A lingering boundary across the state produced the afternoon convection that had a couple severe wind reports associated with it. The evening convection was triggered by cold front that pushed into the area.
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 lingering boundary across the state produced the afternoon convection that had a couple severe wind reports associated with it. The evening convection was triggered by cold front that pushed into the area. Mainly severe wind reports were received. A singular hail report was received as well.
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, 12:52 PM EST, 33 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE INDIANAPOLIS IN 152 PM EDT SAT AUG 4 2012 .UPDATE... THE LONG TERM SECTION HAS BEEN UPDATED BELOW && .SYNOPSIS... ISSUED AT 339 AM EDT SAT AUG 4 2012 A COLD FRONT WILL MOVE THROUGH THE AREA TONIGHT AND SUNDAY BRINGING SHOWERS AND THUNDERSTORMS TO CENTRAL INDIANA. HIGH PRESSURE WILL THEN BUILD IN AND PROVIDE DRY CONDITIONS THROUGH MID WEEK NEXT WEEK. ANOTHER FRONT WILL BRING MORE CHANCES FOR RAIN AT THE END OF NEXT WEEK. && .NEAR TERM /REST OF TODAY/... ISSUED AT 921 AM EDT SAT AUG 4 2012 13Z UPDATE...THERE ARE MULTIPLE FORECAST CHALLENGES THIS MORNING INCLUDING CLOUD COVER...CONVECTION CHANCES AND TEMPERATURES. MAIN FORECAST CHALLENGE WILL BE POPS IN THE IMMEDIATE. TROUGH AXIS ACROSS SOUTHERN ILLINOIS WILL LIFT SLOWLY NORTHWARD THROUGH LATE THIS MORNING...PROVIDING A TRIGGER FOR WIDELY SCATTERED CONVECTION. ALREADY AN AREA OF SHOWERS AND THUNDERSTORMS HAS DEVELOPED ACROSS PORTIONS OF SRN IL. GUIDANCE IS SHOWING THIS AREA TRACKING ACROSS THE SRN PORTION OF THE CWA...AND THEN SCATTERED THUNDERSTORMS ARE POSSIBLE LATER THIS AFTERNOON ELSEWHERE. AND THIS IS ALL AHEAD OF THE COLD FRONT WHICH IS NOT SET TO CROSS THE AREA UNTIL LATE TONIGHT. AND THIS LEADS US TO TEMPERATURES WHICH WILL NOT ONLY BE IMPACTED BY ANY CONVECTION BUT A STRATUS DECK WHICH IS LINGERING ACROSS THE EASTERN COUNTIES OF THE CWA...AND DOES NOT APPEAR TO LIFTING OUT ANYTIME SOON. LOWERED TEMPS ACROSS THE EAST DUE TO THIS EXTENSIVE CLOUD COVERAGE. IT/S VERY REMINISCENT OF THE STRATUS DECK WHICH HUNG AROUND FRIDAY MORNING/EARLY AFTERNOON. THIS DECK IS EXPECTED TO EVENTUALLY MIX OUT...BUT NOT UNTIL LATER THIS AFTERNOON. LEFT TEMPERATURES ACROSS THE NW THE SAME...BUT LOWERED TEMP ACROSS THE SW TO ACCOUNT FOR THE AREA OF CONVECTION THAT IS QUICKLY APPROACHING THIS AREA. && .SHORT TERM /TONIGHT THROUGH MONDAY NIGHT/... ISSUED AT 339 AM EDT SAT AUG 4 2012 FOCUS IS ON CHANCES FOR RAIN INTO SUNDAY. MODELS ARE SIMILAR ENOUGH THAT A BLEND CAN BE USED. THE COLD FRONT WILL MOVE THROUGH TONIGHT AND SUNDAY ALONG WITH THE UPPER TROUGH. AN UPPER JET WILL ALSO PROVIDE SOME ADDITIONAL FORCING. USUALLY WITH THIS SET UP WOULD EASILY GO WITH LIKELY POPS. HOWEVER THE PERSISTENT DROUGHT HAS MADE SET-UPS LIKE THIS PRODUCE LESS RAIN THAN EXPECTED. IN ADDITION...MODEL REFLECTIVITY FORECASTS FROM NCEP AND SPC SHOW MORE OF SCATTERED CONVECTION THAN WIDESPREAD. THUS