgomery County where EF-0 damage was found. The maximum width along the path was 100 yards.

Tornado, Parke

When
April 19, 8:16 PM EST to 8:22 PM EST
Where
Parke County, 1.51 mi W of Waterman to 3.53 mi NE of Sylvania
Rating
EF1
Path length
8.63 mi
Path width
100 yd
Continued into
Fountain, In (IND)
Property damage
$25,000
Reported by
NWS Storm Survey
Coordinates
39.918, -87.408

An EF-1 tornado touched down at 9:10PM EDT in central Vermillion County and traveled northeast through northwest Parke, southeast Fountain, and west-central Montgomery Counties. This tornado formed 2.72 miles southwest of Cayuga and tracked northeast for approximately 4 miles before exiting Vermillion County about 2.36 miles east, southeast of Cayuga at 9:16PM EDT. The tornado continued northeast into Parke County, around 1.51 miles west of Waterman, for another 8.6 miles before leaving the county 3.53 miles northeast of Sylvania at 9:22PM EDT. The tornado continued northeast into Fountain County, around 1.69 miles east, southeast of Kingman, for another 9.3 miles before pushing into Montgomery County at 9:32PM EDT, 2.75 miles northwest of Alamo, for another 9.23 miles and dissipating about 1.89 miles northwest of Crawfordsville at 9:40PM EDT. Multiple trees and power lines were reported down along the path, as well as siding and shingles ripped off homes. A shed was destroyed in Vermillion County and another structure sustained damage in Parke County. The tornado was rated an EF-1 along most of its path, except in Montgomery County where EF-0 damage was found. The maximum width along the path was 100 yards.

Tornado, Fountain

When
April 19, 8:22 PM EST to 8:32 PM EST
Where
Fountain County, 1.69 mi ESE of Kingman to 7.27 mi SSE of Range Rd
Rating
EF1
Path length
9.27 mi
Path width
100 yd
Continued into
Montgomery, In (IND)
Property damage
$15,000
Reported by
NWS Storm Survey
Coordinates
39.957, -87.253

An EF-1 tornado touched down at 9:10PM EDT in central Vermillion County and traveled northeast through northwest Parke, southeast Fountain, and west-central Montgomery Counties. This tornado formed 2.72 miles southwest of Cayuga and tracked northeast for approximately 4 miles before exiting Vermillion County about 2.36 miles east, southeast of Cayuga at 9:16PM EDT. The tornado continued northeast into Parke County, around 1.51 miles west of Waterman, for another 8.6 miles before leaving the county 3.53 miles northeast of Sylvania at 9:22PM EDT. The tornado continued northeast into Fountain County, around 1.69 miles east, southeast of Kingman, for another 9.3 miles before pushing into Montgomery County at 9:32PM EDT, 2.75 miles northwest of Alamo, for another 9.23 miles and dissipating about 1.89 miles northwest of Crawfordsville at 9:40PM EDT. Multiple trees and power lines were reported down along the path, as well as siding and shingles ripped off homes. A shed was destroyed in Vermillion County and another structure sustained damage in Parke County. The tornado was rated an EF-1 along most of its path, except in Montgomery County where EF-0 damage was found. The maximum width along the path was 100 yards.

Hail, Fountain

When
April 19, 8:25 PM EST to 8:27 PM EST
Where
Fountain County, Kingman
Measured
1 in hail
Reported by
Trained Spotter
Coordinates
39.970, -87.280

Thunderstorm Wind, Parke

When
April 19, 8:25 PM EST
Where
Parke County, 1.45 mi SW of Hudnut
Measured
52 kt (60 mph) estimated gust
Property damage
$500
Reported by
Trained Spotter
Coordinates
39.656, -87.401

Tree limbs were reported down in Clinton due to damaging thunderstorm wind gusts. Marble sized hail was also reported.

