Approximate location of fronts valid at 8:00 PM EDT
Severe thunderstorms developed and moved across central Indiana during the morning as well as the evening of April 19, 2011. The first round of storms brought hail and heavy rain to parts of the area. The evening storms brought widespread wind damage, heavy rain, and a couple of tornadoes.
Tornadoes
Three tornadoes touched down in central Indiana from this event. Below is an overview highlighting where the tornadoes were. Click to enlarge.
One tornado touched down in Vermillion County, then moved north and east into far southern Fountain county. The tornado was rated EF-2:
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| Path of Vermillion County Tornado - Click to Enlarge | Radar Image. Click to Enlarge | Storm Relative Velocity image. The radar is located to the east-southeast, with green indicating wind toward the radar and red indicating away from the radar. |
One tornado touched down in Tippecanoe County, south of Lafayette. The tornado was rated EF-2.
Path of Tippecanoe County Tornado - Click to Enlarge
Another tornado touched down in Boone County, immediately to the west of Thorntown. The tornado was rated EF-1, had a path length of one half mile and a width of 50 yards.
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| Path of Tornado near Thorntown. Click to Enlarge. | Radar Image of the storm near Thorntown Click to Enlarge |
Storm Relative Velocity image for the storm near Thorntown. The radar is located to the southeast, with green indicating wind toward the radar and red indicating away from the radar. |
EF-1 tornadoes typically have winds of 86-110 mph, while EF-2 tornadoes have winds of 111-135 mph. More information on the EF Scale is available from the Storm Prediction Center.
 Radar Image from near 10:00 PM. Click for a radar loop of once per hour images from 9:00 PM to 1:00 AM . |
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Example of radar velocity image from the line of storms.
Winds were over 80 mph about 4000 feet above the surface.
Click to enlarge.
Heavy Rain
Parts of central Indiana saw several inches of rain from the storms. Storms with heavy rain moved repeatedly across some of the same areas. This heavy rain resulted in flooding of area streams and eventually rivers. Below is a map of the 24 hour rainfall ending 7:00 AM April 20.
24 hour rainfall ending 7:00 AM April 20. Click to Enlarge.
Storm Reports
Below are storm reports received by the National Weather Service at Indianapolis.
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
620 AM EDT WED APR 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0921 AM FLASH FLOOD BROWNSTOWN 38.88N 86.05W
04/19/2011 JACKSON IN CO-OP OBSERVER
BROWNSTOWN HIGH SCHOOL RECEIVED 4.26 INCHES OF RAINFALL.
INDIANA HIGHWAY 250 BETWEEN BROWNSTOWN AND UNIONTOWN HAD
WATER OVER IT.
1115 AM HAIL TERRE HAUTE 39.47N 87.38W
04/19/2011 E0.75 INCH VIGO IN AMATEUR RADIO
1127 AM HAIL TERRE HAUTE 39.47N 87.38W
04/19/2011 E0.50 INCH VIGO IN AMATEUR RADIO
1143 AM HAIL 6 NNE BRAZIL 39.60N 87.08W
04/19/2011 E1.00 INCH CLAY IN TRAINED SPOTTER
1213 PM HAIL CRAWFORDSVILLE 40.04N 86.90W
04/19/2011 E1.75 INCH MONTGOMERY IN LAW ENFORCEMENT
1217 PM HAIL NORTH SALEM 39.86N 86.64W
04/19/2011 E1.00 INCH HENDRICKS IN TRAINED SPOTTER
1237 PM HAIL LEBANON 40.05N 86.47W
04/19/2011 E1.00 INCH BOONE IN AMATEUR RADIO
1244 PM HAIL CARMEL 39.97N 86.11W
04/19/2011 E1.00 INCH HAMILTON IN EMERGENCY MNGR
0106 PM HAIL ARCADIA 40.17N 86.02W
04/19/2011 E1.75 INCH HAMILTON IN EMERGENCY MNGR
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
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
0835 PM TSTM WND DMG CLINTON 39.66N 87.40W
04/19/2011 PARKE IN TRAINED SPOTTER
TREE LIMBS DOWN. WINDS REPORTED AT 60 MPH. MARBLE SIZE
HAIL ALSO REPORTED.
