A broken squall line moved east-southeast across southwest Indiana. The activity was supported by an upper level disturbance embedded within a branch of the jetstream that extended from west to east through central parts of Kansas and Missouri.
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 PAH wrote it up.
A broken squall line moved east-southeast across southwest Indiana. The activity was supported by an upper level disturbance embedded within a branch of the jetstream that extended from west to east through central parts of Kansas and Missouri. The squall line was enhanced by strong surface heating and moist southerly low level winds.
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 Paducah, KY wrote its last area forecast discussion before the first event at Sep 5, 11:09 AM CST, 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PADUCAH KY 1209 PM CDT WED SEP 5 2012 .UPDATE... ISSUED AT 1207 PM CDT WED SEP 5 2012 UPDATED AVIATION SECTION. && .SHORT TERM...(TODAY THROUGH FRIDAY NIGHT) ISSUED AT 232 AM CDT WED SEP 5 2012 HOT/HUMID AIRMASS REMAINS IN PLACE. TEMPS FORECAST TO HIT LOWER-MID 90S WITH LOWERS 70S TDS TODAY...TRANSLATING TO TRIPLE DIGIT HEAD INDICES WEST OF A MOUNT VERNON IL-PADUCAH KY LINE. ADVISORY CRITERIA 105 COULD BE HIT IN WRN PTNS SEMO SO WE WILL HAVE A HEAT ADVISORY FOR PTNS SEMO TBD AFTER COLLABORATION. SMALL POPS CONTINUE THRU FIRST 36 HOURS OF FORECAST...THEN BRIEFLY PAUSE BEFORE THE BEST CHANCE POPS COMING FRIDAY-FRIDAY NIGHT. THAT'S WHEN A ROBUST UPPER TROF WILL PUNCH A SURFACE COLD FRONT ACROSS THE AREA. SEE TEXT SWODY3 OUTLOOKS THIS AREA FOR THE FRONTS PASSAGE/ASSOCIATED STORMS. LIKELY CAT POPS MAY NEED TO BE INCREASED IF THE RUNS CONTINUE TO COME TOGETHER WITH WHAT THEY ARE SHOWING NOW. .LONG TERM...(SATURDAY THROUGH TUESDAY) ISSUED AT 232 AM CDT WED SEP 5 2012 ECMWF AND NAM ARE SLOWER THAN THE GFS WITH THE PASSAGE OF THE COLD FRONT SATURDAY. GFS HAS THE FRONT WELL EAST OF THE PAH FORECAST AREA AT 12Z SATURDAY...WHILE ECMWF AND NAM SHOW THE FRONT DISSECTING OUR REGION. CONSENSUS IS TO LEAN TOWARD THE SLOWER ECMWF/NAM SOLUTION...SO KEPT POPS IN THE HIGH CHANCE CATEGORY EAST FOR SATURDAY...TAPERING QUICKLY TO SLIGHT CHANCE POPS FOR OUR WESTERN COUNTIES. THE FRONT AND ANY ASSOCIATED PRECIP SHOULD BE EAST OF THE PAH FA BY 00Z SATURDAY...SO WE HAVE NO POPS IN THE FORECAST BEYOND SATURDAY. THE OTHER SIGNIFICANT FORECAST ISSUE IN THE EXTENDED IS COOLER TEMPERATURES. NORTH WINDS BEHIND THE FRONT SATURDAY WILL BRING COOLER AIR INTO THE REGION...WITH READINGS SATURDAY AROUND 10 DEGREES BELOW NORMAL. SURFACE HIGH PRESSURE OVER THE CENTRAL/NORTHERN PLAINS WILL KEEP OUR REGION IN NORTHERLY FLOW THROUGH MONDAY...WHICH WILL KEEP TEMPERATURES BELOW NORMAL DESPITE PLENTY OF SUNSHINE. ON TUESDAY THE HIGH WILL MOVE TO OUR EAST...AND A RETURN OF SOUTHERLY FLOW WILL BEGIN A GRADUAL WARM UP. