Scattered diurnal thunderstorms developed in an environment of moderate instability and weak shear located across the southern half of Indiana during the afternoon and early evening hours of the 27th. The bulk of the storm reports came in from the southeast half of the warning area and included small hail, heavy rain, flash flooding, and thunderstorm wind damage.
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.
Scattered diurnal thunderstorms developed in an environment of moderate instability and weak shear located across the southern half of Indiana during the afternoon and early evening hours of the 27th. The bulk of the storm reports came in from the southeast half of the warning area and included small hail, heavy rain, flash flooding, and thunderstorm wind damage.
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 May 27, 12:25 PM EST, 40 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE INDIANAPOLIS IN 125 PM EDT THU MAY 27 2010 .UPDATE... UPDATED SYNOPSIS...NEAR TERM...SHORT TERM AND LONG TERM. && .SYNOPSIS...EARLY THIS AFTERNOON A WEAK TROUGH OF LOW PRESSURE EXTENDED FROM SOUTHERN OHIO...ACROSS PARTS OF SOUTHERN CENTRAL INDIANA AND ACROSS ILLINOIS TO NEAR SAINT LOUIS. STRONG AND COOLER HIGH PRESSURE WAS FOUND ACROSS THE UPPER MIDWEST...SAGGING SOUTHEAST. TOWERING CUMULUS WAS FOUND BY LOOKING OUT THE WINDOW AND ON VISIBLE SATELLITE IMAGES. RADAR SHOWED SOME TSRA DEVELOPMENT MAINLY ALONG AND SOUTH OF INTERSTATE-70 ON EACH SIDE OF CENTRAL INDIANA. DEW POINT TEMPERATURES WERE STILL IN THE MOIST UPPER 60S. && .NEAR TERM /THIS AFTERNOON AND TONIGHT/... RADAR TRENDS SHOW CONVECTIVE DEVELOPMENT AND THIS IS EXPECTED TO CONTINUE THIS AFTERNOON AND EXPAND. WILL CONTINUE TO CARRY HIGH CHANCE POPS ACROSS MUCH OF THE FORECAST AREA THROUGH 00Z AS PLENTIFUL CAPE EXISTS...2K-3+K ACCORDING TO THE SPC SURFACE BASED CAPE ANALYSIS. WATER VAPOR LOOP SHOWS A MID LEVEL DRY SLOT OVER WISCONSIN...NORTHERN ILLINOIS AND IOWA SAGGING SOUTHEAST. THIS FEATURE SHOULD BE FULLY THROUGH OUR FORECAST AREA BY 01Z-03Z BASED UPON ITS CURRENT SPEED PROPAGATION. THIS ALONG WITH THE LOSS OF DAYTIME HEATING SHOULD BRING AN END TO ANY THUNDERSTORMS BY MID EVENING ACROSS CENTRAL INDIANA. WL ATTEMPT FOR A DRY FORECAST AFTER 00Z PERHAPS EVERY EXPECT THE FAR SOUTHERN COUNTIES WHERE THE DRY SLOT MAY NOT REACH UNTIL AFTER THE PREVIOUSLY MENTIONED 01Z TO 03Z. FORECAST SOUNDINGS AND TIME HEIGHT SECTIONS SHOW MUCH DRYER AIR BUILDING ACROSS THE FORECAST AREA OVERNIGHT AS UPWARD VERTICAL MOTION IS LOST. THUS EXPECT SKIES TO BECOME MOSTLY CLEAR. GIVEN OUR EXPECTED DEW POINT TEMPERATURES...ONGOING FORECAST LOW TEMPERATURES LOOK PRETTY GOOD AND WILL MAKE ONLY MINOR ADJUSTMENTS. && .SHORT TERM /FRIDAY THROUGH SUNDAY NIGHT/... STRONG RIDGE WILL BUILD ACROSS THE GREAT LAKES AND CENTRAL INDIANA ON FRIDAY THROUGH SUNDAY. TIME HEIGHTS SHOW A DRY COLUMN WITH SUBSIDENCE. CU RULE THROUGH THE WEEKEND SHOWS ONLY SLIGHTLY NEGATIVE VALUES AND FORECAST SOUNDINGS REVEAL VERY DRY DEW POINTS IN THE COLUMN...THUS LITTLE TO ONLY SOME SCT CU WILL BE EXPECTED ON FRIDAY AND SATURDAY. GIVEN THIS...MOSTLY SUNNY DAYS AND MOSTLY CLEAR NIGHTS ARE EXPECTED ON FRIDAY THROUGH SUNDAY. H8 TEMPS START OUT