The remnants of Hurricane Isaac, brought some much needed relief to drought conditions across the area, on the 1st of September. This helped improve drought conditions from D4 and D3 to D3 and D2.
Every event with a place to put it; 7 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 EAX wrote it up.
The remnants of Hurricane Isaac, brought some much needed relief to drought conditions across the area, on the 1st of September. This helped improve drought conditions from D4 and D3 to D3 and D2. Rainfall totals were from one inch across northern portions, to around 7 inches central and south.
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 Kansas City, MO wrote its last area forecast discussion before the first event at Aug 31, 11:34 PM CST, 26 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 1234 AM CDT Sat Sep 1 2012 ...UPDATED AVIATION DISCUSSION... .DISCUSSION... Tonight through Saturday Night... Rainfall amounts from the remnants of Isaac will be the main focus for the short term forecast. Banded precipitation arcing north of the cyclone center seems tied to moderate frontogenesis in the 950 to 900 mb layer, and has produced up to an inch and half of rainfall in southeastern portions of the forecast area already today. Models indicate weakening frontogenesis as the band separates from the low center this evening; however, scattered light to moderate showers will fill in behind, and additional banding should develop tonight. Any bands that develop will continue to lift north and rotate west; but as the low center pushes eastward, the bulk of precipitation will also transition eastward. Rainfall totals of 2 to 4 inches still look reasonable east of a line from from Unionville to Lexington to Clinton, where rainfall will be a bit more persistent and heavier tonight through Saturday. Across the west, rainfall will become more scattered as frontogenesis wrapping to the west becomes ill-defined on Saturday, so have lowered the chance of precipitation below the definite category beginning Saturday morning. The eastward clip of Isaac looks faster than depicted in previous model runs, so have tapered precipitation out of the area a little more quickly on Saturday evening through Saturday night. Temperatures will be relatively steady for the rest of today and tonight, with minimal rises expected across the majority of the area Saturday, and perhaps a 10 to 15 degree diurnal range in the far west and northwest. Dewpoints will also be relatively consistent in the mid to lower 70s, then will mix out slowly as the system exits on Saturday. Laflin Medium Range (Sunday through Friday)... The start of this forecast period is farewell to what's left of Isaac. The far eastern CWA will be on the far western periphery of Issac's circulation so can't totally rule out a few early showers Sunday. Otherwise, a brief drying out phase Sunday into Monday with one element that has been missing this Summer.....high humidity. With plenty of moisture left over from Isaac and lacking any type of drying mechanism expect to see seasonably high dewpoints/RH last into mid week. While the medium range models are showing similarities in the overall mid/upper level pattern from Tuesday through Friday there is enough spread between them as well as some inconsistencies in individual model runs to not go overboard on pops. This period will feature an active northern stream with at least two significant shortwave troughs digging southeast through south central Canada and into the north central states. Heights begin falling as early as Monday night forcing an associated cold front and pre-frontal convection towards the CWA for Monday night and