Multiple storms passed over the town of Heidelberg during the evening hours of September nineteenth. Three homes flooded and several roads washed out in town.
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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 JAN wrote it up.
Multiple storms passed over the town of Heidelberg during the evening hours of September nineteenth. Three homes flooded and several roads washed out in town.
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 Jackson, MS wrote its last area forecast discussion before the first event at Sep 19, 8:13 PM CST, 32 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSON MS 913 PM CDT MON SEP 19 2011 .UPDATE...THE FRONT REMAINS STALLED ACROSS THE REGION BUT CONVECTION CONTINUES TO DECREASE ACROSS THE FORECAST AREA...EDGING TO THE EAST AND DECREASING IN COVERAGE OVER THE ARKLAMISS. THUNDERSTORM ACTIVITY HAS ENDED WITH THE DIURNAL LOSS OF HEATING BUT THE CHANCE OF SHOWERS WILL CONTINUE OVERNIGHT DUE TO THE STALLED FRONT AND HEALTHY MOISTURE FIELD ACROSS THE REGION. THE FORECAST GENERALLY REMAINS ON TRACK WITH SLIGHT CHANCE POPS MOST AREAS EXCEPT CHANCE CATEGORY IN THE EAST. ONLY SMALL TWEAKS MADE TO OVERNIGHT TEMPERATURES AND CLOUD COVER. .SHORT TERM...(TONIGHT THROUGH WEDNESDAY NIGHT)... CONVECTION ASSOCIATED WITH PRE-FRONTAL CONVERGENCE AXIS CONTINUES TO SHIFT EAST ACROSS THE ARKLAMISS THIS AFTERNOON. SURFACE ANALYSIS SHOWS THE ACTUAL FRONTAL BOUNDARY DRAPED NEAR THE DELTA WHERE A DECENT DEW POINT GRADIENT EXISTS. MODEL GUIDANCE CONTINUES TO SHOW THE SURFACE BOUNDARY HANGING BACK IN VICINITY OF THE DELTA IN ONE FORM OR ANOTHER THROUGH MID WEEK BEFORE A STRONGER COLD FRONT SWINGS ACROSS THE REGION LATE THURSDAY OR EARLY FRIDAY. IN THE MEANTIME...A RELATIVELY WARM AND HUMID AIR MASS FOR MID SEPTEMBER IS GOING TO REMAIN IN PLACE ACROSS THE REGION SOUTH OF THE FRONT. DAYTIME HEATING OF THE WARM SECTOR SHOULD YIELD ENOUGH INSTABILITY EACH AFTERNOON FOR ISOLATED SHOWER/THUNDERSTORM ACTIVITY ACROSS MOST OF THE CWA...ALTHOUGH THE BEST CHANCES WILL BE FURTHER SOUTH/EAST WHERE THE DEEPER MOISTURE WILL BE. AS WE HEAD INTO THE OVERNIGHT HOURS ANY CONVECTION THAT DEVELOPS SHOULD DIMINISH...AGAIN WITH THE BEST CHANCES FOR LINGERING RAINS CONFINED SOUTH OF THE NATCHEZ TRACE. SEVERE STORM POTENTIAL CONTINUES TO BE MINIMAL AS ATMOSPHERIC FLOW REMAINS WEAK ACROSS THE DEEP SOUTH. NO CHANGES ARE PLANNED FOR THE HWO. ONE LAST THING TO MENTION WILL BE THE CHANCE FOR FOG TONIGHT ACROSS THE DELTA AND UP IN NORTH CENTRAL PORTIONS OF THE CWA. RAINS FROM THIS MORNING COUPLED WITH A LACK OF BOUNDARY LAYER DRYING WILL KEEP MOIST SURFACE CONDITIONS IN PLACE TONIGHT. CLOUD COVER SHOULD GENERALLY BE ON THE DECREASE ACROSS THIS REGION AS WELL AS DRIER AIR ALOFT PUSHES EAST. AS LONG AS THE CLOUDS TRY TO CLEAR OUT FOG SHOULD BE EASY TO COME BY CONSIDERING DEW POINTS WILL HANG AROUND 67 DEGREES OR SO. GFS POPS WERE ADJUSTED A BIT EACH PERIOD ALTHOUGH NO SIGNIFICANT CHANGES WERE MADE. GFS MOS TEMPS WERE REASONABLE AS WELL...WITH THE ONLY CHANGE BEING A BLEND WITH THE SLIGHTLY WARMER NAM MOS NUMBERS TUE AND WED NIGHT. /BK/ .PREVIOUS LONG TERM...(THURSDAY THROUGH MONDAY)... THE DEEPENING UPPER LEVEL TROUGH CROSSES THE GREAT LAKES WEDNESDAY AND WILL CONTINUE THE PROCESS OF CARVING OUT A MEAN LONGWAVE TROUGH AXIS OVER THE ERN CONUS FOR LATE THIS WEEK. RATHER WARM CONDITIONS WEDNESDAY WILL BE FOLLOWED BY A DOWNWARD TREND IN TEMPERATURES BY FRIDAY AS A STRONGER COLD FRONT MOVES THROUGH THE REGION ON THURSDAY. MORE COOL AND DRIER CONDITIONS ARE SET TO RETURN FOR YET ANOTHER GORGEOUS WEEKEND. THE POTENTIAL FOR SOME STRONG STORMS COULD DEVELOP ON THURSDAY AS THAT STRONGER COLD FRONT DIVES INTO THE THE AREA. THE BEST RISK