NEAR 12C-13C ON FRIDAY AND RISE TOWARD 14C-15C BY SUNDAY. ALONG WITH THIS THE SURFACE FLOW GRADUALLY CHANGES OVER THE WEEKEND FROM NORTH TO NORTHEAST TO MORE SOUTHEAST. THUS WILL PROJECTS SLOWLY WARMING HIGH AND LOW TEMPERATURES AS THE WEEKEND PROGRESSES. GIVEN THE H8 TEMPS ON FRIDAY WILL LEAN COOLER THAN MAVMOS ON FRIDAY/S HIGHS. WILL TREND HIGH TEMPERATURES SLIGHTLY WARMER ON SATURDAY AS H8 TEMPS SLIGHTLY RISE AND RETURN FLOW BEGINS. WILL STICK CLOSE TO MAVMOS TEMPS ON LOWS ON FRIDAY NIGHT AND SATURDAY NIGHT AS THEY APPEAR ON THE MARK. BY SUNDAY AFTERNOON AND NIGHT SOUTHERLY FLOW IS IN FULL SWING AND MOISTURE BEGINS TO RETURN. FORECAST SOUNDINGS ONCE AGAIN REVEAL THAT SOME INSTABILITY WILL PRESENT DURING THE AFTERNOON AND EVENING HOURS. FURTHERMORE GFS INDICATES A WEAK SHORT WAVE APPROACHING ASSOCIATED WITH MONDAY/S SYSTEM. THUS THUNDERSTORMS CHANCES SUNDAY AFTERNOON AND NIGHT SEEM VALID. WILL LEAN WARMER THAN MEXMOS ON SUNDAY/S HIGHS AS SOUTHERLY FLOW OF WARM AIR IS ONGOING AND AGAIN WARMER ON LOWS AS ANY CLOUD COVER ASSOCIATED WITH THE APPROACHING SYSTEM SHOULD HELP TO KEEP TEMPERATURES FROM FALLING MUCH. && .LONG TERM /MONDAY THROUGH THURSDAY/... BEST DYNAMIC NEXT WEEK APPEAR TO PUSH THROUGH ON MONDAY AHEAD OF A WEAK UPPER TROUGH AS THE PERSISTENT RIDGE OF THE PAST WEEK BEGINS TO MOVE OFF TO THE EAST. GIVEN THIS FORCING AND THE MODEL AGREEMENT OF A WARM AND HUMID AIR MASS IN PLACE...RAIN ON MONDAY LOOKS LIKE OUR NEXT BEST CHANCE FOR WIDESPREAD RAINFALL ACROSS CENTRAL INDIANA. FOR NOW WILL CONTINUE THE CHANCE POPS. GIVEN THE INCREASED CLOUDS AND POSSIBLE RAIN ON MONDAY AND TRENDED LOWER THAN MEXMOS FOR HIGHS...BUT WARMER ON LOWS. GFS AND ECMWF AGREE ON DRYER AIR WORKING INTO CENTRAL INDIANA ON TUESDAY AND WEDNESDAY IN THE WAKE OF THE COLD FRONT. SURFACE FLOW LOOKS TO BECOME NORTHEAST...THUS TEMPERATURES FOR THE MIDDLE PART OF NEXT WEEK ARE EXPECTED TO COOL OFF SOME. ANOTHER LOW PRESSURES SYSTEM LOOKS TO APPROACH INDIANA ON THURSDAY...DRAGGING A WARM FRONT BACK NORTH ACROSS THE STATE. THIS WILL ONCE AGAIN BRING CHANCES FOR SHOWERS AND STORMS TO CENTRAL INDIANA. && .AVIATION.../DISCUSSION FOR 271800Z TAF ISSUANCE/... OUTSIDE OF ANY TSRA...EXPECT VFR CONDITIONS THROUGH THE PERIOD. EXPECT BROKEN CU TO DEVELOP IN MOIST UNSTABLE ATMOSPHERE TODAY. WITH THE INSTABILITY...SCATTERED CONVECTION WILL DEVELOP. AT THE MOMENT DO NOT BELIEVE CONVECTION WILL BE WELL ORGANIZED WITH ONLY WEAK SUPPORT ALOFT AND LACK OF A STRONG SURFACE FEATURE. THUS WILL ONLY GO WITH CB MENTION IN THE TAFS. WILL WATCH AND SEE IF BETTER DETAIL CAN BE ADDED BY ISSUANCE TIME THOUGH. NO MAJOR WINDSHIFTS EXPECTED SO WILL CONTINUE WITH NORTH OR NORTHWEST WINDS. DRIER AIR WILL WORK INTO THE AREA THIS EVENING AND OVERNIGHT. THIS COMBINED WITH WINDS REMAINING AT LEAST AROUND 5KT OVERNIGHT SHOULD KEEP FOG FROM FORMING. WILL CONTINUE TO LEAVE OUT OF TAFS. && .IND WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...PUMA NEAR TERM...PUMA SHORT TERM...PUMA LONG TERM....PUMA AVIATION...50
