A thunderstorm developed over Knox County in southwest Indiana moving east, southeast before another storm developed over the same area and continued to linger there for a couple of hours during the morning hours of July 30th. Just over 5 inches of rain fell in a location south of Vincennes.
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 thunderstorm developed over Knox County in southwest Indiana moving east, southeast before another storm developed over the same area and continued to linger there for a couple of hours during the morning hours of July 30th. Just over 5 inches of rain fell in a location south of Vincennes.
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 Jul 30, 9:32 AM EST, 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE INDIANAPOLIS IN 1032 AM EDT SAT JUL 30 2011 .UPDATE... NEAR TERM HAS BEEN UPDATED BELOW. && .SYNOPSIS... FEW REMAINING SHOWERS CONTINUE TO SLOWLY DISSIPATE WORKING ON REMAINING ENERGY AND NO SHEAR. WEAK HIGH PRESSURE RIDGE IS ACROSS THE SOUTHERN GREAT LAKES WHILE WEAK SURFACE TROF IS ACROSS SOUTHERN ILLINOIS AND INDIANA. THE HIGH PRESSURE WILL GRADUALLY BUILD IN AND PUSH RAINS OUT OF INDIANA TONIGHT. STRONG UPPER RIDGE HOLDING ON MEANS HOT TEMPERATURES TO CONTINUE MUCH OF THE WEEK WITH ONLY SLIGHT HUMIDITY RELIEF EARLY NEXT WEEK. SOMEWHERE MIDWEEK ANOTHER FRONT MOVES INTO THE REGION SUPPRESSING HEIGHTS SOME AND BRINGING A COMBINATION OF SOME RAIN EVENTS AND SLIGHTLY COOLER TEMPERATURES TO END THE WEEK. && .NEAR TERM /REST OF TODAY/... NOT MUCH CHANGE NEEDED TO CURRENT FORECAST. LOWERED HIGHS TO UPPER 80S PARTS OF SOUTH DUE TO MORE CLOUDS AND SLIGHTLY WETTER GROUND. WHERE THICKER CLOUDS REMAIN...HIGHS IN UPPER 80S MORE LIKELY AND THIS SHOULD BE SOUTH OF I-70. LOCATIONS NORTH OF I-70 SHOULD SEE JUST ENOUGH SUN COMBINED TO REACH 90 BUT THAT SHOULD BE BEST. FORECAST CAPES APPROACHING 2000 DURING AFTERNOON NEAR AND SOUTH OF I-70 SO POTENTIAL REMAINS FOR SHOWER AND THUNDERSTORMS TO REDEVELOP IN THESE AREAS. RAPID REFRESH INDICATES WIDELY SCATTERED CONVECTION SOUTHERN TWO THIRDS OF OUR REGION AS AIRMASS BECOMES MORE UNSTABLE. && .SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/... FEW SHOWERS AND ISOLATED THUNDERSTORMS WILL LINGER INTO EVENING AS REMAINING CAPE WORKED OVER BY VERY WEAK WAVE IN FLOW SHOWN BY GFS AND CANADIAN. SURFACE RIDGE WILL BEGIN TO TAKE OVER AND BY LATE NIGHT SKIES SHOULD BE CLEAR ACROSS CENTRAL INDIANA. DRIER AIR SHOULD BE FILTERING IN FROM GREAT LAKES HIGH AND SUNDAY MORNING MINS SHOULD BE NEAR WARMER MAV GUIDANCE IN UPPER 60S AND LOWER 70S. POTENTIAL FOR WIDESPREAD FOG SUNDAY MORNING THAT SHOULD DISSIPATE BY LATE MORNING. LOTS OF SUNSHINE SUNDAY WITH DEWPOINTS RELAXED SOME FROM RECENT DAYS SETTLING BACK INTO THE MID AND UPPER 60S. FULL SUN...HIGH HEIGHTS AND WARM/DRY GROUND SHOULD AGAIN BRING HIGH TEMPS TO AROUND 90 BUT LIKELY NO FURTHER. LIGHT NORTHEAST BREEZES WILL ADD LITTLE COOLING EFFECTS. SUNDAY NIGHT HIGH PRESSURE RIDGE AXIS SETTLES SOUTH ALONG I-70 PROVIDING CLEAR SKY LIGHT WIND NIGHT WHICH MAY AGAIN LEAD TO PATCHY DENSE FOG...ESPECIALLY IN LOCATIONS THAT RECEIVED DECENT RAINS TODAY. && .LONG TERM /MONDAY THROUGH FRIDAY/... LONG RANGE MODELS...ESPECIALLY THE 00Z ECMWF...ARE NOW QUICKER BRINGING A WEAK COLD FRONT SOUTHEAST ACROSS CENTRAL INDIANA MIDWEEK. THUS...WILL ADD CHANCE