0835 PM TSTM WND GST CLINTON 39.66N 87.40W
04/19/2011 U60.00 MPH PARKE IN TRAINED SPOTTER
0845 PM HAIL 3 SW LAFAYETTE 40.38N 86.91W
04/19/2011 U0.25 INCH TIPPECANOE IN TRAINED SPOTTER
0850 PM HAIL 4 N TERRE HAUTE 39.53N 87.38W
04/19/2011 U0.50 INCH VIGO IN TRAINED SPOTTER
0906 PM HAIL WEST LEBANON 40.27N 87.38W
04/19/2011 U0.88 INCH WARREN IN EMERGENCY MNGR
PEA TO NICKEL SIZE HAIL...RELAY OF SPOTTER REPORT
0925 PM HAIL KINGMAN 39.97N 87.28W
04/19/2011 U1.00 INCH FOUNTAIN IN TRAINED SPOTTER
0930 PM TSTM WND DMG CRAWFORDSVILLE 40.04N 86.90W
04/19/2011 MONTGOMERY IN BROADCAST MEDIA
ROOF BLOWN OFF HOUSE ON RUSSELL STREET
0930 PM HAIL KINGMAN 39.97N 87.28W
04/19/2011 U0.50 INCH FOUNTAIN IN TRAINED SPOTTER
0930 PM TSTM WND DMG CRAWFORDSVILLE 40.04N 86.90W
04/19/2011 MONTGOMERY IN BROADCAST MEDIA
TRINITY MISSION FACILITY GARAGE AND SHED DESTROYED, TREE
UPROOTED, TREES DAMAGED, FLAG POLE DESTROYED, SOME DAMAGE
TO MAIN BUILDING
0933 PM HAIL 13 W WEST LAFAYETTE 40.44N 87.16W
04/19/2011 U0.88 INCH WARREN IN TRAINED SPOTTER
LOCATION IS 900 EAST AND 650 WEST
0945 PM TSTM WND GST LAFAYETTE 40.41N 86.87W
04/19/2011 M50.00 MPH TIPPECANOE IN BROADCAST MEDIA
0947 PM HAIL TERRE HAUTE 39.47N 87.38W
04/19/2011 E0.25 INCH VIGO IN TRAINED SPOTTER
SEVERAL REPORTS RECEIVED FROM AROUND THE COUNTY
0947 PM TSTM WND GST WEST LAFAYETTE 40.44N 86.91W
04/19/2011 E52.00 MPH TIPPECANOE IN TRAINED SPOTTER
LOCATION IS STATE ROAD 26 AND 200 NORTH
0948 PM TSTM WND GST BATTLE GROUND 40.51N 86.84W
04/19/2011 M62.00 MPH TIPPECANOE IN TRAINED SPOTTER
MEASURED ON STATE ROUTE 225 IN PROPHETSTOWN
0950 PM TSTM WND DMG LAFAYETTE 40.41N 86.87W
04/19/2011 TIPPECANOE IN BROADCAST MEDIA
TREES DOWNED ON SOUTH SIDE OF TOWN.
0955 PM TSTM WND DMG MULBERRY 40.35N 86.67W
04/19/2011 CLINTON IN BROADCAST MEDIA
TREES DOWNED.
0955 PM TSTM WND GST 10 WSW FRANKFORT 40.23N 86.69W
04/19/2011 E60.00 MPH CLINTON IN BROADCAST MEDIA
0957 PM HAIL 4 N TERRE HAUTE 39.53N 87.38W
04/19/2011 E0.50 INCH VIGO IN TRAINED SPOTTER
1000 PM HAIL NORTH TERRE HAUTE 39.54N 87.36W
04/19/2011 U0.50 INCH VIGO IN TRAINED SPOTTER
LOCATED ONE HALF MILE SOUTH OF FORT HARRISON ROAD
1000 PM TSTM WND DMG MULBERRY 40.35N 86.67W
04/19/2011 CLINTON IN BROADCAST MEDIA
GRAIN ELEVATOR DESTORYED. PART OF A BUILDING BLOWN IN .
HOME DAMAGED. TIME ESTIMATED FROM RADAR.