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE INDIANAPOLIS IN 413 AM EDT THU MAY 27 2010 INZ028-035-043-044-051-060-067-280915- WARREN-FOUNTAIN-VERMILLION-PARKE-VIGO-SULLIVAN-KNOX- 413 AM EDT THU MAY 27 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. SCATTERED THUNDERSTORMS WILL DEVELOP TODAY...ESPECIALLY DURING THE HEAT OF THE AFTERNOON...AND WILL END BY EARLY EVENING. SEVERE WEATHER IS NOT EXPECTED BUT ANY STORMS THAT DO FORM WILL BE CAPABLE OF PRODUCING DANGEROUS LIGHTNING AND HEAVY DOWNPOURS. A FLOOD WARNING IS IN EFFECT FOR PORTIONS OF THE WABASH RIVER. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THUNDERSTORMS ARE POSSIBLE MONDAY THROUGH WEDNESDAY NEXT WEEK. SEVERE STORMS ARE NOT EXPECTED...HOWEVER ANY THUNDERSTORM CAN PRODUCE DANGEROUS LIGHTNING. A FLOOD WARNING WILL REMAIN IN EFFECT AS LATE AS FRIDAY FOR PORTIONS OF THE WABASH RIVER. SEE LATEST FLOOD STATEMENTS OR FLOOD WARNINGS FOR MORE DETAIL. .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) INZ021-029>031-036>042-045>049-052>057-061>065-068>072-280915- CARROLL-TIPPECANOE-CLINTON-HOWARD-MONTGOMERY-BOONE-TIPTON- HAMILTON-MADISON-DELAWARE-RANDOLPH-PUTNAM-HENDRICKS-MARION- HANCOCK-HENRY-CLAY-OWEN-MORGAN-JOHNSON-SHELBY-RUSH-GREENE-MONROE- BROWN-BARTHOLOMEW-DECATUR-DAVIESS-MARTIN-LAWRENCE-JACKSON- JENNINGS- 413 AM EDT THU MAY 27 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL INDIANA. .DAY ONE...TODAY AND TONIGHT. SCATTERED THUNDERSTORMS WILL DEVELOP TODAY...ESPECIALLY DURING THE HEAT OF THE AFTERNOON...AND WILL END THIS EVENING. SEVERE WEATHER IS NOT EXPECTED BUT ANY STORMS THAT DO FORM WILL BE CAPABLE OF PRODUCING DANGEROUS LIGHTNING AND HEAVY DOWNPOURS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THUNDERSTORMS ARE POSSIBLE MONDAY THROUGH WEDNESDAY NEXT WEEK. SEVERE STORMS ARE NOT EXPECTED...HOWEVER ANY THUNDERSTORM CAN PRODUCE DANGEROUS 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) TUCEK
The Indianapolis radar (KIND), 84 km away, was scanning. The volume nearest the first event began at 18:03 UTC.
5 thunderstorm wind, 3 flash flood, 1 heavy rain, 1 flood. Local standard time, as filed.
Many tree branches over one foot in diameter were reported downed and extremely heavy rain quickly inundated fields. Half inch hail was reported in this location as well.
A rainfall amount of 2.75 inches was observed in an hour by a trained spotter in Edinburgh.
Approximately 10 inches of water was over the road in a cul-de-sac in Edinburgh. The location of this event is an estimation.
A least three roads in Edinburgh were closed due to high water. The fire department also measured 3.08 inches of rain in 2 hours.
A few home shingles were damaged in the town of Lynn.
A few roads were reported closed due to water over the road.
Minor flooding was reported in the town of Lynn.
Power lines were reported down at 614 Main Street in Bruceville. This is located at State Route 550 on the northern end of town.
A tree was reported down across Rod And Gun Club Road due to thunderstorm wind gusts.
A tree was reported down and blocking the roadway on Highway 231 about a half mile south of Loogootee. Another tree was reported down on County Road 100 S near 1300 E.
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, May 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: 237520, 237585, 237582, 237589, 237529, 237591, 237592, 237530, 237534, 237621.