Slow moving thunderstorms occurred across Central Indiana during the overnight hours of April 29th. Many of the storms produced radar estimated amounts of 2 to as much as 5 inches of rain.
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.
Slow moving thunderstorms occurred across Central Indiana during the overnight hours of April 29th. Many of the storms produced radar estimated amounts of 2 to as much as 5 inches of rain.
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 Apr 29, 5:30 AM EST, 1 hour earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE INDIANAPOLIS IN 630 AM EDT WED APR 29 2009 .AVIATION...DISCUSSION FOR 12Z TAF ISSUANCE. WEAK DISTURBANCE NOW MOVING ACROSS SOUTHERN IN HAS BEEN RESPONSIBLE FOR THE SCT TSRA OVERNIGHT. THE TSRA SHOULD END BY 15Z WITH SCT -SHRA POSSIBLE THROUGH 18Z BEFORE ENDING. LIFR/IFR CIGS SHOULD ALSO GRADUALLY IMPROVE THROUGH 18Z AS SOME MIXING SHOULD ACT TO RAISE CIGS TOWARD THE INVERSION LEVEL AOA 1KFT. HOWEVER...ANY IMPROVEMENT IN CIGS WILL BE SHORT LIVED AS WE EXPECT IFR CIGS TO RE-DEVELOP TONIGHT AS LOW LEVEL WINDS TURN SE AND SHALLOW LIFT PERSISTS. && .PREV DISCUSSION...FORECAST FOCUS WILL BE ON POPS IN THE NEXT 24 HOURS. AREA OF SHOWERS AND THUNDERSHOWERS CONTINUES TO SLOWLY DEVELOP ACROSS THE CWA. THIS COINCIDES WITH AN AREA OF ISENTROPIC UPGLIDE ON THE 295K SURFACE. FEEDING INTO THIS AREA IS 60 DEWPOINT AIR JUST SOUTH OF A WEAK BOUNDARY AS WELL AS A WEAK WAVE SEEN ON WV IMAGERY. TODAY...THE AFOREMENTIONED BOUNDARY WAS NOT HANDLED WELL BY THE MODELS SO WILL NOT DEPEND ON ANY ONE TOO MUCH FOR THE TODAY PD. FORECAST SOUNDINGS AND ACARS DATA SHOW A LLVL INVERSION HANGING AROUND INTO THE AFTERNOON WITH PLENTY OF MOISTURE TRAPPED BELOW. WIND IS PRETTY WEAK THROUGH THE LAYER SO THERE WONT BE MUCH HELP IN LIFTING THIS INVERSION. THEREFORE HAVE GONE WITH CLOUDY SKIES THROUGH THE DAY. HAVE KEPT IN LOW POPS WITH SCT WORDING TODAY SINCE THERE ISNT MUCH THAT WILL HELP MOVE THE BOUNDARY OUT OF THE CWA SO SCT TSRA WILL BE A POSSIBILITY THROUGH THE DAY. NEUTRAL ADVECTION IS EXPECTED UNTIL LATER TONIGHT WHEN WAA TAKES OVER SO HAVE KEPT TEMPS IN THE MID 60S FARTHER NORTH AWAY FROM THE BOUNDARY AND LOW TO MID 70S SOUTH. TONIGHT...THE NAM/GFS BRING A WMFNT INTO THE CWA LATER TONIGHT AND WILL BE THE FOCUS FOR YET ANOTHER ROUND OF SCT TSRA. COVERAGE WILL EXPAND TOWARDS THURSDAY MORNING AS AN H5 WAVE AND H85 TROF MOVE NORTHEAST INTO CENTRAL INDIANA. TEMPS TONIGHT WILL BE WARMER THAN TUES NIGHT READINGS ESPECIALLY AREAS SOUTH OF THE WMFNT. THURSDAY...SURFACE PATTERN GETS A LITTLE MORE COMPLICATED ON THURSDAY. THE GFS/ECMWF AND TO A SLIGHTLY LESSER EXTENT WITH THE NAM...SHOW A SFC LOW OVER FAR NORTHERN MN AND ANOTHER ON NEAR THE OK/TX PANHANDLE. THE GFS IS STRONGER THAN THE NAM/ECMWF WITH THE ASSOCIATED SHWV AND H85 LOW SO WILL LEAN MORE TOWARD THE WEAKER NAM/ECMWF MOSTLY DUE TO BETTER CONTINUITY AND ITS POSSIBLE THE NAM IS SUFFERING FROM FEEDBACK ISSUES. END RESULT WILL BE ANOTHER ROUND OF SHOWERS AND THUNDERSTORMS ON THURSDAY. DEPENDING