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Overview
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A strong area of low pressure brought some severe thunderstorms to central Indiana late on December 10 into the early morning hours of December 11. Damage was mainly confined to trees and power lines down, but some structures had damage as well. More significant severe weather took place across areas to the south and west of Indiana. During the daylight hours of December 11, strong non-thunderstorm winds were observed across central Indiana. Winds gusted to over 50 mph at many locations during the day. A summary of winds is available. |
 Map of Preliminary Storm Reports |
Radar
NWS Indianapolis Radar Loop from 10 PM EST December 10 to 4 AM EST December 11
Storm Reports
Map of Preliminary Storm Reports as of 5 PM EST December 11
Below are a list of storm reports received by NWS Indianapolis
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
522 PM EST SAT DEC 11 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0938 PM TSTM WND DMG 2 E GREENWOOD 39.61N 86.08W
12/10/2021 JOHNSON IN BROADCAST MEDIA
LARGE RED ROOF INN SIGN BLEW OVER ONTO CAR
IN PARKING LOT. TIME ESTIMATED FROM RADAR.
0945 PM TSTM WND DMG 3 NE GNAW BONE 39.21N 86.12W
12/10/2021 BROWN IN 911 CALL CENTER
TREES AND POWER LINES DOWN ALL OVER BROWN
COUNTY. TIME ESTIMATED FROM RADAR.
1155 PM TSTM WND DMG 2 W PINE VILLAGE 40.45N 87.28W
12/10/2021 WARREN IN 911 CALL CENTER
TREES DOWN ON INDIANA ROUTE 26 WEST OF PINE
VILLAGE. TIME ESTIMATED FROM RADAR.
1155 PM TSTM WND DMG KINGMAN 39.97N 87.28W
12/10/2021 FOUNTAIN IN AMATEUR RADIO
GRAIN BINS BLOW OVER TIME ESTIMATED FROM
RADAR.
1155 PM TSTM WND DMG LODI 39.95N 87.40W
12/10/2021 FOUNTAIN IN 911 CALL CENTER
TREES DOWN IN WEST AND SOUTHWEST FOUNTAIN
COUNTY. TIME ESTIMATED FROM RADAR.
1205 AM TSTM WND DMG 1 ENE ARLINGTON 39.65N 85.56W
12/11/2021 RUSH IN EMERGENCY MNGR
REPORTS OF TREES DOWN AROUND THE COUNTY.
REPORTS BEGAN TO COME IN TO DISPATCH AFTER
MORRISTOWN LOST POWER AROUND MIDNIGHT.
1206 AM TSTM WND DMG 4 SW SPENCER 39.25N 86.82W
12/11/2021 OWEN IN AMATEUR RADIO
AT LEAST 4 TREES DOWN PROMPTED IN67 CLOSED
BETWEEN CARP AND FREEDOM. TIME ESTIMATED
FROM RADAR.
1210 AM TSTM WND DMG 1 SW ELNORA 38.87N 87.10W
12/11/2021 DAVIESS IN 911 CALL CENTER
TREE DOWNED ONTO INDIANA ROUTE 57 AT EAST
COUNTY ROAD 1450 NORTH. TIME ESTIMATED FROM
RADAR.
1220 AM TSTM WND DMG BICKNELL 38.77N 87.31W
12/11/2021 KNOX IN 911 CALL CENTER
TREE BLOWN ACROSS ROAD AND LIGHTNING STRUCK
A POLE ON FIRE. TIME ESTIMATED FROM RADAR.
1225 AM TSTM WND DMG 4 ENE NEW MARKET 39.97N 86.85W
12/11/2021 MONTGOMERY IN PUBLIC
POWER LINES DOWN. TIME ESTIMATED FROM RADAR.
1230 AM HAIL GREENFIELD 39.79N 85.77W
12/11/2021 E0.25 INCH HANCOCK IN PUBLIC
1245 AM TSTM WND DMG FLORA 40.55N 86.53W
12/11/2021 CARROLL IN 911 CALL CENTER
NUMEROUS TREES AND POWER LINES DOWN IN THE
CAMDEN AND FLORA AREAS. TIME ESTIMATED FROM
RADAR.