FOR THESE STORMS SHOULD RESIDE OVER ERN/SRN MS WHERE LOW LEVEL 850MB THETA-E AIR OF 335C EXISTS DURING PEAK DAYTIME HEATING. WILL NOT INCLUDE ANY HAZARDS IN THE HWOJAN FOR NOW. THE FRONT APPEARS TO PUSH THROUGH THE REGION BY EARLY THURSDAY EVENING WITH CLOUDS LINGERING BEHIND THE FRONT INTO FRIDAY MORNING. THEN MUCH DRIER AIR WILL FILTER IN AS DEWPOINTS WILL DROP INTO THE UPPER 40S TO LOW 50S. HIGHS FRIDAY REACH INTO THE UPPER 70S WITH COOL NORTH BREEZES AND CLEARING OF CLOUD COVER. PLENTY OF SUNSHINE EXPECTED OVER THE COMING WEEKEND DAYS AS HIGHS PUSH CLOSE TO 80F AGAIN AND OVERNIGHT LOWS DIP INTO THE 50S FOR SEVERAL CONSECUTIVE NIGHTS. A DRY SURFACE RIDGE AXIS OF 1020MB AND PWATS DROPPING TO A MEAGER 0.5-1.0 INCHES SHOULD RESULT IN THE PLEASANT REGIME. GENERALLY FOLLOWED MEX GUIDANCE BUT USED A BLEND OF ENSEMBLE MEANS FOR A COUPLE OF MAXES. IF THE ECMWF WERE TO VERIFY EARLY NEXT WEEK WITH A CLOSED MID LEVEL LOW IN GA...WE COULD BE EVEN COOLER THAN CURRENTLY EXPECTED. WE WILL BE MONITORING THESE TRENDS AS THE WEEK PROGRESSES. /40/ && .AVIATION... CONDITIONS WILL BE VFR BKN-OVC 4-6K FEET THIS EVENING EXCEPT MVFR BKN-OVC 1500-3000 IN AREAS OF RAINFALL. LOOK FOR DETERIORATING CONDITIONS BY 06Z AS LOW LEVEL MOISTURE WILL REMAIN HIGH AND THE PRESENCE OF A STALLED SFC FRONT WILL HELP TO DEVELOP IFR/LIFR CEILINGS/VIS CONDITIONS FOR MOST OF THE 06-14Z PERIOD AS AREAS OF FOG DEVELOP. /CME/03 && .JAN WATCHES/WARNINGS/ADVISORIES... MS...NONE. LA...NONE. AR...NONE. && BK/CME/03
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSON MS 245 PM CDT MON SEP 19 2011 ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074- 201945- ASHLEY-CHICOT-MOREHOUSE-WEST CARROLL-EAST CARROLL-RICHLAND- MADISON LA-FRANKLIN LA-CATAHOULA-TENSAS-CONCORDIA-BOLIVAR- SUNFLOWER-LEFLORE-GRENADA-CARROLL-MONTGOMERY-WEBSTER-CLAY-LOWNDES- CHOCTAW-OKTIBBEHA-WASHINGTON-HUMPHREYS-HOLMES-ATTALA-WINSTON- NOXUBEE-ISSAQUENA-SHARKEY-YAZOO-MADISON MS-LEAKE-NESHOBA-KEMPER- WARREN-HINDS-RANKIN-SCOTT-NEWTON-LAUDERDALE-CLAIBORNE-COPIAH- SIMPSON-SMITH-JASPER-CLARKE-JEFFERSON-ADAMS-FRANKLIN MS-LINCOLN- LAWRENCE-JEFFERSON DAVIS-COVINGTON-JONES-MARION-LAMAR-FORREST- 245 PM CDT MON SEP 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL MISSISSIPPI... NORTHEAST LOUISIANA...AND EXTREME SOUTHEAST ARKANSAS. .DAY ONE...TONIGHT AND TUESDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...TUESDAY NIGHT THROUGH SUNDAY THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER CALL TO ACTION STATEMENT... THE ACTIVATION OF STORM SPOTTERS...HAM RADIO OPERATORS...AND EMERGENCY MANAGEMENT PERSONNEL IN SUPPORT OF SEVERE WEATHER OPERATIONS IS NOT EXPECTED THROUGH NEXT SUNDAY. FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WWW.SRH.NOAA.GOV/JAN. BK
MSZ056-057-192230-
SMITH MS-JASPER MS-
432 PM CDT MON SEP 19 2011
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
432 PM CDT MON SEP 19 2011
A STRONG THUNDERSTORM CAPABLE OF PRODUCING PEA TO DIME SIZE HAIL AND
40 TO 50 MPH WINDS WAS LOCATED 6 MILES SOUTHEAST OF RALEIGH AT 432 PM
CDT...MOVING NORTHEAST AT 20 MPH.
PEOPLE IN NORTHWESTERN JASPER AND SMITH COUNTIES SHOULD MONITOR THIS
STORM CLOSELY.
LAT...LON 3211 8910 3184 8947 3196 8962 3223 8936
3222 8923
TIME...MOT...LOC 2132Z 224DEG 16KT 3197 8946
DHBThe Jackson/Brandon,MS radar (KDGX), 103 km away, was scanning. The volume nearest the first event began at 02:46 UTC.
1 flash flood. Local standard time, as filed.
Three homes were flooded in Heidelberg. Several roads around town were washed out as well.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Mississippi in 2011Every state in 2011This day in weather historyWarnings in Mississippi, September 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: 339696.