Tornado, Montgomery

When
April 19, 8:32 PM EST to 8:40 PM EST
Where
Montgomery County, 2.75 mi NW of Alamo to 1.89 mi NW of Crawfordsville
Rating
EF0
Path length
9.23 mi
Path width
100 yd
Property damage
$15,000
Reported by
NWS Storm Survey
Coordinates
40.005, -87.090

An EF-1 tornado touched down at 9:10PM EDT in central Vermillion County and traveled northeast through northwest Parke, southeast Fountain, and west-central Montgomery Counties. This tornado formed 2.72 miles southwest of Cayuga and tracked northeast for approximately 4 miles before exiting Vermillion County about 2.36 miles east, southeast of Cayuga at 9:16PM EDT. The tornado continued northeast into Parke County, around 1.51 miles west of Waterman, for another 8.6 miles before leaving the county 3.53 miles northeast of Sylvania at 9:22PM EDT. The tornado continued northeast into Fountain County, around 1.69 miles east, southeast of Kingman, for another 9.3 miles before pushing into Montgomery County at 9:32PM EDT, 2.75 miles northwest of Alamo, for another 9.23 miles and dissipating about 1.89 miles northwest of Crawfordsville at 9:40PM EDT. Multiple trees and power lines were reported down along the path, as well as siding and shingles ripped off homes. A shed was destroyed in Vermillion County and another structure sustained damage in Parke County. The tornado was rated an EF-1 along most of its path, except in Montgomery County where EF-0 damage was found. The maximum width along the path was 100 yards.

Hail, Warren

When
April 19, 8:33 PM EST to 8:35 PM EST
Where
Warren County, 1.26 mi ESE of Greenhill
Measured
0.88 in hail
Reported by
Trained Spotter
Coordinates
40.440, -87.160

Thunderstorm Wind, Montgomery

When
April 19, 8:40 PM EST
Where
Montgomery County, 0.69 mi N of Crawfordsville
Measured
70 kt (81 mph) estimated gust
Property damage
$43,000
Reported by
Trained Spotter
Coordinates
40.040, -86.900

A thunderstorm wind gust, estimated at 80 mph, downed trees in Crawfordsville. Also, the Trinity Mission facility garage and shed was destroyed, along with a flag pole and some damage to the main building.

Tornado, Tippecanoe

When
April 19, 8:40 PM EST to 8:42 PM EST
Where
Tippecanoe County, 1.68 mi NE of Taylors to 2.35 mi E of Taylor
Rating
EF1
Path length
0.71 mi
Path width
100 yd
Property damage
$80,000
Reported by
NWS Storm Survey
Coordinates
40.345, -86.895

An EF-1 tornado touched down on the south side of Lafayette in Tippecanoe county. Numerous trees were downed and one was downed on a house, completely destroying the garage.

Thunderstorm Wind, Tippecanoe

When
April 19, 8:48 PM EST
Where
Tippecanoe County, 0.87 mi SW of Battle Ground
Measured
54 kt (62 mph) measured gust
Reported by
Trained Spotter
Coordinates
40.510, -86.840

A thunderstorm wind gust of 62 mph was measured on State Route 225 in Prophetstown.

Tornado, Tippecanoe

When
April 19, 8:50 PM EST to 8:52 PM EST
Where
Tippecanoe County, 0.63 mi WSW of Buck Creek to 1.58 mi NNE of Heath
Rating
EF0
Path length
2.64 mi
Path width
50 yd
Property damage
$15,000
Reported by
NWS Storm Survey
Coordinates
40.477, -86.761

An EF-0 tornado touched down south of Buck Creek in Tippecanoe county. A barn sustained damage due to this tornado, with a portion of its roof missing and some of the siding ripped off.

Thunderstorm Wind, Clinton

When
April 19, 8:55 PM EST
Where
Clinton County, 2.33 mi NNW of Colfax
Measured
52 kt (60 mph) estimated gust
Reported by
Broadcast Media
Coordinates
40.230, -86.690

A thunderstorm wind gust, estimated at 60 mph, was reported from this location.