1000 PM FUNNEL CLOUD COLFAX 40.19N 86.67W
04/19/2011 CLINTON IN TRAINED SPOTTER
1000 PM HAIL WILLIAMSPORT 40.29N 87.29W
04/19/2011 U0.25 INCH WARREN IN TRAINED SPOTTER
1000 PM TSTM WND DMG THORNTOWN 40.13N 86.61W
04/19/2011 BOONE IN BROADCAST MEDIA
BARN DESTROYED NEAR INTERSTATE 65 AND SR 47. TIME
ESTIMATED FROM RADAR.
1005 PM TSTM WND DMG 3 NW SHERIDAN 40.17N 86.26W
04/19/2011 BOONE IN PUBLIC
ROOF DAMAGE TO MULTIPLE STRUCTURES. TIME IS ESTIMATED.
1006 PM TSTM WND DMG CRAWFORDSVILLE 40.04N 86.90W
04/19/2011 MONTGOMERY IN TRAINED SPOTTER
TREES DOWNED. ESTIMATED 80 MPH WIND GUST.
1012 PM TSTM WND GST WHITESTOWN 40.00N 86.35W
04/19/2011 E70.00 MPH BOONE IN TRAINED SPOTTER
1020 PM TSTM WND DMG TIPTON 40.28N 86.04W
04/19/2011 TIPTON IN LAW ENFORCEMENT
ROOF DAMAGE TO A HOUSE AT 1838E 100N.
1020 PM TSTM WND DMG KOKOMO 40.48N 86.13W
04/19/2011 HOWARD IN TRAINED SPOTTER
FOUR TREES SNAPPED OR UPROOTED AT HOWARD REGIONAL
HOSPITAL
1021 PM FUNNEL CLOUD DANVILLE 39.76N 86.52W
04/19/2011 HENDRICKS IN TRAINED SPOTTER
REFERENCE CITY IS APPROX LOCATION. REPORT CAME FROM 136
AND 550 EAST. QUARTER INCH HAIL ALSO FELL.
1025 PM TSTM WND GST KOKOMO 40.48N 86.13W
04/19/2011 M56.00 MPH HOWARD IN AIRPLANE PILOT
1025 PM TSTM WND DMG KOKOMO 40.48N 86.13W
04/19/2011 HOWARD IN AMATEUR RADIO
MULTIPLE UTILITY LINES ARE DOWN ON SOUTH SIDE OF CITY BY
MEASURED 56 MPH.
1031 PM HAIL 3 NE CENTER POINT 39.45N 87.03W
04/19/2011 U1.00 INCH CLAY IN TRAINED SPOTTER
HAIL AT MILE MARKER 27 EASTBOUND ON I-70 1 MILE SOUTHEAST
OF ASHERVILLE INDIANA
1032 PM TSTM WND GST INDIANAPOLIS INT`L AIRP 39.72N 86.29W
04/19/2011 M51.00 MPH MARION IN ASOS
1037 PM TSTM WND GST AVON 39.76N 86.38W
04/19/2011 U65.00 MPH HENDRICKS IN TRAINED SPOTTER
1040 PM HAIL CARMEL 39.97N 86.11W
04/19/2011 U0.50 INCH HAMILTON IN AMATEUR RADIO
1040 PM TSTM WND GST MOORESVILLE 39.62N 86.37W
04/19/2011 M51.00 MPH MORGAN IN TRAINED SPOTTER
1044 PM TSTM WND GST 5 N ANDERSON 40.17N 85.69W
04/19/2011 M52.00 MPH MADISON IN AMATEUR RADIO
IN LINWOOD INDIANA
1050 PM TSTM WND DMG 5 SE INDIANAPOLIS 39.73N 86.08W
04/19/2011 MARION IN TRAINED SPOTTER
POWER OUT AT SOUTHPORT AND MADISON.
1102 PM TSTM WND GST MUNCIE 40.20N 85.39W
04/19/2011 M57.00 MPH DELAWARE IN ASOS
1103 PM TSTM WND DMG 10 SSW VINCENNES 38.54N 87.58W
04/19/2011 KNOX IN EMERGENCY MNGR
60 BY 100 FOOT BUILDING BLOWN AWAY ON S WABASH RIVER
ROAD. HIGH TENSION LINES DOWNED. WINDOWS BLOWN IN OTHER
STRUCTURE.