0101 AM TSTM WND DMG 1 E LADOGA 39.92N 86.78W
12/11/2021 MONTGOMERY IN PUBLIC
LARGE BRACHES AND TREES DOWN. TIME ESTIMATED
FROM RADAR.
0115 AM TSTM WND DMG 5 N ELWOOD 40.35N 85.84W
12/11/2021 MADISON IN EMERGENCY MNGR
SEVERAL TREES DOWN AROUND NORTHERN PARTS OF
COUNTY, POWER POLES DOWN AS WELL. TIME
ESTIMATED FROM RADAR.
0115 AM TSTM WND DMG 1 E FRANKFORT 40.28N 86.50W
12/11/2021 CLINTON IN PUBLIC
REPORT FROM MPING: 3-INCH TREE LIMBS BROKEN;
POWER POLES BROKEN.
0120 AM TSTM WND DMG ROCKVILLE 39.76N 87.23W
12/11/2021 PARKE IN 911 CALL CENTER
NUMEROUS TREES DOWN ACROSS PARKE COUNTY.
TIME ESTIMATED FROM RADAR.
0124 AM TSTM WND GST 3 ENE SHEPARDSVILLE 39.61N 87.37W
12/11/2021 E50 MPH PARKE IN AMATEUR RADIO
VERY HEAVY RAIN.
0130 AM TSTM WND DMG 1 SSE SUMMITVILLE 40.33N 85.64W
12/11/2021 MADISON IN EMERGENCY MNGR
SEVERAL TREES AND SOME POWER POLES DOWN
ACROSS MAINLY NORTHERN MADISON COUNTY. TIME
ESTIMATED FROM RADAR.
0150 AM TSTM WND DMG 2 WNW NEW WHITELAND 39.57N 86.14W
12/11/2021 JOHNSON IN EMERGENCY MNGR
ELECTRIC POLES AND SOME TREES DOWN IN THE
COUNTY. TRANSFORMER FIRE IN SOUTHERN PART OF
THE COUNTY.
0150 AM TSTM WND DMG 3 S CARBON 39.56N 87.11W
12/11/2021 CLAY IN 911 CALL CENTER
NUMEROUS TREES AND POWER LINES DOWN ACROSS
NORTHERN CLAY COUNTY. TIME ESTIMATED FROM
RADAR.
0200 AM TSTM WND DMG BAINBRIDGE 39.76N 86.81W
12/11/2021 PUTNAM IN 911 CALL CENTER
SEVERAL REPORTS OF TREES AND POWER LINES
ACROSS NORTHEASTERN PUTNAM COUNTY. TIME
ESTIMATED FROM RADAR.
0202 AM FLOOD NEW ROSS 39.97N 86.72W
12/11/2021 MONTGOMERY IN PUBLIC
FIELDS FLOODING OVER ON SOME ROADWAYS.
0205 AM TSTM WND DMG GREENCASTLE 39.64N 86.85W
12/11/2021 PUTNAM IN 911 CALL CENTER
NUMEROUS REPORTS OF DOWNED TREES AND POWER
LINES ACROSS CENTRAL PUTNAM COUNTY. TIME
ESTIMATED FROM RADAR.
0222 AM TSTM WND GST 4 SSE ZIONSVILLE 39.90N 86.24W
12/11/2021 M65 MPH MARION IN AMATEUR RADIO
AT 79TH AND GEORGETOWN.
0225 AM HAIL 3 W CARMEL 39.98N 86.16W
12/11/2021 U0.75 INCH HAMILTON IN PUBLIC
REPORT FROM MPING: DIME (0.75 IN.).
0236 AM TSTM WND GST 6 NW FORTVILLE 40.00N 85.92W
12/11/2021 M61 MPH HAMILTON IN PUBLIC
NOBLESVILLE NEAR THE MUSIC CENTER RELAYED
VIA TWITTER.