Tuesday. Made only minor adjustments to pops from Monday night through Wednesday. There is enough confidence in the GFS/ECMWF timing of a dome of high pressure moving into the region to gradually strip out pops for Wednesday night. Cooler/drier air will finally shove southward for Thursday. Have gone with model consensus which is cooler than seasonal averages. The next shortwave that digs into the north central U.S. will allow return flow and warm air advection convection to bring a chance of rain back into the region on Friday. This far out timing issues are a concern so will go with just low end chance pops. MJ && .AVIATION... For the 06Z TAFs...TD Isaac centered near Clinton Missouri continues to bring IFR ceilings and MVFR visibilities in light to moderate rain over the area. The current satellite...radar...and newest model guidance all indicate that the northwest quadrant will be more active than previous guidance suggested. Therefore...will continue prevailing conditions until late in the morning when Isaac will finally begin to move eastward. Expect a little lower ceilings for the afternoon through the end of the period as saturated conditions continue near the surface. Adolphson && .EAX WATCHES/WARNINGS/ADVISORIES... MO...NONE. KS...NONE. && WFO EAX
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 624 PM CDT FRI AUG 31 2012 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-011145- ATCHISON KS-MIAMI-LINN KS-DONIPHAN-LEAVENWORTH-WYANDOTTE-JOHNSON KS- ATCHISON MO-NODAWAY-WORTH-GENTRY-HARRISON-MERCER-PUTNAM-SCHUYLER- HOLT-ANDREW-DE KALB-DAVIESS-GRUNDY-SULLIVAN-ADAIR-BUCHANAN-CLINTON- CALDWELL-LIVINGSTON-LINN MO-MACON-PLATTE-CLAY-RAY-CARROLL-CHARITON- RANDOLPH-JACKSON-LAFAYETTE-SALINE-HOWARD-CASS-JOHNSON MO-PETTIS- COOPER-BATES-HENRY- 624 PM CDT FRI AUG 31 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWEST...NORTH CENTRAL AND WEST CENTRAL MISSOURI...AS WELL AS EXTREME EASTERN KANSAS. .DAY ONE...TONIGHT THE REMNANTS OF TROPICAL STORM ISAAC WILL CONTINUE TO MOVE THROUGH THE AREA TONIGHT...BRINGING RAIN AND POSSIBLY AN ISOLATED THUNDERSTORM TO THE MAJORITY OF THE REGION. ALTHOUGH SEVERE WEATHER IS NOT EXPECTED...HEAVY RAINFALL IS POSSIBLE MAINLY ALONG AND EAST OF A LINE FROM CLINTON TO KIRKSVILLE. SOME LOCALIZED FLOODING IS POSSIBLE IN THOSE LOCATIONS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY RAIN IS LIKELY AS ISAAC PROGRESSES THROUGH THE AREA ON SATURDAY AND INTO EARLY SUNDAY. SOME LOCALIZED FLOODING IS POSSIBLE IN AREAS RECEIVING HEAVY RAINFALL. AFTER ISAAC EXITS THE REGION SUNDAY...A SERIES OF DISTURBANCES WILL MOVE THROUGH THE AREA FROM MONDAY NIGHT THROUGH THURSDAY WITH A CHANCE OF SHOWERS OR THUNDERSTORMS EACH DAY. HOWEVER...THE THREAT FOR SEVERE STORMS IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. DEROCHE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL 859 PM CDT FRI AUG 31 2012 KSZ025-057-060-102>105-MOZ001>008-011>017-020>025-028>033-037>040- 043>046-053-054-011200- ATCHISON KS-MIAMI-LINN KS-DONIPHAN-LEAVENWORTH-WYANDOTTE- JOHNSON KS-ATCHISON MO-NODAWAY-WORTH-GENTRY-HARRISON-MERCER- PUTNAM-SCHUYLER-HOLT-ANDREW-DE KALB-DAVIESS-GRUNDY-SULLIVAN-ADAIR- BUCHANAN-CLINTON-CALDWELL-LIVINGSTON-LINN MO-MACON-PLATTE-CLAY- RAY-CARROLL-CHARITON-RANDOLPH-JACKSON-LAFAYETTE-SALINE-HOWARD- CASS-JOHNSON MO-PETTIS-COOPER-BATES-HENRY- INCLUDING THE CITIES OF...ATCHISON...PAOLA...MOUND CITY...TROY... LEAVENWORTH...KANSAS CITY KS...OVERLAND PARK...OLATHE...TARKIO... ROCKPORT...MARYVILLE...GRANT CITY...ALBANY...STANBERRY... BETHANY...PRINCETON...UNIONVILLE...LANCASTER...DOWNING...OREGON... SAVANNAH...CAMERON...GALLATIN...JAMESPORT...TRENTON...MILAN... GREEN