CONFIDENCE IS LOW IN POP FORECAST TONIGHT. SINCE LIKELY POPS ARE ALREADY IN THE FORECAST AND THESE MATCH BETTER WITH MOST SURROUNDING OFFICES FORECAST...WILL LEAVE IN LIKELY POPS TONIGHT. HOWEVER WILL ONLY GO WITH THE LOW END OF THE LIKELY CATEGORY. AGREE WITH THE SPC SLIGHT RISK TONIGHT SINCE ANY STORMS THAT FORM COULD BE STRONG TO SEVERE GIVEN THE INSTABILITY THAT DEVELOPS AHEAD OF THE SYSTEM. WILL KEEP POPS IN CHANCE CATEGORY FOR SUNDAY GIVEN WEAKER INSTABILITY AHEAD OF THE FRONT DUE TO TIME OF DAY. TIMING OF FRONT IS SUCH THAT ONLY THE SOUTHEAST FORECAST AREA WILL HAVE CHANCES FOR RAIN AFTER 18Z. DRY WEATHER WILL THEN BUILD IN WITH HIGH PRESSURE MOVING IN. GENERALLY STUCK WITH A MODEL BLEND FOR LOW TEMPERATURES THROUGH THE PERIOD. FOR HIGHS CONTINUED TO TREND TOWARD THE WARMER MET MOS SINCE GROUND WILL NOT GET THAT MUCH MOISTURE FROM TONIGHT/S SYSTEM. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... ISSUED AT 145 PM EDT SAT AUG 4 2012 GFS INDICATES A NORTHWEST FLOW WITH LITTLE TO NO DYNAMICS TO PUSH ACROSS THE AREA ON TUESDAY NIGHT THROUGH WEDNESDAY. WITH LITTLE LOWER LEVEL MOISTURE AVAILABLE...DRY WEATHER IS EXPECTED. ON THURSDAY AND THURSDAY NIGHT...THE GFS SHOWS A UPPER SHORT WAVE DROPPING OUT OF THE UPPER MIDWEST...WITH GOOD FORCING PUSHING ACROSS THE AREA WITH AN ASSOCIATED COLD FRONT. WILL INCLUDE CHC POPS DURING THIS PERIOD GIVEN THE DYNAMICS. BROAD CYCLONIC FLOW CONTINUES ON FRIDAY AND SATURDAY...HOWEVER ABUNDANT DRY AIR BEGINS TO INFILTRATE THE SYSTEM AS FORCING ALOFT IS MINIMAL...THUS A RETURN TO DRY WEATHER IS EXPECTED THEN. GENERALLY TRENDED HIGH TEMPERATURES WARMER THAN ALLBLEND DUE TO VERY DRY GROUND ACROSS CENTRAL INDIANA. && .AVIATION /DISCUSSION FOR THE 18Z TAFS/... ISSUED AT 1252 PM EDT SAT AUG 4 2012 VFR CONDITIONS ARE EXPECTED TO DETERIORATE TO PATCHY MVFR/IFR CONDITIONS OVERNIGHT BEFORE RETURNING TO VFR AFTER 14-16Z SUNDAY. CONVECTION IS DEVELOPING ACROSS SOUTHWEST INDIANA...HOWEVER HIGHER CLOUDS FROM EARLIER CONVECTION UPSTREAM IS EXPECTED TO PUSH INTO THE AREA FROM THE SOUTHWEST...LIMITING HEATING. STILL ISO-SCT TSRA WILL BE POSSIBLE ACROSS THE AREA THIS AFTERNOON DUE TO DAYTIME HEATING AS FORECAST SOUNDINGS SHOW STEEP LAPSE RATES. WITH FROPA TONIGHT A PERIOD OF TSRA WILL BE EXPECTED MAINLY ACROSS THE NORTHERN AREAS AS NAM INDICATE BEST FORCING TO PUSH ACROSS THAT AREA. MVFR TO IFR CIGS WILL BE POSSIBLE WITH THE PASSAGE OF THE COLD FRONT ALONG WITH SCT TSRA. STRONG SUBSIDENCE AND UNREACHABLE CONVECTIVE TEMPS LOOK TO BE IN STORE IN THE WAKE OF THE COLD FRONT ON SUNDAY MORNING. THUS A RETURN TO VFR. && .IND WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...50 NEAR TERM...SMF SHORT TERM...50 LONG TERM....PUMA AVIATION...JP
