Overview
A strong low pressure system and its associated cold front brought multiple lines of thunderstorms to central Indiana during the late afternoon and evening of October 11. Some of the storms caused tree damage and property damage in the western half of central Indiana.Radar
Radar/Base Velocity Image at 5:11 PM EDT | Radar/Base Velocity at 5:47 PM EDT | Radar/Base Velocity at 9:37 PM EDT |
Radar Loop from 5:00 PM EDT to 11:00 PM EDT
Storm Reports
Below are reports received by NWS Indianapolis
PRELIMINARY LOCAL STORM REPORT...SUMMARY NATIONAL WEATHER SERVICE INDIANAPOLIS IN 121 PM EDT TUE OCT 12 2021 ..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON... ..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE.... ..REMARKS.. 0438 PM TSTM WND GST 3 S TERRE HAUTE 39.43N 87.38W 10/11/2021 U50 MPH VIGO IN BROADCAST MEDIA 0448 PM TSTM WND DMG 3 WSW SHEPARDSVILLE 39.58N 87.46W 10/11/2021 VIGO IN PUBLIC A REPORT OF A 50 TO 60 FOOT TREE BLOWN DOWN FROM THUNDERSTORM WINDS WAS RECEIVED. LOCATION AND TIME IS APPROXIMATE. 0503 PM TSTM WND GST 5 SW VEEDERSBURG 40.07N 87.33W 10/11/2021 M54 MPH FOUNTAIN IN MESONET PERSONAL WEATHER STATION KINCOVIN8, RELAYED FROM BROADCAST MEDIA. 0504 PM TSTM WND GST 1 ESE ROCKVILLE 39.76N 87.21W 10/11/2021 M58 MPH PARKE IN MESONET CORRECTS PREVIOUS TSTM WND GST REPORT FROM 1 ESE ROCKVILLE. RECORDED FROM PERSONAL WEATHER STATION OF A SPOTTER, RELAYED BY BROADCAST MEDIA. 0507 PM TSTM WND DMG ATTICA 40.29N 87.25W 10/11/2021 FOUNTAIN IN NWS STORM SURVEY *** 1 INJ *** NWS EMPLOYEE NOTED VERY STRONG STRAIGHT LINE WINDS CAUSING SIGNIFICANT TREE DAMAGE ACROSS TOWN ALONG WITH TREES THAT FELL ONTO 3 HOUSES. ONE MINOR INJURY AT ONE OF THE RESIDENCES WHERE THE TREES FELL. A FAIR AMOUNT OF ROT WAS NOTED IN THE TREES. 0507 PM TSTM WND DMG ATTICA 40.29N 87.25W 10/11/2021 FOUNTAIN IN BROADCAST MEDIA LARGE TREES AND LIMBS DOWN IN ATTICA. SOME ARE BLOCKING STREETS. TIME IS APPROXIMATED FROM RADAR VELOCITY COUPLET. 0507 PM TSTM WND DMG 1 SW ATTICA 40.28N 87.25W 10/11/2021 FOUNTAIN IN BROADCAST MEDIA REPORT OF ROOF DAMAGE TO ATTICA HIGH SCHOOL FROM STORM WIND. WATER DAMAGE TO PRINCIPLES OFFICE. 0507 PM TSTM WND DMG ATTICA 40.29N 87.25W 10/11/2021 FOUNTAIN IN PUBLIC THERE ARE AT LEAST TWO HOMES DAMAGED WITH TREES DOWN. 0521 PM HAIL 3 W NEW MARKET 39.95N 86.98W 10/11/2021 E1.00 INCH MONTGOMERY IN NWS EMPLOYEE HAIL SLIGHTLY LARGER THAN THE SIZE OF QUARTERS WERE FALLING AT 400 WEST AND 600 SOUTH. 0525 PM TSTM WND GST 2 SW PURDUE UNIVERSITY 40.41N 86.94W 10/11/2021 M54 MPH TIPPECANOE IN ASOS 0525 PM TSTM WND DMG 3 WSW PURDUE UNIVERSITY 40.41N 86.96W 10/11/2021 TIPPECANOE IN PUBLIC REPORTS OF NUMEROUS TREE LIMBS BLOWN DOWN BY THUNDERSTORM WINDS ALONG SOUTH NEWMAN ROAD WERE RECEIVED. TIME ESTIMATED VIA ASOS MAX WIND GUST REPORT. 0526 PM TSTM WND GST 1 NW WEST LAFAYETTE 40.46N 86.93W 10/11/2021 M60 MPH TIPPECANOE IN BROADCAST MEDIA AT WLFI. 0528 PM TSTM WND DMG 9 ENE PINE VILLAGE 40.48N 87.09W 10/11/2021 TIPPECANOE IN EMERGENCY MNGR LATE REPORT OF A 24 FOOT BY 20 FOOT STRUCTURE FLATTENED ON SOUTH KERKHOFF AVENUE. TIME ESTIMATED FROM RADAR. 0534 PM TSTM WND DMG DAYTON 40.38N 86.77W 10/11/2021 TIPPECANOE IN EMERGENCY MNGR TREES DOWNED ACROSS DAYTON. 0536 PM TSTM WND GST 4 S LAFAYETTE 40.35N 86.87W 10/11/2021 M52 MPH TIPPECANOE IN TRAINED SPOTTER REPORT RECEIVED VIA SPOTTERNETWORK.ORG. 0549 PM TSTM WND DMG 2 SE BATTLE GROUND 40.49N 86.82W 10/11/2021 TIPPECANOE IN PUBLIC LATE REPORT OF APPROXIMATE 10 INCH DIAMETER LIMB BROKEN FROM TREE AT INTERSECTION OF OLD STATE ROAD 25 AND COUNTY ROAD 500 NORTH. 0608 PM TSTM WND DMG 3 WSW YEOMAN 40.65N 86.77W 10/11/2021 CARROLL IN TRAINED SPOTTER TREE DAMAGE ALONG THE WHITE AND CARROLL COUNTY LINE. THERE WAS SOME ADDITIONAL TREE DAMAGE SLIGHTLY TO THE EAST. DELAYED REPORT FROM YESTERDAY WITH TIME ESTIMATED FROM RADAR. 0924 PM TSTM WND DMG FRANKFORT 40.28N 86.51W 10/11/2021 CLINTON IN 911 CALL CENTER 1 TREE DOWNED WITH SEVERAL LARGE TREE LIMBS ALSO DOWNED WITHIN THE CITY LIMITS. DELAYED REPORT AND TIME ESTIMATED FROM RADAR. 0940 PM TSTM WND DMG 3 E CUTLER 40.49N 86.46W 10/11/2021 CARROLL IN 911 CALL CENTER 10 TREES DOWNED ACROSS THE EASTERN PORTIONS OF THE COUNTY WITH NO SPECIFIC LOCATION NOTED. DELAYED REPORT WITH TIME AND LOCATION ESTIMATED FROM RADAR.
Environment
Surface low pressure and its associated cold front, along with support from the upper levels, triggered the multiple lines of thunderstorms.
Figure 1: Surface Pressure and Wind at 5:00 PM EDT | Figure 2: 850mb at 5:00 PM EDT | Figure 3: 500mb at 5:00 PM EDT |
CAPE and Shear
Figure 4: Mixed Layer CAPE (MLCAPE) at 5:00 PM EDT | Figure 5: 0-1km Shear at 5:00 PM EDT |
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