Thunderstorm Wind, Clinton

When
April 19, 8:55 PM EST
Where
Clinton County, 0.47 mi SSE of Mulberry
Measured
56 kt (64 mph) estimated gust
Property damage
$5,000
Reported by
Broadcast Media
Coordinates
40.344, -86.665

Trees were reported down in Mulberry due to damaging thunderstorm wind gusts.

Thunderstorm Wind, Clinton

When
April 19, 8:55 PM EST
Where
Clinton County, 0.47 mi SSE of Mulberry
Measured
56 kt (64 mph) estimated gust
Property damage
$5,000
Reported by
Broadcast Media
Coordinates
40.344, -86.665

Trees were reported down in Mulberry due to damaging thunderstorm wind gusts.

Thunderstorm Wind, Clinton

When
April 19, 8:55 PM EST
Where
Clinton County, 0.47 mi SSE of Mulberry
Measured
56 kt (64 mph) estimated gust
Property damage
$5,000
Reported by
Broadcast Media
Coordinates
40.344, -86.665

Trees were reported down in Mulberry due to damaging thunderstorm wind gusts.

Thunderstorm Wind, Clinton

When
April 19, 8:55 PM EST
Where
Clinton County, 0.47 mi SSE of Mulberry
Measured
56 kt (64 mph) estimated gust
Property damage
$5,000
Reported by
Broadcast Media
Coordinates
40.344, -86.665

Trees were reported down in Mulberry due to damaging thunderstorm wind gusts.

Tornado, Boone

When
April 19, 8:55 PM EST to 8:56 PM EST
Where
Boone County, 1.83 mi WNW of Thorntown to 1.37 mi WNW of Thorntown
Rating
EF1
Path length
0.64 mi
Path width
50 yd
Property damage
$10,000
Reported by
NWS Storm Survey
Coordinates
40.136, -86.634

An EF-1 tornado touched down northeast of Thorntown in Boone county. Numerous trees were snapped off due to this tornado.

Thunderstorm Wind, Clinton

When
April 19, 9:00 PM EST
Where
Clinton County, 0.63 mi SE of Mulberry
Measured
65 kt (75 mph) estimated gust
Property damage
$35,000
Reported by
Broadcast Media
Coordinates
40.343, -86.662

A grain elevator was destroyed and part of a building was blown in due to damaging thunderstorm wind gusts in Mulberry. A home was reported to have sustained damage as well.

Thunderstorm Wind, Boone

When
April 19, 9:00 PM EST
Where
Boone County, 2.02 mi W of Pike
Measured
70 kt (81 mph) estimated gust
Property damage
$300,000
Reported by
Amateur Radio
Coordinates
40.126, -86.518

Multiple cars and trucks were blown off of Interstate 65, between mile markers 147 and 152, due to damaging thunderstorm wind gusts. A barn was also destroyed near this location. A larger pole barn was destroyed on County Road 400 North near 450 North.

Thunderstorm Wind, Boone

When
April 19, 9:00 PM EST
Where
Boone County, 0.87 mi NE of Pike
Measured
65 kt (75 mph) estimated gust
Property damage
$20,000
Reported by
Amateur Radio
Coordinates
40.140, -86.470

Damaging thunderstorm wind gust caused widespread structural damage to grain elevators and outside buildings, with multiple large trees down.

Thunderstorm Wind, Boone

When
April 19, 9:08 PM EST
Where
Boone County, 1.59 mi W of Gadsden
Measured
56 kt (64 mph) estimated gust
Property damage
$500
Reported by
Trained Spotter
Coordinates
40.050, -86.380

A two and a half foot diameter tree limb was downed in this location due to damaging thunderstorm wind gusts.

Thunderstorm Wind, Boone

When
April 19, 9:12 PM EST
Where
Boone County, 0.35 mi SE of Whitestown
Measured
61 kt (70 mph) estimated gust
Reported by
Trained Spotter
Coordinates
39.996, -86.345

A thunderstorm wind gust, estimated at 70 mph, was reported in Whitestown.