0253 AM TSTM WND GST 3 WSW WHITEHALL 39.15N 86.62W
12/11/2021 M59 MPH MONROE IN ASOS
ASOS STATION KBMG BLOOMINGTON.
0253 AM TSTM WND GST 3 NNE BALL STATE UNIVER 40.23N 85.40W
12/11/2021 M59 MPH DELAWARE IN ASOS
ASOS STATION KMIE MUNCIE.
0254 AM TSTM WND GST 1 NW INDIANA UNIVERSITY 39.17N 86.53W
12/11/2021 E50 MPH MONROE IN PUBLIC
PEA SIZE HAIL AS WELL.
0257 AM TSTM WND DMG 1 N BALL STATE UNIVERSI 40.21N 85.41W
12/11/2021 DELAWARE IN PUBLIC
REPORT FROM MPING: 1-INCH TREE LIMBS BROKEN;
SHINGLES BLOWN OFF.
0305 AM TSTM WND DMG SELMA 40.19N 85.27W
12/11/2021 DELAWARE IN 911 CALL CENTER
NUMEROUS REPORTS OF DOWNED TREES AND OR
POWER LINES ACROSS SOUTHEAST DELAWARE
COUNTY. TIME ESTIMATED FROM RADAR.
0307 AM FLOOD ALBANY 40.30N 85.23W
12/11/2021 DELAWARE IN AMATEUR RADIO
MINOR FLOODING OF AROUND 1 FOOT DEPTH IN
DOWNTOWN ALBANY NEAR FIRE STATION. RAIN
OVERWHELMING STORM DRAINS.
0334 AM TSTM WND GST 3 ESE FAIRLAND 39.58N 85.80W
12/11/2021 M59 MPH SHELBY IN ASOS
ASOS STATION KGEZ SHELBYVILLE.
0348 AM TSTM WND DMG 1 W MAYS 39.74N 85.44W
12/11/2021 RUSH IN 911 CALL CENTER
TREE BLOWN ONTO INDIANA ROUTE 9 NEAR EAST
COUNTY ROAD 900 NORTH. TIME ESTIMATED FROM
RADAR.
Environment
A strong area of surface low pressure along with strong winds aloft brought severe thunderstorms to parts of central Indiana, with widespread severe weather to the west and south of Indiana. The images below are a snapshot of some environmental parameters at 1:00 AM EST December 11.
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| Figure 1: Surface Pressure, Temp, Dewpoint | Figure 2: Mixed Layer CAPE | Figure 3: Effective Shear |
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| Figure 4: Storm Relative Helicity | Figure 5: Significant Tornado Parameter (effective layer) | Figure 6: Precipitable Water |
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| Figure 7: Animated GIF of Mixed Layer CAPE from 10 PM to 4 AM Dec 10-11 | Figure 8:Animated GIF of Significant Tornado Parameter from 10 PM to 4 AM Dec 10-11 | Figure 9: Animated GIF of Effective Shear from 10 PM to 4 AM Dec 10-11 |
The low pressure area brought in extremely warm and moist air for December, and the warmest temperatures occurred early in the overnight. Indianapolis tied the record high for December 11 of 66 degrees. The high temperature was set at 2:40 AM EST.
The Forecast
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| SPC Day 3 Categorical Outlook | SPC Day 2 Categorical Outlook | SPC Day 2 Tornado Outlook | SPC Day 2 Wind Outlook |
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| SPC Day 1 Categorical Outlook | SPC Day 1 Tornado Outlook | SPC Day 1 Wind Outlook |
Watches
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| Figure 1: Tornado Watch 557 | Figure 2: Tornado Watch 560 |
These were the first tornado watches of 2021 for most of central Indiana.
The Storm Prediction Center's archive of this event has more information.
Summaries from Nearby NWS Offices
Below are links to nearby office information on this event (where available). Links may change with time. Check out the offices' main pages if needed.
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Media use of NWS Web News Stories is encouraged! Please acknowledge the NWS as the source of any news information accessed from this site. |
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