1104 PM HAIL 7 E GREENFIELD 39.79N 85.64W
04/19/2011 U0.25 INCH HANCOCK IN AMATEUR RADIO
1108 PM TSTM WND DMG 5 E LEBANON 40.05N 86.38W
04/19/2011 BOONE IN TRAINED SPOTTER
2 1/2 FOOT DIAMETER TREE LIMB DOWN AT 4625 100 NORTH
1114 PM TSTM WND GST VINCENNES 38.68N 87.51W
04/19/2011 E60.00 MPH KNOX IN TRAINED SPOTTER
1115 PM TSTM WND DMG BRUCEVILLE 38.76N 87.41W
04/19/2011 KNOX IN EMERGENCY MNGR
ROOF BLOWN OFF STRUCTURE ON CAMP ARTHUR RD
1117 PM TSTM WND DMG 5 E VINCENNES 38.68N 87.42W
04/19/2011 KNOX IN EMERGENCY MNGR
NUMEROUS TREES AND POWER LINES DOWN ACROSS THE COUNTY
1125 PM HAIL BRAZIL 39.52N 87.12W
04/19/2011 U1.00 INCH CLAY IN AMATEUR RADIO
1126 PM TSTM WND DMG 4 S WASHINGTON 38.60N 87.17W
04/19/2011 DAVIESS IN EMERGENCY MNGR
NUMEROUS TREES DOWN IN THE SEVEN CURVES AREA OF HIGHWAY
257. TREES ALSO DOWN AT CR 500 S AND HWY 257.
1129 PM TSTM WND DMG CARLISLE 38.96N 87.40W
04/19/2011 SULLIVAN IN AMATEUR RADIO
UTILITY LINES ARE DOWN. POWER OUT IN TOWN.
1135 PM TSTM WND GST LOOGOOTEE 38.68N 86.91W
04/19/2011 E60.00 MPH MARTIN IN TRAINED SPOTTER
MINOR DAMAGE TO MOBILE HOMES, RAILROAD SIGN SNAPPED
1145 PM HAIL LITTLE POINT 39.56N 86.63W
04/19/2011 U1.75 INCH MORGAN IN LAW ENFORCEMENT
1145 PM TSTM WND DMG LAWRENCE 39.87N 85.99W
04/19/2011 MARION IN AMATEUR RADIO
SIX TO EIGHT TREE LIMBS WERE BLOWN DOWN ABOUT 6 TO 8
INCHES.
1150 PM TSTM WND GST 3 SE ODON 38.81N 86.95W
04/19/2011 M68.00 MPH DAVIESS IN BROADCAST MEDIA
1150 PM TSTM WND GST MARTINSVILLE 39.42N 86.42W
04/19/2011 E40.00 MPH MORGAN IN TRAINED SPOTTER
1151 PM TSTM WND DMG THORNTOWN 40.13N 86.61W
04/19/2011 BOONE IN AMATEUR RADIO
MULTIPLE CARS AND TRUCKS BLOWN OFF THE ROAD. APPROX
LOCATION. REPORT CAME BETWEEN MILE MARKERS 147 AND 152 ON
INTERSTATE 65.
1154 PM TSTM WND DMG BEDFORD 38.86N 86.49W
04/19/2011 LAWRENCE IN AMATEUR RADIO
3-FOOT DIAMETER TREE BLEW DOWN
1154 PM TSTM WND DMG 10 E BLOOMFIELD 39.03N 86.75W
04/19/2011 GREENE IN FIRE DEPT/RESCUE
GARAGE MOVED OFF ITS FOUNDATION. TIME IS RADAR ESTIMATED.
1156 PM TSTM WND GST MITCHELL 38.74N 86.48W
04/19/2011 E80.00 MPH LAWRENCE IN TRAINED SPOTTER
SIGNS HAVE BEEN BLOWN DOWN NEAR THE ARBYS AND MCDONALDS
1200 AM TSTM WND DMG BEDFORD 38.86N 86.49W
04/20/2011 LAWRENCE IN TRAINED SPOTTER
TREE DOWNED AT 29TH AND ILLINOIS.