ON HOW MUCH SUN WE MAY OR MAY NOT GET WILL DETERMINE HOW UNSTABLE WE BECOME AND HOW HIGH THE CHANCES OF SEVERE WX WILL BE. SPC HAS PART OF THE CWA IN A SLIGHT RISK ON THURS WITH THIS SYSTEM. TEMPS WILL WARM INTO THE 70S AS THE ENTIRE CWA WILL BE IN THE WARM SECTOR. FRIDAY...COLD FRONT IS EXPECTED TO PASS THROUGH THE CWA ON FRIDAY. CONTINUED LIKELY CHANCE OF SHOWERS AND THUNDERSTORMS WITH FROPA AND IN ITS WAKE. TIMING AND STRENGTH OF THIS FRONT IS STILL UNCERTAIN SO WILL KEEP LIKELY POPS IN ON FRIDAY NIGHT FOR ALL BUT THE NORTHERN 1/3 OF THE CWA. SAT/SUN...COLD FRONT SHOULD BE CLEAR OF THE CWA BY LATE SAT MORNING. LINGERING MOISTURE WILL KEEP SKIES PCLD/MCLD THROUGH THE DAY AND CAA WILL HOLD TEMPS IN THE MID TO UPPER 60S BOTH DAYS. BY SUNDAY EVENING ANOTHER CA TROF/WAVE WILL MAKE ITS WAY INTO THE OHIO VALLEY AND SPIN UP A SFC LOW OVER TX. THIS WILL PUSH A WMFNT INTO THE AREA SO HAVE HELD ON TO LOW CHANCE POPS FOR SUN NITE. && .IND WATCHES/WARNINGS/ADVISORIES...NONE. && AVIATION...CO PUBLIC...SALLY
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE INDIANAPOLIS IN 353 AM EDT WED APR 29 2009 INZ021-028>031-035>049-051>057-061>065-068>072-300800- 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-GREENE-MONROE-BROWN-BARTHOLOMEW-DECATUR- DAVIESS-MARTIN-LAWRENCE-JACKSON-JENNINGS- 353 AM EDT WED APR 29 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE TODAY. SOME THUNDERSTORMS WILL CONTAIN HEAVY RAIN THAT MAY CAUSE WATER TO POND ON ROADWAYS. LIGHTNING WILL BE A HAZARD WITH ANY STORM THAT FORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS ON THURSDAY AFTERNOON. STRONG WIND AND HAIL WILL BE THE MAIN THREAT AS WELL AS DANGEROUS CLOUD TO GROUND LIGHTNING. THERE IS ANOTHER CHANCE OF THUNDERSTORMS ON FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE ON THURSDAY AFTERNOON. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) INZ060-067-300800- SULLIVAN-KNOX- 353 AM EDT WED APR 29 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE TODAY. SOME THUNDERSTORMS WILL CONTAIN HEAVY RAIN THAT MAY CAUSE WATER TO POND ON ROADWAYS. LIGHTNING WILL BE A HAZARD WITH ANY STORM THAT FORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. LOWLAND FLOODING CONTINUES ALONG THE WABASH RIVER. SEE THE LATEST HYDROLOGIC STATEMENT FOR FURTHER DETAILS. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS ON THURSDAY AFTERNOON. STRONG WIND AND HAIL WILL BE THE MAIN THREAT AS WELL AS DANGEROUS CLOUD TO GROUND LIGHTNING. THERE IS ANOTHER CHANCE OF THUNDERSTORMS ON FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE ON THURSDAY AFTERNOON. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) SALLY
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Two cars were reported to be stuck in high water at county road 600 north and county road 400 west. Flood damage to vehicles estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2009Every state in 2009This day in weather historyWarnings in Indiana, April 2009
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: 167913.