CITY...KIRKSVILLE...ST. JOSEPH...PLATTSBURG...KINGSTON... HAMILTON...POLO...CHILLICOTHE...BROOKFIELD...MACON...LA PLATA... PARKVILLE...PLATTE CITY...WESTON...LIBERTY...EXCELSIOR SPRINGS... RICHMOND...CARROLLTON...SALISBURY...KEYTESVILLE...MOBERLY... KANSAS CITY...INDEPENDENCE...LEXINGTON...CONCORDIA...MARSHALL... FAYETTE...NEW FRANKLIN...RAYMORE...HARRISONVILLE... PLEASANT HILL...WARRENSBURG...SEDALIA...BOONVILLE...BUTLER... RICH HILL...CLINTON 859 PM CDT FRI AUG 31 2012 ...REMNANTS OF ISAAC BRINGING MUCH NEEDED RAIN TO MOST OF THE REGION... THE REMNANTS OF ISAAC...CURRENTLY LOCATED ACROSS PORTIONS OF CENTRAL MISSOURI THIS EVENING...WILL GRADUALLY SHIFT INTO EASTERN MISSOURI THROUGH THIS WEEKEND. ISAACS IMPACT WILL TAPER OFF FROM WEST TO EAST BEGINNING SATURDAY AFTERNOON WITH RAINFALL AMOUNTS DROPPING OFF NOTICEABLY. IN THE MEANTIME...SPIRAL BANDS OF MODERATE TO HEAVY SHOWERS AND POSSIBLY A FEW EMBEDDED THUNDERSTORMS WILL ROTATE COUNTERCLOCKWISE AROUND THE CENTER OF ISAAC THROUGH SATURDAY. BY THE END OF THE WEEKEND...AREAS SOUTHEAST OF A KIRKSVILLE TO CLINTON LINE ARE EXPECTED TO RECEIVE THE HEAVIEST RAINFALL OF 2 TO 4 INCHES...WITH LOCAL AMOUNTS UP TO 5 INCHES POSSIBLE IN CENTRAL MISSOURI. HOWEVER...SOME AREAS FURTHER WEST NEAR KANSAS CITY HAVE RECEIVED NOTABLE RAINFALL AMOUNTS OF OVER 2 INCHES OF RAINFALL ALREADY THIS EVENING. RAINFALL TOTALS WILL DROP OFF RAPIDLY ACROSS THE NORTHWEST CORNER OF MISSOURI WITH THESE AREAS MISSING OUT ON ANY SIGNIFICANT RAINFALL. RAINFALL AMOUNTS THROUGH 8PM... NW LIBERTY...2.65" OVERLAND PARK...2.19" DOWNTOWN KC...2.17" WHITEMAN AIR FORCE BASE...2.14" CARROLLTON...1.96" BOONVILLE...1.83" OTTERVILLE...1.70" SEDALIA...1.55" OLATHE (OJC)...1.54" CLINTON...1.48" PLEASANT HILL...1.37" CHILLICOTHE...1.33" LEES SUMMIT...1.25" KIRKSVILLE...1.14" KCI...0.53" ST JOSEPH...0.38" ALTHOUGH THE RAINFALL WILL BE EXTREMELY HELPFUL IT WILL ONLY MAKE A SMALL DENT IN THE EXTREME AND EXCEPTIONAL DROUGHT CONDITIONS WHICH PLAGUE EASTERN KANSAS AND MOST OF NORTHERN...WEST CENTRAL AND CENTRAL MISSOURI. THOSE AREAS WHICH RECEIVE HEAVY RAINFALL COULD SEE SIGNIFICANT AND RAPID WITHIN BANK RISES ON AREA STREAMS AND SMALLER RIVERS WITH LOCALIZED FLOODING POSSIBLE IN PARTS OF NORTHEAST AND CENTRAL MISSOURI. THOSE CAMPING NEAR WATERWAYS THIS LABOR DAY WEEKEND...ESPECIALLY EAST OF A BETHANY TO BUTLER LINE SHOULD MONITOR RIVER AND STREAM LEVELS FOR ANY RAPID RISES AND HEAD TO HIGHER GROUND IF NECESSARY. STAY TUNED TO THE LATEST WEATHER INFORMATION FROM NOAA WEATHER RADIO...LOCAL MEDIA...OR TRUSTED INTERNET SOURCES FOR THE LATEST DETAILS ON THE REMNANTS OF ISAAC. DEROCHE
The national radar mosaic for the moment the first event began.
7 drought. Local standard time, as filed.
Extreme drought conditions were observed across the county. Rainfall was 3.67 inches in Atchison.
Severe to extreme drought conditions were observed across the county. Rainfall was 1.84 inches in Troy.
Drought conditions improved to severe across the county. Overland Park measured 7.59 inches of rain for the month.
Extreme drought conditions were observed across the county. Rainfall was measured at 4.05 inches in Leavenworth, and 3.04 inches in Easton.
Severe drought conditions were observed across the county. Mound City measured 7.55 inches of rain.
Severe drought conditions were observed across the county. Osawatomie measured 5.69 inches of rain.
Extreme drought conditions were observed across the county. Bonner Springs measured 3.95 inches of rain.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kansas in 2012Every state in 2012This day in weather historyWarnings in Kansas, 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: 412092, 412093, 412094, 412095, 412096, 412097, 412098.