Scattered thunderstorms developed across northern portions of Central Indiana during the early morning hours of August 4th. A frontal boundary was positioned from west to east across the state.
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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.
Scattered thunderstorms developed across northern portions of Central Indiana during the early morning hours of August 4th. A frontal boundary was positioned from west to east across the state. Couple that with CAPE values ranging from 2000 to 4000 J/kg and as these storms pushed eastward across the area, a couple of thunderstorm wind reports were received in our forecast area.
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, 9:14 PM EST, 2 hours 26 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE INDIANAPOLIS IN 1014 PM EDT TUE AUG 3 2010 .UPDATE... THE NEAR TERM SECTION HAS BEEN UPDATED BELOW && .SYNOPSIS... HOT AND HUMID DOME HAS EXPANDED ACROSS CENTRAL INDIANA WHILE REMNANT SHOWERS...STILL WEAK...TRACK ESE OVER EAST CENTRAL INDIANA. CONDITIONS APPEAR TO BE COMING TOGETHER OVER WESTERN IOWA FOR NEW STORMS TO FORM. MODELS STILL ON TRACK IN BRINGING COOLER AND LESS HUMID CONDITIONS FOR FRIDAY THROUGH MONDAY. FORECAST ISSUES ARE HEAT ADVISORY VS. WARNING WEDNESDAY AND ALSO LIKELIHOOD OF PCPN AND HOW FAR SOUTH IT COULD TRACK TONIGHT AND WEDNESDAY AND THUS POSSIBLE BEARING ON HEAT. && .NEAR TERM /REST OF TONIGHT/... VERY WARM AND HUMID AIRMASS IS IN PLACE ACROSS THE AREA THIS EVENING. DEWPOINTS AT OR ABOVE 80 DEGREES ARE STILL COMMONPLACE AT 02Z. GIVEN THE HIGHER DEWPOINTS...HAVE RAISED LOW TEMPERATURES AT MOST LOCATIONS. MAY HAVE NOT RAISED THEM ENOUGH...BUT THERE IS SOME CONCERN THAT CONVECTION WILL DEVELOP...AND THIS WOULD ALLOW TEMPERATURES TO COOL A BIT MORE. ISOLATED CONVECTION IS STILL OCCURRING ACROSS THE NORTHERN FORECAST AREA THIS EVENING. THIS IS IN RESPONSE TO LIFT ACROSS A BOUNDARY ACROSS THE NORTHERN AREA. WEAK ISENTROPIC UPGLIDE WILL CONTINUE DURING THE NIGHT...AND SOME WEAK ENERGY ALOFT WILL CONTINUE TO RIDE AROUND THE UPPER RIDGE. THUS HAVE KEPT CHANCES FOR TSRA GOING ACROSS MUCH OF THE AREA...BUT KEPT POPS AT OR BELOW 40 MOST LOCATIONS. DID ADD PATCHY FOG WITH THE VERY MOIST AIRMASS IN PLACE. AREAS THAT DO GET TO COOL DOWN /OUTLYING AREAS MOSTLY/ SHOULD SEE SOME PATCHY FOG. && .SHORT TERM /WEDNESDAY INTO THURSDAY/... MODELS AGREE PRETTY WELL IN SAGGING SURFACE BOUNDARY SOUTH INTO CENTRAL INDIANA WEDNESDAY...FIRST ALONG SOUTH EDGE OF STORM COMPLEX IN MORNING FOLLOWED BY RE-GROUPING OF HOT AIR AFTER STORMS PASSAGE THEN MAIN FRONTAL THRUST WITH COLD FRONT DUE TO PUSH IN WEDNESDAY NIGHT AND EARLY THURSDAY. HEAT INDEX VALUES COULD REACH WARNING CRITERIA WEDNESDAY AFTERNOON ESPECIALLY IF DEWPOINTS POOL TO UPPER 70S LIKE THEY HAVE TODAY. LOW CONFIDENCE IN DEWPOINT FORECASTS FOR WEDNESDAY WHICH MAY NEED TO BE RAISED SEVERAL DEGREES. MORNING CONVECTION AND ITS POSSIBLE LINGERING INTO EARLY AFTERNOON MAY HAVE BEARING ON HEAT ADVISORY IN NORTH. REMAINING AREAS ALONG AND SOUTH OF I-70 SHOULD HAVE ENOUGH SUN TO REACH THE 90S AND HEAT INDICES TO REACH 100. 850 MB TEMPS TO +24 SUGGEST UPPER 90S ATTAINABLE IN SOUTHWEST COUNTIES AND POSSIBLE NEED TO RAISE INTO HEAT WARNING DOWN THERE. ALL MODELS CARRY RELATIVE HUMIDITY MAXIMUM SOUTHWARD ACROSS OUR FORECAST AREA WEDNESDAY NIGHT AND THURSDAY MORNING AND GENERATING VARYING AMOUNTS OF PRECIPITATION. GIVEN EXPECTED INSTABILITY AND FRONTAL LIFTING...CHANCE FORECASTS MAY NEED TO BE BUMPED UP TO LIKELY. ONE LIMITING FACTOR...ESPECIALLY FOR LOCATIONS SOUTH OF I-70 WILL BE WARM AIR CAPPING ALOFT WHERE MODELS CARRY +12 AT 700 MB AND -4 OR -5 AT 500 MB. FRONT FINALLY PUSHES SOUTH OF FORECAST AREA THURSDAY AFTERNOON SO RAIN THREAT CURRENTLY FORECAST FOR THAT TIME MAY NEED TO BE REMOVED BASED ON TONIGHTS MODEL RUNS. && .LONG TERM /FRIDAY THROUGH TUESDAY/... CANADIAN