A line of thunderstorms pushed across northern Illinois and northern Indiana during the morning hours of August the 4th. By late morning, this line of storms had developed further south into northern portions of Central Indiana.
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 line of thunderstorms pushed across northern Illinois and northern Indiana during the morning hours of August the 4th. By late morning, this line of storms had developed further south into northern portions of Central Indiana. A singular report of hail and a few reports of damaging wind gusts, including one causing significant damage to some hog barns in Randolph County.
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 4, 6:20 AM EST, 4 hours 14 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE INDIANAPOLIS IN 720 AM EDT WED AUG 4 2010 .UPDATE... AVIATION SECTION HAS BEEN UPDATED BELOW && .SYNOPSIS... THE MAIN FOCUS OF THE SHORT TERM FORECAST IS THE EXCESSIVE HEAT ACROSS CENTRAL INDIANA AS A HOT AND HUMID AIRMASS OVERTAKES THE AREA. TEMPERATURES ARE EXPECTED TO TOP OFF IN THE TRIPLE DIGITS THIS AFTERNOON WITH HEAT INDICES REACHING A DANGEROUS LEVEL OF 105 TO 112 DEGREES ACROSS THE SOUTHWEST PORTIONS OF THE FORECAST AREA. IN ADDITION...THERE IS A THREAT FOR SEVERE WEATHER AS A COLD FRONT PUSHES THROUGH A VERY UNSTABLE AIRMASS LATER TODAY AND TONIGHT. THERE WILL BE A BREAK FROM THE HEAT STARTING TOMORROW IN WAKE OF THE AFOREMENTIONED COLD FRONT. HIGHS WILL FALL INTO THE MID TO UPPER 80S WITH LESS HUMID CONDITIONS. FURTHER OUT...PLEASANT CONDITIONS WILL RETURN FOR THE WEEKEND AS HIGH PRESSURE BUILDS ACROSS THE GREAT LAKES REGION. && .NEAR TERM /REST OF TONIGHT/... CURRENT RADAR MOSAIC IS SHOWING SOME SCATTERED SHOWERS AND WEAK THUNDERSTORMS DRIFTING ACROSS THE NORTHERN PORTIONS OF CENTRAL INDIANA. FOR THE REMAINDER OF THE AREA...CALM CONDITIONS ARE PREVAILING. CURRENT OBSERVATIONS ARE REPORTING TEMPS IN THE UPPER 70S AND LOW 80S WITH DEWPOINTS ABOUT THE SAME. WINDS ARE CALM. IR SATELLITE IS DISPLAYING A BREAK IN THE CONVECTION ACROSS NORTHWEST INDIANA AND ILLINOIS. BUT...ANOTHER MCS IS CURRENTLY MOVING THROUGH NEBRASKA AND IOWA...AND WILL MOST LIKELY BE THE NEXT ROUND OF STORMS FOR CENTRAL INDIANA LATER TODAY. && .SHORT TERM /WEDNESDAY INTO THURSDAY/... THE MAIN FOCUS IS THE EXCESSIVE HEAT. A HEAT ADVISORY REMAINS IN EFFECT FOR ALL OF CENTRAL INDIANA. DECIDED TO UPGRADE TO HEAT WARNING ACROSS THE SOUTHWEST PORTIONS OF THE AREA. AT THIS TIME...MIN APPARENT TEMPS WILL MEET CRITERIA...AND MAX APPARENT TEMPS WILL BE CLOSE. SO...FELT THIS WARRANTED WARNING ACROSS THOSE COUNTIES...AND WARNING MAY HAVE TO BE EXTENDED FURTHER NORTH. GFS/EURO/NAM ALL SHOW FRONTAL BOUNDARY SITUATED OVER NORTHERN PORTIONS OF WARNING AREA THROUGH THIS AFTERNOON. IT WILL FINALLY PUSH THROUGH AS A COLD FRONT TONIGHT. LIFT IS NOT VERY IMPRESSIVE...BUT THE FRONT WILL BE MOVING INTO A HIGHLY UNSTABLE AIRMASS. SO...THERE IS A THREAT FOR SOME SEVERE WEATHER ONCE AGAIN TONIGHT. SPC HAS NORTHERN TWO-THIRDS OF FORECAST AREA UNDER SLIGHT RISK THROUGH TOMORROW MORNING. ONE CAVEAT IS THE -6 DEGREE TEMPS AT 