Thunderstorm Wind, Boone

When
April 19, 9:12 PM EST
Where
Boone County, 0.37 mi S of Terhune
Measured
61 kt (70 mph) estimated gust
Property damage
$45,000
Reported by
Public
Coordinates
40.165, -86.280

Damaging thunderstorm wind gusts caused roof damage to multiple structures in Terhune.

Thunderstorm Wind, Howard

When
April 19, 9:20 PM EST
Where
Howard County, 2.2 mi WNW of Kokomo
Measured
61 kt (70 mph) estimated gust
Property damage
$4,000
Reported by
Trained Spotter
Coordinates
40.496, -86.166

Four trees were snapped or uprooted at Howard Regional Hospital due to damaging thunderstorm wind gusts.

Thunderstorm Wind, Tipton

When
April 19, 9:20 PM EST
Where
Tipton County, 3.14 mi NNW of Hobbs
Measured
61 kt (70 mph) estimated gust
Property damage
$5,000
Reported by
Law Enforcement
Coordinates
40.320, -85.979

A roof was damaged in this location due to damaging thunderstorm wind gusts.

Hail, Clay

When
April 19, 9:25 PM EST to 9:27 PM EST
Where
Clay County, 0.51 mi SSW of Brazil
Measured
1 in hail
Reported by
Amateur Radio
Coordinates
39.524, -87.125

Thunderstorm Wind, Howard

When
April 19, 9:25 PM EST
Where
Howard County, 1.27 mi N of Indian Hgts
Measured
52 kt (60 mph) estimated gust
Property damage
$2,000
Reported by
Amateur Radio
Coordinates
40.448, -86.132

Multiple utility lines were reported down on the south side of Kokomo due to damaging thunderstorm wind gusts.

Hail, Clay

When
April 19, 9:31 PM EST to 9:33 PM EST
Where
Clay County, 0.86 mi ESE of Asherville
Measured
1 in hail
Reported by
Trained Spotter
Coordinates
39.466, -87.055

One inch hail was reported at mile marker 27 eastbound on Interstate 70, 1 mile southeast of Asherville, Indiana.

Thunderstorm Wind, Hendricks

When
April 19, 9:37 PM EST
Where
Hendricks County, 0.26 mi N of Avon
Measured
56 kt (64 mph) estimated gust
Reported by
Trained Spotter
Coordinates
39.774, -86.401

A thunderstorm wind gust, estimated at 65 mph, was reported in Avon.

Thunderstorm Wind, Marion

When
April 19, 9:45 PM EST
Where
Marion County, 0.68 mi NNE of Lawrence
Measured
56 kt (64 mph) estimated gust
Property damage
$2,000
Reported by
Amateur Radio
Coordinates
39.839, -86.025

Tree limbs, six to eight inches in diameter, were blown down due to damaging thunderstorm wind gusts.

Tornado, Knox

When
April 19, 9:54 PM EST to 10:02 PM EST
Where
Knox County, 1 mi NW of Decker to 2.38 mi WNW of Orrville
Rating
EF1
Path length
10.91 mi
Path width
75 yd
Property damage
$206,000
Reported by
NWS Storm Survey
Coordinates
38.530, -87.533

An EF-1 tornado touched down south of the town of Beal in Knox county. A 60 by 100 foot building was blown away on South Wabash River Road due to this tornado. Also, multiple high tension towers and lines were downed south of Beal. Another structure had windows blown in.

Thunderstorm Wind, Knox

When
April 19, 10:14 PM EST
Where
Knox County, 0.54 mi E of Vincennes
Measured
52 kt (60 mph) estimated gust
Reported by
Trained Spotter
Coordinates
38.680, -87.510

A thunderstorm wind gust, estimated at 60 mph, was reported in Vincennes.

Thunderstorm Wind, Knox

When
April 19, 10:15 PM EST
Where
Knox County, 0.88 mi NE of Bruceville
Measured
56 kt (64 mph) estimated gust
Property damage
$5,000
Reported by
Emergency Manager
Coordinates
38.760, -87.410

Damaging thunderstorm wind gusts blew the roof off a structure in this location.