HIGH PRESSURE BUILDS INTO THE GREAT LAKES AND OHIO VALLEY REGION AND PUSHES FRONTAL PRECIPITATION ALL THE WAY TO GULF STATES SO VERY PLEASANT CONDITIONS LIKE LAST WEEKEND SHOULD OCCUR. GFS HINTS AT SOME SCATTERED SHOWERS SATURDAY BUT IF THESE OCCUR THEY SHOULD REMAIN TO OUR NORTH. MONDAY TUESDAY TIME FRAME MAY BECOME UNSETTLED BUT FOR MOMENT HAVE KEPT THESE DRY UNTIL CONSISTENT PATTERN ESTABLISHES. && .AVIATION /DISCUSSION FOR 040000Z TAFS/... FOG SHOULD BE THE MAIN ISSUE TONIGHT AS WINDS BECOME LIGHT TO CALM UNDER MOSTLY CLEAR SKIES. LATE AFTERNOON DEW POINTS WERE 78 TO 80 DEGREES AT THE TERMINALS...AND SO TEMPERATURES AFTER DARK WILL WILL NOT TAKE LONG TO REACH DEW POINTS AFTER DARK. EXPECT MVFR CONDITIONS AFTER 03Z AND IFR OR WORSE AFTER 06Z AS THE FOGGY PROGRAM SUGGESTS. MEANWHILE...EXPECT THE BULK OF THE THUNDERSTORM ACTIVITY TONIGHT AND TOMORROW TO BE NORTH OF THE TAF SITES...BUT DO NOT THINK IT WILL HURT TO THROW CB'S IN AFTER 06Z AT IND AND LAF. FINALLY...CU DEVELOPMENT PROGS SUGGEST BKN DIURNAL CU TOMORROW AFTERNOON AT LAF AND IND AND SCT DIURNAL CU AT BMG AND HUF. && .IND WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY FROM 2 PM TO 8 PM EDT WEDNESDAY FOR INZ021-028>031- 035>049-051>057-060>065-067>072. && SYNOPSIS...TUCEK NEAR TERM...50 SHORT TERM...TUCEK LONG TERM....TUCEK AVIATION...MK
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE INDIANAPOLIS IN 1024 PM EDT TUE AUG 3 2010 INZ043>048-051>057-060>065-067>072-050230- VERMILLION-PARKE-PUTNAM-HENDRICKS-MARION-HANCOCK-VIGO-CLAY-OWEN- MORGAN-JOHNSON-SHELBY-RUSH-SULLIVAN-GREENE-MONROE-BROWN- BARTHOLOMEW-DECATUR-KNOX-DAVIESS-MARTIN-LAWRENCE-JACKSON-JENNINGS- 1024 PM EDT TUE AUG 3 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TONIGHT. ISOLATED STRONG THUNDERSTORMS ARE POSSIBLE TONIGHT. THE MAIN THREATS WILL BE HEAVY DOWNPOURS AND FREQUENT LIGHTNING. WIND GUSTS TO 40 MPH WILL BE POSSIBLE. IN ADDITION...HEAT INDEX VALUES IN THE 90S TO NEAR 100 MAY LAST INTO THE OVERNIGHT HOURS...ESPECIALLY IN URBAN AREAS. PATCHY FOG IS ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. STRONG THUNDERSTORMS WILL BE POSSIBLE WEDNESDAY AND THURSDAY. THE MAIN THREAT WILL BE HEAVY DOWNPOURS AND FREQUENT LIGHTNING. WIND GUSTS TO 40 MPH WILL BE POSSIBLE. IN ADDITION...HEAT INDEX VALUES WILL BE AROUND 105 ON WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) INZ021-028>031-035>042-049-050230- CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY- BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-HENRY- 1024 PM EDT TUE AUG 3 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TONIGHT. ISOLATED STRONG THUNDERSTORMS ARE POSSIBLE TONIGHT. THE MAIN THREAT WILL BE GUSTY WINDS. FREQUENT LIGHTNING AND HEAVY DOWNPOURS ARE ALSO POSSIBLE. IN ADDITION...HEAT INDEX VALUES IN THE 90S MAY PERSIST INTO THE OVERNIGHT HOURS...ESPECIALLY IN URBAN AREAS. PATCHY FOG IS ALSO POSSIBLE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. STRONG THUNDERSTORMS WILL BE POSSIBLE WEDNESDAY AND THURSDAY. THE MAIN THREATS FROM STORMS WILL BE HEAVY DOWNPOURS AND FREQUENT LIGHTNING. WIND GUSTS TO 40 MPH WILL BE POSSIBLE. IN ADDITION...HEAT INDEX VALUES AROUND 100 ARE EXPECTED WEDNESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE)
The Indianapolis radar (KIND), 89 km away, was scanning. The volume nearest the first event began at 04:39 UTC.
2 thunderstorm wind. Local standard time, as filed.
Two trees, one blocking the road, were reported down due to damaging thunderstorm wind gusts. Roofing was also blown off a barn.
Trees and power lines were reported down due to damaging thunderstorm wind gusts. Some of these trees were approximately five feet in diameter.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2010Every state in 2010This day in weather historyWarnings in Indiana, August 2010
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: 257383, 257394.