500MB...WHICH COULD INHIBIT POTENTIAL FOR SEVERE WEATHER. THERE WAS A BIT OF DISCREPANCY BETWEEN THE NAM AND GFS/EURO REGARDING TEMPS AND DEWPOINTS FOR TODAY. THE NAM HAD HIGHER DEWPOINTS IN THE UPPER 70S WITH HIGHS JUST A BIT LOWER THAN THE GFS/EURO. CONSIDERING THE WEATHER PATTERN THE LAST FEW DAYS...LIKED THE HIGHER DEWPOINTS OF THE GFS/EURO. SO...LEANED TOWARD THE MID 70S IN THE GRIDS FOR TODAY AND TONIGHT. CARRIED MID TO UPPER 60S THROUGH THE END OF THE WEEK...THESE MAY HAVE TO BE LOWERED...BUT HESITANT TO GO MUCH LOWER AT THIS TIME. AS FAR AS TEMPS...LEANED TOWARD THE HIGHER NUMBERS OF THE GFS/EURO. UPPER 90S/LOW TRIPLE DIGITS DID NOT SEEM UNREASONABLE WITH 850 TEMPS IN THE 20-22C RANGE. FRIDAY...LESS HUMID AIR AND COOLER TEMPS /MID TO UPPER 80S/ WILL PREVAIL BEHIND THE AFOREMENTIONED COLD FRONT. PLEASANT CONDITIONS WILL BE THE NORM THROUGH THE WEEKEND. && .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 041200Z TAFS/.. INITIAL AREA OF THUNDERSTORMS OVER NORTHERN ILLINOIS IS TRACKING A LITTLE FARTHER NORTH THAN EXPECTED AND IT SHOULD PASS NEAR OR JUST OF KLAF NEAR OR SHORTLY AFTER 14Z. WILL START VCTS AT KLAF AND CONTINUE IT FOR THE REST OF THE DAY AS SCATTERED TO NUMEROUS THUNDERSTORMS WILL MOVE ACROSS NORTHERN PARTS OF CENTRAL INDIANA. AT KLAF AND KIND ONSET OF THUNDERSTORMS WILL BE SLOWER WITH BEST CHANCES LATE TODAY AND EARLY TONIGHT. AT KBMG MAIN BEST CHANCES OF THUNDERSTORMS WILL BE TONIGHT. MODELS SHOW CAPES OF UP TO 3500 J/KG...BUT AIRMASS IS QUITE CAPPED OVER CENTRAL AND SOUTHERN SECTIONS AT LEAST TODAY WHICH WILL DELAY ONSET OF THUNDERSTORMS. SOME MVFR FOG EARLY THIS MORNING AND AGAIN OVERNIGHT. && .IND WATCHES/WARNINGS/ADVISORIES... EXCESSIVE HEAT WARNING FROM NOON TO 800 PM FOR ZONES INZ043-044-051>053-060>062-067>070-041730- HEAT ADVISORY FROM NOON TO 800 PM FOR ZONES INZ021-028>031-035>042-045>049-054>057-063>065-071-072- SYNOPSIS...DT NEAR TERM...DT SHORT TERM...DT LONG TERM....TUCEK AVIATION...JH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE INDIANAPOLIS IN ISSUED BY NATIONAL WEATHER SERVICE NORTHERN INDIANA 536 AM EDT WED AUG 4 2010 INZ043-044-051>053-060>062-067>070-050945- VERMILLION-PARKE-VIGO-CLAY-OWEN-SULLIVAN-GREENE-MONROE-KNOX- DAVIESS-MARTIN-LAWRENCE- 536 AM EDT WED AUG 4 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. EXCESSIVE HEAT WILL RESULT IN A DANGEROUS SITUATION. HIGHS WILL TOP OFF AROUND 100 DEGREES WITH HEAT INDICES BETWEEN 105-112 DEGREES. THERE IS A CHANCE FOR SHOWERS AND THUNDERSTORMS. ANY STORMS THAT DO BECOME SEVERE WILL BE CAPABLE OF DAMAGING WINDS...HEAVY DOWNPOURS...AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. STRONG THUNDERSTORMS WILL BE POSSIBLE THURSDAY MORNING. SOME OF THE MAIN THREATS WILL BE WIND GUSTS UP TO 40 MPH...BRIEF DOWNPOURS...AND FREQUENT LIGHTNING. .