POPS TOO ALL OF CENTRAL INDIANA BY TUESDAY NIGHT. MODELS ARE NOW ALSO STALLING THE FRONT ACROSS CENTRAL INDIANA THROUGH FRIDAY. SO...WILL KEEP CHANCE POPS IN ALL THE WAY THROUGH. IN ADDITION...MODELS ARE SHOWING SOME PRETTY DECENT SHORT WAVES DROPPING ACROSS IN THE WEST TO NORTHWEST FLOW ALOFT ON THE PERIPHERY OF THE PLAINS UPPER HIGH. UPPER FLOW MUCH BETTER THAN RECENTLY...SO WOULD NOT BE SURPRISED TO SEE SOME STRONG TO SEVERE STORMS WITH THE BETTER UPPER SUPPORT. STILL EXPECTING MOSTLY 90S FOR AFTERNOON HIGHS ESPECIALLY SOUTHWEST COUNTIES PER HPC BUT PROBABLY FAR ENOUGH AWAY FROM THE UPPER HIGH CENTER TO AVOID ANY PROLONGED HEAT HEADLINES. && .AVIATION.../DISCUSSION FOR THE 301500Z TAF UPDATE/... ONLY UPDATED FOR CURRENT CONDITIONS. PREVIOUS DISCUSSION FOLLOWS... CLOUDS WILL SLOWLY CLEAR OUT THROUGH THE DAY AS HIGH PRESSURE BUILDS BACK INTO THE AREA. THERE IS A SLIGHT POSSIBILITY FOR SOME STORMS AT KBMG/KHUF THIS AFTERNOON WHERE YESTERDAY/S FRONTAL BOUNDARY WILL STALL OUT. HOWEVER...CHANCES ARE TOO LOW TO INSERT IN TAFS. VFR CONDITIONS WILL PREVAIL FROM LATE THIS MORNING UNTIL LATE TONIGHT WHEN FOG FORMS ONCE AGAIN. CONDITIONS WILL THEN DETERIORATE TO IFR CATEGORY. WINDS WILL BE LIGHT OUT OF THE EAST/SOUTHEAST. && .IND WATCHES/WARNINGS/ADVISORIES...NONE. && SYNOPSIS...TUCEK NEAR TERM...TUCEK/JH SHORT TERM...TUCEK LONG TERM....MK AVIATION...TDUD/CP
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE INDIANAPOLIS IN 404 AM EDT SAT JUL 30 2011 INZ043>049-051>057-060>065-067>072-310815- 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- 404 AM EDT SAT JUL 30 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. SCATTERED THUNDERSTORMS ARE POSSIBLE...MAINLY DURING THE HEAT OF THE AFTERNOON AND EVENING. SEVERE THUNDERSTORMS ARE NOT EXPECTED BUT LIGHTNING IS A CONCERN WITH ALL STORMS...AND SOME MAY CONTAIN BRIEF HEAVY RAIN AND GUSTY WIND. HEAT INDICES WILL REACH THE MID AND UPPER 90S THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. HEAT INDICES WILL RANGE BETWEEN 95 AND 105 FROM SUNDAY INTO FRIDAY WITH THE HIGHEST READINGS TUESDAY. THUNDERSTORMS WILL BE POSSIBLE TUESDAY NIGHT INTO FRIDAY. 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 AT THIS TIME. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) INZ021-028>031-035>042-310815- CARROLL-WARREN-TIPPECANOE-CLINTON-HOWARD-FOUNTAIN-MONTGOMERY- BOONE-TIPTON-HAMILTON-MADISON-DELAWARE-RANDOLPH- 404 AM EDT SAT JUL 30 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. THUNDERSTORMS ARE NOT EXPECTED. HEAT INDEX READINGS WILL REACH THE LOWER 90S THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. HEAT INDEX READINGS WILL REACH 95 TO 100 FROM SUNDAY INTO WEDNESDAY THEN 90 TO 95 ON THURSDAY AND FRIDAY. THUNDERSTORMS ARE POSSIBLE TUESDAY NIGHT THROUGH FRIDAY. 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 AT THIS TIME. && MORE INFORMATION...ALONG WITH OTHER WEATHER...HYDROLOGICAL AND CLIMATE INFORMATION CAN BE FOUND...AT HTTP://WEATHER.GOV/IND (ALL LOWERCASE) TUCEK
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
In a four-hour period from 6:47 AM to 10:50 AM EDT, 5.1 inches of rain fell in this location. Most fields flooded and ditches were swollen to their banks.
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, July 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: 337663.