Thunderstorm Wind, Knox

When
April 19, 10:17 PM EST
Where
Knox County, Fritchton
Measured
61 kt (70 mph) estimated gust
Property damage
$15,000
Reported by
Emergency Manager
Coordinates
38.680, -87.420

Numerous trees and power lines were reported down across Knox County due to damaging thunderstorm wind gusts.

Thunderstorm Wind, Daviess

When
April 19, 10:26 PM EST
Where
Daviess County, 2.5 mi NW of Glendale
Measured
61 kt (70 mph) estimated gust
Property damage
$8,000
Reported by
Emergency Manager
Coordinates
38.595, -87.114

Numerous trees were downed in the Seven Curves area of Highway 257. Trees were also reported down at County Road 500 South and Highway 257.

Thunderstorm Wind, Sullivan

When
April 19, 10:29 PM EST
Where
Sullivan County, 0.69 mi S of Carlisle
Measured
56 kt (64 mph) estimated gust
Property damage
$2,000
Reported by
Amateur Radio
Coordinates
38.960, -87.400

Utility lines were reported down due to damaging thunderstorm wind gusts. Power was also out in Carlisle.

Thunderstorm Wind, Martin

When
April 19, 10:33 PM EST
Where
Martin County, 0.88 mi NW of Loogootee
Measured
52 kt (60 mph) estimated gust
Property damage
$250
Reported by
Trained Spotter
Coordinates
38.680, -86.910

Tree limbs, at least four inches in diameter, were reported down due to damaging thunderstorm wind gusts.

Thunderstorm Wind, Martin

When
April 19, 10:35 PM EST
Where
Martin County, 0.86 mi NW of Loogootee
Measured
52 kt (60 mph) estimated gust
Property damage
$10,000
Reported by
Trained Spotter
Coordinates
38.678, -86.912

A thunderstorm wind gust, estimated at 60 mph, was reported in Loogootee. Reports of minor damage to mobile homes and a snapped railroad sign were also reported.

Hail, Morgan

When
April 19, 10:45 PM EST to 10:47 PM EST
Where
Morgan County, 0.69 mi S of Little Pt
Measured
1.75 in hail
Reported by
Law Enforcement
Coordinates
39.560, -86.630

Thunderstorm Wind, Daviess

When
April 19, 10:50 PM EST
Where
Daviess County, 1.28 mi ENE of Raglesville
Measured
59 kt (68 mph) measured gust
Reported by
Broadcast Media
Coordinates
38.810, -86.950

A thunderstorm wind gust, measured at 68 mph, was reported from this location.

Thunderstorm Wind, Lawrence

When
April 19, 10:54 PM EST
Where
Lawrence County, 0.88 mi SW of Bedford
Measured
61 kt (70 mph) estimated gust
Property damage
$1,000
Reported by
Amateur Radio
Coordinates
38.860, -86.490

A tree, three feet in diameter, was blown down due to damaging thunderstorm wind gusts.

Thunderstorm Wind, Greene

When
April 19, 10:54 PM EST
Where
Greene County, 1.28 mi WNW of Cincinnati
Measured
65 kt (75 mph) estimated gust
Property damage
$10,000
Reported by
Fire Department/Rescue
Coordinates
39.030, -86.750

A garage was moved off its foundation due to damaging thunderstorm wind gusts.

Flash Flood, Clay

When
April 19, 10:55 PM EST to April 20, 3:00 AM EST
Where
Clay County, 0.43 mi S of Brazil to 0.78 mi S of Brazil
Cause
Heavy Rain
Property damage
$1,000
Reported by
Newspaper
Coordinates
39.524, -87.119

The Brazil Times reported three feet of water on South Alabama Street due to thunderstorm heavy rainfall.