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z THURSDAY AFTERNOON) ISSUED AT 1207 PM CDT WED SEP 5 2012 CHANCE OF CONVECTION WILL CONTINUE THIS AFTERNOON OVER SOUTHERN ILLINOIS...SOUTHWEST INDIANA AND NORTHWEST KENTUCKY. MCV CONTINUES TO TRACK EAST ACROSS MISSOURI AND MAY TRIGGER ADDITIONAL CONVECTION THROUGH THE AFTERNOON ACROSS THE REST OF THE AREA. TONIGHT...BEST MOISTURE SHOULD SHIFT EAST OF THE AREA...SO NO PRECIPITATION FORECAST AT THIS TIME. WINDS WILL BE VARIABLE WITH CONVECTION TODAY...LIGHT TONIGHT. && .PAH WATCHES/WARNINGS/ADVISORIES... IL...NONE. MO...HEAT ADVISORY UNTIL 7 PM CDT THIS EVENING FOR MOZ100-107>109. IN...NONE. KY...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PADUCAH KY 809 AM CDT WED SEP 5 2012 ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087- 100-107>112-114-061000- JEFFERSON-WAYNE IL-EDWARDS-WABASH-PERRY IL-FRANKLIN-HAMILTON- WHITE-JACKSON-WILLIAMSON-SALINE-GALLATIN-UNION IL-JOHNSON-POPE- HARDIN-ALEXANDER-PULASKI-MASSAC-GIBSON-PIKE-POSEY-VANDERBURGH- WARRICK-SPENCER-FULTON-HICKMAN-CARLISLE-BALLARD-MCCRACKEN-GRAVES- LIVINGSTON-MARSHALL-CALLOWAY-CRITTENDEN-LYON-TRIGG-CALDWELL- UNION KY-WEBSTER-HOPKINS-CHRISTIAN-HENDERSON-DAVIESS-MCLEAN- MUHLENBERG-TODD-PERRY MO-BOLLINGER-CAPE GIRARDEAU-WAYNE MO-CARTER- RIPLEY-BUTLER-STODDARD-SCOTT-MISSISSIPPI-NEW MADRID- 809 AM CDT WED SEP 5 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHERN ILLINOIS...SOUTHWEST INDIANA...WESTERN KENTUCKY...AND SOUTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND TONIGHT OVER THE ENTIRE OUTLOOK AREA. THE PRIMARY SEVERE WEATHER ASSOCIATED HAZARD IS ISOLATED DAMAGING WINDS AND LARGE HAIL. THE HEAT INDEX WILL TOP 100 THIS AFTERNOON ALONG AND WEST OF A MOUNT VERNON ILLINOIS TO PADUCAH KENTUCKY LINE. A HEAT ADVISORY HAS BEEN ISSUED FOR THE SOUTHEAST MISSOURI OZARKS THIS AFTERNOON...WHERE THE HEAT INDEX MAY REACH OR EXCEED 105. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY STORM CHANCES CONTINUE THURSDAY THROUGH FRIDAY NIGHT...AS A COLD FRONT MAKES ITS APPROACH AND EVENTUAL PASSAGE. THE FRONT WILL BRING SIGNIFICANTLY COOLER AND LESS HUMID AIR FOR THE WEEKEND. THE CHANCE OF STORMS COULD INCLUDE AN ISOLATED SEVERE STORM. THE BEST CHANCE OF RAIN AND FOR STRONG OR SEVERE STORMS WILL BE LATE FRIDAY INTO FRIDAY NIGHT...WHEN THE FRONT IS ACTUALLY MAKING ITS PASSAGE. .SPOTTER INFORMATION STATEMENT... SPOTTERS SHOULD STAY ABREAST OF THE LATEST FORECASTS AND UPDATES IN CASE THEIR ACTIVATION IS REQUESTED.