A band of showers and thunderstorms dropped southeast out of northern Indiana during the early morning hours of August the 3rd. A secondary, small line of storms developed behind the initial one.
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 IND wrote it up.
A band of showers and thunderstorms dropped southeast out of northern Indiana during the early morning hours of August the 3rd. A secondary, small line of storms developed behind the initial one. The two wind damage reports received from northern portions of central Indiana came from this secondary line of storms.
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 Aug 3, 3:26 AM EST, 4 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE INDIANAPOLIS IN 426 AM EDT WED AUG 3 2011 .UPDATE... AVIATION SECTIONS UPDATED && .SYNOPSIS... REMNANTS FROM A COLD FRONT WILL LINGER OVER THE SOUTHERN PORTIONS OF CENTRAL INDIANA THIS MORNING...AND THEN HIGH PRESSURE WILL SETTLE ACROSS THE FORECAST AREA ONCE AGAIN. TEMPS WILL BE A BIT COOLER RELATIVE TO WHAT THEY HAVE BEEN...BUT WILL STILL TOP OFF IN THE UPPER 80S/LOW 90S. THE NEXT CHANCE FOR PRECIP WILL BE ON FRIDAY AND SATURDAY AS ANOTHER DISTURBANCE MOVES ACROSS THE REGION. FURTHER OUT...THERE COULD BE A CHANGE IN THE OVERALL WEATHER PATTERN...AND POSSIBLY A BREAK FROM THE HEAT. && .NEAR TERM /TODAY/... SHOWERS AND THUNDERSTORMS WILL TRACK ACROSS CENTRAL INDIANA THROUGH MID MORNING AS COLD FRONT CONTINUES SOUTHEASTWARD MOVEMENT. HOWEVER...SEVERE THREAT HAS DIMINISHED...AND ISENTROPIC LIFT WILL CUT OFF QUICKLY BY MID MORNING. AS A RESULT...MOVED POPS ACROSS ENTIRE FORECAST AREA BY LATE MORNING. HIGH PRESSURE WILL BUILD BACK INTO THE AREA AND SKIES WILL BE PARTLY CLOUDY BY EARLY AFTERNOON. WINDS WILL SHIFT TO THE NORTHWEST AT 5 TO 10 MPH...AND TEMPS WILL BE A TAD COOLER THAN YESTERDAY AS A RESULT. HIGHS WILL TOP OFF IN THE UPPER 80S/LOW 90S. TRENDED A FEW DEGREES ABOVE GUIDANCE JUST BECAUSE OF AMPLE SUNSHINE. MODELS MAY NOT BE ACCOUNTING FOR CLEARING SOON ENOUGH. && .SHORT TERM /TONIGHT THROUGH SATURDAY/... HIGH PRESSURE WILL DOMINATE THE FORECAST THROUGH THURSDAY RESULTING IN DRY CONDITIONS. HOWEVER...FOCUS THEN TURNS TO THE NEXT DISTURBANCE PROGGED FOR THE END OF THE WEEK. A SHORTWAVE IN THE UPPER LEVELS IS PROGGED TO MOVE INTO CENTRAL INDIANA EARLY FRIDAY MORNING. MODELS ARE IN DECENT AGREEMENT IN REGARD TO TIMING...BUT THE EURO AND NAM ARE MERELY HINTING AT THE DISTURBANCE...WHEREAS THE GFS IS SHOWING A MORE DEFINED WAVE. AT THIS POINT...CONFIDENCE NOT VERY HIGH IN WHICH WAY TO GO...SO WILL ONLY GO WITH CHANCE POPS FOR NOW FROM FRIDAY AFTERNOON THROUGH SATURDAY AFTERNOON. BEYOND THAT...A LOW PRESSURE SYSTEM WILL TRACK ACROSS THE UPPER MIDWEST ON SATURDAY BRINGING A TRAILING COLD FRONT WITH IT LATE IN THE WEEKEND. TEMPS...MODELS ARE SHOWING HIGHS IN THE MID TO UPPER 80S THROUGH THE SHORT TERM...BUT