Heavy thunderstorms brought heavy rainfall to southern Iowa once again on the 18th into the 19th. This caused the south fork of the Chariton River at Promise City to rise about a foot over flood stage for several hours.
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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 DMX wrote it up.
Heavy thunderstorms brought heavy rainfall to southern Iowa once again on the 18th into the 19th. This caused the south fork of the Chariton River at Promise City to rise about a foot over flood stage for several hours. The flooding was minor with little to no 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 Des Moines, IA wrote its last area forecast discussion before the first event at Sep 19, 11:43 AM CST, 51 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DES MOINES IA 1243 PM CDT SUN SEP 19 2010 ...UPDATED FOR 18Z AVIATION DISCUSSION... .SHORT TERM /TODAY/... SWV TRACKING INTO WRN IA SHOULD END MUCH OF THE PCPN AS IT TRACKS EWD TDA. EXPECTING A BREAK FOM THE RAIN FOR THE AFTN HRS FOR THE MOST PART IN SPITE OF THE QSTNRY FNT NERN KS INTO E CNTRL MO. DEEP MOISTURE FLOWING OVER THE BNDRY WILL MAINTAIN THE STRATUS DECK OVER THE STATE...PUTTING THE BREAKS ON THE MAX TEMPS AGAIN. WENT ARND 60 N TO 70 S...BUT HAVE SOME CONCERNS THAT MAY BE A CAT OR TWO TO THE HIGH SIDE OF THINGS. .LONG TERM /TONIGHT THROUGH SATURDAY/... LITTLE CHANGE IN OVERALL THINKING FROM PREVIOUS SHIFTS AS ACTIVE WEATHER PATTERN APPEARS SET TO PERSIST FOR MUCH OF THIS WEEK. DEEP TROUGH JUST OFFSHORE PACIFIC NORTHWEST WILL SLOWLY MOVE EASTWARD ACROSS NORTHERN U.S. AS A SERIES OF SHORTWAVES...WHILE IN THE LOWER LEVELS THE FRONTAL BOUNDARY THAT HAS REMAINED STALLED NEAR OUR AREA SO FAR THIS WEEKEND WILL REMAIN NEARBY...OSCILLATING NORTH AND SOUTH ACROSS THE CWA A COUPLE OF TIMES. BY TONIGHT A SURFACE CYCLONE WILL BE DEVELOPING ACROSS THE WESTERN HIGH PLAINS IN RESPONSE TO DEVELOPING SOUTHWESTERLY FLOW ALOFT AHEAD OF THE FIRST SHORTWAVE...BRINGING SURFACE WINDS AROUND TO SOUTHEAST THEN SOUTH BY MONDAY. THIS WILL RESULT IN THE AFOREMENTIONED STALLED BOUNDARY MOVING NORTHWARD ACROSS OUR AREA AS A WARM FRONT WITH WAA REGIME PRECIP POSSIBLE OVERNIGHT PARTICULARLY ACROSS OUR NORTHERN AND NORTHEASTERN COUNTIES. DURING THE DAY MONDAY WE WILL REMAIN WITHIN FAIRLY STRONG WAA IN THE LOW LEVELS AS SOUTHERLY WINDS INCREASE IN RESPONSE TO TIGHTENING PRESSURE GRADIENT...WHICH SHOULD LEND TO SIGNIFICANTLY WARMING TEMPS. THIS MAY BE MITIGATED BY STRATUS CLOUDS MAINLY ACROSS OUR NORTH AND NORTHEAST...BUT CONFIDENCE IN THIS IS TOO LOW TO MAKE MUCH ADJUSTMENT TO THE FORECAST ATTM. DID BUMP DOWN MONDAY MAX TEMPS A DEGREE OR TWO IN THOSE AREAS TO ACCOUNT FOR THIS POSSIBILITY. AS THE LEADING SHORTWAVE APPROACHES THE AREA MONDAY NIGHT IT WILL PUSH THE FRONTAL BOUNDARY BACK THROUGH AS A COLD FRONT TUESDAY...BRINGING RENEWED POPS AS THE PRECEDING SOUTHERLY FLOW WILL HAVE ALLOWED FOR A FAIR AMOUNT OF MOISTURE RETURN. THE BOUNDARY WILL ONCE AGAIN STALL NEAR NORTHERN MISSOURI...THEN LIFT NORTHWARD AGAIN WEDNESDAY IN ADVANCE OF THE NEXT SHORTWAVE. THE SCENARIO WILL THEN REPEAT ITSELF WITH