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PADUCAH KY 1009 AM CDT WED SEP 5 2012 ILZ075>078-081>083-INZ081-082-085>088-051700- JEFFERSON-WAYNE IL-EDWARDS-WABASH-FRANKLIN-HAMILTON-WHITE-GIBSON- PIKE-POSEY-VANDERBURGH-WARRICK-SPENCER- INCLUDING THE CITIES OF...MOUNT VERNON...FAIRFIELD...ALBION... MOUNT CARMEL...WEST FRANKFORT...MCLEANSBORO...CARMI... FORT BRANCH...PETERSBURG...POSEYVILLE...EVANSVILLE...BOONVILLE... ROCKPORT 1009 AM CDT WED SEP 5 2012 ...STRONG THUNDERSTORMS APPROACHING SOUTHERN ILLINOIS AND SOUTHWEST INDIANA... THROUGH NOON...A BAND OF STRONG THUNDERSTORMS WILL MOVE SOUTHEAST TO THE INTERSTATE 64 CORRIDOR REGION OF SOUTHERN ILLINOIS AND SOUTHWEST INDIANA. THE STORMS WILL LIKELY PRODUCE LOCALLY HEAVY RAIN AND WIND GUSTS 30 TO 45 MPH. THE AREA MOST LIKELY TO EXPERIENCE THE STRONGER STORMS WILL BE FROM MOUNT VERNON ILLINOIS TO MOUNT CARMEL...TO PRINCETON AND PETERSBURG IN SOUTHWEST INDIANA...PROVIDED THE STORMS MAINTAIN THEIR CURRENT TRACK AND INTENSITY. MOVEMENT WAS SOUTHEAST AT 30 MPH.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PADUCAH KY 1044 AM CDT WED SEP 5 2012 ILZ075>078-081>083-INZ081-085-051700- JEFFERSON-WAYNE IL-EDWARDS-WABASH-FRANKLIN-HAMILTON-WHITE-GIBSON- POSEY- INCLUDING THE CITIES OF...MOUNT VERNON...FAIRFIELD...ALBION... MOUNT CARMEL...WEST FRANKFORT...MCLEANSBORO...CARMI... FORT BRANCH...POSEYVILLE 1044 AM CDT WED SEP 5 2012 ...STRONG OUTFLOW WINDS PRECEDING SEVERE STORMS OVER SOUTH CENTRAL ILLINOIS... STRONG OUTFLOW WINDS INTO JEFFERSON COUNTY ILLINOIS...AND APPROACHING WAYNE...EDWARDS AND WABASH COUNTIES IN SOUTHERN ILLINOIS...MAY RESULT IN WIND GUSTS 35 TO 50 MPH. THE WINDS ARE OUT AHEAD OF STRONG TO SEVERE THUNDERSTORMS MOVING EAST SOUTHEAST ACROSS SOUTH CENTRAL AND SOUTHEAST ILLINOIS. THE WINDS WILL SPREAD SOUTHEAST ACROSS THE INTERSTATE 64 CORRIDOR THROUGH NOON. STAY TUNED FOR LATER STATEMENTS AND POSSIBLE WARNINGS.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PADUCAH KY 1219 PM CDT WED SEP 5 2012 ILZ077-078-INZ081-082-051815- EDWARDS IL-GIBSON IN-PIKE IN-WABASH IL- 1219 PM CDT WED SEP 5 2012 ...SIGNIFICANT WEATHER ADVISORY FOR EDWARDS AND WABASH COUNTIES IN SOUTHEAST ILLINOIS...AND GIBSON AND PIKE COUNTIES IN SOUTHWEST INDIANA UNTIL 115 PM CDT... AT 1217 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM ST. FRANCISVILLE TO GRAYVILLE...AND MOVING EAST AT 40 MPH. WIND GUSTS 40 TO 50 MPH ARE EXPECTED WITH THESE STORMS. LOCATIONS THAT MAY BE IMPACTED INCLUDE... PRINCETON...FORT BRANCH...PETERSBURG...OAKLAND CITY...PATOKA... OWENSVILLE...WINSLOW...HAZLETON...FRANCISCO...SOMERVILLE...MACKEY AND SPURGEON. THESE STORMS MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THIS AREA. 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.
The Evansville,IN radar (KVWX), 17 km away, was scanning. The volume nearest the first event began at 17:26 UTC.
1 thunderstorm wind. Local standard time, as filed.
Three trees and three power poles were blown down. One tree fell on a home, and another fell on a car.
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, September 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: 406946.