TRENDED ABOVE THIS DUE TO PLENTIFUL SUNSHINE. IN ADDITION...WARMER AIR WILL START ADVECTING INTO CENTRAL INDIANA BY FRIDAY AND SATURDAY AHEAD OF AFORMENTIONED LOW PRESSURE SYSTEM ACROSS UPPER MIDWEST. && .LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/... FOCUS IS ON CHANCES FOR RAIN...MAINLY FOR THIS WEEKEND. A LINGERING FRONTAL BOUNDARY WILL BE THE FOCUS FOR CHANCES FOR SHOWERS AND THUNDERSTORMS AS SEVERAL WAVES RIDE ALONG IT. OVERALL THE MODELS ARE SIMILAR...BUT AS USUAL DIFFER ON DETAILS OF THE SMALLER WAVES. USED HPC GUIDANCE FOR THIS PERIOD WHICH YIELDS CHANCES FOR RAIN SAT/SUN AND DRIER WEATHER FOR EARLY NEXT WEEK. NEXT BIG QUESTION IS WILL THE NINETY WEATHER STICK AROUND? NUDGED UP GUIDANCE A DEGREE OR TWO BASED ON PAST VERIFICATIOBN WHICH PUTS THE INDY AREA JUST BELOW 90...BUT WOULD NOT BE SURPRISED IF EVEN WARMER TRENDS PREVAIL. TOO EARLY TO TELL ATTM. && .AVIATION /DISCUSSION FOR THE 030900Z IND TAF UPDATE/... VFR CONDITIONS EXPECTED TO CONTINUE THIS MORNING. RADAR TRENDS SHOW THIN LINE OF DIMINISHING SHOWERS PUSHING THROUGH THE IND METRO...THUS WILL INCLUDE SOME VCSH FOR THE NEXT 1-2 HOURS. THE REST OF THE TAF LOOK ON TRACK WITH CLOUDS SLOWLY DISSIPATING THIS MORNING AS CONVECTIVE CLUSTER OVER THE AREA DECAYS. PREVIOUS DISCUSSION BELOW /DISCUSSION FOR THE 030600Z TAFS/... LARGE CONVECTIVE CLUSTER HAS DEVELOPED OVER NORTHERN ILLINOIS AHEAD OF COLD FRONT. THIS EVENING/S UPPER AIR INDICATE THERE IS STILL A RATHER STRONG CAP IN PLACE...SO NOT SURE HOW FAR SOUTHEAST THIS CLUSTER WILL GET BEFORE DISSIPATING...BUT GIVEN THE CURRENT STRENGTH OF THE CLUSTER...IT MAY BE AWHILE BEFORE IT FALLS APART. MODELS INDICATE A DECENT LOW LEVEL JET FOR THIS TIME OF YEAR ACROSS THE AREA OVERNIGHT...SO CONVECTIVE POTENTIAL MAY BE HIGHER THAN WOULD NORMALLY BE EXPECTED. APPEARS THE BEST CHANCES FOR CONVECTION DIRECTLY IMPACTING A TERMINAL OVERNIGHT WILL BE AT KLAF...WITH LESSER CHANCES FARTHER SOUTH. MODEL DATA SUGGEST CONVECTIVE POTENTIAL SHOULD TAPER OFF BY 031200Z-031300Z. COLD FRONT EXPECTED TO PASS ACROSS THE TAF SITES DURING THE MID TO LATE MORNING HOURS...ALTHOUGH THE WIND SHIFT ASSOCIATED WITH THE FRONT LOOKS TO BE GRADUAL RATHER THAN SHARP. POTENTIAL EXISTS FOR SOME MVFR CEILINGS TO DEVELOP IN THE VICINITY OF THE THE FRONTAL ZONE AS WELL...BUT CONFIDENCE IS LOW. && .IND WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...TDUD NEAR TERM...TDUD SHORT TERM...TDUD LONG TERM....SMF AVIATION...JAS/JP