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>042-045>049-054>057-063>065-071-072-050945- CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY- BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-PUTNAM-HENDRICKS- MARION-HANCOCK-HENRY-MORGAN-JOHNSON-SHELBY-RUSH-BROWN-BARTHOLOMEW- DECATUR-JACKSON-JENNINGS- 536 AM EDT WED AUG 4 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. EXCESSIVE HEAT WILL RESULT IN A DANGEROUS SITUATION. HIGHS WILL TOP OFF IN THE UPPER 90S WITH HEAT INDICES BETWEEN 100-105 DEGREES. THERE IS A CHANCE FOR SHOWERS AND THUNDERSTORMS. ANY STORMS THAT DO BECOME SEVERE WILL BE CAPABLE OF DAMAGING WINDS...HEAVY DOWNPOURS...AND FREQUENT LIGHTNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. STRONG THUNDERSTORMS WILL BE POSSIBLE THURSDAY MORNING. SOME OF THE MAIN THREATS WILL BE WIND GUSTS UP TO 40 MPH...BRIEF DOWNPOURS...AND FREQUENT LIGHTNING. .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)
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
744 AM EDT WED AUG 04 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0130 AM TSTM WND GST 8 E FLORA 40.54N 86.37W
08/04/2010 E70 MPH HOWARD IN TRAINED SPOTTER
TREES AND POWER LINES DOWNED. SOME TREES FIVE FOOT
DIAMETER.
&&
DTUCEKPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
747 AM EDT WED AUG 04 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0130 AM TSTM WND GST 3 E FLORA 40.54N 86.47W
08/04/2010 E70.00 MPH CARROLL IN TRAINED SPOTTER
TREES AND POWER LINES DOWNED. SOME TREES FIVE FOOT
DIAMETER.
&&
DTUCEKSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1116 AM EDT WED AUG 4 2010
INZ041-042-041615-
DELAWARE-RANDOLPH-
1116 AM EDT WED AUG 4 2010
...STRONG THUNDERSTORM ADVISORY FOR RANDOLPH AND NORTHEASTERN
DELAWARE COUNTIES UNTIL 1215 PM EDT...
AT 1113 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MONTPELIER TO
HARTFORD CITY TO 7 MILES SOUTHEAST OF FAIRMOUNT...AND MOVING
SOUTHEAST AT 30 MPH.
HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THESE STORMS...ALONG WITH FREQUENT DANGEROUS LIGHTNING.
THESE STORMS WILL BE NEAR...
EATON AROUND 1130 AM EDT...
CONVERSE AROUND 1135 AM EDT...
ALBANY AROUND 1140 AM EDT...
SELMA AROUND 1150 AM EDT...
PARKER CITY AROUND 1155 AM EDT...
RIDGEVILLE AND FARMLAND AROUND NOON EDT...
SALEM...WINCHESTER AND SARATOGA AROUND 1210 PM EDT...
UNION CITY AROUND 1215 PM EDT...
THESE STORMS 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.
&&
LAT...LON 4002 8481 4001 8506 4032 8558 4040 8557
4040 8522 4032 8520 4032 8481
TIME...MOT...LOC 1516Z 301DEG 26KT 4054 8528 4043 8541
4032 8554
MRD/DRTThe Indianapolis radar (KIND), 107 km away, was scanning. The volume nearest the first event began at 15:32 UTC.
4 thunderstorm wind, 1 hail. Local standard time, as filed.
A tree was reported downed, due to damaging thunderstorm wind gusts, near State Road 3 and County Road 1200 N.
Numerous limbs were reported down, due to damaging thunderstorm wind gusts, in Selma.
Numerous limbs were reported down, due to damaging thunderstorm wind gusts, in Parker City.
Nickel sized hail was observed at the intersection of 3rd Street and Oak Street.
Several hog barn and compost building roofs were partially blown off, due to damaging thunderstorm wind gusts, at County Road 400 S and 3725 W. Also, some sorghum plants were flattened near County Road 500 W and 5072 S.
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: 257277, 257279, 257319, 257283, 257315.