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE INDIANAPOLIS IN 634 AM EDT SAT AUG 4 2012 INZ021-028>031-035>049-051>057-060>065-067>072-051045- CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY- BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH-VERMILLION-PARKE- PUTNAM-HENDRICKS-MARION-HANCOCK-HENRY-VIGO-CLAY-OWEN-MORGAN- JOHNSON-SHELBY-RUSH-SULLIVAN-GREENE-MONROE-BROWN-BARTHOLOMEW- DECATUR-KNOX-DAVIESS-MARTIN-LAWRENCE-JACKSON-JENNINGS- 634 AM EDT SAT AUG 4 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. OUTLOOK: STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE. HOT TEMPERATURES WILL CONTINUE. HAZARDS: DAMAGING WINDS...LARGE HAIL...BRIEF HEAVY RAIN...LIGHTNING...HEAT INDICES NEAR OR ABOVE 100 DEGREES. TIMING: THUNDERSTORMS ARE POSSIBLE THROUGHOUT THE PERIOD...BUT THE BEST CHANCE FOR SEVERE STORMS WILL BE AFTER 800 PM. HIGHEST HEAT INDICES THIS AFTERNOON. DISCUSSION: A COLD FRONT WILL MOVE THROUGH THE AREA TONIGHT AND SUNDAY BRINGING THE THUNDERSTORMS. AHEAD OF THE FRONT TEMPERATURES WILL ONCE AGAIN RISE INTO THE 90S. HIGHER HUMIDITY WILL LEAD TO HEAT INDEX VALUES NEAR OR OVER 100 DEGREES THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. OUTLOOK: THUNDERSTORMS WILL END ON SUNDAY...THEN THUNDERSTORMS ARE POSSIBLE AGAIN THURSDAY AND FRIDAY. DISCUSSION: THE COLD FRONT WILL EXIT THE AREA SUNDAY TAKING THE THUNDERSTORMS WITH IT. SEVERE STORMS ARE NOT EXPECTED SUNDAY. HIGH PRESSURE WILL THEN PROVIDE DRY WEATHER UNTIL THURSDAY...WHEN A COLD FRONT COULD BRING THUNDERSTORMS FROM THURSDAY INTO FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED...MAINLY TONIGHT. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE)
The Indianapolis radar (KIND), 13 km away, was scanning. The volume nearest the first event began at 18:24 UTC.
8 thunderstorm wind, 2 flood, 1 hail. Local standard time, as filed.
A thunderstorm wind gust of 63 mph was measured by the ASOS at Eagle Creek Airport.
A healthy tree about 50 feet tall and 16 to 18 inches in diameter was downed across a road and partially on to a pickup truck due to damaging thunderstorm wind gusts.
A tree was downed on a home in Tipton due to damaging thunderstorm wind gusts.
Tree limbs were downed as well as a tree downed across a road near the intersection of County Roads 400 North and 525 East due to damaging thunderstorm wind gusts.
Two outbuildings were damaged, with one of the two being destroyed, due to damaging thunderstorm wind gusts. Moderate damage also occurred to a home.
Nickel to quarter sized hail was observed in this location.
An estimated 60 mph thunderstorm wind gust was observed in Parker City.
A maple tree was snapped off eight feet above the ground due to damaging thunderstorm wind gusts. Trees also sustained tree limb damage.
State Road 213 and County Road 400 North have flooding of unknown depth due to thunderstorm heavy rainfall.
Trees were reported down near Kennard due to damaging thunderstorm wind gusts.
Approximately 4 to 6 inches of water was over an unknown street in Parker City due to thunderstorm heavy rainfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2012Every state in 2012This day in weather historyWarnings in Indiana, August 2012
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: 410205, 410317, 410318, 410319, 410320, 410321, 410323, 410322, 411331, 410324, 411338.