1201 AM TSTM WND GST BEDFORD 38.86N 86.49W
04/20/2011 E70.00 MPH LAWRENCE IN TRAINED SPOTTER
1201 AM TSTM WND DMG BEDFORD 38.86N 86.49W
04/20/2011 LAWRENCE IN TRAINED SPOTTER
CONSTRUCTION TRAILER BY MCDONALDS FLIPPED OVER. TREE
NEARBY BLOWN DOWN.
1201 AM HAIL BLOOMINGTON 39.17N 86.52W
04/20/2011 U0.50 INCH MONROE IN AMATEUR RADIO
ACCOMPANIED BY EST 50 MPH WINDS
1201 AM HAIL BLOOMINGTON 39.17N 86.52W
04/20/2011 E0.50 INCH MONROE IN AMATEUR RADIO
1201 AM TSTM WND GST BEDFORD 38.86N 86.49W
04/20/2011 E70.00 MPH LAWRENCE IN TRAINED SPOTTER
1204 AM TSTM WND GST MARTINSVILLE 39.42N 86.42W
04/20/2011 E50.00 MPH MORGAN IN TRAINED SPOTTER
1205 AM TSTM WND GST BLOOMINGTON 39.17N 86.52W
04/20/2011 E60.00 MPH MONROE IN TRAINED SPOTTER
1205 AM TSTM WND DMG BEDFORD 38.86N 86.49W
04/20/2011 LAWRENCE IN AMATEUR RADIO
12-INCH LIVE TREE LIMB DOWN
1209 AM HEAVY RAIN 2 S CASTLETON 39.88N 86.05W
04/20/2011 M3.23 INCH MARION IN CO-OP OBSERVER
RAINFALL FOR CALENDAR DAY. ALSO ESTIMATED 40MPH WIND WITH
EVENING STORMS.
1215 AM TSTM WND DMG BEDFORD 38.86N 86.49W
04/20/2011 LAWRENCE IN AMATEUR RADIO
POWER LINES AND TREE LIMBS DOWN. LIMBS ARE 12 INCHES OR
LARGER IN DIAMETER.
1215 AM TSTM WND GST 2 S SPEARSVILLE 39.30N 86.20W
04/20/2011 E60.00 MPH BROWN IN AMATEUR RADIO
1215 AM TSTM WND DMG LOOGOOTEE 38.68N 86.91W
04/20/2011 MARTIN IN TRAINED SPOTTER
AT LEAST 4-INCH DIAMETER TREE LIMBS DOWN
1218 AM TSTM WND DMG BEDFORD 38.86N 86.49W
04/20/2011 LAWRENCE IN TRAINED SPOTTER
TRAFFIC LIGHT HAS BEEN DAMAGED AT K STREET AND 15.
VARIOUS DEBRIS ON ELM STREET. TREE LIMB DOWN AT 12 AND M
STREETS...ABOUT 4 INCHES THICK AND 8 FEET LONG.
1220 AM FLASH FLOOD BLOOMINGTON 39.17N 86.52W
04/20/2011 MONROE IN TRAINED SPOTTER
MULTIPLE INTERSECTIONS ARE FLOODED DOWNTOWN...UP TO ABOUT
A FOOT DEEP.
1223 AM TSTM WND GST 4 NE COLUMBUS 39.25N 85.86W
04/20/2011 M59.00 MPH BARTHOLOMEW IN TRAINED SPOTTER
1230 AM TSTM WND DMG 6 S SHELBYVILLE 39.44N 85.78W
04/20/2011 SHELBY IN AMATEUR RADIO
POWER LINES ARE DOWN ON COLUMBUS ROAD
1230 AM TSTM WND GST 5 SW NORTH VERNON 38.96N 85.70W
04/20/2011 E60.00 MPH JENNINGS IN TRAINED SPOTTER
TREES DOWN IN AND AROUND COMMISKEY FROM 500 S TO SR 250
1230 AM TSTM WND GST 6 S SHELBYVILLE 39.44N 85.78W
04/20/2011 E85.00 MPH SHELBY IN AMATEUR RADIO
POWER LINES DOWN
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