ANOTHER COLD FRONT AND RENEWED POPS WEDNESDAY NIGHT/THURSDAY...ALTHOUGH THE SHORTWAVE WILL BE MORE VIGOROUS THIS TIME AROUND AND PRECIP COULD BE MORE WIDESPREAD/INTENSE. HAVE INCREASED POPS TO LIKELY IN THE NORTHWEST WEDNESDAY NIGHT AND TOP OF CHANCE CATEGORY ACROSS MOST OF THE CWA ON THURSDAY AS THERE IS A STRONG AND CONSISTENT SIGNAL FOR WIDESPREAD SHOWERS AND STORMS DURING THESE PERIODS. EXPECT THIS INCREASING POP TREND WILL CONTINUE FOR WED NIGHT/THURSDAY ON SUBSEQUENT SHIFTS. BEHIND THIS FRONT DRIER AND COOLER WEATHER STILL APPEARS ON TAP FOR THE END OF THE WEEK. && .AVIATION... 19/18Z...LOW CIGS AND AREAS OF FOG WILL PRODUCE WIDESPREAD MVFR TO IFR CONDITIONS THROUGH TONIGHT AS A WARM FRONT SLOWLY LIFTS INTO THE STATE. WINDS WILL REMAIN FROM THE EAST TODAY BUT GRADUALLY SHIFT MORE SOUTHEASTERLY WITH TIME AS THE FRONT PUSHES INTO THE STATE. IMPROVEMENT TO THE LOW CIGS AND VSBYS IS EXPECTED ON MONDAY MORNING AS MIXING IMPROVES AND DRIES OUT THE LOWER LAYER OF THE ATMOSPHERE. && .DMX WATCHES/WARNINGS/ADVISORIES...NONE. && SHORT TERM...MS SEP 10 LONG TERM...LEE AVIATION...COGIL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DES MOINES IA 456 AM CDT SUN SEP 19 2010 IAZ039-044>050-057>062-070>075-081>086-092>097-201100- BLACK HAWK-CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-TAMA-AUDUBON- GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-WARREN- MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR- RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS- 456 AM CDT SUN SEP 19 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT THERE IS A CHANCE OF THUNDERSTORMS FROM THIS EVENING THROUGH TONIGHT. SEVERE WEATHER IS UNLIKELY...BUT A FEW STORMS COULD PRODUCE SMALL HAIL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORM CHANCES WILL RETURN INTERMITTENTLY FROM LATE MONDAY NIGHT THROUGH THURSDAY. A FEW SEVERE STORMS AND LOCALLY HEAVY RAINFALL ARE POSSIBLE DURING THIS PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. IAZ004>007-015>017-023>028-033>038-201100- EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN- WEBSTER-HAMILTON-HARDIN-GRUNDY- 456 AM CDT SUN SEP 19 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA. .DAY ONE...TODAY AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS WILL OCCUR AT TIMES TODAY AND TONIGHT. SEVERE WEATHER IS UNLIKELY...BUT A FEW STORMS COULD PRODUCE SMALL HAIL. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THUNDERSTORM CHANCES WILL RETURN INTERMITTENTLY FROM LATE MONDAY NIGHT THROUGH THURSDAY. A FEW SEVERE STORMS AND LOCALLY HEAVY RAINFALL ARE POSSIBLE DURING THIS PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. LEE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
826 AM CDT SUN SEP 19 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1245 AM HAIL 1 W MOUNT AYR 40.71N 94.25W
09/19/2010 M1.25 INCH RINGGOLD IA TRAINED SPOTTER
SPOTTER ALSO REPORTS 6.97 INCHES OF RAINFALL ALONG WITH
THE HAIL.
&&
JHThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2010Every state in 2010This day in weather historyWarnings in Iowa, September 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: 254791.