Thunderstorm Wind, Lawrence

When
April 19, 10:56 PM EST
Where
Lawrence County, 0.38 mi NW of Mitchell
Measured
70 kt (81 mph) estimated gust
Property damage
$5,000
Reported by
Trained Spotter
Coordinates
38.734, -86.475

A thunderstorm wind gust, estimated at 80 mph, was reported in Mitchell. A couple of business signs were also reported to have been blown over.

Thunderstorm Wind, Lawrence

When
April 19, 11:00 PM EST
Where
Lawrence County, 1.73 mi NE of Riverview
Measured
61 kt (70 mph) estimated gust
Property damage
$10,000
Reported by
Trained Spotter
Coordinates
38.847, -86.506

A tree was downed at 29th and Illinois due to damaging thunderstorm wind gusts. Other tree limbs and trees were reported down in Bedford, along with a construction trailer flipped over.

Thunderstorm Wind, Lawrence

When
April 19, 11:01 PM EST
Where
Lawrence County, 0.88 mi SW of Bedford
Measured
61 kt (70 mph) estimated gust
Reported by
Trained Spotter
Coordinates
38.860, -86.490

A thunderstorm wind gust, estimated at 70 mph, was reported in Bedford.

Thunderstorm Wind, Monroe

When
April 19, 11:05 PM EST
Where
Monroe County, Bloomington
Measured
52 kt (60 mph) estimated gust
Reported by
Trained Spotter
Coordinates
39.170, -86.520

A thunderstorm wind gust, estimated at 60 mph, was reported in Bloomington.

Thunderstorm Wind, Brown

When
April 19, 11:15 PM EST
Where
Brown County, 2.07 mi S of Spearsville
Measured
52 kt (60 mph) estimated gust
Reported by
Amateur Radio
Coordinates
39.300, -86.200

A thunderstorm wind gust, estimated at 60 mph, was reported from this location.

Flash Flood, Monroe

When
April 19, 11:20 PM EST to April 20, 3:00 AM EST
Where
Monroe County, 0.72 mi W of Bloomington to 0.9 mi WSW of Bloomington
Cause
Heavy Rain
Property damage
$2,000
Reported by
Trained Spotter
Coordinates
39.171, -86.533

Multiple intersections were reported to be flooded with water up to about a foot deep.

Thunderstorm Wind, Bartholomew

When
April 19, 11:23 PM EST
Where
Bartholomew County, 2.14 mi SSE of Clifford
Measured
51 kt (59 mph) measured gust
Reported by
Trained Spotter
Coordinates
39.250, -85.860

A thunderstorm wind gust, measured at 59 mph, was reported from this location.

Thunderstorm Wind, Shelby

When
April 19, 11:30 PM EST
Where
Shelby County, 1.27 mi ESE of Fenns
Measured
74 kt (85 mph) estimated gust
Property damage
$2,000
Reported by
Amateur Radio
Coordinates
39.440, -85.780

A thunderstorm wind gust, estimated at 85 mph, was reported from this location. Power lines were also reported to be downed.

Thunderstorm Wind, Jennings

When
April 19, 11:30 PM EST
Where
Jennings County, 0.74 mi NNE of Commiskey
Measured
52 kt (60 mph) estimated gust
Property damage
$7,000
Reported by
Trained Spotter
Coordinates
38.860, -85.644

A thunderstorm wind gust, estimated at 60 mph, was reported from this location. Trees were also reported down in and around Commiskey, from County Road 500 South to State Route 250.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Tornado
A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Indiana in 2011Every state in 2011This day in weather historyThe tornado archive for Indiana, 2011Warnings in Indiana, April 2011

Sources

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: 304708, 304884, 332505, 332506, 304709, 304768, 332507, 304711, 304789, 304892, 304769, 304895, 304770, 304783, 304784, 304785, 304786, 304899, 304787, 304919, 304921, 304815, 304771, 304788, 304790, 304792, 304715, 304796, 304713, 304772, 304834, 304915, 304773, 304821, 304823, 304825, 304828, 304857, 304774, 304718, and more.