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE INDIANAPOLIS IN 834 PM EDT TUE AUG 2 2011 INZ051>057-060>065-067>072-031000- VIGO-CLAY-OWEN-MORGAN-JOHNSON-SHELBY-RUSH-SULLIVAN-GREENE-MONROE- BROWN-BARTHOLOMEW-DECATUR-KNOX-DAVIESS-MARTIN-LAWRENCE-JACKSON- JENNINGS- 834 PM EDT TUE AUG 2 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TONIGHT. STRONG THUNDERSTORMS WILL BE POSSIBLE LATE TONIGHT. THE STRONGEST STORMS COULD PRODUCE GUSTY WINDS...FREQUENT LIGHTNING...AND BRIEF DOWNPOURS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. STRONG THUNDERSTORMS WILL BE POSSIBLE EARLY TOMORROW MORNING. THE STRONGEST STORMS COULD PRODUCE GUSTY WINDS...FREQUENT LIGHTNING...AND BRIEF DOWNPOURS. THE HEAT INDEX IS EXPECTED TO BE FROM 95 TO 100 WEDNESDAY AFTERNOON AND AGAIN FRIDAY AFTERNOON THUNDERSTORMS ARE POSSIBLE FRIDAY THROUGH SUNDAY. IT IS TOO EARLY TO DETERMINE IF ANY OF THESE STORMS COULD BE SEVERE. HOWEVER...DEADLY LIGHTNING IS A THREAT FROM ANY THUNDERSTORM. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) INZ021-028>031-035>049-031000- CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY- BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-VERMILLION-PARKE- PUTNAM-HENDRICKS-MARION-HANCOCK-HENRY- 834 PM EDT TUE AUG 2 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TONIGHT. THERE IS A SLIGHT CHANCE FOR SEVERE THUNDERSTORMS LATE TONIGHT. THE MAIN THREATS WILL BE DAMAGING WINDS AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS EARLY WEDNESDAY MORNING. THE MAIN THREATS FROM ANY STORMS WILL BE DAMAGING WINDS AND FREQUENT LIGHTNING. THUNDERSTORMS ARE POSSIBLE FRIDAY THROUGH SUNDAY. IT IS TOO EARLY TO DETERMINE IF ANY OF THESE STORMS COULD BE SEVERE. HOWEVER...DEADLY LIGHTNING IS A THREAT FROM ANY THUNDERSTORM. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE TONIGHT AND EARLY TOMORROW MORNING. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) JH
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
109 AM EDT WED AUG 3 2011
INZ021-030600-
CARROLL-
109 AM EDT WED AUG 3 2011
...STRONG THUNDERSTORM ADVISORY FOR CARROLL COUNTY UNTIL 200 AM
EDT...
AT 108 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR MONTICELLO...MOVING SOUTHEAST AT 35 MPH.
WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HEAVY RAIN.
THIS STORM WILL BE NEAR...
YEOMAN AROUND 125 AM EDT...
DELPHI AROUND 135 AM EDT...
CAMDEN AROUND 140 AM EDT...
FLORA AROUND 145 AM EDT...
BURLINGTON AROUND 200 AM EDT...
THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS... FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.
&&
LAT...LON 4072 8652 4070 8652 4070 8645 4068 8638
4045 8637 4043 8653 4045 8668 4057 8670
4057 8678 4074 8676 4074 8661
TIME...MOT...LOC 0510Z 315DEG 29KT 4076 8680
PUMAThe Indianapolis radar (KIND), 91 km away, was scanning. The volume nearest the first event began at 08:32 UTC.
2 thunderstorm wind. Local standard time, as filed.
Trees were reported down in this location due to damaging thunderstorm wind gusts.
Trees were downed in Kempton due to damaging thunderstorm wind gusts.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2011Every state in 2011This day in weather historyWarnings in Indiana, August 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: 341539, 341540.